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Standard(s): Generality No. Year8 k% R( o8 n6 u8 A7 F& N; X; X; d
DSH& T7 V" o. @% a7 W$ S0 _( `7 _
251B " x% i" Y; E3 u$ J% r+ @# d2009 , P' j# c3 P9 p: y' X/ ]' h! u5 NCategory: Various7 f1 f6 \" a B, S9 k1 C
Subclause(s): ---! \) K! r& N2 N) u* y
Developed by:# }+ E/ E4 j: t6 x0 q1 k" n- p
WG4 – WG1 0 Y6 |/ m) {' ~* tSubject: Measurement accuracy Key words:- S- B1 s% A! G7 N5 x, j4 l
- Measuring range. X$ c5 z9 X* H/ Q% ^
- Accuracy/ Q; |6 P0 i# s3 ^" i
- Instrument 4 G& E, ] J0 g% F/ [$ LDecision confirmed at the 46th y( E0 e& p9 P0 C# w
CTL Plenary Meeting, in 2009 . B, h: t+ o0 l5 v7 dInstrument Accuracy Limits" E( r9 p/ l2 W' q8 ]. V
Measurement values stated in a CB Test Report shall be made with instruments with accuracies within R# ^5 U0 ?5 ^4 e% _# t
the limits stated below. These values apply unless more stringent requirements are given in the $ a$ B% _* @ nreference standard.! I" k: m {% d3 H- V
Parameter Range Instrument accuracy of $ r( P1 a7 U# X4 g: @" xMeasuring Range " l+ }1 g0 |' ^Voltage3 K! y0 Y* M! g1 D; X. n( U
- Up to 1000 V up to 1 kHz ± 1,5%0 b' N- E) j5 B5 j) w
1kHz up to 5 kHz ± 2%2 X5 k5 Z. S; h" M b& E
5 kHz up to 20 kHz ± 3% ; H$ ^+ x. }- ^, F$ b20 kHz and above ± 5% 5 m6 w' C3 C0 f/ M: w( D- 1000 V and above dc up to 20 kHz ± 3% 5 ?7 x$ ~0 x3 ^ x8 w: B20 kHz and above ± 5% 2 k0 m9 i6 \8 x9 f' `Current O: m# f- |0 }2 F2 g/ ~" j
Up to 5 A dc up to 60 Hz ± 1,5% ' L1 ]3 d4 \7 d2 L. e60 Hz up to 5 kHz ± 2,5% ' u& |5 }, H* \* k5 kHz up to 20 kHz ± 3,5%! [* ^' r- F5 W( `, D% W# S9 l
20 kHz and above ± 5% ) A% T4 s, c0 n5 z2 N9 |5 A and above dc up to 5 KHz ± 2,5% : } e. i# x" @% ~5 d0 T) n5 kHz up to 20 kHz ± 3,5%; P& }, ]( u0 F4 ^! h
20 kHz and above ± 5% N5 X, ~8 d5 v+ eLeakage current . S$ Z( R- m. S" f9 K3 @- up to 30 mA 50/60 Hz ± 3,5%$ w9 X, X4 ?- \5 ~7 ]5 _
- 30 mA and above 50 Hz - 5 kHz ± 5% $ }1 L* N" E/ t. h# S: W( v' UPower (50/60 Hz) up to 1 W ± 3% 9 N: P* Y# h" E, Q1 W up to 3 kW ± 3% 3 ?+ h; ?2 o$ x3 kW and above ± 5% - v- u- g- F% r+ _4 a+ M1 oPower Factor (50/60 Hz) ± 0,05: U! F$ y7 Q# H9 B% ?+ r' w0 X
Frequency up to 10 kHz ± 0,2% 7 ^5 T2 S4 Y: E! B/ s" k# A AResistance 1 m up to 100 m and above 1 M up to 1 T ± 5%3 c* x* c8 l; A W* H! a5 n
above 1 T ± 10% % K/ m( V. {/ Z# \6 @/ ~3 g; N; Xfor all other cases ± 3% d( n% d* \5 V
Parameter Range Instrument accuracy of6 c) U- a( }. J% ?/ I# i
Measuring Range / L9 {8 R) y% k' }) J4 ]/ VTemperature 1,2 / V. F3 {2 M! s2 _4 Ebelow 100° C ± 2°C 0 J* {. l+ n" i. Z! B' Y100° C up to 500° C ± 3%: N+ h5 A9 D# J* }* |& y6 k
- 35°C down to – 50°C ± 3°C( _6 M( O) p' N" A8 R6 f5 S, \- M
Time 10 ms up to 200 ms ± 5% 9 G5 v0 ]5 Q5 M) i; k5 ]200 ms up to 1 s ± 10 ms6 k8 ~8 y& g. f4 {
1 s and above ± 1%, t' Z! L' D3 U0 V9 u
Linear dimensions up to 1 mm ± 0,05 mm 2 P1 w2 W( H | f; h1 mm up to 25 mm ± 0,1 mm & D2 s7 \; z0 ^5 d/ T25 mm and above ± 0,5% 0 |$ l2 T2 ~* j. ]: HMass above 10 g and up to 100 g ± 1%/ f& l- X9 ^. `" W. s
100 g up to 5 kg ± 2%' _6 k4 k" i# L* ]
5 kg and above ± 5%3 Q8 r6 Y7 f, i5 p9 Q' |: B
Force for all values ± 6%2 c" ?1 ~+ j# G# S: O7 U
Mechanical energy for all values ± 10% $ L3 U: _( G8 ~* ]$ k8 eTorque ± 10%$ O& K- V4 l7 f9 [- p& R5 z( E2 F
Angles ± 1 degree5 T2 P/ ~/ T' J0 y; Y1 t
Relative humidity 30% to 95% RH ± 6% RH! Z) U' [% L5 s+ j! m% a# ^- t
Barometric air pressure ± 10 kPa 5 m8 [ x# \, U dGas & fluid pressure for static measurement ± 5%$ {, {+ ?! j5 o* I5 m9 t( Y
1 Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, 9 \* ^+ h) s4 F6 m“T” and “ J”, premium grade, are recommended.3 [- `) i* s1 A0 W2 s: g" i
2 Not for measurements related to relative humidity.8 i* S% }) n$ O9 f( `
DSH 251B/ O& J1 w2 S6 H& t) m7 G