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English
19
26.0 Frequently asked questions
Question Answer
Why is the ‘’ or ‘’
ashing but the pump
is not turning?
The ‘’ or ‘’ will ash when ever the pH controller is in a dose cycle. This
includes the ‘OnTime’ and ‘OffTime’. The pump does not turn during the
‘OffTime’.
What are dosing
lockouts?
A feature that stops the pH controller from dosing if:
• The temperature probe measures a solution temperature of less
than 0 °C / 32 °F or more than 50 °C / 122 °F.
• The pH reading does not change after 15 dose cycles.
Do I need to use the
temperature probe
with ATC for pH?
You can omit use of the ATC probe if:-
1) You do not use EarthLink On setting to stabilise the pH value
2) Your solution temperature is stable and you calibrate the pH probe
in calibration solutions at the same temperature as the reservoir /
tank solution.
3) Your pH is close to 7.0 pH
Why should I use
earthlink?
To remove/reduce any “mains earthloop” issues affecting the pH value’s
stability.
How do I use Earthlink?
Ensure the ATC probe is installed and in the same solution as the pH
probe.
Press ‘∨’ to view status of pH mV value behaviour. Change the Earthlink
setting in MENU and watch the pH mV value again.
Select the Earthlink option that gives the least pH mV noise/variation.
If neither option improves pH stability:
1) Calibrate pH probe, see section 13.0.
2) Suspect Mains electrical problems. Obtain Electrician assistance.
How do I determine
the best Dose OnTime/
OffTime values?
Adjust OnTime such that 3 to 5 doses shifts the pH by only 0.1pH.
If <= 2 doses moves pH more than 0.1pH, you risk overdosing. (pH
changes past Required Value).
If it takes >=5 doses you will have a slow response to any changes. You
may also get “HELP” displayed if pH hasn’t moved enough if 15 dose
cycles.
If < 3 doses at 1 sec OnTime shifts the pH more than 0.1pH, you will need
to dilute the dosing solution to a lower concentration.
Adjust OffTime such that the last dose is fully mixed before the next
dose cycle starts.
If OffTime is too short, you risk overdosing (pH changes past Required
Value).
If OffTime is too long, correction to pH changes will take longer than
necessary.
How do I reset the
pH controller to “as
Shipped Defaults”?
Hold <cal> button down and apply power. Release button when “Restored
Factory Defaults” appears on screen.
How do I reset
pH calibration to
“Defaults”?
You shouldn’t need to. The pH probe can be calibrated anytime to the pH
controller. Follow the calibration steps in section 13.0.
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