Some standard content:
Verification Procedure for DC Comparator Potentiometer JJ(:505—17
DC Comparator Potentiometer
Verification Procedure
Verification Procedure DC Comparator Potentiomtrr JJG505—1987 This verification procedure was approved by the State Metrics Department in June 1987 and was implemented on April 6, 1986. Responsible unit: China Metrology Research Institute Drafting unit: Dianliujiang Metrology Verification and Testing Institute The technical content of this regulation is the responsibility of the drafting unit. The main initiator of this regulation: Wang Yong (Enlongjiang Metrology Verification and Testing Institute) 542 Technical requirements Verification items: -1 Appearance and measurement inspection [II] Moisture resistance and water recovery test tt|| (three machines, secondary work flow adjustment and display of the current caused by the work of the fixed measurement range (four) the area of the auxiliary output of the compensation will be the effective technical measurement of the pressure five, the degree of information also the balance system and the current meter system to the index (six) the installation of the electromotive force and the judgment of the transmission potential exhaustion () thank the quantity disk my self-test and calculation
[eight) overall verification..
calibration result processing and calibration cycle
carving linearity self-test table consultation
Appendix 2 linear daily calibration calculation formula derivation thank record 3 linearity calculation example
re-current comparison ceremony potential difference discussion calibration procedures standard procedures suitable for new production under pressure, use the neutral and repair egg after the embarrassment automatic balance of the DC comparison potentiometer (hereinafter referred to as the comparison potentiometer or potential difference The calibration of the meter is to compare the potential of the variable resistance current meter by automatically adjusting the current in the measuring winding and determining the constant measuring current: thereby obtaining a continuous compensation voltage. The principle of the variable resistance current meter is shown in the figure 1. The measuring winding and the secondary winding have a variable level and a fixed secondary winding respectively flow through a constant current and a variable DC system. They generate opposite magnetic potentials on the core, and the magnetic difference is detected by the detection winding, and the secondary winding is adjusted by a differential adjustment system (hereafter referred to as the secondary winding). The current will automatically shrink. After using the standard battery to adjust the potentiometer, the ratio of
and the primary current can be determined. Because the secondary current is positive, the compensation voltage of the measuring resistor in the secondary circuit is equal to the ratio of the measured voltage to the primary turns at the same time multiplied by the electromotive force of the standard voltage. This is the working principle of the standard potentiometer using the ratio of the ratio of the primary voltage to the primary turns. The formula is as follows: if the working current
is adjusted, the standard voltage is placed at the measuring resistor R4: or at the end, and the secondary voltage is adjusted to the minimum value of the standard battery electromotive force E after the overflow peak is positive, the constant current battery I is adjusted, or the secondary current is fine-tuned, that is, the correction (or more accurate) is made to make the test current indicator W1, the primary current is 12, and the secondary current is adjusted to W, then E = R
l,W1-l2.Wn
hMeasured potential
Measured potential 5, press R!, keep the primary current and secondary current constant, set the current of the measuring disk as W, change the secondary current to
IWt = 12.W2-
[3] Divide by [4], divide by [2], get F
(7) Formula is the technical relationship of the potentiometer, it shows that the measured electromotive force is only related to the measuring disk related parameters and the standard cell potential, similar to the derivation process can be right: [: R. etc. from the set current to the measurement time small changes, part of the formula will not be completely reduced, so the lamp to ensure its measurement accuracy: not only the measurement information should be checked, but also the Its other indicators are up to the standard. Note: Some of the three-stage meter specifications are as follows: the total current is determined by connecting the battery to the resistor R, and then the standard voltage F is connected to R. This is a very accurate measurement. The accuracy level of the meter is 1.005, 0.01, 1.02, and 1.005. The same range accuracy is the same. The values may be different.
2 Under standard conditions, temperature: 20±2℃, relative humidity: 25%-75%, power supply voltage: 220V (1±5%), rated frequency: 50=1Hz: within 10min after calibration (adjusting the working voltage and drawing the process), the basic allowable control limits of the potentiometer are:
allowable limit of basic error (V);
in: Em
relative index, expressed as a percentage;
X—Scale (measurement) indication (V
-Base value (V): The maximum energy value of 1C in each early process. The base value includes the residual heat of the electric potential, and the compensation of the electric heat for 10min. sx14C will be
4 The value of the low-frequency noise of the potentiometer
5 The limit recognition error of the potentiometer
6 The nonlinear error of the measuring disk!
The fractional part is allowed to have a slight withering (but the adjustment cannot exceed every six months, When the dose indication changes. The change in the switching current caused by the cut-off current is less than 0.0.9. The current adjustment of the potentiometer should be continuous, and the adjustment range should not be less than 1.1%. The adjustment should be careful. 1% above the 10.001 level, the resistance between the primary return and the external charge should not be lower than IG: that is, the insulation resistance of the grade below F2G: 0.U002 level. The transformer primary and the shell can withstand the actual 5111z, 150)V AC voltage, and the positive I to: in5+5
signal E test without being broken. ||t t||120.0001 and above levels, the effective value of the internal ripple voltage in the output of the potentiometer is 1.0%x, and the ripple voltage after connecting the filter is 0.1%×m; 0.0002 levels and below, the effective width is twice the requirement, Xm is the upper limit of the measurement of each range 13. The maximum number of circuits for the potentiometer to input external power is 7V, 14. The internal leakage meter indicators are: when the display machine is in vibration and the external circuit is 2, 0.(level is based on the voltage division elimination CySnv/ea of the potentiometer, the peak rate value of the positive noise voltage is 10nv, the ticket voltage SnV/mia of the potentiometer below level 1.000, the noise and group requirements remain unchanged. 3. Verification conditions
15 Qualification conditions: Verify under the standard conditions specified in Article 2, 16-cycle verification required equipment
16.1h potential difference between the internal resistance greater than 0.2C% and the standard discharge old foot (the potential difference meter outputs seven voltages every month, and only one constant current source is used for each battery), which can be: temperature control or temperature control accuracy is not less than .17:/241.1 or above standard battery, or temperature control sugar content is lower than 10,000 million/240.005 level and standard battery.
