MiniWarden Manual
530-487-5007
22
pH Relay
In the Relay Setup Menu scroll down to pH and press
Enter
. The following
reviews each command within a pH Relay selection that is set up as acid
(change to base in the Relay control Types Menu).
Manual Time 00:02:00:
Is the amount of time you can set a relay to turn
on manually (Default Setting 2 Minutes). To turn the relay on manually
you have to do so in the service menu which will be covered in the next
section. When you turn on the relay manually in the service menu, the
relay will be on for 2 minutes in this case. To change the time, simply
enter the new time and press
Enter
to save.
Proportional 10%:
The Proportional %-Age (Default Setting 10%)
means that as the measured pH reading gets to within 10% (6.75 in this
ManualTime 00:02:00
Proportional 10%
On If pH > 7.5
On Delay
00:00:20
On Time
00:01:00
MinTimeOff 00:05:00
Off if RLY On-none Off
if Flow Off-1
SetOvrfeed 00:00:00
Overfeed
02:00:00
pH Relay Selected
case) of the pH setpoint of 7.5, the amount
of relay on-time will proportionally decrease
as the reading gets closer and closer to the
setpoint. Proportional feed helps to prevent
chemical overshoot. To change the %-Age,
simply press
Enter
, change the value and
press
Enter
to save the new setting. To
deactivate this feature set the %-Age to zero “0” and press
Enter
to save setting.
On If pH > 7.5:
This is the pH set-point
and the factory default setting is 7.5. The
relay will turn the chemical feed pump on if
the measured pH reading is greater than 7.5. The relay will turn on for the
programmed on time, in this case for 1 minute as set in the “On Time 00:01:00” command or less than
1 minute if the measured reading is within the proportional feed %-age of 10%. When feeding base, this
command is the only difference and will be
On if pH < 7.5
.
On Delay 00:00:20:
The on delay, in this case 20 seconds, is necessary to prevent the relay and,
hence the chemical feed pump, from turning on and off frequently if the sensor measurement fluctuates
back and forth from 7.5 and 7.6. It means that the relay will not turn on unless the condition of “On If
pH > 7.5” is satisfied for at least 20 seconds - then the relay will turn on for the programmed “On Time
00:01:00” in this case 1 minute. To change the on delay time, press
Enter
and change the time, press
Enter
to save the new setting. The value 00:00:00 disables the on delay.
On Time 00:01:00:
This is the total amount of time the relay will be ON if the “On If pH > 7.5” condition
has been satisfied. The default setting is 1 minute. This command works in conjunction with the
MinTimeOff Command below. If the pH reading is not being maintained then more or less on time may
be needed.
MinTimeOff 00:05:00:
This is the total amount of time the relay will be OFF if the “On if pH > 7.5”
condition has been satisfied. This is the amount of time allowed for chemical mixing in the pool and
works in conjunction with the “On Time” Command above. Do not set to 00:00:00 if the On Time is not
also set to 00:00:00 as they work together.
Off If RLY On -none:
The default setting is none or disabled. This feature prevents 2 relays being on
at the same time. It means this pH Relay will be Off if the ORP relay is On. This is useful in cases
where the chemical injection points are very close together and prevents the pH relay injecting at the
same time the ORP relay is injecting. Simply press
Enter
to toggle between ORP and none.
Off if Flow Off - 1:
The pH Relay will be turned off if “No Flow” is detected in Flow Switch Input 1.
Note
: This setting can’t be changed as it relates to safety, pressing the
Right Arrow
to change has no
effect.
