Aqua Medic pH-Controller Manual De Instrucciones página 7

3. Starting and calibration
1. Connect to 100 – 240 V.
2. Connect the pH-electrode (No. 7).
3. Set switch (3) to „ph" (measuring).
4. Insert the electrode into the buffering solution pH 7. After 3 minutes, turn knob 4 (CAL pH7)
until the display shows pH 7 (use a small screw driver).
5. Flush electrode with distilled water.
6. Insert electrode in buffer solution pH 4 (or pH 9, depending on the desired range). After 3
minutes, turn the knob (5) until the display shows pH 4 or 9.
7. Adjust control range (MODE No. 9). Left switch for pH decrease, right switch for pH increase.
During operation, the point (No. 2) will flash.
The controller is now calibrated and ready for use.
To ensure a trouble-free use, the unit should be recalibrated every 4 weeks. Measuring and
controlling with a pH-controller is only as exact as the calibration. The electrode shall be emerged
into water only that the top part remains dry. Best is using the Aqua Medic electrode holder.
4. Controlling
Adjusting the set point:
- Turn knob 3 to „set".
- Adjust knob 6 (set point adjustion) to the desired set value.
- Turn switch 3 back to „ph".
The unit is now ready for use. As soon as the actual pH value rises or falls below the adjusted
value, the socket (8) is activated.
5. Troubles
- The unit shows wrong values on the display:
Recalibrate the electrode.
- The electrode cannot be recalibrated:
Check electrode for breakage (diaphragma), glass electrodes for glass breakage and the
electrolyte level of refillable electrodes. Take the operation manual of the corresponding
electrodes into consideration.
If the electrode cannot be recalibrated, it has to be renewed. pH-electrodes have only a limited life
span, depending on kind of use between 1 and 3 years.
6. Technical Data
Display:
Measuring range:
Resolution:
Accuracy:
Relay contact:
Working temperature:
Humidity:
Control range:
Control accuracy:
Power connection:
Dimensions:
Weight:
0.5" LED, 3-1/2 digits
pH 0 - 14
0.01 pH
+
0.01 pH (+ 1 digit) after calibration
-
5 amps. at 100 - 240 V
0 - 50 °C
below 80%
pH 3.5 to pH 10.5, digitally adjustable
+
0.05 pH (+ 1 digit)
-
100 – 240 V, 50/60 Hz, if not stated otherwise
150 x 85 x 40 mm
550 g
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