ORI-652 Jupiter
®
Model JM4 Magnetostrictive Transmitter – SIL Safety Manual
9
Step Action
1
Bypass the PLC or take other action to avoid a false trip.
2
Remove power from the Unit. (This clears any potential soft RAM errors.) Inspect the Unit in
detail outside and inside for physical damage or evidence of environmental or process leaks.
a.) Inspect the exterior of the unit housing. If there is any evidence of physical damage that
may impact the integrity of the housing and the environmental protection, the unit should
be repaired or replaced.
b.) Inspect the interior of the Unit. Any evidence of moisture, from process or environment, is
an indication of housing damage, and the unit should be repaired or replaced.
3
Restore power to the Unit. Use the Unit’s “DIAGNOSTICS” menu to observe “Present Status”
and to review “EVENT HISTORY”. Up to 10 events are stored. The events will be date and
time stamped if the internal clock is set and running. It is suggested that the internal clock be
set at the time of commissioning of the unit. If the clock is set at the time of the proof test event
times are calculated.
a.) Observe the “Present Status”. “Present Status” should be “OK”.
b.) Review the “EVENT HISTORY”.
i.) Messages in the “EVENT HISTORY” must be investigated and understood.
ii.) Corrective actions should be taken for critical messages that indicate performance may
be affected.
4
Use the Unit’s “DIAGNOSTICS” menu to perform a loop current test. Choose the menu “DIAG-
NOSTIC/ADVANCE DIAGNOSTICS/TRANSMITTER TESTS/Analog Output Test” to change the
output loop current and confirm the actual loop current matches the value chosen.
a.) Send a HART command to the transmitter (or use the local user interface) to go to high
alarm current output, 22mA, and verify that the analog current reaches that value.
i.) This step tests for compliance voltage problems such as low supply voltage or increased
wiring resistance.
ii.) This also tests for current loop control circuitry and adjustment problems.
b.) Send a HART command to the transmitter (or use the local user interface) to go to low
alarm current output, 3.6mA, and verify that the analog current reaches that value.
i.) This step tests for high quiescent current and supply voltage problems.
ii.) This also tests for current loop control circuitry and adjustment problems.
c.) Exit the “Analog Output Test” and confirm that the output returns to original state, with the
proper loop current as indicated and controlled by the unit.
