Campbell Scientific CS512 Dissolved Oxygen Probe - Manual (Page 11)

Campbell Scientific CS512 Oxyguard Type III Dissolved Oxygen Probe
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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:
WHITE
BLACK
Agitator
+ -
12 V Battery
4 1
#7321 Relay
Crydom D1D07
3 2
Ground/G
Datalogger
Port C1
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.