Probe Calibration; Temperature Calibration; Ph Calibration; Orp Calibration - Neptune Systems AquaController II Owner's Manual

Go to the Setup:ORP Setup menu.
1.
Select ORP On
2.
Go to the Run menu at the top level. The ORP label and its
3.
current reading should be on the display.
To remove ORP from the AquaController II display follow the above
procedure and instead select ORP Off in step 2.

Probe Calibration

Calibration of the AquaController II is quite simple, and should be
checked at regular maintenance intervals to insure accurate operation.

Temperature Calibration

It is not necessary to calibrate the temperature probe of the
AquaController II. It has been properly calibrated at the factory to
maintain accurate temperature readings for the lifetime of the probe.
However, it is possible to make small adjustments to the displayed
temperature so that it is more closely correlated with another temperature
monitor. The following procedure should be used:
Note the amount that the temperature needs to be adjusted either
1.
up or down. For example, if the AquaController II temperature
reads 77.4 °F and the reference thermometer reads 77.0 °F, an
offset of -0.4 °F should be added to the AquaController II
temperature.
Go to the Setup:Temp Setup:Temp Calibration menu.
2.
Use the Up/Down buttons to enter the desired offset, which is -
3.
0.4°F in the above example. When finished push the Select
button.
Go to the Run menu and now the temperature should match the
4.
reference. If not, go back to step 1 and try again.

pH Calibration

Because of the variability in pH probes and the fact that they change over
time, it is best to calibrate the AquaController II' s pH circuitry. A two-
point calibration scheme is used to obtain good results. For the most
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AquaController II Owner' s Manual V1.00b
Copyright 1998/1999 - Neptune Systems
All rights reserved
accurate results it is best to use pH 7.00 and 10.00 solutions for salt water
and pH 4.00 and 7.00 for fresh water.
The following procedure outlines the steps necessary:
Go to the Setup:pH Setup menu. Enable or disable temperature
1.
compensation depending upon your requirements.
Select the pH Calibrate menu.
2.
Use the Up and Down buttons to select the lowest valued
3.
calibration solution. In order for the calibration procedure to
work correctly the lowest valued calibration solution must be used
first.
Place the pH probe into lowest valued calibration solution. Wait
4.
for the numbers on the bottom of the LCD screen to stop
changing. It does not matter what value is displayed only that it is
not changing. When the display stops changing press the select
button.
Rinse the probe in room temperature tap water.
5.
Use the Up and Down buttons to select the high valued
6.
calibration solution. Press the select button when the correct
value is displayed.
Place the pH probe into high valued calibration solution. Wait for
7.
the numbers on the bottom of the LCD screen to stop changing.
When the display stops changing press the select button.
The pH probe should now be properly calibrated.
8.

ORP Calibration

It is not necessary to calibrate the ORP probe of the AquaController II. It
has been properly calibrated at the factory to maintain accurate ORP
readings for the lifetime of the controller. However, it is possible to
calibrate the probe if so desired. Quinhydrone, pH 4.00 and pH 7.00
calibration solutions are required for the calibration. The following
procedure should be used to calibrate the ORP:
Create a saturated solution of Quinhydrone and pH 7.00
1.
28
AquaController II Owner' s Manual V1.00b
Copyright 1998/1999 - Neptune Systems
All rights reserved