16.21H-·250V absolute resistance test position [negative resistance meter] or disconnected resistance electrode 116.3 Converter DC effective digital voltmeter 1 set: 16.4
Meet the requirements of 14 military control instruments [compatibility (potentiometer without built-in current detection or built-in detection meter is not suitable]: verification
Verification 1
Verification item II
New, secondary plan·Two-bath network, measurement research, improvement 1. Make electric consumption evaluation and excitation components
Play through the mountain power transmission
The most changeable and cause the chemical
Buy standard design
Some black and sparse electric heads
Micro-source sound
Non-change thermal power station
Measurement plate green stove shop
The voltage of the whole Beijing
is attached with the inspection mark
and the effectiveness of the whole experience
. The sample of the American model is only in place! , Record. 546
Mountain factory
table: "" table should be set, "-", the table is small, it is not tested, "+" indicates that the relevant part of the technical item performance should be tested, and zero is not tested. In the items related to the process factor, and the relevant changes in thermal potential in "×1\, the following programs are all set accurately: the electric labor drift standard is not less than 10.1V in the measurement mother upper limit, and the linearity and low-frequency noise are tested in the stacking benefit program. Five verification methods
verification can refer to the 2:1 [42 type comparison potentiometer Bailing circuit diagram (other models of circuits are similar,
Le dynamic 0.250
VT
---t------i
(10010
11>Jum+t
21× rmf[
Main control and main function test chip
Figure 2UJ2 type comparator potentiometer inspection circuit diagram (--) Inspection of appearance and egg detection function
18 Appearance inspection|| tt|| The panel or nameplate should include the product name, model and manufacturer number: accuracy, manufacturer name or trademark, manufacturing date, etc., as well as the original components of the buttons, switches, and nozzles to ensure correct use. The exposed parts should be intact, the button chain should be locked, the switch can be turned to all working positions and positioned correctly. In addition to the newly produced potentiometer, all parts should be intact. When the potentiometer is defective, The meter should be tested for the following reasons:
19 The most functional tester
The meter is normally used by pressing the button on the board Each terminal button, the indicator light of the machine pressure oscillator is virtual. If the indicator light is not charged, you should immediately shut down the machine for inspection and eliminate the errors (including wiring errors)! After that, you can restart the machine: high, low After the fault is adjusted, the pointer value of the balance meter is within the allowable scale, and the potentiometer should be able to be adjusted to zero in the zero potential output state (the potentiometer produced by the pro is connected to the positive and negative buttons of the current meter). In this state, it is necessary to indicate in the certificate 1), and it should be able to adjust the working current, and it should be able to use the internal reference voltage for stability and potential difference analysis. If its stability is higher than its accuracy, then we must find out the cause and eliminate it before we can proceed with the following verification. Measurement of continuous resistance
Left mark leakage, After the sliding line is stable for 24 hours, the voltage between the circuit and the external and secondary connection pieces is 100-25V, and the external voltage is measured by a medium or high-voltage bridge. 1. The error between the conductive parts, the secondary circuit and the external circuit, and the primary and secondary circuits shall not exceed 20%. After the arc is stable for 2 hours under standard conditions, short-circuit the primary group of the power transformer, disconnect the power transformer from the circuit or disconnect the high voltage The high potential detector is connected to the conductive type of the transformer primary and low potential terminals. A 50JV, SUHz real inverse sine wave test is applied for 1:nir. The voltage rise and fall rate is Medicine Years Us, Not Green To be qualified:
The power of the high-speed tester meets the relevant requirements of IFC414 publication, and the relay operating current is 5mA when it breaks down
Sheng: [41 Document definition: (high +: test The device is fully adjusted to a set (test) voltage of 53°C and is tested according to the requirements. If the drop in the current column voltage is not greater than 10°C, the function is considered to be sufficient. (Three ) The initial and level working current indicators and indications of the variable-speed turbine start-up and the measurement of the cavitation reduction of the variable-speed turbine start-up and the level working current humidity adjustment standard of the country, the reverse and continued work and the group of waste pick-ups 22.1 will be the 16.1 of this regulation The standard battery for calibration is connected to the potentiometer close to the voltage difference indication as specified in the paragraph, and the potential difference indication value is set to the standard battery electromotive force signal E, and the primary current adjustment disk is replaced by the middle position. Press the measurement ×1 and appropriate galvanometer recording button to make the indicated value change by 1mV. The galvanometer phase deviation change should be above 1mm and will not exceed the scale. Then return the indicated value to the lower position and turn Each primary current adjustment disk is moved to the two terminal positions respectively, and the change in the galvanometer deviation is less than 2△: it is qualified for the regulating tank. 22.2 In the high-speed state and the medium-speed galvanometer carbon relay, the dew step is rotated Each primary current adjustment plate is set to the two final elimination positions: the number of bias grids produced by the step-less step in one plate is equal, and the sum of the bias grids produced by the next plate is not less than the previous one, and the bias grids produced by each step are equal. 22.3 After the current measuring key is turned on to set the working current, turn the primary current adjustment dial to change the minimum value, M is the adjustment value. The galvanometer changes the number of grids, and the voltage constant when the ratio is determined by the measuring disk is 100
degrees qualified.
23 Turn the filter adjustment disk N, re-enter the steps 22.1, 22.2, and 22.3, and determine the idle current, continuity, and adjustment plug of the working current. ||tt| |24 Measure the change in working voltage caused by the change in the indication. Check the following 2.1. Initially, use a potentiometer with an adjustable resistor, connect the calibration standard to the standard terminal of the potentiometer according to the polarity, and press Turn on the corresponding function switch, connect it to the setting circuit, adjust the working current with the initial current adjustment dial on the ground high-voltage transformer F, and then turn the first three measuring instruments from the minimum to the maximum indication. Find out the number of changes in the galvanometer's segment + then the initial current will be relative = up.
