Campbell Scientific CS512 Oxyguard Type III Dissolved Oxygen Probe

9. Maintenance

The CS512 probe needs little maintenance. Regular cleaning of the membrane is all that is required. The membrane is very durable and can be cleaned with a cloth or soft paper. Do not scratch it clean with your fingernail.

10. Agitator Control

In low flow conditions (less than about 5 cm/sec), it may be necessary to add an agitator to the CS512 probe. Campbell Scientific ships the agitator with a repeat cycle timer. Using the repeat cycle timer requires no datalogger programming. However, some users choose to use a solid state relay and have the datalogger agitate the water on the probe face either periodically throughout the day or just before measurement. Agitating just before the measurement saves on power and causes less wear and tear on the agitator and probe membrane.

The wiring for the agitator as controlled by this example program would be as follows:

Ground/G

 

 

 

 

BLACK

 

 

 

4

1

 

 

Agitator

Datalogger

 

 

#7321 Relay

 

 

 

 

 

 

 

 

 

 

 

 

Crydom D1D07

 

 

 

 

Port C1

 

3

2

 

WHITE

 

 

 

 

 

 

 

 

 

 

 

+-

12 V Battery

FIGURE 10-1. Agitator Wiring

The following instructions would trigger the agitator as discussed in the agitator manual.

In the CR510, CR10X, and CR23X, use instruction P86 and P22.

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