IPS Controllers M920 - Page 24

M920 & M920W pH/Dual ORP Controller Owner’s Manual
22
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 Over Timer will reset the count. If the set
(default is 60 cycles) Over Timer cycle is reached, the ORP
digital display will ash, and the ORP output relay will de-
energize.
3. Selectable range in med feed: OFF, 20 – 100 feed cycles.
Selectable range in connuous feed: OFF, 20 – 180 minutes.
When the Dose Time is changed from either med or
connuous feed, the Over Timer is reset to Default.
4. Turning o the Over Timer will void any NSF Cercaon and
is not recommended for safety reasons.
e. 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.
f. 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 connuous minutes, and will automacally turn o the
Low Alert when the ORP level rises above the low alert level
for 1 connuous minute. During Low Alert, the ORP1 dose
output will be disabled.
g. pH Cal disabled
4. ORP2 standby
Note: While inthismode,theyellowORP2standbyLEDwillilluminate,
boththepHandORPdigitaldisplayswillshowdashes,andallAuto
funconswillbedisabled.UsetheUporDownarrowbuonstothe
letoincreaseordecreasethefunconvalue.