Specifications

Section 19. Troubleshooting
19-7
19.4.3 Diagnosis and Fix Procedures
19.4.3.1 Battery Voltage Test
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If using a rechargeable power supply, disconnect the charging source (e.g., Solar Panel, Transformer
connected to 120 Vac) from the battery pack and wait for 20 minutes before proceeding with the test.
Set the voltmeter to read dc voltages as high as 15 Vdc.
Use the voltmeter to measure the voltage between the
+12 V and Ground terminals on the datalogger. Is the
voltage > 10.8 V?
Are you using sealed
rechargeable batteries?
Test the Battery under a Load
Program the datalogger to measure
the battery voltage (program 10)
using a 0.0156 second scan rate.
Use the voltmeter to measure the
voltage between the +12 V and
Ground terminals on the datalogger.
Is the voltage > 10.8 V?
Is the voltage
≥10.5 V?
Replace the batteries
(see note).
Recharge the batteries
(see note).
Is the battery voltage
>12 V?
The battery is good. The problems are
not caused by a poor power supply.
The battery voltage is adequate for datalogger
operation. However if the datalogger is to
function for a long period of time, Campbell
Scientific recommends replacing or, if using
sealed rechargeable batteries, recharging the
batteries so that the voltage is >12 V.
For customers using a sealed rechargeable battery that is
recharged via an unregulated solar panel or a transformer,
Campbell Scientific also recommends checking the charging
circuit.
NOTE