NOTE: these settings are sensor-specific and may vary depending
on the sensor installed.
• The following sensor settings may be changed:
• setpoints
• direction of the alarm
• latching or nonlatching
• enabled or not enabled.
• If necessary, these items can be configured using the HART or
the Ultima X Controller. For details on how to make these
changes, refer to the Ultima/Ultima X Controller and Calibrator
manual (P/N 813379).
• When using HART, ensure safety function is not affected by
utilizing password protection or other security measures to
prevent unvalidated changes to instrument parameters.
• If alarm outputs will be used for safety-related functions, they
must be tested prior to system operation. Once alarm outputs
are configured, apply and remove gas to and from the system
to ensure that alarms:
• are set when the thresholds are exceeded
• latch if configured to do so, or clear if they are not.
Proof Testing
The recommended proof test for the Ultima X Gas Monitor is given in
TABLE 2-1. This is a periodic test recommended to help detect the
majority of any dangerous, undetected failures. The proof test coverage
for this test depends on sensor type. The details may be found in the
FMEDA report, which is available upon request.
Perform this test periodically at intervals known as the proof test
interval, which must be chosen to meet the probability of failure on
demand requirements for SIL 2.
2-3
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