Calibration – Campbell Scientific CS700 Tipping Bucket Rain Gage and CS700H Heated Rain Gage User Manual
Page 27
CS700 and CS700H Rain Gage
8. Calibration
The sensor is factory calibrated; recalibration is not required unless damage
has occurred or the adjustment screws have loosened.
Nevertheless, the following calibration check is recommended once every 12
months:
a. Remove the housing assembly from the base by removing the three
screws and lifting upward on the housing.
b. Check the bubble level to verify the rain gage is level.
c. Pour water through the inner funnel to wet the two bucket surfaces.
Using a graduated cylinder, slowly pour 314 cc (19.16 in
3
) of water, over
a 15 minute period, into the collection funnel. This volume of water is
equal to .39 in of rainfall (10 mm).
d. After the water has passed through the rain gage, the tipping bucket
should have tipped 39 times.
e. If the rain gage fails to record the correct number of tips, return the unit to
Campbell Scientific for recalibration.
Factory Calibration
If factory calibration is required, contact Campbell Scientific to obtain an
RMA (see Warranty and Assistance in the front of the manual).
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