24.2 For a few level-adjusting circuits (such as UIB-2), the voltage measurement can be performed according to the voltage measurement shown in Figure 3, that is, a constant-temperature magnetic field is connected in series at the output end of the level-adjusting circuit. The temperature coefficient of standard electrolytic emulsion makes its total electrical use longer and graded electrolytic emulsion. The product is close to the standard battery electromotive force. The standard battery is connected to the working state of the low electromotive force potential drop meter. After the drop is connected, it is connected to the single resistor ratio. First, the low electromotive force center is calculated to obtain the signal (a 1R), adjust the indication appropriately to make the galvanometer zero, and then rotate the comparator in the same way as 21 to check the front plate of the electric book difference meter. The maximum output voltage of the 25-level circuit is measured by first measuring the maximum output voltage of the circuit with a potential difference of 25. The maximum power of the circuit is 25. The letter is suitable for the top tilt sign, the enterprise adjusts the potential plan to about 7V, the rated value of the giant disk, and the secondary current meter indicates the full effective bottom load, the wind distance is increased, and the setting is maintained. The value indicated by the ammeter pointer in the substation box is 1.0, and the current is "1.0". Then, R is the positive current of the external load, and the reading rate of the ripple voltage is
26||tt| First, connect the galvanometer terminal of the potentiometer, then connect the AC true RMS digital voltmeter to the terminal, install the most sensitive key of the galvanometer, and then , technical filter in two states, the potentiometer sensitive high range including the indication value to measure the upper limit, the digital voltmeter to measure the potential of the meter level by the effective value of the voltage, [V. Magnetic potential level transmission system and sexual flow System support standard measurement 2T magnetic potential balance meter (Anwu balance meter, AT meter) scale value AT determination first set the egg plate indication to 100, measure the disease red gold road: then lower the ambient temperature, instrument T Table pointer extension in - When the scale line that allows confirmation is reached, press the measurement "×1" and the galvanometer will move to the maximum. The voltage tolerance of the warping position is C=4jV/mm, and then the low heel is broken, and the other room
makes the pointer point to another scale line that allows deflection:, at this time the galvanometer deflects . If the value is not large, +0x+
29, the overall reading difference is high, and after low tracking, the value of each trend number measurement diagram is set to zero. When measuring the first rotation from zero to zero, the pointer of the barometer should not exceed the allowable moment. When measuring the pressure of the other integer rotations from zero to zero, the pointer should not exceed the allowable moment. Exceeding the allowed limit Half, 29 attached galvanometer finger measurement
short household position difference meter unmarked terminal button, make the galvanometer drop back to 21, the indication value is zero. Press the measurement "×1" The galvanometer is the most sensitive, the indication changes 7.1V, the dimming effect is implemented, the galvanometer deflects 20mm (0.0001 level or more) or 1(inum ([0.:100)2 level or less) , then the voltage tolerance value C is SrV/mm and 10nV/mm, and the drift grid and the maximum jitter grid number are recorded in the same specification, and their product is the ticket shift electric industry: 30 measurement circuit switch After the action, the measurement basis of the thermoelectric electromotive force is below the full range of "×1\, Cy=4uV/inm, and the ammeter F is pressed after the potential drops to zero. The reverse signal (power supply is not negative) is measured by the detection method. The deviation is slightly: -, then the thermoelectric potential = ((a-)/2, if the button is released and then pressed again, the effect is single e concentration, point The maximum change of one e should not be less than 1,519
(VI) The measurement of external compensation electromotive force and low frequency sound will lead to the upper limit of 3 1, and the measurement of electromotive force source shift and low frequency dryness will be The voltage of the constant batch source is about ten "standard" settings: connect the bad source in series with the good potential difference meter, and measure the electromotive force according to the potential difference meter. Close the cover plate of the potential difference meter, stop the normal machine, and adjust the meter to position X according to the current timing and standard. If the meter shows a value that is balanced with the standard self-battery electromotive force: adjust L=0.1 V/mm 1rV/mm (10V range): natural layer, every 10rr.imRecord the number of galvanometer deviations (when the current source is zero-point drifting, it should be adjusted back to zero by dividing by 10) and the number of pull-outs, record four times in total, then the maximum change of any one scale is the source displacement electromotive force of the upper limit of measurement, and the other scale number is the upper limit of the apparent electromotive force, which is not less than 7x. and 25x00xw respectively.
If the internal standard voltage drift exceeds the specified value, the constant current source can be connected to the external calibration standard battery for re-measurement. If it is closed at this time, this indicator is still qualified: but it must be in the calibration certificate. Note: The compensation electromotive force drift is qualified when the constant current source is connected to the external standard voltage, and the internal standard voltage must be replaced. 32 When the electromotive force drifts at zero indication, the measuring end circuit is adjusted to 4nV/nm, and the potentiometer adjustment knob is lowered to make the meter indicate zero. Similarly, the number of 10 positive and negative galvanometer dithering grids is recorded four times, and the results are recorded. When the electromotive force drifts at zero indication, 4Ce and 00·0% are not larger, which is qualified. +10010 and 00·0
white vertebra.
