IPS Controllers M720 - Page 21

20
M720 pH/ORP Controller Owner’s Manual
ii. Press and hold Mode buon and then press Delay
Time buon (red ORP alert LED will come on) release
both buons. You are now in Set Over Timer mode.
iii. Use Up/Down buons to increase/decrease Over
Timer
iv. When nished, press Mode buon to connue
4. The Over mer is interlocked with the Dose Time
selecon.
i. If the Dose Time is set to a med cycle, the Over
Timer will count med feed cycles. Every me the set
level is reached the mer will reset its count. If the
preset cycle count is reached, the pH digital display
will ash, and the pH output relay will de-energize.
The controller must be reset manually by cycling out
of and back into Auto mode using the mode buon
(Default: 60 cycles)
ii. If the Dose Time is set to a connuous feed mode,
the Over Timer will count in minutes. (Default: 60
minutes)
5. When the Dose Time is changed from either med or
connuous feed, the Over Timer is reset to Default.
d. High Alert
1. Default: 900 mV
2. Selectable range: 650 mV to 900 mV, no OFF. A high
alert will occur if the ORP level remains above the
High Alert level for 10 connuous minutes, and will
automacally turn o the High Alert when the ORP
level falls below the high alert level for 1 connuous
minute. During High Alert, the ORP1 dose output will be
disabled.
3. Changing High Alert seng
i. Press Mode buon to enter ORP standby