Aqua Medic mV Computer Manual De Instrucciones página 9

High: An adjusted maximum set point is controlled by adding a reducing agent. The direction of
control is downwards. To change the control mode between high and low, press Prog./Enter (2)
and the High/Low button (7) simultaneously. The actual mode is shown by the LED's (3).
6. Adjusting the set point
To adjust the set point, press Prog./Enter and the SET buttons simultaneously. The adjusted set
point is now shown on the display – flashing. It can be changed by using the + and – buttons. By
pressing the Prog./Enter button again, the set-point is saved and the display switches back to the
actual value. The hysteresis should be between 5 - 10 mV. If it is too low, the computer will switch
on and off in a very short time. If it is too high, the accuracy will be bad.
7. Sensor calibration
The measurement of the redox-potential is an absolute measurement of voltage. The mV-
Computer does not need to be calibrated. Differences may be caused by the electrode. They can be
checked with the included standard solution. If the differences are small (up to 20 mV) the probe
can still be used. If the differences are higher, the probe must be cleaned, refilled or replaced.
For continuous measurement of the redox-potential, the probe must be securely placed 5 cm below
the surface of the water and the shaft has to be kept dry (we recommend the Aqua Medic electrode
holder).
The unit is now ready for use. As soon as the redox-potential value falls below or rises above the
desired adjusted value, the unit activates the power plug. This is indicated by the LED out (5).
Fig. 2: Example of set-up - mV-monitoring and controlling at the aquarium with an
Ozonizer
1. mV computer
2. Ozonizer
3. Membrane air pump
4. Connection plug
5. mV-electrode
6. Protein skimmer
7. Aquarium
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