Instruction Manual
pH 5/6 & Ion 6
12
3.3 Ion Calibration (For Ion 6 only)
The Ion 6 meter is capable of up to 3-point ion calibration (minimum 2 point) with
standard solutions to ensure accuracy across the entire range of the meter.
To exit calibration after you have first entered into ion calibration, press CAL key again.
No ion calibration values are stored into the meter’s non-volatile memory. Note that ion
calibration data is lost once the meter is reset when the batteries are being removed
and replaced.
If one calibration point is performed an error message “
Er2
” is displayed after the single
point calibration is completed. Recalibrate using minimum of 2 points.
Calibration values are successfully stored if the ISE (Ion Selective Electrode) slope is
within the specified tolerance of 15-90mV/decade, otherwise an error message “
Er3
” is
displayed.
If any of calibration points are not within 1 decade, an error message “
Er4
” will be
shown at the end of calibration process. The ion calibration options available include
0.1, 1.0, 10.0, 100.0 ppm. Recalibrate and ensure that all calibration points must be at
least 1 decade apart from each other.
Ensure that you use new or fresh standard solutions during calibration. Do not reuse ion
standard solution as it may be contaminated and affect the calibration and accuracy of
measurements. Always store standard solutions in a dry, cool environment if possible.
Check that your ISE and ion standard solutions are kept in good conditions, otherwise
erroneous readings may be taken.
Before use, remove any plastic protective cap of ISE (at the tip of sensor) and read
manufacturer’s instructional manual. Briefly rinse the electrode with clean deionised
water to remove any residues.
Rinse probes before and after each calibration or sample measurement to avoid cross-
contamination. For more details please refer to Manufacturer’s care and maintenance
guide.
