Campbell Scientific CS700 Tipping Bucket Rain Gage and CS700H Heated Rain Gage - Manual (Page 22)

CS700 and CS700H Rain Gage
6. Troubleshooting
6.1 Precipitation
Symptom: No Precipitation
1. Check that the sensor is wired to the Pulse Channel specified by the pulse
count instruction.
2. Verify that the Configuration Code (Switch Closure), and Multiplier and
Offset parameters for the Pulse Count instruction are correct for the
datalogger type.
3. Disconnect the sensor from the datalogger and use an ohm meter to do a
continuity check of the switch. The resistance measured at the terminal
block on the inside of the bucket between the black and white leads
should vary from infinite (switch open) when the bucket is tipped, to less
than an ohm when the bucket is balanced.
7. Maintenance
During each site visit, remove any debris, insects, sediment, etc. from the
collection funnel, debris screen, siphoning mechanism, or tipping bucket
assembly.
Verify the tipping bucket assembly moves freely, and that the datalogger
records each bucket tip.
7.1 Dismantling for Cleaning
The following items should be checked regularly for cleanliness:
• Catch filter (see Figure 7-3)
• Siphon (see Figure 7-3)
• Interior of bucket (see Figure 7-1)
• Top surface of adjusting screws (see Figure 7-1)
• Housing locking screws; lightly lubricate after cleaning (see Figure 7-1)
• All insect screens (see Figure 7-1)
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