64
MD5 EM0
UL544NP
、
UL484
、
UL923
、
UL471
、
UL867
、
UL697
Medical Equipment.
MD6 EM3
UL1563 Electric
Spas,
Equipment Assemblies and
Associated Equipment.
MD7
IEC60950
、
IEC61010-1 Fig A.2 (2Kohm) Information Technology.
Laboratory Equipment.
(For Opt. 752)
External EM8
External External
Frequency
Check
EM9
The Touch Current test can be configured to
verify the bandwidth of the leakage current
“voltmeter”, by setting the Probe
configuration, Probe-HI to Probe-LO, and
selecting the medical device “Frequency
Check”.
The selection is intended to be used for
meter verification only and has no
application for normal testing.
Circuit Diagrams
The following diagrams show the equivalent circuit of the measuring devices. Leakage current
readings are generated by measuring the voltage drop across these networks and dividing by
the equivalent DC resistance. The voltmeter is placed across the entire network of the
measuring devices3
、
4
、
5
、
6 and 7. The voltmeter is placed across the points indicated by the
solid black dots on measuring device 1 and 2. The points are specified by the agencies that
require a particular measuring device to meet their specification.
MD 1
：
IEC60990(Fig 4 U1 & U2)
、
IEC60950-1
、
IEC60598-1
、
IEC60065
、
IEC61010
MD2
：
IEC60990(Fig 5 U1 & U3) , IEC60598-1 MD3
：
IEC60601-1
MD4
：
UL544P MD5
：
UL544NP
、
UL484
、
UL923
、
MD6
：
UL1563
UL471
、
UL867
、
UL697
A
B
A
B
U3
500
1.5K
0.22uF
10K
20K
0.0062u
0.0091u
U1
0.22uF
0.022uF
500
Ω
1.5K
Ω
10K
Ω
A
B
U1
U2