GE MAC 600 SPY, Service Manual

Page: 78 / 127

4-28 MAC
TM
600 Revision G
2047426-002
Maintenance: Check out Procedure
In all cases, the leakage current is measured from the floating (patient)
inputs jack of the device to ground. To setup the leakage current test:
1. Disconnect the safety tester from the line voltage.
2. Ground all signal input/output connections (all SIPs/SOPs connected
to ground).
3. Connect the patient cable/test plug to device.
4. Connect the patient cable/test plug to the safety tester.
5. Ensure that the person/tester in not touching the patient cable/test
plug or floating (patient) input or device conductive surfaces.
6. Connect the safety tester to the line voltage.
WARNING
PERSONAL SAFETY — MAINS VOLTAGE is applied to
floating input (patient connection) and patient cables/test
plug conductors and safety tester PATIN JACK. For the
protection of the person performing these tests, the
following values of resistor R may be used:

Type CF — 100 kOhm (220 to 240 V)
Disconnect safety tester from line voltage before connecting
patient cable/test plug to device.

After line voltage has been disconnected, connect the
patient cable/test plug to device.
During S.F.C., measurements should be taken under the following
conditions (refer to
“Electrical Safety Tests” on page 4-24):

Device in ON state

Polarity switch NORM and RVS

S1 (neutral) open

GND switch closed
The test has failed if the measured values are greater than:
After completing this test, disconnect the safety tester from line voltage
before disconnecting the patient cable/test plug and/or the device.
N.C. S.F.C
N/A Polarity: NORM &
RVS S1 (neutral): open
open GND: closed
Total tests/combinations: 0 Total tests/combinations: 2
N/A
50 uA (EC & UL)