DSH 724 Measurement of Conductivity

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DSH 724

Measurement of Conductivity

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60112(ed.4) 6 Q9 J9 A( J$ r9 I

2 m! B2 y2 B, J4 aQuestion:
2 F/ j1 E/ m, t  P) h* L9 J) _Clause 7.3 requires that the conductivity of the tracking test solution “be measured with alternating voltage at a frequency in the range 1 kHz to 2 kHz. The procedure is described in IEC 60589”. The procedure in IEC 60589 utilises conical flasks with reflux condensors, platinised platinum electrodes, a conductivity cell and a resistance bridge. This appears to be a chemical standard rather than an appropriate electrical test laboratory measurement technique.
) a3 _6 l. D( ~1 m* i& eAre CBTL:
% ~  c9 j- L$ P% ^8 i# ^. D- (a) expected to use this method of measurement for solution conductivity; or
- (b) can a suitable conductivity meter with a measurement frequency in the range 1 kHz to 2 kHz be used; or
- (c) can any suitable conductivity meter (different measurement range) be used.
Decision:
The Group decided that the “use of any appropriate conductivity meter with sufficient accuracy and uncertainty including the probe” is the only practical one - item (c) above.

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