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Temperature transmitter iTEMP TMT82
Endress+Hauser
Parameters and default settings for the expert mode
Damping
Burst mode
Those parameters which are not mentioned do not affect the safety function and can be
configured to any meaningful values. Whether or not the above-mentioned parameters
are visible in the operating menu depends in part on the user role, the firmware options
ordered and on the configuration of other parameters.
5.4
Commissioning test and proof testing
The functional integrity of the transmitter in the SIL mode must be verified during
commissioning, when changes are made to safety-related parameters, as well as at
appropriate time intervals.
NOTICE
Performing a commissioning check
‣
This must be performed in order to commission the device!
CAUTION
L
The safety function is not guaranteed during a commissioning or proof test. Suitable
measures must be taken to guarantee process safety during the test.
‣
The safety-related output signal 4 to 20 mA must not be used for the safety
instrumented system during testing.
‣
Any test performed must be documented. The template in the Appendix can be used
for this purpose. → 35
The operator specifies the test interval and this must be taken into account when
determining the probability of failure PFD
If no operator-specific proof-testing requirements have been defined, the following is a
possible alternative for testing the transmitter depending on the measured variable used
for the safety function. The individual proof test coverages (PTC) that can be used for
calculation are specified for the test sequences described below.
The device can be tested as follows:
• Test sequence A: complete test with HART operation
• Test sequence B: complete test without HART operation (with plug-in display)
• Test sequence C: simplified test with or without HART operation
Note the following for the test sequences:
• Test sequence C is not permitted for a commissioning test.
• The transmitter can be tested without a sensor using an appropriate sensor simulator
(resistance decade, reference voltage source, etc.).
• The accuracy of the measuring device used must meet the transmitter specifications.
• If both transmitter input channels are used, the test for the second sensor must be
repeated accordingly.
• A three-point calibration must be performed when customized linearization (e.g. with
CvD coefficients) is used. In addition, the Upper sensor limit and Lower sensor limit
must be checked.
Use in safety instrumented systems
Use this function to set the time constant for current output damping.
Factory setting: 0 s (default setting for SIL mode, cannot be changed)
®
Activation of the HART
burst mode for burst message X. Message 1 has
the highest priority, message 2 the second-highest priority, etc.
Factory setting: Off (default setting for SIL mode, cannot be changed)
of the sensor system.
avg
25
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