CN 500 / CN 800
Conditioning, calibration, measurement
ba15356e03
09/2014
5
Conditioning, calibration, measurement
General
information
When operating the electrode ensure that
the filling opening (1) for the bridge electrolyte is open
the inner junctions (3) are covered with bridge electrolyte
no air bubbles are in the bridge electrolyte
the depth of immersion is within the optimum range:
Before measuring
The conditioning time depends on the previous history of the ion sensitive
electrode. Connect the electrode(s) to the meter and switch to the measured
value display (see operating manual of the meter). The ion sensitive elec-
trode is sufficiently conditioned when the measured value no longer changes
considerably under otherwise constant conditions (temperature, composition
of the solution).
NOTE
Avoid measuring samples with cyanide concentrations of more than
Minimum depth of im-
mersion
The ground junction (4) must be covered
Maximum depth of im-
mersion
Approx. 1 cm below the fluid level (2) of the
bridge electrolyte
1
2
3
4
CN 800
R 503 + CN 500
1
Condition an ion sensitive electrode in standard solution before using
it. To achieve a good responding behavior, the concentration of the
standard solution should be similar to the concentration expected of
the test sample.
2
Remove any air bubbles in the bridge electrolyte by slightly knocking
against the shaft.
3
Calibrate according to the operating manual of the meter and the
analysis specification.
