Verification Regulation of Moving Coil Indicators and Step -indication Controllers Associated for Measuring Temperature
Some standard content:
Moving coil temperature
Indicating position adjustment
Verification regulations
JJG 186—1997
Dynamic temperature indicating
Indicating position adjustment
.........
FermentationRegnletiou of Mmving f'nilTndicalnrs and Step-indication Contrullers:Axaciulld Fur Measuring T'cnpralneJ.IG:1861997
：186-
J.IG:IN7—19m
++ +++++.
This verification regulation has been approved by the National Technical Commission in 1597 Sichuan H 2.4 and issued in 1998 [5H 01H Implementation unit: Shanghai Xinji Technical Bureau
Drafting unit: Shanghai Measurement and Testing Technology Research Institute The technical provisions of this regulation are the product units responsible for the interpretation of this regulation. The main drafters:
Lu Xing (Shanghai Measurement and Testing Technology Research Institute) Zhu Jialiang (Shanghai Metrology and Testing Technology Research Institute! 432
Overview·
Technical requirements
Inspection affairs
Four inspection items and verification methods
Five handling of inspection results
Appendix Appendix [Verification method for indicating electric power, dynamic switching town mutual transmission technical requirements? Name adjustment stock definition...
Resistant record? Verification of thermoelectric instruments should be made of direct current shirt Appendix 4 Dynamic accuracy indicating instrument verification record format Yin record 5 Dynamic temperature indication, position adjustment instrument verification record format (adjustment part) 934
Dynamic temperature
Table verification procedures
Indicating position adjustment
Not applicable to thermoelectric adjustment, thermal resistance used in conjunction with the new manufacturing, immortals in the repair It is suitable for the calibration of magnetic field-based dynamic reading and position indicating meters (hereinafter referred to as meters), and is also suitable for the calibration of other dynamic meters that convert physical parameters into voltage (density) or electrical power rate and conduction, including direct action and dynamic indicating and regulating meters with preamplifier.
First description
This meter is widely used in industrial process measurement and control systems. It is an analog simple meter that can be used to measure and control physical parameters such as humidity, pressure, etc.
Indicating and regulating meters are a type of meter The measuring mechanism, measuring circuit and electronic adjustment components are as follows: When the detection element sensor converts the measured image into a corresponding electrical signal, the current is controlled by the measuring circuit and charged into the current by the spring (or hairspring). When the current is balanced, the measuring pointer on the measuring instrument indicates the value of the measured parameter on the engraved or plate: II Technical requirements
1 Appearance
1.1 The scale of the instrument shall indicate the model, specification, manufacturer (or trade name), factory number, production date and accuracy, etc. The manufacturing license mark and number of the instrument shall also be indicated. 1.2) The instrument shall not have defects that cause large measurement errors and make the internal components susceptible to damage. 1.3 The modified and upgraded scales shall comply with the relevant standards. 1.4 The zero adjustment device shall make the pointer start from the starting point of the scale line not less than 2% of the scale length (filled, 11% (), the instrument with preamplifier is the standard double arc length! 1%: 1.5 The pointer should be smooth during movement without any phenomenon such as stuck, moving, reaching, etc. 1.6 Set the pointer (or set value)
1.G1 The meter with dual detection function, set the pointer (or set value) The quantity can be set on any scale line.
