9
3.3 Calibrating the sensor(s)
•
To operate accurately and reliably, the sensors must be calibrated before using the power pack with the
module. To maintain maximum effi ciency of the unit, we recommend calibrati ng at least once every 2 months
during the period the swimming pool is being used.
•
Ensure the sensors are cleaned before calibrati on (see «4.1 Cleaning the sensor(s)»).
•
Confi rm that the power pack is plugged in,
•
Stop the pool pump and isolate the sensors by closing any valves, so as to be able to remove the sensors safely.
•
Disconnect the BNC cable from the top of each sensor then remove them (unscrew) from the POD. Then reconnect the
BNC cable to the sensors.
•
Rinse the end of the sensors with clean water and shake them to remove excess water. Do not touch or wipe the glass
bulb at the end of the sensors.
•
Put the pH sensor into a sample of the pH7.5 buff er soluti on supplied.
•
Put the ACL sensor into a sample of the 700 mV buff er soluti on supplied.
•
Leave the sensors immersed for about 1 minute to obtain a reliable
measurement.
•
Press
or
the use the
or
keys to display "CALIB. PH" or "CALIB. PH\ACL",
•
then press
or
.
•
Use the
or
keys to display "CALIBRAGE PH" (pH Link and Dual Link) or " CALIBRAGE ACL" (Dual Link only) then
press
or
.
Note the measured value:
•
pH = 'X.X'
-
If the value is greater than 8.2 or less than 6.4: the sensor is dirty or has been damaged during transport. Clean the
pH sensor (see “4.1 Cleaning the sensor(s)”) then repeat the above steps. If the problem persists, contact your reseller.
-
If the value is between 6.4 and 8.2, press
or
to begin calibrati on. The procedure takes about 15 seconds.
-
When calibrati on is fi nished, check that the value displayed equals 7.5, otherwise repeat the calibrati on.
•
ACL = 'XXX'
-
Start the calibrati on procedure by pressing
or
, the procedure lasts about 15 seconds,
-
If the value is 700: calibrati on is correct,
-
If the value is not 700: repeat the calibrati on steps. If the problem persists, clean the sensor, see “4.1 Cleaning the
sensor(s)”,
-
Press
or
or wait 30 seconds to exit.
