GE FC091194, Руководство по обслуживанию

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GE M
EDICAL
S
YSTEMS
D
IRECTION
FC091194, R
EVISION
02 V
IVID
7 / V
IVID
7 PRO S
ERVICE
M
ANUAL
Chapter 10 - Periodic Maintenance 10 - 17
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.
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.
Figure 10-4 Test Circuit for Measuring Non-Isolated Patient Leads
Table 10-17 Testing Power Conditions
ECG Power Meter’s Polarity Switch Meter’s Neutral Switch
ON NORM CLOSED
ON NORM OPEN
ON REVERSE CLOSED
ON REVERSE OPEN
OFF NORM CLOSED
OFF NORM OPEN
OFF REVERSE CLOSED
OFF REVERSE OPEN
POWER
OUTLET
H (Black)
N (White)
G (Green)
Internal
circuitry
Insulating surface
Polarity reversing switch
(use both positions)
Appliance power switch
(use both "off" and "on" positions)
Patient connected leads
The connection is at service entrance
or on the supply side of a separately
derived system
Building
ground
Grounding contact switch (use in both
"open" and "closed" positions)
Current meter
H = Hot
N = Neutral (grounded)
G = Grounding conductor
H
N
G
Patient lead selector switch (if any)
(activated as required)
Appliance
Between each patient
lead and ground