Operation With An Ecg Simulator - Philips M3921A Service Manual

Operation with an ECG Simulator

Note
Performance Verification
Nellcor Puritan Bennett Oxisensor II adhesive sensor, model D-25, is used to
examine LED intensity control. The red LED is used to verify intensity
modulation caused by the LED intensity control circuit.
1. Connect a M4787A sensor extension cable to the monitor.
2. Connect a D-25 sensor to the sensor extension cable.
3. Press the ON/STANDBY button
4. Leave the sensor open with the LED and photo detector visible.
5. After the monitor completes its normal power-up sequence, verify that the
sensor LED is brightly lit.
6. Slowly move the sensor LED in proximity to the photo detector element of the
sensor. Verify, as the LED approaches the optical sensor, that the LED intensity
decreases.
7. Open the sensor and notice that the LED intensity increases.
8. Repeat step 6 and the intensity again decreases. This variation is an indication
that the micro-processor is in proper control of LED intensity.
9. Turn the monitor off.
1. With the monitor off, connect the ECG leads to the appropriate jacks on the
ECG tester.
2. Connect the leads to the ECG cable.
3. Connect the cable to the ECG input port on the monitor.
4. Set the ECG simulator as follows:
Heart rate:
Amplitude:
Lead select:
Wave Type:
Patient Type:
The accuracy of the monitor's ECG measurements is ±5 bpm. In
the procedure below, add the tolerance of the simulator to the
acceptable range of readings.
5. Press On/Standby button
Hardware and Software Tests
to turn the monitor on.
30 bpm
1 millivolt
II
Normal sinus rhythm
Adult mode
to turn monitor on.
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