c. Delay Time
1. Default: Delay me of 5 minutes between feed cycles
(med feed only). Aer dose me, the controller will
wait (delay) for the specied 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 automacally
reset. It must be reset by pressing the Mode buon to
cycle through the Standby mode and back to the Auto
mode.
2. The Over Timer is interlocked with the Dose Time
selecon.
a. 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 me will reset its count. If
the preset cycle 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 the Auto mode using the mode buon.
- Selectable range: 20 to 100 cycles
b. If the Dose Time is set to a connuous feed mode,
the Over Timer will count in minutes. Default is 60
minutes.
- Selectable range: 20 to 180 minutes
3. When the Dose Time is changed from either med or
connuous feed, the Over Timer is reset to Default.
4. Turning o the Over Timer will void any NSF
Cercaon and is not recommended for safety
reasons.
18
M820 pH/Dual ORP Controller Owner’s Manual
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