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Section 6. Maintenance and Troubleshooting
6-3
2. Punch a very small hole in the bottom of the can.
3. Place the can in the top funnel of the rain gage and pour 16 fluid ounces
(1 pint) of water into the can. (A 16 oz. soft drink bottle filled to within
2.5 inches of the top may be used for a rough field calibration. An exact
volume will allow for a more precise calibration).
4. If it takes less than 45 minutes for this water to run out, the hole in the can
is too large.
5. One hundred tips plus or minus three tips should occur.
6. Adjusting screws are located on the bottom adjacent to the large center
drain hole. Adjust both screws the same number of turns. Rotation
clockwise increases the number of tips per 16 oz. of water; counter
clockwise rotation decreases the number of tips per 16 oz. of water. One
half turn of both screws causes a 2% to 3% change.
7. Check and re-level the rain gage lid.
6.2 TroubleShooting
6.2.1 No Response Using the Keypad
Check keypad response after each of the following steps.
A. Make sure the battery has been installed, and the power switch, if any, is
"ON".
B. Use a voltmeter to measure the voltage on the 12 V and G terminals; the
voltage must be between 9.6 and 16 VDC.
C. Disconnect any sensor or peripheral wires connected to the 5 V and 12 V
terminals.
D. Disconnect any communications or storage peripherals from the
datalogger.
E. Reset the datalogger by turning the power switch to "OFF", then to "ON"
or disconnect the solar panel or switch off AC power to the station then
disconnect and reconnect the battery. Remember to reconnect the solar
panel or switch on the AC power.
F. If still no response, call Campbell Scientific.
6.2.2 No Response from Datalogger through SC32A or Modem
Peripheral
At the datalogger:
A. Make sure the battery has been installed, and the power switch, if any, is
"ON".
B. Use a voltmeter to measure the voltage on the 12 V and G terminals; the
voltage must be between 9.6 and 16 V DC.
C. Make sure the datalogger is connected to the modem, and the modem is
properly configured and cabled.