IPS Controllers M920 Owner's Manual page 24

M920 & M920W pH/Dual ORP Controller Owner's Manual
i. If the Dose Time is set to a timed cycle, the Over Timer
3. Selectable range in timed feed: OFF, 20 – 100 feed cycles.
Selectable range in continuous feed: OFF, 20 – 180 minutes.
When the Dose Time is changed from either timed or
continuous feed, the Over Timer is reset to Default.
4. Turning off the Over Timer will void any NSF Certification 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 continuous minutes, and will automatically turn off the
High Alert when the ORP level falls below the high alert level
for 1 continuous 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 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.
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
functions will be disabled. Use the Up or Down arrow buttons to the
left to increase or decrease the function value.
will count timed feed cycles. Every time 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 flash, and the ORP output relay will de-
energize.
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