JJG 882-1994 Pressure Transmitter JJG882-1994 Standard Download Decompression Password: www.bzxz.net

Verification Regulations for Pressure Transmitters
J.JG 882—1994
Verification Regulations for Pressure Transmitters
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This standard has been approved by the State Technical Supervision Bureau in 1994, and the responsible unit for implementation is: 190 Technical Supervision BureauwwW.bzxz.Net
Drafting unit: Shanghai Municipal Planning Research Institute, Shanghai Municipal Measurement and Metrology Monitoring Center
The main drafters of this standard are:
Song Jiafang ("Haihe Nuclear Research Institute",
Li Xing (Hangzhou Measurement and Metrology Monitoring Center) Gao Gua (Zhou Technical Supervision and Inspection Institute)
Gao Meng ("Haihe Metrology Technology Research Institute") Institute】Signed by:
Li Yuan (Xizhou Luojiang Instrument Factory)
Technical requirements
According to the specified case
Verification items and verification methods
Verification record and verification period
Appendix [Evaluation of total measurement uncertainty of the verification device Appendix 2 Verification record (format) of pressure transmitter
Verification procedure for pressure transmitter
This process uses the new system and the verification procedure of the small pressure transmitter (hereinafter referred to as the transmitter) in use.
The small transmitter is required to convert the pressure change into a transmittable uniform indication signal, and there is a given relationship between its input signal and the pressure variable. Note the function relationship, the book is a shallow function of the pressure transformer package, and the pen is for the pressure transmitter. There are two major categories of electric and pneumatic. The dynamic system-transmission signal is 1.A, 124A (or [-5V DC signal, the pneumatic model is 241-00kPs. The pressure transmitter can be divided into force (force short) balance type, electric penetration type, inductive type, variable type and particle type, etc.
2 Technical requirements
" Appearance
1.1 The nameplate of the transformer shall indicate the product name, model, specifications, measurement and other main technical standards, and the high and low service life shall be clearly marked, and the manufacturer's 1.3 The exterior of the new transmitter should be smooth and intact, without rust, and there should be no chips, debris, etc. inside: the transmitter after maintenance should be free from visible effects on the use and measurement performance. 2. The measuring part of the transmitter should be free from leakage and damage when it is subjected to the upper limit pressure of measurement [the working pressure of the transmitter can be determined]. 3. Basic error of the transmitter is as specified in Table 1: Table 1 Basic error of the transmitter is as specified in Table 1. :n.251
4 Similarly, the difference is set
(.2. : -a.25:
U 6 (2)
The newly manufactured transmitter returns to the table 1 with an error of more than ten: the return stroke of the slipped transmitter in use and repair makes the difference in the three tables absolutely not small
. With a sensitive heart, the upper point effect is not, and the final table is for the user! 5.1 The static pressure effect of the force balance differential pressure transmitter shall not exceed the provisions of Table 2. Table 2 Static pressure effect of the force balance differential pressure transmitter shall not exceed the provisions of Table 2. Static pressure effect of the force balance differential pressure transmitter shall not exceed the provisions of Table 2. Table 2 Static pressure effect of the force balance differential pressure transmitter shall not exceed the provisions of Table 2. Static pressure effect of the force balance differential pressure transmitter shall not exceed the provisions of Table 3. 5.2 Static pressure effect of the force balance differential pressure transmitter shall not exceed the provisions of Table 3.
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