DSH 724 Measurement of Conductivity

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DSH 724 7 d( O$ Y, P: k6 v. }: v5 }# g

Measurement of Conductivity

7.3

60112(ed.4) 9 k* m; V3 W7 o: @2 I  u/ }

Standard(s): IEC 60112/2003 No. Year
( W; d. _) f$ T: I5 A$ @Ed. 4.0
DSH
( U0 i) b" a) `# x- |) q0724
2008
0 c# V5 \# w) G# lCategories: Various, General
2 {" _/ G) t) z. A  S& x9 cSubclause(s): 7.3
# H5 D& r. ~" r7 _! m( _Developed by: WG4
Subject: Measurement of
conductivity
8 b/ b1 [: O1 \7 KKey words:
; G6 n8 ?4 h+ {) `$ W6 d- Tracking solution
6 ^; [# \3 {) p  N$ \# y5 j# O- Conductivity
/ m$ x/ H. ]5 h- IEC 60589
/ O% Z6 `7 x1 R2 V- E" J5 XDecision approved at the
46th CTL Plenary Meeting,
" ?; x/ M4 W, K# Q1 ein 2009
# o) W: p( T' V! p2 g7 g; hQuestion:
4 V  _7 u* m& H8 |8 U1 }5 [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
$ s5 I" F# H4 @; [; Q! f3 M8 u# j2 pthan 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
; L* J2 i' [! H/ W: Z! fbe used; or
- (c) can any suitable conductivity meter (different measurement range) be used.
1 x* V% X; s! W- }, ZDecision:
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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