1.6,2 There are three-position [interval band] settings. The upper limit setting pointer (or upper limit setting value) can be set on any scale line of (10-100)% of the scale. The lower limit setting pointer (or lower limit setting value) can be set on the whole scale line of (non-90)% of the scale. The middle band should be able to be adjusted to within 2% of the arc length of the scale. Within the scale (10-0% range 1: The value is greater than the scale length. 0%
The middle band refers to the distance between the upper and lower limit setting pointer positions (or 1, "limit setting"). 1.6.3 For slow dials with three-position (wide middle band) push-type action, the upper limit setting (or 1. Limit setting) can be set to any scale line of (10-100)% of the scale; the lower limit setting pointer or the lower limit setting value should be able to be set on any scale line of -90% of the scale. The minimum middle band should be within 5 of the arc length of the scale. Scale (-9% range domestic: the maximum should be adjusted to 100% of the scale length. 2 Indication basic error
only the indication basic error of the meter: 1.0 level does not exceed 1.4% of the instrument range: 1.5 level does not exceed only the meter 93-1
3 Return error
The instrument's body adjustment does not exceed half of the basic error of the meter's indication: 4 Russian oblique error
The instrument is set at any time between the following At the angle, the lower limit of the meter is checked and the amount of change or the indication value change does not exceed the absolute value of the basic error of the instrument indication. The dynamic limit of the instrument is 5 degrees. The actual inclination of the meter is 10°5. The setting point code difference
is set to the meter's effective point phase: 1.0 level is not over the meter range +】0%: 1.5 level dust-proof factory specified switching difference
reported special switching difference, 1.0 value does not exceed the + gate point in the quality range .5%: 1.5 nuclear power plant standard. 7 Over-limit
The pointer is more sensitive than the scale length. Except for the instrument with preamplifier,
Cut-off protection
Only protect some instruments. When the thermocouple is clear: the indicator should be able to scale the scale element above the scale line. 9 The mutual influence between the switching values
is a one-way action instrument. The middle range should be adjusted to the lower limit. The provisions of the standard weak total length, the actual change between the light into the state of the perceptible state:
the middle of the meter is not greater than 2% of the standard sheet; the meter has a wide middle band should not be more than 5% of the scale length: foil continuity group
when the environment group disk is (15-35), the analysis of the degree of (45-75)%, according to the meter terminals between the insulation resistance is not less than the following value:
the input editor is usually a grounding neutrino 40M0| |tt||Input terminal—power supply terminal 3,
Output terminal—input terminal 2M0
Output terminal—power supply terminal 201
Reduction slip,—ground terminal 20
11 Shrinkage strength
When the ambient temperature is (15-35), the relative humidity is (4.5.-75) when recording, the instrument is widely used in the following test voltage, voltage [11. There is a breakdown or flying phenomenon, the input terminal is connected! V
Yuren end - power supply Rui 131K1V
shan end - ground chrysanthemum
wheel output end: - input end 1500V
Yushan Rui factory - power supply electronic
power supply, one ground garden electronic
12 damping time
Assume that my relative does not exceed the following excitation value:
12.1Lu presses the action trap to use the instrument
spring or the range is less than 20mV meter
other meters|| tt||12.3 The resistance of the amplifier before receiving the test shall not be less than the specified value:
13 The resistance of the internal circle and the matching meter shall not be less than the specified value:
14 Calibration equipment
14.1 The calibration equipment shall have the following equipment:
The required standard is required for the device to be tested. See Table 2. The new set of calibration equipment shall not exceed one tenth of the error allowed by the meter being tested
The white current shall not exceed one tenth of the error allowed by the meter being tested |tt||Mathematical voltage clothing
(for river pressure!
There is a current box
External seven resistance
Work test instrument
Exchange wasteland silver music product
Standard potential standard
Position is not to come
Great second than the heart.05 theory
Should be with 0.05 level when
Long fixed configuration with dynamic diagram point
This special standard chemical
With the vertical current low also affected by the power generation
7 5V limit impedance is less than 5, the teaching car electric note is equipped with 20 real positions, the total position is real, the fixed position, 5 for example: (1.20, each detection difference between the fire T0.0:
night is not more than 0. Small
format: [500
to use: YM
measurement retreat: ±%
, low
interference::- 1v
220v1kw
Fixed width: 1%
Gas distribution total power limit monthly dynamic rule
Standard instrument
Calibration A thermoelectric system dynamic diagram instrument:
Inspection core distribution thermal resistance door real picture collection
Agricultural seat training
Creation moment decision you
Fan visual electricity
To the ground and other scales
Also use the system's maximum degree and your own length
current pressure limit
Resistance trademark single wind support insurance
14.2 Inspection timing failure Working conditions 14.2.1 Ambient intensity (2 non-51), relative humidity (45~75)% 14.2.2 AC rated value 230V rated value 11%; rated frequency 5011z. Yuan can be less than -1%: 14.2.3 Except for the average of each field, there is no need to put the meter in the specified working position without automatic choking. The meter must be placed in the specified water half working position. The calibration items and calibration methods of the meter are shown in Table 3. Item
Model over-inflammation
Flower station
This error
Wu at point
Standard: The natural power grid is handed over to the object of "period low protection". The dynamic instrument with a door for thermal and electrical distribution is long and wide. The "—" should be specified, "
16 Appearance inspection
Use measurement to make inspection changes (except 1.5):
17 Refers to the basic course difference inspection
Verification standard instruments, equipment and meters are divided into: 1, rate 2 and Figure 3 for connection Line, rise adjustment instrument mechanical also 1 distribution potential electric use dynamic diagram certificate
thin indication, indication position adjustment Yue
1 one point (this [2 one external and purpose,:
3—limit three management voltage main network:
(or k)
4 flow energy in the fixed water meter teaching car inside the table
Figure 2 thermal inquiry, dynamic surrounding big benefit in
situation indication, indication position test adjustment instrument
1 one temporary cavity real table; 2 external connection 4 use:
group quality standard indication, indication position military adjustment special
1 - Cut-off inspection of chemical meter: 2-flow outlet;
17.2 The power supply of the meter and the equipment should be replaced with the power supply preheating, preheating inquiry -5m, pay
not good cattle production factory other right meeting, pay
according to cattle production! Just complete the time
17.3 Change the input signal, the chemical meter slowly changes to the upper limit scale number: the mountain drops to the lower scale number, so that the second cycle is carried out, the needle will move to the point of 1.5 hydrogen.
