P9
BNC (ORP/ pH) contact
5.2 pH probe calibration
Selecting high-quality pH value adjusting reagent to prepare standard solution;
Before pH probe calibration, run the procedure pH zero point calibration.
Turn the unit off and connect the probe to the controller, then power it up.
Put the cleaned pH electrode in the standard liquid and stir it a few times, etc., which shows
that the instrument is stable.
；
Press and hold “CAL” key for more than 3 seconds
，
LED display“- - - - -”
；
Press “PH” key
，
Digit display displays the measured value of the pH
；
Press
key
，
Adjust the displayed pH to the standard liquid pH.
；
Press and hold “CAL” key for more than 3 seconds again, the calibration is done and return.
Without any key press for more than 8 seconds, system will return automatically without save
the setting
。
Note:
The PH value standard liquid should be chosen the pH value which is larger than 7.0. do not
choose the pH value standard liquid whose PH value is close to 7.0. Otherwise, the correction
error may occur.(as choose PH4.0 or pH 9.0).
ORP probe does not need to run probe calibration.
”
∧
”,“
∨
”
6. PARAMETER SETTING
ORP default setting (factor y setting)
Parameter
Setting
Operating mode
OFF
Automatic Mode
Low ORP setpoint
600mV
ORP hysteresis (D)
50mV
Low ORP Alarm setpoint
600mV
High ORP Alarm setpoint
750mV
pH default setting (factor y setting)
Parameter
Setting
Operating mode
OFF
Automatic Mode
Low pH setpoint
pH 6.5
High pH setpoint
pH 7.5
pH hysteresis (D)
pH 0.5
Low pH Alarm setpoint
pH7.0
High pH Alarm setpoint
pH7.8
