Endress+Hauser Micropilot FMR62 - Exceptions; Proof Testing

Proof testing Micropilot FMR62
20 Endress+Hauser
Error code "Cxxx"
• Current output: corresponding to measuring mode
• Comment: xxx = three-digit number
Error code "Sxxx"
• Current output: corresponding to measuring mode
• Comment: xxx = three-digit number
5.4.1 Exceptions
The error codes are listed in the Operating Instructions.
Error code "M272"
• Current output: ≥ 21.0 mA or ≤ 3.6 mA
• Comment: main electronics error
Error code "C484"
• Current output: ≥ 21.0 mA or ≤ 3.6 mA
• Comment: simulation failure mode
Error code "S942"
• Current output: ≥ 21.0 mA or ≤ 3.6 mA
• Comment: in safety distance
When SIL locking is active on the device, additional diagnostics are activated (e.g. the
output current that is read back is compared with the target value). If one of these
diagnostics results in an error message (e.g. F803 loop current) and SIL locking is
then deactivated, the error message remains while the error persists, even if the
diagnostic is no longer active in the unlocked state. In this case, the device must be
disconnected briefly from the power supply (e.g. by unplugging the terminals). When
the device is then restarted, a self-check is carried out, and the error message is reset
where applicable.
6 Proof testing
The safety-related functionality of the device in the SIL mode must be verified during
commissioning, when changes are made to safety-related parameters, and also at
appropriate time intervals. This enables this functionality to be verified within the
entire safety instrumented system. The time intervals must be specified by the
operator.
L
CAUTION
The safety function is not guaranteed during a 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 protective system
during the test.
‣
The operator specifies the testing interval and this must be taken into account when
determining the probability of failure PFD
avg
of the sensor system.
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.
Flexible testing of field devices
NAMUR Worksheet NA106 "Flexible proof testing of field devices in safety instrumented
systems" explains how to optimize testing activities on existing installations.