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8. Maintenance
Campbell Scientific recommends that the CRS451/CRS456 be factory recalibrated every 24
months. Before a CRS451/CRS456 is sent to Campbell Scientific, the customer must get an RMA
(returned material authorization) number and fill out the Declaration of Hazardous Material and
Decontamination form.
8.1 Every visit
l
Collect data.
l
Visually inspect the physical conditions.
l
Check battery condition by using a laptop and HydroSci software to view the battery
voltage (see
(p. 7)). The battery replacement procedure is provided
in
l
Check all readings; adjust offsets if necessary.
l
Check recent data.
8.2 Every two to three years or on a rotating
schedule
l
Send the CRS451/CRS456 in for inspection and calibration.
CRS451/CRS456 Submersible Water-Level Recording Sensor
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