Perfom 2-Point Level And Analog Output Verification - Emerson Rosemount 5408 Reference Manual

Safety Instrumented Systems (4-20 mA only)
8.8.3

Perfom 2-point level and analog output verification

WARNING!
During the proof-test, the transmitter will not output measurement values corresponding to
the product surface level. Make sure systems and people relying on measurement values from
the transmitter are made aware of the changed conditions. Failure to do so could result in
death, serious injury and/or property damage.
Use Rosemount Radar Master Plus
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Prior to the test, ensure there are no alarms or warnings present in the transmitter.
a. Under Service Tools, select Alerts.
Bypass the process safety function and take appropriate action to avoid a false trip.
Simulate 4.00 mA output and verify loop current.
a. Under Service Tools, select Simulate.
b. Select Loop Test.
c. Select 4 mA and then select Start.
d. Measure loop current (e.g. reading the safety logic solver or using the TEST
terminal, see Section 7.4.4).
e. Verify the current deviation is within the safety deviation of 2% (±0.32 mA).
Note
The inaccuracy of safety logic solver or current meter needs to be considered.
Simulate 20.00 mA output and verify loop current.
a. Under Service Tools, select Simulate.
b. Select Loop Test.
c. Select 20 mA and then select Start.
d. Measure loop current (e.g. reading the safety logic solver or using the TEST
terminal, see Section 7.4.4).
e. Verify the current deviation is within the safety deviation of 2% (±0.32 mA).
Note
The inaccuracy of safety logic solver or current meter needs to be considered.
f. Select Stop to end loop test.
Perform a two-point level measurement verification of the transmitter in the
measuring range. Compare with independent measurement (e.g. the BPCS level
sensor).
a. Under Overview, select All Variables.
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