CS451/CS456 Submersible Pressure Transducer
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9.2 Every Two Years
•
Send the CS451/CS456 to the factory for recalibration and inspection.
10. Troubleshooting
The most common causes for erroneous pressure transducer data include:
•
poor sensor connections to the data logger
•
damaged cables
•
damaged transducers
•
moisture in the vent tube
Problem:
Unit will not respond when attempting serial communications.
Suggestion:
Check the power (red is +V and black is ground) and signal (white is SDI-12
data) lines to ensure proper connection to the data logger. Check the data
logger program to ensure that the same port the SDI-12 data line is connected
to is specified in the measurement instruction.
Problem:
Transducer appears to be operating properly but data shows a periodic or cyclic
fluctuation not attributable to water level changes.
Suggestion:
A kinked or plugged vent tube will not effectively vent the pressure transducer
to atmospheric pressure. Normal changes in barometric pressure will appear as
water level fluctuations and these types of errors are typically on the order of 1
foot of water level. If the desiccant chamber has not been properly maintained,
water may have condensed in the vent tube and the device should be returned
to the factory for service.
