Metrohm Multi-Mode Electrode pro - Manual (Page 26)

3.6 Testing the electrode function
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6.1246.120 Multi-Mode-Electrode pro
3.6 Testing the electrode function
Note
If you use another software than 797 VA Computrace, then follow the
instructions on adjusting the needle valve in the manual of your instru-
ment.
Preparing the test
1 ￭ Fill 20 mL of water and a few drops of KCl-solution into the meas-
uring vessel.
DME test
1 ￭ In the 797 VA Computrace Software, open the Computrace
Control with Utility
▶ Computrace Control.
￭ Select the electrode type DME and switch on the electrode with
[New drop].
Mercury drops are continuously forming at the tip of the capillary,
which serve as the actual electrode.
2 ￭ Watch the drop formation.
Drop formation is functioning properly if the drop is falling from
the capillary at regular intervals.
SMDE test
1 ￭ In the 797 VA Computrace Software, open the Computrace
Control with Utility
▶ Computrace Control.
￭ Select the electrode type SMDE and switch on the electrode with
[New drop].
Mercury drops are continuously forming at the tip of the capillary,
which serve as the actual electrode.
2 ￭ Watch the drop formation.
Drop formation is functioning properly when each impact of the
knock-off mechanism removes an identically large drop from the
capillary.