P8
pH Alarm
pH
≤
Low pH ALARM setpoint or, pH
≥
High pH ALARM setpoint, pH“ALARM”LED light up
，
otherwise LED off.
Important note:
High pH setpoint must be higher than Low pH setpoint, otherwise, Acid dosing pump and Alk
dosing pump may run at the same time.
4.3.2.3
Manual mod
ORP manual mode
：（
ORP manual LED light up
）
Sanitizer feed relay is “close”. If it is connected to Sanitizer dosing pump, the pump will run. At
the same time, ORP FEED”LED light up.
pH manual mode
：（
pH manual LED light up
）
Acid and Alk feed relay are “close”. If it is connected to Acid/ Alk dosing pumps, pumps will
run. At the same time, pH FEED”LED light up.
During using pH manual mode, suggest the controller is connected to either Acid or Alk
dosing pump only. Otherwise, both pump will running at the same time.
5. CALIBRATION
5.1 Zero point calibration
ORP/pH zero point calibration
：
Calibrate ORP or pH zero point
Power down the controller
Short contacts of BNC connector for ORP / pH (the function is under calibration) (refer to BNC
(ORP/ pH) contact)
Press and hold “ORP”or“pH”(the function is under calibration), then power up the controller.
The unit will have a “beep” sound. Calibration is completed.
If Calibration is successful, digit display will show“ORP CL”for 3 seconds (when calibrate pH, it
will show“PH CL”) and return.
Power the controller off, remove connection wire on BNC connector and then reconnect
probes to BNC.
Power the controller up, it will display the real time value for ORP and pH.