15
MiniMaster
MA60-16E
ENGLISH
E
1 2 3 4 5 6 7
G
F
E
9. Calibration
The electric diodes must be cleaned, the fitting must have the correct flow and the dosing mode must be deactivated before
calibration takes place. Each unit is calibrated separately, they are independent of each other.
Calibrate pH
1. Reference for calibration can be either poolwater (option 1) or reference fluid (option 2). The pH value must be between
7.2 and 7.4.
Option 1 poolwater:
Drain the measurement water from the drain cock on the pre-filter (N). Check it using a photometric
measurement instrument.
Option 2 reference fluid:
Shut of the measurement water flow to the fitting. Undo the brace (M), fold out the modules,
disconnect the electrode’s BNC contact (see fig, 5) from the control unit, unscrew the pH electrode from the module,
refit the BNC contact.
Fill a measurement glass with pH 7.3 reference fluid to the point that it covers the end of the pH electrode (the reference
fluid is forfeited and may not be re-used).
2. Calibrate the unit by simultaneously pressing the calibration buttons (F+G) and keeping them pressed.
The LED will flash quickly (approx. 5 times/second), confirming that the calibration process is in progress.
3. Once calibration is complete, the LED will flash more slowly and you may now release the buttons.
The calibrated value is saved in the unit’s memory. The green LED in the centre comes on and now represents this value.
4. Once the unit has been calibrated, dosing may be activated by pressing the control unit’s On/Off button (E).
The LED for the current value now comes on with a steady light.
Calibrate free chlorine
1. Measurement test, free chlorine: Drain measurement water from the drain cock (N) on the pre-filter; use photometric
measurement equipment and check that the free chlorine value is between 0.5 - 1mg/l (ppm).
2. Calibrate the unit by simultaneously pressing the calibration buttons (F+G) and keeping them pressed. The LED will flash
quickly (approx. 5 times/second), confirming that the calibration process is in progress.
3. Once calibration is complete, the LED will flash more slowly and you may now release the buttons.
The calibrated value is saved in the unit’s memory. The green LED in the centre comes on and now represents this value.
4. Once the unit has been calibrated, dosing may be activated by pressing the control unit’s On/Off button (E). T LED for the
current value now remains on constantly.
If the calibration process is not successful, this is usually due to an unreasonable value (the previously stored value will remain
in the memory). The entire process will need to be repeated.
10. Operation
The value measured in the pool is shown symbolically on the display using the seven LEDs.
The green LED indicates MiniMaster calibrated value (everything is OK). Yellow/red LED indicate deviation from calibrated
value, see table below. Flashing LEDs indicate that the MiniMaster is measuring, with the speed of the flashing showing
whether or not dosing has been activated, for more information, read under “LEDs” on the next page.
In the event of a high pH value: Relay output R- activated in respect of acid dosing.
In the event of a low pH value: Relay output R+ activated in respect of alkali dosing.
In the event of a low chlorine value:
Relay output R+ activated in respect of chlorine dosing.
The process of switching between acid & alkali dosing is described in section 12: Changing factory settings.
Bild 8
LED →
↓
1. Red
Low
2. Yellow 3. Yellow
4. Green
Ok
5. Yellow 6. Yellow
7. Red
High
pH
< 6.8
6.8–7.0
7.0–7.2
Calibration value
(rec. 7.2–7.4)
7.4–7.6
7.6–7.8
>7.8
Free chlorine
< -80%
-60%
-30%
Calibration value
(rec. 0,5–1 ppm)
+30%
+60%
>+80%
Flow l/h
<10
11–18
18–26
27–52
53–72
72–100
>100