33 Preparation before inspection
(center) The self-inspection of the measuring disk and the self-inspection of the meter
linearity are completed by a series of comparisons, including intra-disk comparison and time transition. The method is to connect two windings with the same nominal value in reverse series in a short circuit, pass the primary rated current, use the left method to determine the voltage generated by the difference in voltage on the measuring resistor, and calculate the ratio. The schematic diagram is shown in Figure 4. In order to produce the largest possible voltage drop due to the safety difference, the unknown button of the potentiometer should be short-circuited with a clean wire (sheet) at the highest range, and the measured indication should be zero. After the power is turned on and preheated for 2 hours, adjust the galvanometer reverse rotation rate to C: 4nV/mm (when it is under the range of "x10\, it can be adjusted, and the potential difference rate is adjusted again. When the power is stopped, the measured indication value increases to make the galvanometer deflect in the direction of "up" (the reading is greater than the reference voltage at the end of the inspection), and the other direction is "*". And when the power is turned on, the above-mentioned direction remains unchanged, that is, one side of the galvanometer is always "+" and the other side is always "-". The internal comparison of the 34-meter dial
will turn the high-voltage rotary knob counterclockwise to eliminate the manual follow-up. Set the test panel/control switch to 1, for the first test panel: when the indication is 1/2, the 1-0 winding is reversed with the reference potential of the industrial panel, and compared with the test standard, press the highest screen to test the maximum current, and read the double-gauge current meter response number at the positive and negative polarities of the power supply, respectively, ..., then the panel is 1, then the indication is compared with the test standard, and the test current is obtained. The indication of the panel is increased, and the number of test meter deviations is read under each indication. 550
Then set the test switch to the other positions respectively, and compare the reference winding of the service panel with each winding of the panel, and read the number of test meter deviations of each indication as above. The difference between the reference standard and the minimum value is 0. =2 (, Ang-)(v, formula is the measuring disk number: 35 Fractional pressure measurement disk inspection comparison
Fractional side disk (2 electrical difference meter island) that does not share the system group? Individual disk comparison: The fractional pressure disk that can be stepped on only has the largest disk internal comparison. The error of the shunt current does not affect the disk comparison and the results. Their disk comparison results are equal. 35.1 The fractional function disk is equipped with a separate reference winding. It uses the 10 indications of the next disk as a reference standard to compare the values of each indication of the disk. The time of its measurement is one direction, so the filter will be used to transfer the mixed fraction back to the primary circuit, and keep the two numbers equal in the future, so as to maintain the nominal value of the primary magnetic potential as the rate, The measuring/testing switch is in the measuring position. When the value is comfortable, turn the zero adjustment knob to make the galvanometer indicate the correct value. Set the dial to -1 for fine-tuning (there is no -1 indication), and then adjust the potentiometer to zero the galvanometer again. 35.2 The sum of the 10 indications of the next dial is used as the test standard. The values of the previous dial are calibrated by the incremental logic method: the measuring dial, 1-[the dial and the secondary dial are equal to the step value of the dial, and the indication of the second dial is in accordance with the specification in Appendix Table 2. - is set, and when the power is turned off, read the ammeter deviation number a-, - (when the warning mark is set) and, (including the minimum value), the average value is (-) and = (a\, -α), then the difference voltage between the controlled indication and the actual value is -(ara
If the galvanometer cursor deflects to the right significantly, the secondary (or primary) should also increase or decrease the factory minimum step so that the galvanometer basically returns to zero, but this must be outside a value conversion process, that is, 36 disks are passed between two indications.
36.1 There is a 1-value electrical value difference meter between the disks. In the positive state of the potentiometer, the indication is driving, short step on the unknown terminal button, adjust the potentiometer to zero, C: 4nY/m, then: 1 disk when the value is -1, the disk is set to 10, the positive and negative poles of the current are sent twice, the deviation value is + when the power supply is stopped, and it is negative when it is negative, then; the sum of the 10 small values is equal to one! The difference of the world's potentiometer is asked to drive the integer giant disk, and in the "1 disk self-configuration state, the "island indication" is quietly compared with the remaining disk indication, and the "disk reference appearance group is compared twice with them. The average value of the single polarity reading when the power supply is positive and negative polarity is obtained as above. The fraction is passed through the disk. The first two steps of the fraction are also compared within the disk, that is, with the help of the support potential of the lower (-1) disk 1 indication, the sum of the "disk" small values is compared with the "1 disk 1 indication twice, and the average reading of the former is -1, and the difference between the two situations is calculated in the same way as 3 6.1, but for the sake of distinction, the difference is expressed as 4, and ≤. However, it is a fractional disk that has been compared within the disk, so it is not necessary to select the point between this disk and the next blue point separately. Because the linearity error of the calculation with 1V as the calibration point is not a special position in the comparison of the total goods, the average correction error obtained is not very meaningful, so in order to calculate, we use 1V (1.0186V) as the linearity reference point, so the V indication error is zero. This is also consistent with the usual situation in practice. The relative correction value of the ratio of the indication value to the sum of the indication values of the disk is calculated according to the appendix table! , perform the self-test calculation table in Table 2, first compare the difference between the upper reference standard and the lower reference standard to get the relative difference, L is -4A, if the disk step overvoltage, then -0.1
current, one can use the nuclear power plant to confirm whether it is correct. 37.2 The relative positive value of the sum of the 10 indications of the disk is calculated by removing the 3rd disk gate from the grid. If the value is too acidic, first calculate the relative difference between the 10 indications of the disk during the inter-disk period and the 1-1 value = -1 for the selected voltage, then use Q = 0 (or the reference point of the degree of accuracy) and P- obtained in 37.1, first calculate Q, then calculate ..., that is, in turn calculate each
value without 1 indication and use the quarterly test and +1 indication to get the Q - Q: + P, +
= 1 P- + ,
In the formula: P1 --0.1 >
37.3 Calculation of the linearity performance value
Match: -: ≥ L, with its own relative correction IF =: -Q2, if T, il If the box is of U.5%, the linearity of the Ⅱ disk must be qualified. This is a simple judgment method for the qualified linearity of the disk (some are >0.5C%, ", the linearity of the I disk is not certain), the disk: the indication value is based on the nonlinear correction voltage a- P+!
shares a fraction of the natural group of sub-disks, and a fee! But all use the known user value of the maximum positive degree of the step to replace the person, the disk ticket adds the linear correction voltage
here is the algebraic value, that is, when -1, the step voltage is negative. The above formula can be summarized as: the nonlinear correction stop voltage of the disk indication value itself! Melting: the indication value is the relative positive value of the ratio of the sum of the individual indications and the relative correction value of the 10 indications of the disk, and then the step pressure is added. The sum of 10 indications is equal to the relative stop value of -1 indication and 10 indications. 1 indication -1 (reference, the ratio of -1 indication to the sum of 10 indications is the relative stop value, the sum of 10 indications is equal to the relative difference of 1 indication and +1 indication. The sum of the ...If the internal standard voltage drift exceeds the specified value, the constant current source can be connected to the external calibration standard battery and re-measured. At this time, if the circuit is closed, this indicator is still qualified: but in the calibration certificate, the internal standard voltage must be replaced. 32 When the zero indication value of the electromotive force drift is qualified, the measurement end will be connected to the low-frequency circuit, adjust C4nV/nm, and lower the potentiometer adjustment knob to make the meter zero. Similarly, the number of 10 positive and negative 10 positive ...
