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45
ISE Significant Digits
Accessing this option, the number of ISE significant
digits can be set, with one (X), two (XX) or three (XXX)
significant digits.
To set the ISE Significant Digits:
• Press
while in ISE Measure mode.
• Press
.
• Use
or to select the ISE Significant
Digits option.
• Press
and use or to
highlight the desired option.
• Press
to confirm your selection or press
to cancel operation.
ISE SETUP (HI5222 only)
Calibrate the instrument often, especially if high accuracy is required.
The instrument should be recalibrated:
• Whenever the pH electrode is replaced.
• At least once a week.
• After testing aggressive chemicals.
• When “Electrode Cond. Unknown”, “pH x Default Calibration” or “pH x Calibration Expired”
message appears on the LCD, in the Reminder messages area. The “x” represents channel “1” or
channel ”2”.
PREPARATION
Pour small quantities of the buffer 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 buffer
solution. One for rinsing the electrode and one for calibration.
pH CALIBRATION
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