3
Calibration
13
NOTES:
1
To protect from erroneous calibrations, the allowable tolerance is ±40%
of the factory default value. If calibration is attempted with standards
that fall outside this tolerance range, the error message
“Err 1”
is
indicated and meter will return to measurement mode. For example, a
40% tolerance of a 1413 µS/cm standard, is 848 µS/cm to 1978 µS/cm.
2
If the measured temperature (°C) of the calibration solution is below
0°C or above 50°C, the error message
“Err 2”
is indicated and meter
will return to measurement mode.
3
Low conductivity standard solutions (less than 20 µS/cm) are unstable and
are very temperature dependent. As a result, reproducible calibration results
are challenging in lowest measurement range (0.00 to 20.0 µS/cm).
3.5 Manual Calibration
In Manual Calibration mode you are not limited
to the conductivity calibration standards listed
previously in Table 1. This example shows a
manual calibration sequence using a 12.00 mS/cm
conductivity calibration standard.
1
If necessary, press
MODE
key to select
conductivity mode.
2
Rinse the probe thoroughly with de-ionised
water or a rinse solution, then rinse with
a small amount of calibration standard.
3
Dip the probe into the calibration standard.
Stir the probe gently to create a homogeneous
sample. Allow time for the reading to stabilise.
4
Press
CAL
to enter conductivity calibration
mode. The
[
CA
]
indicator will appear briefly,
then a value will appear flashing.
NOTE: To exit calibration without
confirmation, press CAL to return
to measurement mode.
Measurement Mode
