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Macro 900 Operation Manual
V3
10. MacroCal Calibration Method
10.1. About Calibration
Calibration is a very important part of successful water quality measurement
and should be carried out regularly as detailed in each separate section of this
manual. A great deal of development work has been put into simplifying and
automating the calibration procedures in the Macro 900 Meter in order to allow
normal field operatives (as opposed to trained lab technicians) to achieve quick
and accurate results.
As a general rule, pH and EC should be calibrated as close to 25ºC as possible.
Optical
electrodes
should
be
calibrated
as
close
to
their
deployment
temperature as possible.
In order to standardise calibration techniques, Palintest provide plastic
calibration bottles into which the MAP 2000/2100 can be directly inserted. The
MAP 2000/2100 is designed to be calibrated in these calibration bottles with
the Probe Sleeve, Sleeve End Cap and End Cap Plug fitted.
The Probe Sleeve, Sleeve End Cap and End Cap Plug form an integral,
working part of the Probe's measurement system, and MUST be fitted
during calibration and measurement for correct operation.
See section
Error! Reference source not found. Error! Reference source not found.
for
further details.
10.2. Special
Notes
Concerning
ISE
Electrodes
The high ionic concentration of pH
calibration solutions (buffers), including
MacroCal, can cause significant offsets in
ISE electrodes.
These offsets are temporary, but best
avoided because they can cause
significant errors during both calibration
and normal operation.
For this reason all ISE electrodes are
supplied with a red rubber sealing cap.
The caps should be fitted to all ISE Electrode when using MacroCal
in
order to protect the ISE electrodes from the effects of the buffer solution.
At all other times, the ISE electrodes should be left uncovered.
© 2013 Palintest Ltd.
www.palintest.com
Page 28 of 147
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