Ph7.0 Buffer Calibration - Maytronics pH Drive i Series Instruction Manual

pH Sensor Calibration

pH7.0 Buffer Calibration

The pH Drive is powered from your Ozone
Swim unit. The pH Drive will need power for
calibration, but with the pH Sensor removed
from the pH Tee, the pool pump must not be
running. You will therefore need to unplug
the pool pump from the Ozone Swim unit.
1. Prepare pH7.0 Calibration Buffer
! A sachet containing powder
to make pH7.0 Calibration
Buffer was supplied with your
pH Drive. Simply pour the
contents into the 250mL
bottle and fill to the 250mL
m a r k w i t h d e i o n i s e d o r
distilled water. Shake well
until all salts have dissolved.
This solution will last up to 6
!
months after it has been
made, providing it is not
contaminated and is stored in
a cool, dark place
2. Remove the pH Sensor from the Tee
! Disconnect the pH Sensor to avoid
straining the cable and plug when
removing the sensor from the pH Tee.
Unscrew the sensor completely from the
Tee.
! Reconnect the pH Sensor to the pH Drive.
! Rinse the sensor well in clean water. De-
ionized or distilled water is ideal, but tap
water will suffice.
3. Place pH Sensor into pH7.0 Buffer
! Decant a small amount of
pH7.0 buffer into a clean cup.
Place the pH Sensor into this
buffer, so it is immersed to
15mm or more, as per the
diagram on the right.
! DO NOT place the pH Sensor
direc tly into the 250mL
bottle of pH7.0 buffer.
4. Calibration Procedure
! Switch the pH Drive on by activating the
! Press Setup to enter the user-friendly
! Press Enter to go to the Calibration screen.
250
200
150
100
50
pH Buffer Powder
O
pH 7.00 @ 25 C
! Press ‡ and ˆ to set the "Cal:" pH value to
250mL Solution Powder
! Press Enter to calibrate the pH Sensor, or
5. Re-fit pH Sensor and Power Connections
! Disconnect the pH Sensor from the pH
! Re-connect the pool pump to the Ozone
! Switch your pool equipment back on.
Calibration Failure
If pH calibration fails, the pH Drive will display
this message:
! C l e a n t h e p H S e n s o r a s p e r t h e
! If the calibration failure persists, the pH
pool pump output of the Ozone Swim unit.
menu system, then press ‡ and ˆ until
Calibrate pH Sensor is selected.
The current reading is displayed in
brackets. The flashing "X" indicates that
the reading is not yet stable. DO NOT
calibrate until the "X" changes to a "ü"
exactly 7.0.
press Cancel to quit without calibrating.
Drive to avoid straining the cable and plug
when screwing into the pH Tee. Re-fit into
the pH Tee. Re-connect the pH Sensor to
the pH Drive when done.
Swim power outlet.
troubleshooting sec tion, then retr y
calibration.
Sensor will most likely need to be replaced.
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