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|  DSH 4297 p& g X! `; r/ W# A: U
% N/ \( H F% ]2 h5 V$ G5 p g | Thermocouple vs. resistance method. a* `( R7 D+ H! Z5 V Z
| 42" j# n& k, ?0 a6 J5 y
| 60601-1(ed.2);am1;am2
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( R1 h# H) v1 t4 WStandard(s)- (year and edition):# @* C6 ~9 S9 ~) d$ s+ |
IEC 60601-1:1988 Ed.2 Am1+Am2
1 Y7 |: i& G1 K7 C0 eSub clause(s): 42
) s1 \. c5 T# A1 f5 X5 L RSheet n°: DSH-429& i, A2 I' s: \8 Q7 f& |% N
Subject: Thermocouple vs. resistance method
: ~3 Q& |1 J% O; C) V- PKey words: Temperature, thermocouple, resistance method, windings
! |, k8 I. j2 h* vConfirmed by CTL at its 39th meeting, in Cologne @, @" q% ~# g8 e0 D/ e
Question:2 _, a [$ o5 A
Use of thermocouple instead of resistance method? Can the allowable values in Table Xa and
0 R: s) q, q0 w( N fTable Xb be reduced by 10°C if temperature determined by thermocouples (like IEC 60950
4 R% y' z* j7 Z- U5 u3 YCl.5.11, Ed. 2)?! R! @/ M6 O( s/ ~' j: R. _
Decision:: }) {5 R$ \5 r7 O2 c
The allowable maximum temperatures given in Table Xa and Table Xb apply, regardless of the
/ [9 w ]1 A2 E6 i5 M F1 Ztest method. However, the systematic errors and uncertainties in any measurement must be
# F9 T- N) R. z: _2 hconsidered when comparing the measured value to the required value. COR method should' P1 C- y/ q( l) {& ~2 K
be utilized whenever possible. If not possible, the allowable limit of Table Xa and Table Xb
8 P: [& @ \% A, O8 V1 Dmust be reduced by 10°C.& ~; `5 ^, g9 f. Q6 s- ^
/ p E" O3 l" I7 q+ b B( h$ k4 r; W+ F0 ~6 t0 E7 `. A
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发表于 2012-11-5 10:29
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