17.4 The method of selection
verification should be carried out on the half-minute line, the verification point is only 1, the lower limit (or stop near % Within the range! Within the range, at 17.5, increase the signal, and slowly open the increase needle: and read the minimum value of the standard instrument: Qiu is the actual current of each moment and the corresponding point in the upper limit value of the puncture line before reading the upper limit value of the puncture line, and the small finger signal: the fast pointer is half stable F, and the product is only a single line of inspection, and read the standard receiver's indication, which is the actual current corresponding to each moment and the inspected moment in the lower limit value of the puncture line.
17.7 on the upper and lower tables, the lower indication error is 4, 2.1 formula (1), (2) calculation: 241. -4 -4
A4:-4-4T
Formula: 24, 2A only the upper and lower lines of the meter indicate the basic error mV,): A--the special disk value of the scale line (mV.2)F the actual sequence of electricity in the point of the scale line is estimated V: 2A.A-
17.8 After calculation, if the meter indicates the basic error exceeds the tolerance, during arbitration verification, the methods of 17.5 and 17.6 must be repeated, and at least 3 cycles of verification must be performed. According to the reading values of the upper and lower travels on each of the tested scale lines 3 times (for the upper limit line, only the upper travel electricity is read, and for the lower limit line, only the lower travel electricity is read), the basic error of the indicator is calculated, and the reproducibility of the instrument indication value must be pre-tested (the technical requirements and verification methods for the indication change are shown in Appendix 1). 18 The return error of the return error item
and the indication error are tested simultaneously, and the error is calculated according to formula (3): A1)=IA. -A-
Formula: 2A-I meter error (mV, A
41, A meaning formula (!), [2) plus three times, F tax start time, that is, the 3 times upper and lower effective readings The average value (rV, Q)Www.bzxZ.net
19 tilt error
[9.1 The calibration should be carried out at the limit value and lower limit mark. For the meter with a forward and backward position, it can be carried out at points near 10% and 90% of my annual value,
19,2 The instrument is tilted at 4 angles according to the regulations, namely, left, right, left, and right, and is calibrated according to the method of basic error of the calibration indication, and compared with the normal working position, the downhill value and the change value of the electrical or program or the change of the indication value are calculated respectively.
20 Verification of set point difference
20.1 The verification is carried out on the scale line close to 10%, 50%, 50%, 90% of the scale sheet, and the specified scale load can also be verified according to the requirements of the inspection position.
20.2 At each micro-scale increment, a cycle of verification is carried out. 20.3 Move the set pointer (or set value) to the center of the detected line, input the signal: make the indicator pointer close to the set pointer (or set value), the relay action output terminal changes: the measured standard instrument reading is the upper touch value A1
20.4 "Continue to input the signal, make the indicator pointer 1 alarm continue 1 recommendation (2-3m, then input the signal again, make the indicator pointer pass the set pointer (or set value), when the output terminal of the device changes, the value on the standard instrument is the lower change value A2
20.5 Based on the upper and lower switching ratios (4), calculate the switching median value 1: -4,14:
Formula 4: A—Switching median value (V,):
A, A\-standard instrument The upper and lower cut-off values (V,) read are 20.6 The set point deviation is calculated by formula (5): ZA = A..
