Campbell CS451 Manual descargar pdf (Pagina 30)

CS451/CS456 Submersible Pressure Transducer

• The desiccant in the tube changes color from blue to pink when the drying

power is lost.

• The Enclosure Accessory Humidity Indicator Card (pn 28878).

8.1 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

8.2 Every Two to Three Years or on a Rotating Schedule

• Send the CS451/CS456 in for inspection.

9. 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 datalogger. Check the datalogger

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 CS451 Manual Pagina 30