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标准上有的:
- l: ]$ E0 O7 R5 R' K' GTo allow for the fact that the average temperature of windings of universal motors, relays, solenoids and
* f5 _* C$ j U. [* L" q2 Wsimilar components is usually above the temperature at the points on the windings where thermocouples are) S# F, S) X: i* ~* D+ B6 F# E
placed, the figures without parentheses apply when the resistance method is used and those within
# M+ v$ L# R3 M1 }5 a5 Rparentheses apply when thermocouples are used. For windings of vibrator coils and a.c. motors, the figures
& }8 B) r5 p7 T4 ^ V0 P; `3 }5 fwithout parentheses apply in both cases.5 i8 t. j0 ?0 _( q& B: L4 ^
......2 T6 _- k- i. J
简单来说,基本上括号内的适用于热电偶发,括号外适用于电阻法 |
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