Campbell CS455 Manuel télécharger pdf (Page 26)

CS450/CS455 Pressure Transducer

7.1 Every Visit

• Collect data

• Visually inspect wiring and physical conditions

• Check indicating desiccant or enclosure humidity indicator; service if

necessary

• Check battery condition (inspect physical appearance and use a keyboard

display, PDA, or laptop to view the battery voltage)

• Check all sensor readings: adjust transducer offsets if necessary

• Check recent data

7.2 Every Two to Three Years or on a Rotating Schedule

• Send the CS450/CS455 in for inspection and have them served and

or/replaced as needed.

8. Troubleshooting

The most common causes for erroneous pressure transducer data include:

• poor sensor connections to the datalogger

• 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 logger. Check the 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.

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Campbell CS455 Manuel Page 26