pH/chlorine regulator AUTODOS 5000 - 2005-01-21
Eng_Autodos5000.doc ver 3.2 - page 20
3.1.2. Free Chlorine Calibration (ProMinent chlorine electrode CLE 2.2)
Two point calibration (zero point and gain) against a photometer measured value (ex. DPD no.1).
Gain calibration should be carried out weekly, zero point calibration less often. If the zero point calibration is not to
be performed then ignore item 2 below (but pay attention to correct water flow!).
1.
Enter calibration by pressing the
'CAL'
button until the
'ACTIVE'
LED lights.
2.
For zero point calibration detach the measuring cable from the electrode. Wait one minute and then press the
button
'
↓
'
below display 1, zero point calibration is now complete. Before any further calibration can take place
the cable must be reconnected to the electrode and the electrode allowed to monitor in the metering cell for at
least 5 minutes. This is to ensure a reliable reading for the next calibration.
3.
Enter calibration ADJUST by pressing the
'CAL'
button until the
'ADJUST'
LED lights. The latest correct
electrode signal is now stored.
4.
Take a water sample and ascertain the correct chlorine value.
5.
Set the correct chlorine value on display 1 by means of the '
↓
' or '
↑
' buttons.
6.
Leave calibration by pressing the
'CAL'
button until the
'ADJUST'
LED is cleared.
Note. If the electrode signal differs significantly from the expected values an electrode fault will be indicated by text
display 'EL1' or 'EL2'. The AUTODOS 5000 will continue to use the calibration values from the last successful
calibration and the electrode fault will be automatically reset about one second after releasing the calibration button.
Chlorine value may be calibrated down to a lower limit of 0.05 ppm.
