M920CA & M920WCA pH/Dual ORP Controller Owner’s Manual
C. System Components
1. IPS M920CA pH/Dual ORP Controller
a. Allows automac monitoring of water sanizaon and pH
balance through a simple, user-friendly interface, resulng in
easier management of water balance in swimming pools, spas,
or circulang water environments.
b. Can be easily installed into your exisng pool environment and
equipment, or can be customized to your needs.
c. Monitors and displays the pH and ORP levels using LEDs and
digital readouts on the front panel. If the temperature sensor is
installed, the M920CA will monitor temperature and display on
the front panel when in Temp mode. Addionally, it will monitor
up to two chemical tanks equipped with level switches and
displays status using LEDs on the front panel.
There are six separate funcon buons that allow simple
pushbuon control of these individual parameters:
1. Set Level – ORP or pH level to be maintained,
2. Dose Timer – Timed or connuous feed modes,
3. Delay Timer – Delay me between feed cycles,
4. Over Timer – Maximum feed cycles or me allowed,
5. High Alert – Maximum level of ORP or pH allowed,
6. Low Alert – Minimum level of ORP or pH allowed,
7. pH Cal – pH calibraon for variaon in pH sensors.
8. FAC Cal – Free Available Chlorine Calibraon
9. CYA Cal – Cyanuric Acid Calibraon/Entry
d. Displays the calculated Free Available Chlorine (FAC) in parts per
million (PPM) when connected to the IPS Controllers monitoring
website. The ORP / FAC display will alternate between the
current ORP and the last calculated FAC. FAC (PPM) calculaon is
not cered to NSF 50.
e. When the pH level rises above (acid feed) or falls below (base
feed) the set level, the controller will acvate the chemical
feeder for the set dose me. Then the set delay me will occur.
This dose and delay me will occur unl the set level is reached.
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