Verification Regulation of Standard Dual Piston Type Pressurevacuum Gauge (Grade Ⅱ＆Ⅲ)
Some standard content:
Second, second-class standard double piston type pressure vacuum gauge verification regulations JJG159-1994 Second, third-class standard double active pressure vacuum gauge verification regulations VerlficatilonRequlatkon otStandardDualPistonTypePressurevaeuum Gauge (Grade I & Ⅱ]JJG 159--1994 Main parts G 155 1975 This verification procedure was approved by the State Technical Commission on April 5, 2004. From December 15, 2004, the responsible unit is: - National Institute of Metrology. Drafting unit: Indian Institute of Metrology. The drafting unit of the technical provisions of this regulation is also: The main drafter of this regulation: Luo Lai (Institute of Metrology and Space Science, East Province) Metrology Science and Technology Research Institute)
Technical requirements
Verification conditions
Verification items and methods
Verification result processing and calibration period
Record 1
Three, three-class standard double-acting cold type pressure gauge verification record 2
Verification certificate cover format
Appendix 3 Ningguo major cities power acceleration
, three-class standard This procedure is applicable to newly manufactured and repaired double-plug pressure vacuum gauges. The pressure is within 1.1-0.25MP. The first-class (price.2 grade) standard live weight F square vacuum gauge (the instrument is named after the commercial instrument 1. The structure of the instrument is the principle of balance between the force on the live chamber and the force caused by the flash rate: the gold force measurement is carried out according to the principle of balance between the force on the live chamber and the force caused by the flash rate. Pressure tester is used for the transfer, verification and testing of force value. Technical requirements: 1. The accuracy level and technical error of the instrument are shown in Table 1. The purity of the instrument is the same as that of the pressure tester. 2. The pressure tester is used for the transfer, verification and testing of force value. Technical requirements: 1. The accuracy level and technical error of the instrument are shown in Table 1. The purity of the instrument is the same as that of the pressure tester. 3. The pressure tester is used for the transfer, verification and testing of force value. Technical requirements: 1. The accuracy level and technical error of the instrument are shown in Table 1. The purity of the instrument is the same as that of the pressure tester. 4. The pressure tester is used for the transfer, verification and testing of force value. Technical requirements: 1. The accuracy level and technical error of the instrument are shown in Table 1. The purity of the instrument is the same as that of the pressure tester. 5. The pressure tester is used for the transfer, verification and testing of force value. Technical requirements: 1. The accuracy level and technical error of the instrument are shown in Table 1. The purity of the instrument is the same as that of the pressure tester. 6. The pressure tester is used for the transfer, verification and testing of force value. Technical requirements: 1. The accuracy level and technical error of the instrument are shown in Table 1. The purity level and technical error of the instrument are the same as that of the pressure tester. utrn.025 -n 25
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The calibration instrument will be tested under .MFa pressure, test 10niu, the pressure drop should be 5:min. The two bearing plates are matched with each other and the axis of the case has no straightness deviation. It is not more than 5 piston rotation time.
After differential, the precision should be no less than 1%, and the cost of a single piston is less than 20%. The quick check of the assumptions is shown in Table 2, Table
Simplified method
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Allowed release limit (nurmn)
According to the use of continuous management! !
6 The proportional constant K of the instrument is used as the basis for changing the starting balance point when measuring, K. The allowable range, data revision and allowable error are shown in Table 3. The first-class standard is not more than 20, and the third-class standard is not more than 50%. 8 The starting balance point of the instrument and the pressure at the service measurement point and the added special agent are selected in the table.
9, the weighted instrument is in the measurement group difference activity Beijing also accumulates the request to start the next point to re-measure the difference, the differential base is effective in the setting of the difference, the data revision is about to expand your hall code table 5: JJu2
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Special code for measuring pressure and negative pressure by card shall be prepared respectively: its capacity value and special code quantity refer to the specification of Table 6, Table 6
Non-pressure value (K:Pn)
The instrument shall have the following series of marks:
Maximum (unit)
Monitoring full (M+2)
The nameplate of the instrument shall be marked with the name of the instrument, model, number, accuracy grade, measurement range, manufacturer name 12.1
Published in February.
