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|  DSH 251B) J! }: W& l! L! _
5 G; B" F; J7 Y2 a1 T | Measurement accuracy$ s9 R. X& z, v* W$ D
| N/A
9 @ K; l' a% w; v; e# X, S2 Q! u# P* Q | Generality5 z0 _; F5 _: Z/ C8 g( j
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4 L, v# h, S2 i
Standard(s): Generality No. Year
( O- L% h9 I6 x5 T& K. c2 GDSH
$ X* [) {' `: k# c2 U; K251B
3 J; C8 V& L$ k" L+ c) \% e2009- ~ r4 `$ ~* ], L5 i, R0 j
Category: Various
7 u& w X; u- c- wSubclause(s): ---' j; {& a& M* ?% x# N
Developed by:
8 \) y$ b# x0 jWG4 – WG1
7 V, i* Q3 d3 X# B' I4 gSubject: Measurement accuracy Key words:
# k+ E( ~6 m" l- Measuring range5 }# k! o5 C6 u7 B
- Accuracy
6 v6 C! ]6 r' O4 n( D- Instrument0 P5 u% ~! v) z" z3 c
Decision confirmed at the 46th; Y/ Y% O. V0 _& H/ T
CTL Plenary Meeting, in 2009
" A: e- Z& F- Z4 R8 QInstrument Accuracy Limits
! l6 J2 P/ l, t5 X$ M7 m Y- y0 ]Measurement values stated in a CB Test Report shall be made with instruments with accuracies within; u5 r5 c; ^; s1 u9 j5 C
the limits stated below. These values apply unless more stringent requirements are given in the% l5 f7 ^: _9 S2 R& v% V
reference standard.* u& E+ e4 ^6 X* o! X [
Parameter Range Instrument accuracy of
* T& ?8 _% V6 o" q0 ZMeasuring Range
0 \& N7 g4 x* d1 eVoltage: r7 ~% T$ n/ [- \0 T" m
- Up to 1000 V up to 1 kHz ± 1,5%
i0 r6 u% N k: M \* Q' T1kHz up to 5 kHz ± 2%
: {8 s* q+ I0 Y, r5 kHz up to 20 kHz ± 3%; h: L1 v$ N# Y3 k4 V
20 kHz and above ± 5%
/ C. p4 z5 J2 J- 1000 V and above dc up to 20 kHz ± 3%4 K/ _- f e. K$ p( X/ P
20 kHz and above ± 5%
, g9 n, `/ o% A/ u; n" l+ sCurrent
$ z ^1 I! Q" PUp to 5 A dc up to 60 Hz ± 1,5%
, A" k+ e, M% [60 Hz up to 5 kHz ± 2,5%
$ G( A5 q6 T. B5 p2 w: @$ L6 n5 kHz up to 20 kHz ± 3,5%' g: A/ {+ z! g! \
20 kHz and above ± 5%2 a, K% s! _! i
5 A and above dc up to 5 KHz ± 2,5%* z+ O" Y2 [, D' A, H
5 kHz up to 20 kHz ± 3,5%
7 D; ^7 o6 l: S4 n8 b; G20 kHz and above ± 5%8 P; W9 W) B+ c O1 Y
Leakage current1 J* x' t, b6 F" V1 l; P& F! b
- up to 30 mA 50/60 Hz ± 3,5%; Z9 r8 W! H" D1 r, l6 W
- 30 mA and above 50 Hz - 5 kHz ± 5%
1 b$ R! E( r, _9 j& O; y. v4 LPower (50/60 Hz) up to 1 W ± 3%2 L" L4 s* g5 q! f9 g
1 W up to 3 kW ± 3%
* q! ^& D1 F4 @7 I3 kW and above ± 5%- ~# F* T/ t0 l1 c8 |: T z
Power Factor (50/60 Hz) ± 0,05
3 E3 f6 f5 C' l, T# f/ r8 m- tFrequency up to 10 kHz ± 0,2%/ u' X" w% l5 R0 P
Resistance 1 m up to 100 m and above 1 M up to 1 T ± 5%
& X" Z1 b! l; o9 R/ {% u! `above 1 T ± 10%! S r4 ?( i, f' m
for all other cases ± 3%
' O' T* }) n9 e+ PParameter Range Instrument accuracy of" N( _" \4 g, U; Q8 |, n
Measuring Range& }/ y+ K% j( l9 m
Temperature 1,2
# C- E) Y4 n h1 gbelow 100° C ± 2°C" [6 ?& b5 d' m$ Y( n/ @* o
100° C up to 500° C ± 3%
" g$ t3 i8 u& Z7 ^- 35°C down to – 50°C ± 3°C
9 j6 e# h. j. D' B+ }! O- {Time 10 ms up to 200 ms ± 5%
2 Q& l m P$ C7 V200 ms up to 1 s ± 10 ms
( z7 o" c3 E( g( B7 A1 H# d6 [1 s and above ± 1%
: h ?5 k* B6 p' C: H3 o: j: YLinear dimensions up to 1 mm ± 0,05 mm) Z) M7 A$ t) x2 L. D" [) u
1 mm up to 25 mm ± 0,1 mm' E& T: f4 h$ D/ p' \7 Q/ r& ?
25 mm and above ± 0,5%
7 r3 `& Z" u$ A5 m% P* ~' mMass above 10 g and up to 100 g ± 1%% R& n8 j: `) I2 L; }
100 g up to 5 kg ± 2%! W; `/ h+ ~4 P" T1 }$ v
5 kg and above ± 5%$ c$ u& S* X4 L8 A
Force for all values ± 6%1 A: y. }4 A$ P0 f6 D- `% _* _
Mechanical energy for all values ± 10%2 _8 u8 q) Z2 A5 G, z0 ]9 F3 ~
Torque ± 10%
1 S, |1 g# R* @, R2 t0 kAngles ± 1 degree, j" T2 B5 q, p& J# y$ T/ z* I
Relative humidity 30% to 95% RH ± 6% RH
1 |+ |' i. V7 F: nBarometric air pressure ± 10 kPa
6 s1 X3 a* U' e% `Gas & fluid pressure for static measurement ± 5%
/ E6 e2 x. _1 L# @, g* r1 Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”,
( r7 L R0 G9 g9 {- D5 F“T” and “ J”, premium grade, are recommended.
8 K0 k: y9 K- s/ v( ]% ~2 Not for measurements related to relative humidity.
0 a+ K- j2 g$ S; C, ~2 U5 C, u) k! f- `6 M& U/ P) }
) g6 b) K. `/ m4 b. b4 }- l
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