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6 U+ ]( d2 y0 e4 SStandard(s): IEC 60112/2003 No. Year- s1 ~& q5 p) S" E
Ed. 4.0
, {& @$ U+ j( z& EDSH
: ] q0 e4 C7 O8 S4 [9 f2 k07249 Q( r' Y! p0 l& m! Z6 }
2008
, Y+ M, [3 Y! {7 B3 }3 z# TCategories: Various, General5 n, }$ ~$ `9 u9 s" A
Subclause(s): 7.32 I; a, Q1 P# o, u3 R+ \2 L% F# U
Developed by: WG4( c/ H" z2 f( X/ h# ~5 b' T$ }
Subject: Measurement of
2 Q: Z, y! j3 U9 y! Q) p( Iconductivity
: s$ X0 f' y+ n k6 `, NKey words:, B: t$ J& u1 ?" M/ r: E7 a
- Tracking solution
- {* u! f0 I. C0 H; {5 \- Conductivity
- c5 v1 \& f; d3 o- IEC 605897 S2 l0 p E- b
Decision approved at the
6 a: Q/ u' ~8 W/ g) X# U46th CTL Plenary Meeting,. @3 M% C5 t! _ b8 J' e
in 2009! y$ n3 j( P6 }/ } F1 }
Question:
( }9 ^" s, ?( Q2 fClause 7.3 requires that the conductivity of the tracking test solution “be measured with alternating5 H/ z2 Q& D' m+ _/ I& }
voltage at a frequency in the range 1 kHz to 2 kHz. The procedure is described in IEC 60589”.
+ e6 a5 u% r% O9 t' UThe procedure in IEC 60589 utilises conical flasks with reflux condensors, platinised platinum, n/ S: i8 ?5 N D. u5 A4 k
electrodes, a conductivity cell and a resistance bridge. This appears to be a chemical standard rather
; t3 V, M1 L0 \than an appropriate electrical test laboratory measurement technique.
- I, J$ u+ F# f6 WAre CBTL:
9 B, e& T3 d0 k5 Y- (a) expected to use this method of measurement for solution conductivity; or! L& j% K/ t; X
- (b) can a suitable conductivity meter with a measurement frequency in the range 1 kHz to 2 kHz+ C% N& y) C# q4 G$ u, y1 c' M8 ^
be used; or# k) r" Y6 s1 N' }
- (c) can any suitable conductivity meter (different measurement range) be used.4 \- G1 j+ l% q+ Z. }
Decision:
; R |$ S& z6 a, S, L" dThe Group decided that the “use of any appropriate conductivity meter with sufficient accuracy and
( L% a0 ?" ^1 q; ~3 S* W e/ luncertainty including the probe” is the only practical one - item (c) above.- b1 P7 z9 C0 I' I+ {% j( i/ Z# O
- n! b) w; u) q# ?' G% U9 V! }. i; _/ ?* W. W, y
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