Calibrating Ec - palintest Macro 900 Operation Manual

Macro 900 Operation Manual

14.8. 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 Palintest MacroCal
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 Palintest
MacroCal solution. If this is not available, use a third party 1413µS/cm EC
Calibration Standard or PT 142/3 Mid Range Conductivity Solution. For taking
readings in brackish
(12.88mS/cm) EC Calibration Standard or PT 142/2 High Range Conductivity
Solution.
The Probe sleeve forms an integral, working part of the Probe's EC
measurement system, and MUST be fitted during calibration and
measurement for correct operation.
without the sleeve fitted, you will get the 'OUT OF CAL RANGE' error
message.
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.
2. Ensure the liquid level is all the way up to the neck of the
bottle.
Low liquid level will result in erroneous EC calibration.
3. Switch the Macro 900 Meter on and wait until the temperature and
EC measurements are completely stable.
4. Ensure the temperature of the solution is between 5ºC and 40ºC
(41ºF - 104ºF).
5. Press the MENU key then select Calibration. The following screen
will be displayed.
6. Select Full Cal. The screen will change to:
© 2013 Palintest Ltd.
or salt water,
Calibration
MacroCal
DO 100%
Full Cal
Calibration
pH/ORP
DO/EC
Aux Electrodes
www.palintest.com
use a third
If you try to calibrate the Probe
party 12,880µS/cm
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