7. Product description
The meter allows precise measurement of dissolved oxygen in water. This value is affected by
oxygen-producing and oxygen-consuming processes and varies with according to the area of
application.Theoxygenmeasurementisusedinagriculture,horticulture,shfarming,aquari-
ums, in laboratories, for quality control or in the private sphere. In addition, oxygen saturation
in the air can be measured. The temperature measurement probe is integrated in the sensor.
Theoxygenprobecomponentisthethinmembraneofpolytetrauoroethylene(PTFE)mounted
on the tip of the probe. The membrane is permeable to oxygen molecules, but not to the con-
siderably larger molecules contained in the electrolyte. This property allows oxygen diffusion
throughtheelectrolytesolutioncontainedintheprobe.Theconcentrationcanbequantiedby
the measurement circuit.
8. Power supply
The meter can be used as a mobile device with battery or rechargeable battery. In case of
stationary operation or long-term measurements, an optional power supply can be connected.
When connecting a power supply, the connection between the battery and the meter
is automatically interrupted. So the battery does not need to be removed for power
supply operation.
a) Inserting or changing the battery
• Beforerstuseorwhenthebatterychangesymbolappearsintheupperlefthandcornerof
the display, a new, fully charged battery must be inserted.
• When changing the battery, make sure that the meter is turned off.
• Use a suitable Phillips screwdriver to unscrew the screw on the battery compartment (16).
• Pull the battery compartment cover off the device in the direction of the arrow.
• Connect a new battery to the battery clip, observing the correct polarity. Insert the battery into
the meter. Make sure that the connection cables are not pinched.
• Close the battery compartment in reverse order and screw it back in carefully.
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