DSH 724 Measurement of Conductivity

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DSH 724 3 L/ J3 J/ ]* Y" ^+ ]5 z * G2 m6 V; x% |, A/ h

Measurement of Conductivity + _" Y9 }0 F! a& a9 t( d

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60112(ed.4)

9 D# i7 V0 C. F) R0 pStandard(s): IEC 60112/2003 No. Year
) h$ q, |, Y# G. ]! wEd. 4.0
4 S7 t; B# ?3 ~  A3 j# N9 TDSH
4 s  ~- q* P! {3 P0724
/ {5 F+ A6 ~9 c: `% ^6 y2008
% x6 s9 N' d0 M# TCategories: Various, General
Subclause(s): 7.3
Developed by: WG4
Subject: Measurement of
  D! A8 V+ ]: k0 y) F: yconductivity
Key words:
- Tracking solution
# ~+ f5 o, s3 H6 X: h5 k0 q- Conductivity
; j+ ?0 }8 _7 ]6 O$ K- IEC 60589
Decision approved at the
6 s% o2 K5 z; C" J46th CTL Plenary Meeting,
% b7 w1 A1 u. D0 a! v$ Z3 zin 2009
Question:
2 G8 g7 c2 D) k# G) j2 W" y/ pClause 7.3 requires that the conductivity of the tracking test solution “be measured with alternating
- O( P8 W7 D9 t# A/ Ivoltage at a frequency in the range 1 kHz to 2 kHz. The procedure is described in IEC 60589”.
3 F$ n4 O. {8 T  BThe 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.
2 j( T; n( I" o* o1 N. o  o1 N) EAre CBTL:
- (a) expected to use this method of measurement for solution conductivity; or
; g/ z& j+ r9 Z- (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.
5 W) w& ?, V. Q; z8 o8 K$ h6 y* v- CDecision:
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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