33 Preparation before inspection
(center) The self-inspection and self-linearity of the measuring disk are completed by a series of comparisons of each group, including internal comparison and time transition. The method is to connect two windings with the same nominal value in reverse series in the initial short circuit, pass the primary rated current, use the left method to determine the difference in voltage generated on the measuring resistor, and calculate the ratio. See Figure 4 for a schematic diagram. In order to produce the largest possible voltage drop due to the safety difference, the unknown button of the potentiometer should be short-circuited with a clean wire (sheet) at the highest range, and the measured indication should be zero. After the power is turned on and preheated for 2 hours, adjust the galvanometer reverse rotation rate to C: 4nV/mm (when it is under the range of "x10\, it can be adjusted, and the potential difference rate is adjusted again. When the power is stopped, the measured indication value increases to make the galvanometer deflect in the direction of "up" (the reading is greater than the reference voltage at the end of the inspection), and the other direction is "*". And when the power is turned on, the above-mentioned direction remains unchanged, that is, one side of the galvanometer is always "+" and the other side is always "-". The internal comparison of the 34-meter dial
will turn the high-voltage rotary knob counterclockwise to eliminate the manual follow-up. Set the test panel/control switch to 1, for the first test panel: when the indication is 1/2, the 1-0 winding is reversed with the reference potential of the industrial panel, and compared with the test standard, press the highest screen to test the maximum current, and read the double-gauge current meter response number at the positive and negative polarities of the power supply, respectively, ..., then the panel is 1, then the indication is compared with the test standard, and the test current is obtained. The indication of the panel is increased, and the number of test meter deviations is read under each indication. 550
Then set the test switch to the other positions respectively, and compare the reference winding of the service panel with each winding of the panel, and read the number of test meter deviations of each indication as above. The difference between the reference standard and the minimum value is 0. =2 (, Ang-)(v, formula is the measuring disk number: 35 Fractional pressure measurement disk inspection comparison
Fractional side disk (2 electrical difference meter island) that does not share the system group? Individual disk comparison: The fractional pressure disk that can be stepped on only has the largest disk internal comparison. The error of the shunt current does not affect the disk comparison and the results. Their disk comparison results are equal. 35.1 The fractional function disk is equipped with a separate reference winding. It uses the 10 indications of the next disk as a reference standard to compare the values of each indication of the disk. The time of its measurement is one direction, so the filter will be used to transfer the mixed fraction back to the primary circuit, and keep the two numbers equal in the future, so as to maintain the nominal value of the primary magnetic potential as the rate, The measuring/testing switch is in the measuring position. When the value is comfortable, turn the zero adjustment knob to make the galvanometer indicate the correct value. Set the dial to -1 for fine-tuning (there is no -1 indication), and then adjust the potentiometer to zero the galvanometer again. 35.2 The sum of the 10 indications of the next dial is used as the test standard. The values of the previous dial are calibrated by the incremental logic method: the measuring dial, 1-[the dial and the secondary dial are equal to the step value of the dial, and the indication of the second dial is in accordance with the specification in Appendix Table 2. - is set, and when the power is turned off, read the ammeter deviation number a-, - (when the warning mark is set) and, (including the minimum value), the average value is (-) and = (a\, -α), then the difference voltage between the controlled indication and the actual value is -(ara
If the galvanometer cursor deflects to the right significantly, the secondary (or primary) should also increase or decrease the factory minimum step so that the galvanometer basically returns to zero, but this must be outside a value conversion process, that is, 36 disks are passed between two indications.
36.1 There is a 1-value electrical value difference meter between the disks. In the positive state of the potentiometer, the indication is driving, short step on the unknown terminal button, adjust the potentiometer to zero, C: 4nY/m, then: 1 disk when the value is -1, the disk is set to 10, the positive and negative poles of the current are sent twice, the deviation value is + when the power supply is stopped, and it is negative when it is negative, then; the sum of the 10 small values is equal to one! The difference of the world's potentiometer is asked to drive the integer giant disk, and in the "1 disk self-configuration state, the "island indication" is quietly compared with the remaining disk indication, and the "disk reference appearance group is compared twice with them. The average value of the single polarity reading when the power supply is positive and negative polarity is obtained as above. The fraction is passed through the disk. The first two steps of the fraction are also compared within the disk, that is, with the help of the support potential of the lower (-1) disk 1 indication, the sum of the "disk" small values is compared with the "1 disk 1 indication twice, and the average reading of the former is -1, and the difference between the two situations is calculated in the same way as 3 6.1, but for the sake of distinction, the difference is expressed as 4, and ≤. However, it is a fractional disk that has been compared within the disk, so it is not necessary to select the point between this disk and the next blue point separately. Because the linearity error of the calculation with 1V as the calibration point is not a special position in the comparison of the total goods, the average correction error obtained is not very meaningful, so in order to calculate, we use 1V (1.0186V) as the linearity reference point, so the V indication error is zero. This is also consistent with the usual situation in practice. The relative correction value of the ratio of the indication value to the sum of the indication values of the disk is calculated according to the appendix table! , perform the self-test calculation table in Table 2, first compare the difference between the upper reference standard and the lower reference standard to get the relative difference, L is -4A, if the disk step overvoltage, then -0.1
current, one can use the nuclear power plant to confirm whether it is correct. 37.2 The relative positive value of the sum of the 10 indications of the disk is calculated by removing the 3rd disk gate from the grid. If the value is too acidic, first calculate the relative difference between the 10 indications of the disk during the inter-disk period and the 1-1 value = -1 for the selected voltage, then use Q = 0 (or the reference point of the degree of accuracy) and P- obtained in 37.1, first calculate Q, then calculate ..., that is, in turn calculate each
value without 1 indication and use the quarterly test and +1 indication to get the Q - Q: + P, +
= 1 P- + ,
In the formula: P1 --0.1 >
37.3 Calculation of the linearity performance value
Match: -: ≥ L, with its own relative correction IF =: -Q2, if T, il If the box is of U.5%, the linearity of the Ⅱ disk must be qualified. This is a simple judgment method for the qualified linearity of the disk (some are >0.5C%, ", the linearity of the I disk is not certain), the disk: the indication value is based on the nonlinear correction voltage a- P+!
shares a fraction of the natural group of sub-disks, and a fee! But all use the known user value of the maximum positive degree of the step to replace the person, the disk ticket adds the linear correction voltage
here is the algebraic value, that is, when -1, the step voltage is negative. The above formula can be summarized as: the nonlinear correction stop voltage of the disk indication value itself! Melting: the indication value is the relative positive value of the ratio of the sum of the individual indications and the relative correction value of the 10 indications of the disk, and then the step pressure is added. The sum of 10 indications is equal to the relative stop value of -1 indication and 10 indications. 1 indication -1 (reference, the ratio of -1 indication to the sum of 10 indications is the relative stop value, the sum of 10 indications is equal to the relative difference of 1 indication and +1 indication, among which the sum of 10 indications is equal to the relative difference of 1 indication and +1 indication. Other correct formulas are allowed to calculate linearity. This formula is the simplest and most clear. If the data is 552If the internal standard voltage drift exceeds the specified value, the constant current source can be connected to the external calibration standard battery and re-measured. At this time, if the circuit is closed, this indicator is still qualified: but in the calibration certificate, the internal standard voltage must be replaced. 32 When the zero indication value of the electromotive force drift is qualified, the measurement end will be connected to the low-frequency circuit, adjust C4nV/nm, and lower the potentiometer adjustment knob to make the meter zero. Similarly, the number of 10 positive and negative 10 positive ...
