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For greater accuracy, it is recommended to calibrate the ISE sensors frequently. The instrument
should be recalibrated when “ISE x Calibration Expired” (the “x” represents channel “1” or channel
”2”) message appears on the LCD, in the Reminder messages area.
Due to electrode conditioning time, the electrode must be kept immersed a few seconds to stabilize.
The user will be guided step by step during calibration with easy-to-follow messages on the display.
This will make the calibration a simple and error-free procedure.
PREPARATION
Pour small quantities of the standard solutions into clean beakers. If possible, use plastic beakers
to minimize any EMC interferences.
For accurate calibration and to minimize cross-contamination, use two beakers for each standard
solution. One for rinsing the electrode and one for calibration.
Note: To read concentration (not activity) ISA must be added to the standards and samples.
No corrections are needed due to dilutions.
CALIBRATION PROCEDURE
The ISE calibration and measurement can be performed with or without temperature compensation.
If the temperature compensation option is enabled, the isopotential point of the electrode must be
set in ISE Setup in order to perform correct concentration measurements.
Before calibrating, make sure that the appropriate Electrode Type has been selected in ISE Setup
according to the measured Ion/compound.
ISE Calibration screen description
ISE CALIBRATION (HI5222 only)
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