Campbell Scientific RAWS-H Remote Automated Weather Station - Manual (Page 16)

RAWS-H Remote Automated Weather Station
5.2.3 Troubleshooting
If a problem is suspected, the CH100 may be checked by measuring:
• input voltage between the two CHG terminals. From a solar panel,
the voltage should be 15 to 28 Vdc. From the standard wall charger
(pn 29796), the voltage should be 24 Vdc.
• charging output voltage (BATT INT or EXT terminal) with battery
disconnected about 13.5 to 14 Vdc
• power out (+12 terminals) about 11 to 14 Vdc
No voltage output implies a bad solar panel, regulator, or battery.
Power out (+12 terminals) is controlled by the CH100’s ON-OFF
switch position. NOTE
5.3 Battery
5.3.1 General Description
The RAWS battery is a rechargeable 12 volt battery. The battery requires a
regulated charging source provided by the CH100 connected to an unregulated
solar panel or a wall charger.
RAWS rechargeable batteries are designed to be float
charged. Permanent damage occurs and battery life is
shortened if the battery is allowed to discharge below
10.5 volts. WARNING
5.3.2 Wiring
The RAWS rechargeable battery should be connected to the CH100’s INT
(Internal) connector. The battery red lead connects to the positive battery
terminal and the black lead connects to the negative terminal. If desired, an
external battery can be connected to the CH100’s EXT (External) connector.
Reversal of battery polarity will damage the CH100 or
battery. WARNING
It is possible to leave two batteries connected. The battery
connections are diode isolated; however, if one of the
batteries fails, it could draw all the charging current and the
other battery will be discharged. CAUTION
5.3.3 Troubleshooting
If a problem is suspected, measure the +12 V and Ground terminal on the
CR1000 printed circuit board wiring panel. Acceptable readings are +11 to
+14 Vdc. Use PC200W software to collect the 1-HR data table from the
CR1000 datalogger and review the historical record of battery voltage.
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