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|  DSH 4064 F- r( ^! p3 _6 O1 N
1 l/ z9 h5 u. ]* _+ \5 |6 x
| The adequacy of the knob/shaft mechanical link
' m' p* a5 e( r/ X | 56.10 b)
( c, Q8 c$ D) ~. @$ |3 W/ G | 60601-1(ed.2);am1;am25 }2 _6 U/ e* t& G
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& `3 L5 l. b! G# x$ gStandard(s)- (year and edition):7 d8 z, m p- t1 ^
IEC 60601-1:1988 Ed.2 Am1+Am2
+ N2 {9 |) M& L& K% _Sub clause(s): 56.10 b)- Q7 Z8 S3 ^( |: ^( K, i& `
Sheet n°: DSH-406 B0 {* S' T) \1 h
Subject: The adequacy of the knob/shaft mechanical link
' F/ k$ |8 g, D" B/ m k7 Q8 g wKey words: Knob, torque
( a5 |; V2 @5 f* g5 ~Confirmed by CTL at its 39th meeting, in Cologne
! n8 n; K+ J2 o2 @Question:% Z$ q, c. `! s# k1 p) F" W
a) The criteria is that the knob shall not rotate with respect to the shaft. This does not cover the
0 a# a4 X0 E# L6 _! @( k9 x$ \possibility of internal damage to the controlling device e.g. potentiometer.
! }6 ^: |2 ]; J! eb) The torque test values are too high. Maximum torque on a 10mm diameter knob was found n" @' x2 u7 i/ \% Q
to be <0.5Nm.% T( a# t7 D. n: V- [
Decision:
2 d: ]& {5 V7 I0 }* A$ i) y2 ]The torque test values in Table XIII are not excessive. This table could be re-examined in the Z4 }0 m" c9 ]
3rd edition of IEC 60601-1.- x' d- }& S- Q' g) J1 R3 a7 Z& e
6 b, I3 f4 F5 ^. @* H& y
7 m, s. Z) Z) F, y' K6 q; u |
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