12.2 "For storage, the load-bearing plate is marked with the nameplate of the tester. 1. The cabinet return case number is marked with the special code on the return case number. The special code of the negative pressure value should be added to the value. ,,, 13. Only the active feces system and the special code:
13.1 When used for resale stations, the active seal should be flexible and can move freely in the active vertical space without any jamming or clamping. New and suitable instruments The working surface of the instrument, the chamber and the piston joint should be smooth and rust-free. The working surface of the instrument during use or after maintenance, the working surface of the chamber and the piston should not affect the measurement performance. 1103
J3.2 The matching of each special crusher should be interchangeable, and the looseness and tightness should not be swept. 13.3 The special foundation should still have a quality adjustment and should be tightly adjusted with a standard nail. The surface should be smaller than the violation surface. 13.4 The new card and the test surface should have a complete resistance to the rate of protection. Corrosion layer (blue, light or plated, etc., and smooth, without sand holes, rust or reduction. 3.5 Instrument system and special purpose for use: 14 Equipped with a live base system 1, a level. 15 The motor-driven wheel should be able to rotate at a speed of 300 hours, and the inspection time should be 300 times. 16.1 The upper limit of the standard instrument is within .6, the second standard type! , measure -0.25M, etc., the first standard live seat pressure is only empty or within the corresponding accuracy standard 6.1.2
The corresponding standard level:
The corresponding accuracy level of g Kai, group standard compensation code each has two classics. 16.1.3
1h.2 Other instruments
Special level: the graduation value is [--2°
Vertical indicator and its support: the master range of the dial indicator is 5-10. Autumn indicator, temperature and humidity meter.
Precision pressure gauge with an upper limit of D.4MPL, the source of pressure.M
Measurement of the special standard code for the effective area of the proportional constant, the standard mass is .25 16.2.6
The number plate is 9. The geometric shape of the special standard code is the same as the special code for the corresponding scale of the instrument matching specification: the allowable error of the single scale is 1.02%
.2. The gas-weak instrument: a gold-piercing instrument with an inner diameter of not less than 90nm. 17 Working medium and professional agents
The working medium of the instrument is variable bed oil or variable H filter and algae pool filter oil, its dynamic phase at 20 o'clock is at least 12:nm/g, the acid value is not more than 0.0KOHme-g, the pressure transmission medium is certified spherical gas: 19 Environmental conditions
External requirements during calibration:
18.1 Calibration instrument temperature is 2015t
18.2 The relative humidity is 80%.
183 Before calibration, the instrument needs to be placed in the calibration room for no less than 11, and the piece of film needs to be placed under the predetermined calibration temperature before calibration can be carried out:
4. Calibration items and calibration methods
19. Appearance inspection
The appearance inspection that cannot be performed should be carried out 12.-1.5.2. The instrument should be cleaned
The calibration worker should read the instructions, drag two live cases out of the living room, and take a calibration voucher For example, pour out the two mediums in the temperature tracking system, flush the two cylinders with air (or gasoline) and re-flush the oil system, as well as the gas system and the gasoline in the oil system, inject the new workpiece into the oil system, and then fill the two cylinders with clean and dry oil. The upper limit of the test is 0.4M, the side of the clothes (the mouth of the instrument can not be sealed), close the air cabinet, and then the air source is called to 0.3MP, keep it for 5min, and then update the signal adjustment rate to 0.3M, then close the air source and observe for 5min. There shall be no force drop on the pressure gauge: 22. Check the verticality of the load-bearing bird. Adjust the low angle gauge of the calibrator, so that the level of the tester 1 is with bubbles, and the pressure is generated, so that the knife rises and the pen works in the same position. Put the special level on the bearing plate, and keep the bubble at zero position. Then turn the level 00° (the bearing does not move), and the gas pool of the instrument should still be at zero position: turn the level 90°, 1, and the bubble of the level will deviate from zero at any time in any direction. 3: Use the same method to check the quality of the other piston. When the ratio of the two piston forces in any position and direction exceeds 5, the piston bearing plate is considered to be flat and the verticality of the piston assembly line is not specified:
23 Measurement of the rotation delay time of the piston
After the exhaust system is vented, use the standard pressure to assemble two pistons, raise one to the working position, rotate the assembly clockwise at the maximum initial speed under no load for 2-3 minutes, and use a meter to measure the rotation delay time of the piston after the rotation rate drops to the same level. The rotation delay time of each piston must be measured and recorded by 2-3 degrees. The value should be at least twice for each piston and should meet the requirements of Article 4.
