used in monitoring, alarm, and control functions.
Storage tank level meter calibration is done
The card cage assembly will swing up for
by use of a three-position momentary contact
maintenance.
switch, a full-scale adjust potentiometer, and the
associated zero adjust potentiometer for each
Relay Panel Assembly
tank. If the switch is pushed to the FULL
position, you can set the full adjust potentiometer
Section 1A3A2 of the FSCC contains the relay
to obtain a full-scale reading on the associated
panel assembly. The nine 24-volt dc relays
panel meter. When the switch is in the ZERO
control FO and JP-5 valve closing. They are
position, you can set the zero adjust potentiometer
energized by the auto fill circuits. Associated with
to obtain a zero panel meter reading.
each relay is a suppression diode (CR1 through
You can also calibrate the FO receiving tank
CR9) to prevent damage to the auto fill logic
pressure meter circuits at this panel. A PUSH
output circuits. The front side of this panel holds
TO ADJUST FULL SCALE push button is
the spare fuses for the console.
associated with each receiving tank pressure
circuit. When the push button is depressed, you
Fuse and Circuit Breaker Panel
can set the panel meter for full scale by adjusting
the full-scale adjust screw on the panel meter
Section 1A2A2 of the FSCC has the fuse and
assembly.
circuit breaker (CB) panel. CB1 is the main power
From the calibration panel, you can adjust the
CB for the FSCC. Fuses 1 through 10 protect the
high seawater, fuel overflow, JP-5 storage tank
console from faults in the 120-volt ac remote
level HI/LO, and FO receiving tank pressure high
control wiring. Three switches, S1, S2, and S3,
hazard alarm set points. When the push button
turn power on and off to the three power supply
for one of these alarms is depressed, the associated
drawers.
panel meter reads the alarm set point. By
turning the corresponding adjust potentiometer,
Calibration Panel
you can adjust the alarm set point to its desired
value.
Section 1A1A2 of the FSCC houses the
Also located on this panel are two mode
calibration panel. This panel contains the
switches. These affect the JP-5 storage tank
switches and potentiometers used in calibrating
circuits. When in the LOCAL ONLY position,
meter circuits and setting alarm points for those
only the FSCC panel meter indicates tank level.
functions processed by the FSCC.
When in the LOCAL AND REMOTE position,
Figure 9-13.--Fuel oil transfer local panel.
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