33 Preparation before inspection
(center) The self-inspection and self-linearity of the measuring disk are completed by a series of comparisons of each group, including internal comparison and time transition. The method is to connect two windings with the same nominal value in reverse series in the initial short circuit, pass the primary rated current, use the left method to determine the difference in voltage generated on the measuring resistor, and calculate the ratio. See Figure 4 for a schematic diagram. In order to produce the largest possible voltage drop due to the safety difference, the unknown button of the potentiometer should be short-circuited with a clean wire (sheet) at the highest range, and the measured indication should be zero. After the power is turned on and preheated for 2 hours, adjust the galvanometer reverse rotation rate to C: 4nV/mm (when it is under the range of "x10\, it can be adjusted, and the potential difference rate is adjusted again. When the power is stopped, the measured indication value increases to make the galvanometer deflect in the direction of "up" (the reading is greater than the reference voltage at the end of the inspection), and the other direction is "*". And when the power is turned on, the above-mentioned direction remains unchanged, that is, one side of the galvanometer is always "+" and the other side is always "-". The internal comparison of the 34-meter dial
will turn the high-voltage rotary knob counterclockwise to eliminate the manual follow-up. Set the test panel/control switch to 1, for the first test panel: when the indication is 1/2, the 1-0 winding is reversed with the reference potential of the industrial panel, and compared with the test standard, press the highest screen to test the maximum current, and read the double-gauge current meter response number at the positive and negative polarities of the power supply, respectively, ..., then the panel is 1, then the indication is compared with the test standard, and the test current is obtained. The indication of the panel is increased, and the number of test meter deviations is read under each indication. 550
Then set the test switch to the other positions respectively, and compare the reference winding of the service panel with each winding of the panel, and read the number of test meter deviations of each indication as above. The difference between the reference standard and the minimum value is 0. =2 (, Ang-) (v, formula is the number of measuring disks: 35 Fractional pressure measurement disk inspection comparison
Fractional side disk (2 electrical difference meter island) that does not share the system group? Individual disk comparison: The fractional pressure disk that can be stepped on only has the largest disk internal comparison. The error of the shunt current does not affect the disk comparison and the results. Their disk comparison results are equal. 35.1 The fractional function disk is equipped with a separate reference winding. It uses the 10 indications of the next disk as a reference standard to compare the values of each indication of the disk. The time of its production is one direction, so the filter will be used to transfer the mixed fraction back to the primary circuit, and keep the two old numbers equal in the future, so as to maintain the nominal value of the primary magnetic potential as the rate, The measuring/testing switch is in the measuring position. When the value is comfortable, turn the zero adjustment knob to make the galvanometer indicate the correct value. Set the dial to -1 for fine-tuning (there is no -1 indication), and then adjust the potentiometer to zero the galvanometer again. 35.2 The sum of the 10 indications of the next dial is used as the test standard. The values of the previous dial are calibrated by the incremental logic method: the measuring dial, 1-[the dial and the secondary dial are equal to the step value of the dial, and the indication of the second dial is in accordance with the specification in Appendix Table 2. - is set, and when the power is turned off, read the ammeter deviation number a-, - (when the warning mark is set) and, (including the minimum value), the average value is (-) and = (a\, -α), then the difference voltage between the controlled indication and the actual value is -(ara
If the galvanometer cursor deflects to the right significantly, the secondary (or primary) should also increase or decrease the factory minimum step so that the galvanometer basically returns to zero, but this must be outside a value conversion process, that is, 36 disks are passed between two indications.
36.1 There is a 1-value electrical value difference meter between the disks. In the positive state of the potentiometer, the indication is driving, short step on the unknown terminal button, adjust the potentiometer to zero, C: 4nY/m, then: 1 disk when the value is -1, the disk is set to 10, the positive and negative poles of the current are sent twice, the deviation value is + when the power supply is stopped, and it is negative when it is negative, then; the sum of the 10 small values is equal to one! The difference of the world's potentiometer is asked to drive the integer giant disk, and in the "1 disk self-configuration state, the "island indication" is quietly compared with the remaining disk indication, and the "disk reference appearance group is compared twice with them. The average value of the single polarity reading when the power supply is positive and negative polarity is obtained as above. The fraction is passed through the disk. The first two steps of the fraction are also compared within the disk, that is, with the help of the support potential of the lower (-1) disk 1 indication, the sum of the "disk" small values is compared with the "1 disk 1 indication twice, and the average reading of the former is -1, and the difference between the two situations is calculated in the same way as 3 6.1, but for the sake of distinction, the difference is expressed as 4, and ≤. However, it is a fractional disk that has been compared within the disk, so it is not necessary to select the point between this disk and the next blue point separately. Because the linearity error of the calculation with 1V as the calibration point is not a special position in the comparison of the total goods, the average correction error obtained is not very meaningful, so in order to calculate, we use 1V (1.0186V) as the linearity reference point, so the V indication error is zero. This is also consistent with the usual situation in practice. The relative correction value of the ratio of the indication value to the sum of the indication values of the disk is calculated according to the appendix table! , perform the self-test calculation table in Table 2, first compare the difference between the upper reference standard and the lower reference standard to get the relative difference, L is -4A, if the disk step overvoltage, then -0.1bzxZ.net
current, one can use the nuclear power plant to confirm whether it is correct. 37.2 The relative positive value of the sum of the 10 indications of the disk is calculated by removing the 3rd disk gate from the grid. If the value is too acidic, first calculate the relative difference between the 10 indications of the disk during the inter-disk period and the 1-1 value = -1 for the selected voltage, then use Q = 0 (or the reference point of the degree of accuracy) and P- obtained in 37.1, first calculate Q, then calculate ..., that is, in turn calculate each
value without 1 indication and use the quarterly test and +1 indication to get the Q - Q: + P, +
= 1 P- + ,
In the formula: P1 --0.1 >
37.3 Calculation of the linearity performance value
Match: -: ≥ L, with its own relative correction IF =: -Q2, if T, il If the box is of U.5%, the linearity of the Ⅱ disk must be qualified. This is a simple judgment method for the qualified linearity of the disk (some are >0.5C%, ", the linearity of the I disk is not certain), the disk: the indication value is based on the nonlinear correction voltage a- P+!
