Aquameter
™
Series Instruction Manual
10401-00188 Rev M
14.9. Calibrating EC
EC calibration is always carried out at a single point. There is a choice of three single
points. These are: 1413µS/cm, 2570µS/cm (using Aquaread RapidCal solution) and
12,880µS/cm. These values have been chosen to allow accurate readings to be taken in a
variety of water types.
For taking measurements in fresh surface or ground water, use Aquaread RapidCal
solution. If this is not available, use a third party 1413µS/cm EC Calibration Standard. For
taking readings in brackish or salt water, use a third party 12,880µS/cm (12.88mS/cm) EC
Calibration Standard.
Both halves of the Probe sleeve form an integral, working part of the Probe’s EC
measurement system, and MUST be fitted during calibration and measurement for
correct operation.
If you try to calibrate the Probe without the both halves of the
sleeve fitted, you will get error message 09.
For best results, calibrate as close to 25ºC as possible. The probe will compensate for
temperature variation in the Calibration Standard during calibration.
1.
Remove the storage cap from the pH electrode if fitted, wash the Probe in
distilled water, then drop the Probe into a calibration bottle filled with your
chosen EC Calibration Standard. The Sleeve End Cap should not be fitted.
Ensure the liquid level is all the way up to the threaded part of the
bottle.
Low liquid level will result in erroneous EC calibration
.
Refer to
2.
Switch the Aquameter on and wait until the temperature and EC
measurements are completely stable.
3.
Ensure the temperature of the solution is between 5ºC and 40ºC (41ºF -
104ºF).
4.
Press the
MENU
key then select
Calibration.
The following screen will be
displayed.
Calibration
RapidCal
DO 100%
Full Cal
5.
Select
Full Cal.
The screen will change to:
Calibration
>pH/ORP
DO/EC
Turb
6.
Select
DO/EC
. The screen will change to:
Calibration
DOZero?[01/Jan/09]
DO100%?[01/Jan/09]
EC2570?[01/Jan/09]
© 2011 Aquaread Ltd.
www.aquaread.co.uk
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