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lxxcumt 发表于 2015-8-7 15:30 0 x- s9 E, A8 V h
首先提出以下条款要求:
5 ?5 b( y: Z6 d8.4.1 * PATIENT CONNECTIONS intended to deliver current( X4 t4 |( j+ V3 j2 _3 P
The limits specifie ...
9 o+ `7 o4 d; I3 f& H1 H' V3 w首先纠正一下对于8.4.1的理解:功能电流确实没有限值要求,但是需要注意电流路径。对于FES,在激活输出时,功能电流是在各电极之间流动。漏电流是有要求的,只是测试时不要求激活输出,在standby情况下还是适用于通标中的漏电流限值要求。
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8 ^) t$ c [% O8 p$ h# B再说一下对于第2点的异议:5 J' k5 H2 }4 k1 s
standby的情况下,还是需要控制漏电流。首先功能电流是在指定频率范围内,50Hz/60Hz/DC频率的漏电流对人体还是有危害,不可混为一谈。既然专标定义为F型应用部分,那就都需要满足F type applied part的要求。首先看一下F type applied part的定义:“F-TYPE ISOLATED (FLOATING) APPLIED PART (herein F-TYPE APPLIED PART)6 C( P* B+ B, ~( w5 {$ ?/ f( x7 F
APPLIED PART in which the PATIENT CONNECTIONS are isolated from other parts of the% ~' D$ X% Y6 H; A; u/ Y7 v
ME EQUIPMENT to such a degree that no current higher than the allowable PATIENT LEAKAGE* M3 ?; l$ X$ f+ r- x$ n( W
CURRENT flows if an unintended voltage originating from an external source is connected to
( y/ @0 W' L+ O, ]the PATIENT, and thereby applied between the PATIENT CONNECTION and earth”。 其实本质要求还是floating from earth. 内部供电的设备本身就是floating from earth的,这并不矛盾。9 m& g" _- B% b+ ]5 T4 _ b
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