TM 55-1925-285-13&P
0005 00
! CAUTION
OCM WARNING 2 and 3 may cycle on and off depending on the amount of dirt, bubbles,
foam, or air in the sample. If OCM WARNING 2 or 3 illuminate for more than 60 seconds
continuously, check the OCM to ensure flow is present. Operating the OCM without flow
through it for more than 2 minutes will result in damage to the OCM. Failure to comply
with this caution will result in damage to the equipment.
e. OCM WARNING 2 (figure 7, item 6) on the OCM display (figure 7, item 2) is not illuminated.
f.
OCM WARNING 3 (figure 7, item 7) on the OCM display (figure 7, item 2) is not illuminated.
g. The POWER ON indicator A2DS1 (figure 6, item 5) is illuminated on the Remote Indicator Assembly
(figure 6, item 2) if the ALARM LIMIT (PPM) SELECTOR switch A1S2 (figure 4, item 2) is in the REMOTE
position.
h. The appropriate alarm limit indicator (figure 6, items 3 and 4) is illuminated on the Remote Indicator
Assembly (figure 6, item 2) to correspond with the alarm limit selected if the ALARM LIMIT (PPM) SELEC-
TOR switch A1S2 (figure 4, item 2) is in the REMOTE position.
NOTE
There may be up to a one-minute delay between the time when the OCM turns on and
when a numeric PPM value is displayed.
i.
The OIL CONTENT PPM (figure 6, item 6) is displayed on the Remote Indicator Assembly (figure 6, item 2)
if the ALARM LIMIT (PPM) SELECTOR switch A1S2 (figure 4, item 2) is in the REMOTE position.
j.
The Diverter Valve Position Indicator (figure 5, item 2) illuminates green (figure 5, item 3) for overboard
discharge and illuminates red (figure 5, item 1) for discharge to the Oily Waste Holding Tank.
NOTE
When the OCM is turned OFF, or is inactive because sample pressure is outside the
operating pressure range, the effluent diverter solenoid valve will be in its default position,
recirculating effluent to the Oily Waste Tank (OWT). When the OCM is activated by its
pressure switch, it must detect four consecutive "good" samples (at 15-second intervals)
before the remote relay assembly will send a signal to the diverter solenoid valve, diverting
effluent flow overboard. If the effluent oil concentration rises above the set alarm level for
one sample, the Remote Relay Assembly will remove the signal, causing the diverter
solenoid valve to return to its default (recirculating) position. Loss of control signal or
power to the diverter solenoid valve also causes it to return to its default position.
k. The OCM Sample Inlet Pressure Gauge (figure 5, item 4) indicates a pressure between 5 and 25 PSI (0.3
to 1.7 bar).
l.
Monitor the effluent diverter solenoid valve (figure 3, item 4) to ensure that it is being automatically con-
trolled by a signal from the OCM remote relay assembly (figure 1, item 4).
0005 00-9