DSH 724 Measurement of Conductivity

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DSH 724

Measurement of Conductivity 6 c4 K4 i, a, ?

7.3

60112(ed.4) 1 S: D! q2 Z2 a1 ?. O

Standard(s): IEC 60112/2003 No. Year
Ed. 4.0
( T; p( K' e8 Z; Z) gDSH
0724
2008
  y3 o4 c  y# k# NCategories: Various, General
Subclause(s): 7.3
Developed by: WG4
Subject: Measurement of
8 g3 F4 I% a, z- q# A- n4 ]% Zconductivity
Key words:
- Tracking solution
- Conductivity
& t5 C3 ]( N5 x: E/ _$ r- IEC 60589
Decision approved at the
46th CTL Plenary Meeting,
in 2009
; s1 v1 p8 U/ K! }9 c/ r: VQuestion:
1 `& I( Y9 m5 H2 h+ b( ]( ^% b: fClause 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”.
& j5 x& [( u& B( ]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:
9 j0 n4 i6 [, Q% g- j- (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
9 B' g' C7 d" k+ h0 fbe used; or
% i/ l' s( E1 V' @- (c) can any suitable conductivity meter (different measurement range) be used.
( M+ }  r) p, U2 U# v7 L- J2 {9 L' JDecision:
" u2 j" E4 ], X5 AThe 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.
0 m5 W7 n/ m: ^" d. k

+ R# q  I3 }; ~+ B8 }