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ii. Press and hold Mode button and then press Set Level
button (red ORP alert LED will come on) release both
buttons. You are now in Set Alerts mode.
iii. Press Set Level button again to display current High
Alert
iv. Use Up/Down button to increase/decrease ORP High
Alert
v. When finished, press Mode button to continue
e. Low Alert
1. Default: 100 mV
2. Selectable range: OFF, 100 mV to 640 mV. A low alert
will occur if the ORP level remains below the Low Alert
level for 10 continuous minutes, and will automatically
turn off the Low Alert when the ORP level rises above
the low alert level for 1 continuous minute. During Low
Alert, the ORP1 dose output will be disabled.
3. Changing Low Alert setting
i. Press Mode button to enter ORP standby
ii. Press and hold Mode button and then press Set Level
button (red ORP alert LED will come on) release both
buttons. You are now in Set Alerts mode.
iii. Press Dose Time button to display current Low Alert
iv. Use Up/Down button to increase/decrease ORP Low
Alert
v. When finished, press Mode button to continue
f. pH Cal disabled
5. Flow
a. The controller and flow cell are shipped pre-mounted to a
small (16” x 12”) or large (24” x 19”) ABS plastic board. The
integrated flow switch is pre-wired to the controller.
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M720 pH/ORP Controller Owner’s Manual