Maintenance And Calibration; Troubleshooting - Campbell GRANITE VOLT Series Product Manual

The SW12V terminals are used to power devices such as sensors that require 12 VDC during
measurement. Current sourcing must be limited to 200 mA or less on each channel. When the
supply voltage is below 14.5 VDC, the voltage on the SW12V terminals track the power supply.
Voltage on these terminals is regulated to 12.5 ± 0.5 VDC when the supply voltage is 14.5 to 32
VDC.

11. Maintenance and calibration

Protect the VOLT 100 series from humidity and moisture.
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Send to Campbell Scientific for factory calibration every three years.
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If sending the VOLT 100 series to Campbell Scientific for calibration or repair, consult first with a
Campbell Scientific representative. If the VOLT 100 series is malfunctioning, be prepared to
perform some troubleshooting procedures with Campbell Scientific. Many problems can be
resolved with a conversation. If calibration or repair is needed, the procedure shown in
(p. ii) should be followed when sending the product.

12. Troubleshooting

1. Check the voltage of the power source at the Power connector. It should be between 9.6
and 32 VDC.
2. Check wires and cables for the following:
Loose connection points
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Faulty connectors
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Cut wires
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Damaged insulation, which allows water to migrate into the cable. Water, whether or
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not it comes in contact with wire, can cause system failure. Water may increase the
dielectric constant of the cable sufficiently to impede sensor signals, or it may
migrate into the sensor, which will damage sensor electronics.
Assistance
VOLT 100 series 38