Proof testing Micropilot FMR62
24 Endress+Hauser
Procedure for range monitoring
1. Perform device self-check. For this, in the operating menu "Expert → Sensor → Sensor
diagnostics → Start self check" select "Yes".
2. After performing the test, read the result in the "Expert→ Sensor → Sensor
diagnostics → Result self check" parameter.
This part of the test has been passed only when "OK" is displayed here.
3. Simulate five levels within the range to be monitored. Procedure, → Point level
monitoring, step 3.
4. Read the output current at each level value, record it and assess for accuracy.
The test is to be considered successful if the current values in step 4 are within the
required level of accuracy.
If the "Expert" menu group is selected, a prompt for the access code appears on the
display. If an access code was defined under "Setup → Advanced setup → Define access
code" this code must be entered here. If no access code was defined, the prompt can be
acknowledged by pressing the "E" key.
NOTICE
The device has failed the proof test if the current value at a specific level deviates by
> ± 2% from the expected value.
68% of dangerous, undetected failures are detected using this test (proof test coverage,
PTC = 0.68).
‣
For troubleshooting, refer to the Operating Instructions.
‣
A number of sensor (antenna) faults and faults in the sensor electronics are not
detected.
L
CAUTION
Once test sequence C has been performed, the SIL mode must be activated again!
‣
Activate SIL mode (as per "Device configuration for safety-related applications").
‣
The following steps do not need to be performed again in this case: Steps 1 and 2 were
performed in the context of (initial) commissioning/configuration. Steps 3, 6 and 7
were performed in the context of this proof test with the relevant diagnostic coverage.
6.4 Test sequence D
Preparatory steps
1. Deactivate SIL mode. To do so, in the operating menu select "Setup → Advanced setup
→ Deactivate SIL/WHG → Reset write protection" and enter the appropriate locking
code (WHG: 7450; SIL: 7452; SIL and WHG: 7454).
The SIL mode is deactivated.
2. Connect a suitable measuring device (recommended accuracy better than ±0.1 mA)
to the current output.
3. Determine the safety setting (point level or range monitoring).
Procedure for point level monitoring
1. Perform device self-check. For this, in the operating menu "Expert → Sensor → Sensor
diagnostics → Start self check" select "Yes".
2. After performing the test, read the result in the "Expert→ Sensor → Sensor
diagnostics → Result self check" parameter.
This part of the test has been passed only when "OK" is displayed here.
To Next Page
Loading...
