Category: Gas
Issue date:
Effective date:
Revision number: 3
Supersedes: S-G-03 (rev. 2)
Part 19: Temperature and pressure transmitters
Table of contents
- 1.0 Scope
- 2.0 Unit requirements
- 3.0 Metrological requirements
- 4.0 Technical requirements
- 5.0 Marking requirements
- 6.0 Sealing requirements
- 7.0 Administrative requirements
- 8.0 Performance test requirements
1.0 Scope
This part of the Specifications applies to temperature and pressure transmitters.
2.0 Unit requirements
Note: The following requirements of Part 1, section 1.0 apply:
- 1.1 Use of units
- 1.2 Metric units of measure
3.0 Metrological requirements
Notes: The following requirements of Part 1, section 2.0 apply:
- 2.1 Rated operating conditions
- 2.3 Maximum permissible errors
- 2.5 Repeatability
- 2.9 Vibrations and shocks
- 2.16 Supply voltage variation
According to the characteristics of the transmitter, the following requirements may also apply:
- 2.6 Working pressure
- 2.7 Temperature
3.1 Maximum permissible errors
The error must not exceed the following maximum permissible errors (MPE) specified in Table 1 below.
Type | Test conditions | Working pressure (pw) | MPE |
---|---|---|---|
Temperature | Reference | n/a | ± 0.5 °C |
"Other than reference" | n/a | ± 1 °C | |
Pressure (gauge, absolute, barometer) | Reference | Pmin ≤ pw ≤ Pmax | ± 0.5% of reading |
"Other than reference" | Pmin ≤ pw ≤ Pmax | ± 1% of reading | |
Differential pressure (∆P) | Reference | Atmosphere |
|
75% of Pmax |
|
||
"Other than reference" | Atmosphere |
|
4.0 Technical requirements
Note: The following requirements of Part 1, section 3.0 apply:
- 3.1 Design, composition and construction
- 3.4 Case
- 3.8.2 Digital communication
- 3.9 Power sources
- 3.10 Software
5.0 Marking requirements
Notes: The following requirements of Part 1, section 4.0 apply:
- 4.1 Permanency and legibility
- 4.2
- (a) Departmental approval number
- (b) Manufacturer's name or registered trademark
- (c) Model or type designation
- (d) Serial number
- (e) Ambient temperature range, where less than -30 °C to 40 °C
- (f) Pmin (where applicable) and Pmax
- (j) Gas temperature range for which the errors ≤ MPE
- 4.9 External power supply
- 4.10 Software
- 4.11 Connection terminals
- 4.12 Inspection number
- 4.13 Verification marks
- 4.14 Operating information
According to the characteristics of the transmitter, the following requirements may also apply:
- 4.2 (k) Type and range for analogue input and/or output signal
- (l) Protocol/interface for digital input and/or output
- 4.3 Bar codes or quick response codes
5.1 Differential pressure transmitters
The pressure connection ports must be marked to distinguish the low pressure port from the high pressure port.
6.0 Sealing requirements
Note: The following requirements of Part 1, section 5.0 apply:
- 5.1 General
- 5.2 Electronic gas metering devices
7.0 Administrative requirements
Note: The requirements of Part 1, section 6.0 apply.
8.0 Performance test requirements
Note: Test conditions and performance tests can be obtained by contacting MC.