|
|
|  DSH 429
( `4 q- C' H6 F5 }2 \! J8 n5 N* h+ ~$ F
| Thermocouple vs. resistance method+ i/ B+ t- f1 f- O7 e( Z
| 42, |* O) c, ?, g4 l6 l
| 60601-1(ed.2);am1;am2& N9 M, o/ b o8 V: Y: Y+ J0 O
|
% q! _/ d5 t3 G9 m; V/ qStandard(s)- (year and edition):, x' I: _5 r# Y
IEC 60601-1:1988 Ed.2 Am1+Am2
# o& t# q) y& N" [Sub clause(s): 42
; _# u7 w( w- @0 T6 b7 m9 CSheet n°: DSH-4297 Z/ }4 e* x1 Y" S
Subject: Thermocouple vs. resistance method
9 `7 K C2 \4 Q* x5 ~Key words: Temperature, thermocouple, resistance method, windings
& c& N0 ^1 e8 e/ DConfirmed by CTL at its 39th meeting, in Cologne
% D* ]7 [) k3 W' |' r8 hQuestion:# w( j- {# F- Z
Use of thermocouple instead of resistance method? Can the allowable values in Table Xa and
4 B9 a' O {% eTable Xb be reduced by 10°C if temperature determined by thermocouples (like IEC 60950
0 m$ E4 k4 Q4 R& TCl.5.11, Ed. 2)?
0 H v1 j' w1 k9 V. |8 V. ^$ D1 [Decision:9 i6 b' Z5 H3 u+ N9 C
The allowable maximum temperatures given in Table Xa and Table Xb apply, regardless of the6 E& b s( A: A) ]$ k1 i! C
test method. However, the systematic errors and uncertainties in any measurement must be
0 V5 ?8 n( n1 cconsidered when comparing the measured value to the required value. COR method should
4 j p3 N. o% [) S6 H2 Vbe utilized whenever possible. If not possible, the allowable limit of Table Xa and Table Xb
* R/ g1 K, g0 |! d1 v% ?7 `must be reduced by 10°C.
! T+ T& q3 k) B/ p. h
& a/ y; C" y6 B: S* C" X9 l* W2 i- H% B: ^6 j" Y
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发表于 2012-11-5 10:29
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