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BS EN IEC 62828-2:2018:2020 Edition

BS EN IEC 62828-2:2018:2020 Edition

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Reference conditions and procedures for testing industrial and process measurement transmitters – Specific procedures for pressure transmitters

Published By Publication Date Number of Pages
BSI 2020 30
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This part of IEC 62828 establishes specific procedures for testing pressure process measurement transmitters (PMT) used in measuring and control systems for industrial processes and for machinery control systems.

A pressure PMT can feature a remote seal to bring the process variable to the sensing element in the PMT. When the remote seal cannot be separated from the PMT, the complete device is tested.

For general test procedures, reference is made to IEC 62828-1, which is applicable to all types of process measurement transmitters.

NOTE In industrial and process applications, to indicate the process measurement transmitters, it is common also to use the terms “industrial transmitters”, or “process transmitters”.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
12 1 Scope
2 Normative references
3 Terms and definitions
3.1 General
13 Figures
Figure 1 ā€“ Measuring range and associated properties of a pressure PMT
14 3.2 Terms related the process conditions
4 General description of the device and overview
5 Reference test conditions
15 6 Test procedures
6.1 General
6.2 Tests at standard and operating reference test conditions
6.2.1 General
6.2.2 Accuracy test suitable for routine and acceptance tests
Figure 2 ā€“ Schematic example of a test set-up for pressure PMT
16 6.2.3 Overpressure
Figure 3 ā€“ Example of measured error plot
Tables
Table 1 ā€“ Example of measured errors
17 Figure 4 ā€“ Procedure for the determination of the unilateral overpressure error
18 6.2.4 Influence of static pressure
Figure 5 ā€“ Schematic example of test set-up for determinethe effect of the static pressure
19 Figure 6 ā€“ Procedure for the determination of the zero point error with static pressure
20 6.2.5 Long-term drift
Figure 7 ā€“ Procedure for the determination of the span error for static pressure
21 6.2.6 Leakage test
6.2.7 Additional tests for diaphragm/remote seals ā€“ Influence of process temperature (long term)
7 Test report and technical documentation
7.1 General
22 7.2 Total probable error
23 Annex A (informative)Relationship between the SI unit and other pressure related units
Table A.1 ā€“ Relationship between the SI unit and other pressure related units
24 Annex B (informative)Pressure process measurement transmitter (PMT)
B.1 General description of a pressure PMT
B.2 Typical PMTs
25 Figure B.1 ā€“ Schematic example of intelligent PMT model
26 Annex C (informative)Example of signal current range for a 4 to 20 mA PMT
C.1 Signal current range of a 4 mA to 20 mA transmitter (before adjustment)
C.2 Proportional range
C.3 Normal range
C.4 Underrange
Figure C.1 ā€“ Signal current range of a 4 mA ā€“ 20 mA transmitter (before adjustment)
27 C.5 Overrange
C.6 Low alarm
C.7 High alarm
28 Bibliography

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BS EN IEC 62828-2:2018
$142.49