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|  DSH 429/ [5 M, h- L; Z$ X2 e
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| Thermocouple vs. resistance method
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| 60601-1(ed.2);am1;am23 E1 S! l9 |, A- _# ~: W
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Standard(s)- (year and edition):
7 b( f- a0 w9 Y3 UIEC 60601-1:1988 Ed.2 Am1+Am26 g- d2 r3 T, m" D# T2 Z
Sub clause(s): 42
) r- ?& V6 w6 O; g/ E7 A( k2 BSheet n°: DSH-429
0 k3 G. _3 P. S6 ESubject: Thermocouple vs. resistance method5 `+ U% \9 A4 k& ]
Key words: Temperature, thermocouple, resistance method, windings6 D9 g# S1 x, T0 S1 o! \. q; {
Confirmed by CTL at its 39th meeting, in Cologne
7 F! N; I$ i, W3 |2 OQuestion:6 O. O+ e) P, H7 F) z/ }* \; l
Use of thermocouple instead of resistance method? Can the allowable values in Table Xa and
1 x6 l, v& @9 m' H& Y) e' N+ \6 eTable Xb be reduced by 10°C if temperature determined by thermocouples (like IEC 60950
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Decision:$ o, w V* d6 ^, t, C. B
The allowable maximum temperatures given in Table Xa and Table Xb apply, regardless of the
$ a! \4 \# o2 etest method. However, the systematic errors and uncertainties in any measurement must be0 P0 L ^$ N$ q; |3 ]% h
considered when comparing the measured value to the required value. COR method should* q1 f+ Q0 F2 k
be utilized whenever possible. If not possible, the allowable limit of Table Xa and Table Xb3 q/ e6 a6 e n! M
must be reduced by 10°C.
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