10
3.3 I Calibrati ng the sensor
• For the appliance to operate accurately and reliably, the pH sensor must be calibrated regularly
(on installati on, on re-commissioning aft er wintering, and every 2 months when in use).
• Never wipe the sensor or touch its ti p!
•
Rinse the ti p of the pH sensor with clean water using the supplied H
2
O bott le fi lled with tap water.
•
Shake it to remove excess water.
3.3.1 Calibrati ng pH 7
•
Immerse the sensor in the bott le of pH 7 buff er soluti on.
• Press and hold the
butt on for 5 seconds unti l
is displayed, then
,
• Press
, the progress bar is displayed:
•
Aft er about 60 seconds the pH sensor reliability measurement is displayed.
•
Depending on the message displayed, perform the corresponding operati ons:
Message
Acti on(s)
•
turn off the appliance using the
master switch
0-1
•
replace the buff er soluti on and/or the pH
sensor
•
restart calibrati on
conti nue calibrati on
•
Rinse the ti p of the pH sensor with clean water using the supplied H
2
O bott le.
•
Shake it to remove excess water.
3.3.2 Calibrati ng pH 4
•
Immerse the sensor in the bott le of pH 4 buff er soluti on.
• Press the
butt on to display
,
• Press
, the progress bar is displayed:
,
•
Aft er about 30 seconds the pH sensor reliability measurement is displayed.
•
Depending on the message displayed, perform the corresponding operati ons:
Message
Acti on(s)
•
turn off the appliance using the
master
switch
0-1
•
replace the buff er soluti on and/or the pH
sensor
•
restart calibrati on
•
press
to complete calibrati on
•
Rinse the ti p of the pH sensor with clean water using the supplied H
2
O bott le.
•
Shake it to remove excess water.
•
Fit the sensor back onto its holder.
•
The sensor measurement is more accurate if the calibrati on is performed at 2 points (pH7 and
pH4) rather than at a single point (pH7)