Where: aA——fixed point deviation (mv, 1A) Use formula (4).
and F have the same meaning as (1) and (2).
20.7 After measurement, if the set point difference of the instrument exceeds the tolerance or needs to be calibrated, it must be repeated by the methods of 20.3 and 20.4, and at least 3 cycles of calibration must be performed. The average value of the 1st switching value and the lower switching value is the median of the average value of the 3 switching values. At the same time, the repeatability of the switching value must be evaluated (the technical requirements and calibration methods of the switching value are shown in Appendix! 21 Verification of switching difference
The calibration width of the switching value is carried out simultaneously with the calibration of the instrument fixed point deviation, and the calibration is calculated by formula (6): ZA =I(AA2)(ALAT)
where: A—cut difference mV,];
A1A has the same meaning as formula (4)
A has the same meaning as formula (1), (,
If three up and down stroke tests are performed, AT, A, A,, A, are the average values of the three up and down stroke tests (mV. n).
22 Over-limit verification
For the instrument with opposite action, place the setting pointer in any position within the range of 15-95% of the scale length, so that the indicating finger is close to the setting pointer. After the relay is activated, continue to move the indicating finger until it is stopped. In this process, the electrical appliance cannot have two moving parts. At this time, use the H force to observe the distance between the small pointer and the setting pointer. 23 Broken couple protection
Move the setting push needle (according to the agreed value) to the upper limit scale line of the scale, adjust the output of the two pressure boxes, keep the small pointer at 50% of the scale length, and then use the receiving meter input to observe the broken couple protection function of the instrument. 24 Mutual influence between the switching values
When the switching values of the two pairs are incomprehensible: 45
24.1,1. The influence of the upper limit setting pointer on the lower limit setting Set the small setting pointer (lower limit setting value) at S0% of the rated value, and make the indicator needle close to the upper limit setting pointer (or the lower setting value), and then start the relay. The upper limit setting pointer (or the upper limit setting value) moves close to the lower limit setting pointer (or the lower setting value). The distance between the two limits should not affect the relay operation within the specified period.
4, 2 Use the same method to set the lower limit setting pointer (or the lower limit). The upper limit setting pointer (or the upper limit setting value) should not be affected by the relay operation within the specified period. (Three methods are used to measure the insulation resistance. During the test, disconnect the power supply of each circuit. The insulation resistance test is carried out according to the provisions of Article 11 of the Safety Safety Law:
26. Disconnect the power supply of each circuit during the test. The terminal points are sparse. According to the provisions of Article 11, measure retrograde on the voltage tester (use a voltage tester with alarm current, the setting can be selected at 5A, except for special requirements). The test voltage rises sequentially to the specified value and maintains Im.n. There should be no high penetration or sudden drop in the test voltage. Cut off the power supply,
27 Determination of damping time
Change the whole signal to make the indicating pointer move to a certain scale line of the main part, cut off the power supply, make the first needle return to the limit line, and then connect the test power supply, start the meter at
, when the pointer moves within the scale line within 1.5% of the scale length, stop timing, and its value is the damping time,
28 The limit value
1 again low voltage differential or effective voltage: can be practiced
standard collection; one you are accurate: one continent hill all
V2, Vaa, piece connected to the following formula to calculate the table R city K
formula: R day, receiving table, (:
R international standard resistance (α):
V.2- measured voltage across the standard circuit (mVi: V3- measured instrument carbon test. The voltage value at the human end (nv). Use the compensation method to measure, and the connection is residual! ||t t||South 1 flow indicator.
Teacher section pressure box output: Make the pointer stay
Any-he accepts, and leads
V. Handling of verification results
2 The qualified instrument shall be sealed and issued with a verification certificate: The unqualified instrument shall be issued with a verification result notice. 30 The verification cycle of the instrument shall be determined according to the use situation, but shall not exceed 1 year: 94
Appendix 1
Technical requirements and verification methods for indication accuracy and switching accuracy 1. Indication accuracy
1.1 Technical requirements: For instruments with accuracy level 1.5, the accuracy of the indication should exceed 0.4% of the instrument range. 1.2 Verification method
1 . The instrument value accuracy and indication basic error are verified at the same time. 1.2, 2.2.8. Get the readings of each test agent for the three up and down strokes respectively, take the maximum difference between them, and take 1 as the instrument indication sensitivity or sensitivity, Z switching value repeatability
2.1 Technical requirements: For the instrument with accuracy level 1.0, the repeatability of the switching value should not exceed 1.3% of the instrument's range.