24 Section 1 Test of descending speed
Open the valve of the tester to the atmosphere, use a pressure of not less than 1k2, and use a special pressure of 1kg on the simple plug to raise it to 2mm, and then close the valve of the hydraulic piston system. Place a dial indicator at the center of the small cup at the top of the dial. The dial contact rises about 5mm, and the pressure is about 2. Then the starter motor is still running, and the movement of the indicator pointer is observed. The time is measured with a stopwatch every time, and the measurement time is not less than 1min. Then place a pressure of not less than 3kg on the piston of the standard, and use the same method to measure the descending speed of the differential pressure.
The descent speed of the simple and differential movement is measured 3 times, and the value should conform to the current 25 proportional band number K in Table 2:
The internal temperature of the simple and differential movement is 40000, and the oil plate is added to make the two plugs work in the working position. The starting motor drives the two pistons to rotate. The two movements are balanced by the method of adding small efficiency codes, and then the simple movement is carried out according to the determination in Table 3. The effective area proportional constant of the simple and differential movement is measured. First-class instruments must measure 3 points when increasing and decreasing pressure, while third-class instruments only need to measure 3 points when increasing pressure.
26K4 value calculation and rounding
26.1K. value is calculated by the following formula:
In the formula: K-simple activity and differential piston effective surface ratio at: measuring point: after starting balance, the brick code mass plate on the differential piston bearing (kk); Am-: after starting balance, the differential activity bearing on the sub-general Small base weight (kg): Report the initial bacteria element, add the special base weight on the single flow plug bearing plate (): 2m, "- if balanced, the small weak plate pad on the simple activity rate focus (kg): 26.2 The arithmetic average value is calculated according to the following formula:
Test: KAr-KA arithmetic average value:
K Each measuring point flash single column value:
Measurement drink number, the second-class discussant is the storage drink, the first-class false group is 3 decisions 20.3KA cabinet error is calculated as follows:
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or: 6k.\-K, relative error:
K——the maximum compensation of the average value and the individual value: (2)
K, the total error of the value is calculated according to the provisions in Table 3. When the value exceeds the required water level, K is allowed to be re-measured once
26.4K. The arithmetic average value 3 should be in accordance with the provisions in Table 3. After the adjustment, fill in the calibration certificate 5, and its static value should meet the requirements of Table 3.
The sensitivity factor of the
instrument is measured at the measuring plate K. When the simple plug and the differential activity are balanced at the initial half-balance point, the differential activity case is the minimum code that destroys the balance of the two cases. The code value is the sensitivity of the instrument. The sensitivity value of the instrument should meet the requirements of Section 7. Differential activity cost As shown in Figure 1 and Figure 2, connect the instrument to be tested with the standard piston. When the instrument is connected to the atmosphere, adjust the positions of the two instruments and use the hydraulic pressure gauge to adjust the simple piston differential piston to the second working position. Then close all the doors to the atmosphere, add the initial balance weight specified in Table 4 to the standard piston and the differential piston, start the motor to drive the two pistons to rotate, and at the same time use the gas source to add the gas pressure gauge on the hydraulic pressure gauge to make the two pistons of the instrument and the standard piston (rotate clockwise at a starting speed of -m) are both in the 1. Working position. This position is regarded as the position of the initial balance point. If it is not balanced, add a small weight on the load plate of the working device (not the simple piston) until it is almost balanced. During the balancing process, if the differential piston is already in the initial balance position and the simple piston is already in the initial balance position, the hydraulic pressure gauge will adjust it to To the starting position, determine whether the three plugs are balanced, observe whether they are maintained in the working position, and then compare the measurement points specified in the table. For second-class instruments, it is necessary to increase the pressure and measure 3 points at each time: first-class instruments only need to increase the pressure and measure 3 points. During the measurement of each point (including the starting point), the three active cases are all engraved with the working compensation when the starting point is equal, and the calculation and correction of the differential activity are effective. About 29,1 differential activity plan effective area calculation formula: JIDG
