Patient (Sink) Leakage Current - GE Transport Pro Service Manual

Patient (Sink) Leakage Current

Revision A
Checkout: Electrical Safety Tests
whereas the normal condition (ground closed) is less.
This procedure only applies to Class I (grounded/earthed) equipment,
and measures the leakage current from a mains voltage source into the
ECG/RESP connector.
1. Configure the leakage tester like the circuit shown below with GND
switch CLOSED and polarity switch NORM.
Leakage Tester
HIGH
LOW
GND
120K
0.15µF
1K
DMM
10
DMM set to measure AC voltage
WARNING
Shock hazard. The following step causes high voltage at
the test body. Do not touch the test body.
2. Set power switch on the device to ON.
3. Read leakage current indicated on DMM.
4. Change the leakage tester polarity switch to the RVS position.
5. Read the leakage current indicated on the DMM.
NOTE
If either reading is greater than the appropriate specification below,
the device under test fails. Contact GE Technical Support.
10 µA (0.01 volts on the DMM) at 120 V AC using the test body.
20 µA (0.02 volts on the DMM) at 240 V AC using the test body.
50 µA (0.05 volts on the DMM) at 120-240 V AC using the ECG
cable.
NOTE
The 10 and 20 µA limits are based on internal design standards. The
50 µA limit is common to all standards. AAMI ES-1 standard
requires using the patient cable.
6. Set the power switch on the device to OFF.
Transport Pro
2012659-042
NORM
Power Cord
RVS
GND
Closed
ECG Test Body
or ECG Cable
(Keep cable length as
short as possible.)
Device
Under
Test
005A
9-9