Operation Manual
SYSTEM
OCR-504 Multispectral Radiometer
SECTION
G - MAINTENANCE
lubricated before mating. Do not use petroleum-based lubricants. Sea-Bird
Scientific recommends using DC-111 silicone grease (made by Dow Corning
®
)
on the male pins prior to connection. Also, ensure that the connections are
complete and, if applicable, the locking sleeves are secure.
•
Check that the power cable is properly connected to the power supply and
the instrument
•
Check that the RS-232 or RS-422 cable is connected to the correct PC
communications port.
C
HECK THE
S
UPPLY
V
OLTAGE TO THE
OCR-504
Voltages above the maximum input voltage may damage the instrument and
voltages below the minimum operating voltage may cause the device to drop
out of regulation. Thus, you must ensure the voltage input to the instrument is
within the allowed range, specified in the
Assembly Procedure
of section
C -
START UP
.
To check voltages, a multimeter with DC voltage measurement, resistance
measurement, and continuity check capability is required.
Procedure:
1. Set the multimeter to measure a DC voltage.
2. If using a battery as the power source, measure the voltage directly at the
battery terminals with the multimeter. If the voltage is low then recharge or
replace the battery. If using a DC power supply, set the output voltage to
within the proper range and check the voltage with the multimeter.
3. Connect the power supply cable to the power source.
4. Being extremely careful not to short the probe leads, measure the voltage
between the pins on the supply cable. It should read approximately the
same as the measurement taken in step 2. If the voltages are not the same,
recheck the power supply cable connections. If the voltages are still not the
same, the cable is likely broken and will need repair. A wire break can be
confirmed with a
continuity
check
, as outlined in the next section.
5. If the voltage is within tolerance, connect the power supply cable to the
instrument.
6. Again, measure the voltage at the power supply terminals. The voltage
should remain approximately the same as before, although there may be a
small voltage drop when using a battery (battery voltage drops under load).
If there is a significant voltage drop, disconnect the power immediately and
check for shorts in the cable.
