Campbell CS225 Manuale delle Istruzioni Scaricare il pdf (Pagina 24)

CS225 Temperature String

8. Maintenance and Calibration

The CS225 string requires no maintenance or calibration.

9. Troubleshooting

Symptom: -9999 or NAN for temperature

1. Verify the green wire is connected to the control port specified by the

SDI12 measurement instruction.

2. Verify the red power wire is connected to a 12V terminal; check the

voltage with a Digital Volt Meter. If a switched 12V terminal is used,

temporarily connect the red wire to a 12V terminal (non-switched) for test

purposes.

Symptom: Sensor won’t respond to command

1. Expected address not used or has been changed.

a. In this case you may wish to confirm all addresses in use with the

“aI!” command in a trial & error fashion. You will be able to

determine the individual addresses of each temperature sensor.

2. Expected sensor address has been to match another sensor address already

in use.

a. When readdressing temperature sensors you must avoid giving

multiple sensors the same address. If this does occur you will no

longer be able to communicate with these sensors. Use the

“aA{!” command, where “a” is the affected address. This will

reset the affected sensors to their factory configured address

value.

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Campbell CS225 Manuale delle Istruzioni Pagina 24