DSH 724 Measurement of Conductivity
http://decisions.iecee.org/icons/ecblank.gif DSH 724
Measurement of Conductivity
7.3
60112(ed.4)
Standard(s): IEC 60112/2003 No. Year
Ed. 4.0
DSH
0724
2008
Categories: Various, General
Subclause(s): 7.3
Developed by: WG4
Subject: Measurement of
conductivity
Key words:
- Tracking solution
- Conductivity
- IEC 60589
Decision approved at the
46th CTL Plenary Meeting,
in 2009
Question:
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.
Are CBTL:
- (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.
页:
[1]