shares a fraction of the natural group of sub-disks, and a fee! But all use the known user value of the maximum positive degree of the step to replace the person, the disk ticket adds the linear correction voltage
here is the algebraic value, that is, when -1, the step voltage is negative. The above formula can be summarized as: the nonlinear correction stop voltage of the disk indication value itself! Melting: the indication value is the relative positive value of the ratio of the sum of the individual indications and the relative correction value of the 10 indications of the disk, and then the step pressure is added. The sum of 10 indications is equal to the relative stop value of -1 indication and 10 indications. 1 indication -1 (reference, the ratio of -1 indication to the sum of 10 indications is the relative stop value, the sum of 10 indications is equal to the relative difference of 1 indication and +1 indication. The sum of the ...If you let the data 552If you let the data 552The left method of measuring the voltage drop is used to measure the voltage drop and calculate the ratio. The schematic diagram is shown in Figure 4. In order to produce the largest possible voltage drop due to the difference in voltage, the unknown button of the potentiometer should be short-circuited with a clean wire (sheet) at the highest range. The measured micro-indication is zero. After the power is turned on and preheated for 2 hours, the anti-rotation crown of the galvanometer is adjusted to C: 4nV/mm (when it is under the range of "x10\, it can be adjusted again. The potential difference rate is set, and the power is stopped. The measured value increases to make the direction of the galvanometer deflection "up" (the reading value is greater than the reference voltage at the end of the inspection), and the other direction is "-". When the power is turned on, the above-mentioned direction remains unchanged, that is, one side of the galvanometer is always "+" and the other side is always "-". The internal comparison of the 34-digit measuring disk
will turn the high-voltage rotary knob counterclockwise to eliminate the manual follow-up. Set the test panel/control switch to 1, for the first test panel: when the indication is 1/2, the 1-0 winding is reversed with the reference potential of the industrial panel, and compared with the test standard, press the highest screen to test the maximum current, and read the double-gauge current meter response number at the positive and negative polarities of the power supply, respectively, ..., then the panel is 1, then the indication is compared with the test standard, and the test current is obtained. The indication of the panel is increased, and the number of test meter deviations is read under each indication. 550
Then set the test switch to the other positions respectively, and compare the reference winding of the service panel with each winding of the panel, and read the number of test meter deviations of each indication as above. The difference between the reference standard and the minimum value is 0. =2 (, Ang-)(v, formula is the measuring disk number: 35 Fractional pressure measurement disk inspection comparison
Fractional side disk (2 electrical difference meter island) that does not share the system group? Individual disk comparison: The fractional pressure disk that can be stepped on only has the largest disk internal comparison. The error of the shunt current does not affect the disk comparison and the results. Their disk comparison results are equal. 35.1 The fractional function disk is equipped with a separate reference winding. It uses the 10 indications of the next disk as a reference standard to compare the values of each indication of the disk. The time of its measurement is one direction, so the filter will be used to transfer the mixed fraction back to the primary circuit, and keep the two numbers equal in the future, so as to maintain the nominal value of the primary magnetic potential as the rate, The measuring/testing switch is in the measuring position. When the value is comfortable, turn the zero adjustment knob to make the galvanometer indicate the correct value. Set the dial to -1 for fine-tuning (there is no -1 indication), and then adjust the potentiometer to zero the galvanometer again. 35.2 The sum of the 10 indications of the next dial is used as the test standard. The values of the previous dial are calibrated by the incremental logic method: the measuring dial, 1-[the dial and the secondary dial are equal to the step value of the dial, and the indication of the second dial is in accordance with the specification in Appendix Table 2. - is set, and when the power is turned off, read the ammeter deviation number a-, - (when the warning mark is set) and, (including the minimum value), the average value is (-) and = (a\, -α), then the difference voltage between the controlled indication and the actual value is -(ara
If the galvanometer cursor deflects to the right significantly, the secondary (or primary) should also increase or decrease the factory minimum step so that the galvanometer basically returns to zero, but this must be outside a value conversion process, that is, 36 disks are passed between two indications.
