Rf Power Shutdown; Change Battery Led - GE Marquette 418793-001 Service Manual

RF Power Shutdown

Change Battery LED

Revision D
MAINTENANCE: Checkout Procedure
This test verifies that the transmitter reduces its output when an all-
leads-fail condition lasts more than six seconds.
1. Connect the transmitter to an ECG source.
2. Install batteries in the transmitter.
3. At a central station verify that the transmitter is sending the ECG
source's signals properly.
4. Remove the leadwires from the ECG source.
After six seconds a NO TELEM signal should display for the transmitter
being tested (at the central station).
This test could also be done using the RF monitor to measure the
decrease in RF output under a LEADS FAIL condition.
This test verifies that the transmitter does indicate a low battery
condition if the battery voltage drops below 1.90V (±.04V).
1. Remove batteries from transmitter.
2. Connect the low-voltage power supply to the APEX RF test cable, pn
415817-001, or to the transmitter battery clips. (See diagram below
for test setup.)
3. Set the power supply output to 2.2 V or higher. The transmitter
should power up successfully and perform the self-tests.
4. Reduce the power supply output to 1.76 - 1.86V.
The CHANGE BATTERY LED should start to flash.
APEX Telemetry Transmitter
401566-166
3-7