IPS Controllers M920 Owner's Manual page 25

M920 & M920W pH/Dual ORP Controller Owner's Manual
a. Set Level
1. Default: 640 mV
2. Selectable range: 400 mV to 890 mV (in 5 mV increments),
cannot be set for less than 10 mV below the ORP1 set level.
b. Dose Time
1. Default: OFF. In the timed dose cycle mode, the dose LED will
flash while dosing and illuminate steadily during the delay
portion of the timed cycle. In continuous dose mode, the
dose LED will flash while dosing, and dosing will continue
until ORP is 10 mV above Set Level.
2. Selectable range: OFF, CON (continuous), and Timed
(10 to 900 seconds ON)
c. Delay Time
1. Default: OFF. Delay time of 5 minutes between feed cycles
(timed feed only). After dose time, the controller will wait
(delay) for the specified minutes before checking the current
level and dosing again if necessary.
2. Selectable range: 1 - 99 minutes.
d. Over Timer
1. Default: ON. The Over Timer does not automatically reset. It
must be reset by using the mode button to cycle out of auto
and then back to auto mode.
2. The Overfeed timer is interlocked with the Dose Time
selection.
3. If the Dose Time is set to a timed cycle, the Over Timer 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 ORP2 output relay
will de-energize. ORP2 will not flash ORP digital display if
ORP2 overfeed occurs).
4. 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 con-
tinuous feed, the Over Timer is reset to Default.
23