DSH 724 Measurement of Conductivity

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DSH 724

Measurement of Conductivity - O% ]: B+ F0 Q  m5 Y

7.3

60112(ed.4)

Standard(s): IEC 60112/2003 No. Year
Ed. 4.0
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0724
2008
Categories: Various, General
, U( s7 i5 s$ q& Z$ [  zSubclause(s): 7.3
) w2 C) e6 h( w  }$ U8 C0 wDeveloped by: WG4
# V) n2 _4 w8 e5 v: f. ?Subject: Measurement of
& n7 X" H' n6 _. Y3 t" U+ G+ Mconductivity
0 [* C. D" z4 gKey words:
- Tracking solution
- Conductivity
- IEC 60589
( |+ n7 T- F5 Y' A) @' XDecision approved at the
46th CTL Plenary Meeting,
in 2009
5 y) `& o1 n9 b; P3 n' ^1 GQuestion:
6 X+ Z( b! Z% ^& U/ z8 V3 n8 jClause 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”.
/ t1 S" H$ h  C5 F0 ]2 jThe 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.
/ J/ V% N$ w6 k1 _: y) iAre CBTL:
7 [4 G6 F# z4 r7 X. f, q( q- (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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