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GE M
S
EDICAL
YSTEMS
D
FC091194, R
IRECTION
10-7-6-2
Generic Procedure
Measurements should be made with the ground open and closed, with power line polarity normal and
reversed, and with the unit Off and On. For each combination, the operating controls such as the lead
switch should be operated to find the worst case condition.
The connection is at service entrance
or on the supply side of a separately
derived system
H (Black)
POWER
OUTLET
N (White)
G (Green)
Building
ground
Grounding contact switch (use in both
"open" and "closed" positions)
ECG Power
10-7-7
Isolated Patient Lead (Source) Leakage–Lead to Lead
Reference the procedure in the IEC 60601-1. When using the Dale 600, switch the meter's function
selector to the LEAD-LEAD position. Select and test each of the five ECG lead positions (except ALL)
on the LEAD selector, testing each to the power condition combinations found in the table. Record the
highest leakage current measured.
02
EVISION
Polarity reversing switch
(use both positions)
Figure 10-4 Test Circuit for Measuring Non-Isolated Patient Leads
Table 10-17
Testing Power Conditions
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Chapter 10 - Periodic Maintenance
Appliance power switch
(use both "off" and "on" positions)
Appliance
H
N
Internal
G
circuitry
Insulating surface
Current meter
Meter's Polarity Switch
NORM
NORM
REVERSE
REVERSE
NORM
NORM
REVERSE
REVERSE
V
7 / V
7 PRO S
IVID
IVID
Patient lead selector switch (if any)
(activated as required)
Patient connected leads
Between each patient
lead and ground
H = Hot
N = Neutral (grounded)
G = Grounding conductor
Meter's Neutral Switch
CLOSED
OPEN
CLOSED
OPEN
CLOSED
OPEN
CLOSED
OPEN
M
ERVICE
ANUAL
10 - 17
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