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Formula: A—The effective area of the differential piston after taking the individual value of the measuring point (2) A
The new effective area of the standard instrument (cm): After the initial balance, the mass of the special layer code added to the differential piston bearing plate (k!): Am
After the initial balance, the mass of the small silicon code added to the differential piston bearing plate (kg): After the initial balance, the special code added to the standard bearing plate (k): Am
Starting balance After the balance, add the small selection base (?) on the standard live patrol multiplied by the base. The average value of the effective front of the difference case is calculated by the following formula: Ay
support: A half field
difference or piston effective blood volume average pin (m:; (4)
Xie sequentially first-class instrument n-6, third-class only: 3) 29.3 and still live case effective area cabinet error is calculated by the following formula: 4×100%
In the formula:. -- benefit live case effective area The tree of the product of the difference: A-case dynamic code plug is effective and the product of the single position and the center of the root of the mean value (). (Storage)
294 difference or active base is effective and the flat ditch value needs to be filled in the verification book according to the provisions of Table 5. The value of the form image is in line with the value of Table 5. The environment is 30 special selection code quality. The quality of the special method is calculated according to the following formula: m-Al-e
I:
special scale code quality (kg);
Basic pressure value (Pa)
-Difference efficiency effective area factor (m
\--The gravity acceleration at the place where the instrument is used (ms):--Air density ([.2kk/m);
0Special brick code material rate (垃圾7.810kg/m, 销k2.7×10kg/m) Note: When the output unit is, the effective area unit of the dynamic estimation room is 2, the special time code quality is calculated as follows: 100 1 +
-Touch pressure value (MP):
-Active effective area (cr):
Total symbol flash meaning () formula,
Special magnetic activity maximum when negative music: Calculation formula: A+e
Formula: m, Special code or quantity when measuring negative pressure (kg): K
Vacuum ratio value:
Other symbols have the same meaning as (7) formula
: Negative to receive: Active effective time, special code quality effect m,sPeg
In the formula: - measured negative pressure value (ME%);
The rest of the symbols mean the same as (7), (9) and 17;
The calibration of the quality of the code shall be carried out in accordance with the relevant national regulations. The quality of the code and the calculated value shall meet the requirements of Article 150,
5. Processing of calibration results and calibration cycle
3. The device that meets the requirements of the calibration will be issued with a certification certificate, and the one that does not meet the requirements will be issued with a re-certification number. The calibration period of the receiver is 1 year for the newly manufactured one, and 2 years for the used and repaired one.1108
The receiver can be used alone
1. External inspection set:
Note 1
Third class standard double separation pressure gauge calibration record table calibration mountain joint
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2, the device needs to be checked:
3, change the plane of the disk when the case axis multiplied by the inspection table: 4. Appropriate signing extension time:
Hospital single case: (1)
Differential chamber:
.s (2)
5. Live seat r drop speed <mr/min:
Single live: (1)
Differential piston: ()
6. Proportional effect K. The value of the creation:
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K, the average value and the maximum wildness of the individual letter The value KFKA is the approximate value of the plate. The effect of the force is 7. The measurement of the differential piston is effective and A: The amount of code on the bearing plate is changed to make a constant proportional band K, and the relative difference is observed in the difference between the difference and the new point of the difference. hyj
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8, special magnetic code quality calculation:
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9. Inspection result:
wheel determination certificate card number:
inspected product
quantity old
basic spirit
composition required number
immovable door occupancy effective surface loss
cr\differential activity is effective!
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certification certificate internal format
Appendix 2
-D.1~n..5
various narrow rotation range in the middle of the activity type
some effects
narrow drop continuity
high single driving plug
light dynamic activity to
receiver rate against
this sending and receiving diagram.
receiver use place version force increase rate installation
format or time and space super reading
operating pressure (MPa)
special month sheet#
special elimination code quantity and yuan difference (ke)
next time control certificate
test history most fixed production
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