36.1 There is a 1-value electrical value difference meter between the disks. In the positive state of the potentiometer, the indication is driving, short step on the unknown terminal button, adjust the potentiometer to zero, C: 4nY/m, then: 1 disk when the value is -1, the disk is set to 10, the positive and negative poles of the current are sent twice, the deviation value is + when the power supply is stopped, and it is negative when it is negative, then; the sum of the 10 small values is equal to one! The difference of the world's potentiometer is asked to drive the integer giant disk, and in the "1 disk self-configuration state, the "island indication" is quietly compared with the remaining disk indication, and the "disk reference appearance group is compared twice with them. The average value of the single polarity reading when the power supply is positive and negative polarity is obtained as above. The fraction is passed through the disk. The first two steps of the fraction are also compared within the disk, that is, with the help of the support potential of the lower (-1) disk 1 indication, the sum of the "disk" small values is compared with the "1 disk 1 indication twice, and the average reading of the former is -1, and the difference between the two situations is calculated in the same way as 3 6.1, but for the sake of distinction, the difference is expressed as 4, and ≤. However, it is a fractional disk that has been compared within the disk, so it is not necessary to select the point between this disk and the next blue point separately. Because the linearity error of the calculation with 1V as the calibration point is not a special position in the comparison of the total goods, the average correction error obtained is not very meaningful, so in order to calculate, we use 1V (1.0186V) as the linearity reference point, so the V indication error is zero. This is also consistent with the usual situation in practice. The relative correction value of the ratio of the indication value to the sum of the indication values of the disk is calculated according to the appendix table! , perform the self-test calculation table in Table 2, first compare the difference between the upper reference standard and the lower reference standard to get the relative difference, L is -4A, if the disk step overvoltage, then -0.1
current, one can use the nuclear power plant to confirm whether it is correct. 37.2 The relative positive value of the sum of the 10 indications of the disk is calculated by removing the 3rd disk gate from the grid. If the value is too acidic, first calculate the relative difference between the 10 indications of the disk during the inter-disk period and the 1-1 value = -1 for the selected voltage, then use Q = 0 (or the reference point of the degree of accuracy) and P- obtained in 37.1, first calculate Q, then calculate ..., that is, in turn calculate each
value without 1 indication and use the quarterly test and +1 indication to get the Q - Q: + P, +
= 1 P- + ,
In the formula: P1 --0.1 >
37.3 Calculation of the linearity performance value
Match: -: ≥ L, with its own relative correction IF =: -Q2, if T, il If the box is of U.5%, the linearity of the Ⅱ disk must be qualified. This is a simple judgment method for the qualified linearity of the disk (some are >0.5C%, ", the linearity of the I disk is not certain), the disk: the indication value is based on the nonlinear correction voltage a- P+!
shares a fraction of the natural group of sub-disks, and a fee! But all use the known user value of the maximum positive degree of the step to replace the person, the disk ticket adds the linear correction voltage
here is the algebraic value, that is, when -1, the step voltage is negative. The above formula can be summarized as: the nonlinear correction stop voltage of the disk indication value itself! Melting: the indication value is the relative positive value of the ratio of the sum of the individual indications and the relative correction value of the 10 indications of the disk, and then the step pressure is added. The sum of 10 indications is equal to the relative stop value of -1 indication and 10 indications. 1 indication -1 (reference, the ratio of -1 indication to the sum of 10 indications is the relative stop value, the sum of 10 indications is equal to the relative difference of 1 indication and +1 indication. The sum of the ...The left method of measuring the voltage drop is used to measure the voltage drop and calculate the ratio. The schematic diagram is shown in Figure 4. In order to produce the largest possible voltage drop due to the difference in voltage, the unknown button of the potentiometer should be short-circuited with a clean wire (sheet) at the highest range. The measured micro-indication is zero. After the power is turned on and preheated for 2 hours, the anti-rotation crown of the galvanometer is adjusted to C: 4nV/mm (when it is under the range of "x10\, it can be adjusted again. The potential difference rate is set, and the power is stopped. The measured value increases to make the direction of the galvanometer deflection "up" (the reading value is greater than the reference voltage at the end of the inspection), and the other direction is "-". When the power is turned on, the above-mentioned direction remains unchanged, that is, one side of the galvanometer is always "+" and the other side is always "-". The internal comparison of the 34-digit measuring disk
will turn the high-voltage rotary knob counterclockwise to eliminate the manual follow-up. Set the test panel/control switch to 1, for the first test panel: when the indication is 1/2, the 1-0 winding is reversed with the reference potential of the industrial panel, and compared with the test standard, press the highest screen to test the maximum current, and read the double-gauge current meter response number at the positive and negative polarities of the power supply, respectively, ..., then the panel is 1, then the indication is compared with the test standard, and the test current is obtained. The indication of the panel is increased, and the number of test meter deviations is read under each indication. 550
Then set the test switch to the other positions respectively, and compare the reference winding of the service panel with each winding of the panel, and read the number of test meter deviations of each indication as above. The difference between the reference standard and the minimum value is 0. =2 (, Ang-)(v, formula is the measuring disk number: 35 Fractional pressure measurement disk inspection comparison
Fractional side disk (2 electrical difference meter island) that does not share the system group? Individual disk comparison: The fractional pressure disk that can be stepped on only has the largest disk internal comparison. The error of the shunt current does not affect the disk comparison and the results. Their disk comparison results are equal. 35.1 The fractional function disk is equipped with a separate reference winding. It uses the 10 indications of the next disk as a reference standard to compare the values of each indication of the disk. The time of its measurement is one direction, so the filter will be used to transfer the mixed fraction back to the primary circuit, and keep the two numbers equal in the future, so as to maintain the nominal value of the primary magnetic potential as the rate, The measuring/testing switch is in the measuring position. When the value is comfortable, turn the zero adjustment knob to make the galvanometer indicate the correct value. Set the dial to -1 for fine-tuning (there is no -1 indication), and then adjust the potentiometer to zero the galvanometer again. 35.2 The sum of the 10 indications of the next dial is used as the test standard. The values of the previous dial are calibrated by the incremental logic method: the measuring dial, 1-[the dial and the secondary dial are equal to the step value of the dial, and the indication of the second dial is in accordance with the specification in Appendix Table 2. - is set, and when the power is turned off, read the ammeter deviation number a-, - (when the warning mark is set) and, (including the minimum value), the average value is (-) and = (a\, -α), then the difference voltage between the controlled indication and the actual value is -(ara
If the galvanometer cursor deflects to the right significantly, the secondary (or primary) should also increase or decrease the factory minimum step so that the galvanometer basically returns to zero, but this must be outside a value conversion process, that is, 36 disks are passed between two indications.
36.1 There is a 1-value electrical value difference meter between the disks. In the positive state of the potentiometer, the indication is driving, short step on the unknown terminal button, adjust the potentiometer to zero, C: 4nY/m, then: 1 disk when the value is -1, the disk is set to 10, the positive and negative poles of the current are sent twice, the deviation value is + when the power supply is stopped, and it is negative when it is negative, then; the sum of the 10 small values is equal to one! The difference of the world's potentiometer is asked to drive the integer giant disk, and in the "1 disk self-configuration state, the "island indication" is quietly compared with the remaining disk indication, and the "disk reference appearance group is compared twice with them. The average value of the single polarity reading when the power supply is positive and negative polarity is obtained as above. The fraction is passed through the disk. The first two steps of the fraction are also compared within the disk, that is, with the help of the support potential of the lower (-1) disk 1 indication, the sum of the "disk"
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