2.2 Verification method
2.2.1 The instrument switching value is verified at the same time with the set point, 2.2.2. Get the switching scale line by the stop 20.7! Take the maximum difference between the three up and down stroke readings in the next 7 strokes, and take 1 as the repeatability of the instrument switching value. 2
Terms and Definitions
1 Error
The absolute position difference between the measured values on the measuring instrument under normal conditions, also known as "post-screening error" or "variable error" 2 Repeatability of indication
The result of repeated measurements of the same measured value under normal conditions without changing the measurement.
3 Skew error
The change in the indication caused by the tilt of the measuring instrument with its normal working position and the influence of the installation position. 4 Set point deviation
is the deviation of the output channel under the current decision condition, 5 Switching value
when the input variable changes, the input variable value of the change box changes by the upper switching value
auxiliary variable increases, the lower switching value
when the variable decreases, the input variable value of the output variable changes by the switching difference
the difference between the upper switching value and the lower switching value.
9 Switching value property
is the switching value property, under the same conditions, the maximum difference between the two switching values measured for consecutive times.
Appendix 3
The test result is that the direct current electric current used for the heating element should be selected
- 3! : + 51.
- n - + Im
56 -- 0
0--150
5: 10
5G - - 0
u- 200
20C40G
10 - - (
20h: --5n
0- 300
200-500
- 1.51 - - 1.5'H
0 -50:
0 - Hx
7 models are respectively obtained by switching the scale line! The maximum difference between the switching values is taken as the switching value, and the repeatability of the switching value is taken as the switching value of the instrument. 2
Terms and definitions
1 Error
Under the condition of the current, the meter only works in the normal area, and the absolute position of the difference between the measured values on the indication point is also called "post-screening error" or "variable error" 2 Repeatability of indication
Under the condition of measuring and the policy is not changed, the same measured value is measured for many times, and the results are too different.
3 Skew error
Due to the change of the indication caused by the tilt of the instrument with its normal working position, the influence of the installation position. 4 Set point deviation
is the deviation of the output channel under the current decision condition, 5 Switching value
when the input variable changes, the input variable value of the change box changes by the upper switching value
auxiliary variable increases, the lower switching value
when the variable decreases, the input variable value of the output variable changes by the switching difference
the difference between the upper switching value and the lower switching value.
9 Switching value property
is the switching value property, under the same conditions, the maximum difference between the two switching values measured for consecutive times.
Appendix 3
The test result is that the direct current electric current used for the heating element should be selected
- 3! : + 51.
- n - + Im
56 -- 0
0--150
5: 10
5G - - 0
u- 200
20C40G
10 - - (
20h: --5n
0- 300
200-500
- 1.51 - - 1.5'H
0 -50:
0 - Hx
7 models are respectively obtained by switching the scale line! The maximum difference between the switching values is taken as the switching value, and the repeatability of the switching value is taken as the switching value of the instrument. 2
Terms and definitions
1 Error
Under the condition of the current, the meter only works in the normal area, and the absolute position of the difference between the measured values on the indication point is also called "post-screening error" or "variable error" 2 Repeatability of indication
Under the condition of measuring and the policy is not changed, the same measured value is measured for many times, and the results are too different.
3 Skew error
Due to the change of the indication caused by the tilt of the instrument with its normal working position, the influence of the installation position. 4 Set point deviation
is the deviation of the output channel under the current decision condition, 5 Switching value
when the input variable changes, the input variable value of the change box changes by the upper switching value
auxiliary variable increases, the lower switching value
when the variable decreases, the input variable value of the output variable changes by the switching difference
the difference between the upper switching value and the lower switching value.
9 Switching value property
is the switching value property, under the same conditions, the maximum difference between the two switching values measured for consecutive times.
Appendix 3
The test result is that the direct current electric current used for the heating element should be selected
- 3! : + 51.
- n - + Im
56 -- 0
0--150
5: 10
5G - - 0
u- 200
20C40G
10 - - (
20h: --5n
0- 300
200-500
- 1.51 - - 1.5'H
0 -50:
0 - Hx
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