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Monitor Maintenance
Maintenance 13-9
Maintenance
Perform a
Start-up
Sequence
Test of the
System
The System automatically starts every time the system is switched ON.
TEST - Turn the System On by pressing the power switch in the lower left-
hand corner of the display.
RESULT - The system will click and light-up the LEDs on the control
panel. After several seconds, the LEDs will go off and the display will
start showing waveforms and numerics. If the system fails to boot, notify
your biomedical department or the Philips representative.
Verify the
Integrity of
the Display
Note the position of the contrast control on the V24 (or the brightness
control on the V24C/V24CT/V26C/V26CT) before starting tests so that they
are returned to their previous positions (assuming they are correct) at the
end of the testing procedure.
1. Set up an ECG signal from a fixed rate simulator on the screen.
2. Check the ECG complexes. They should be regularly spaced.
Uneven spacing indicates missing pixels. All portions of a simulated
ECG waveform should be clear and visible, including the P wave
and QRS.
3. Adjust the contrast control on the V24 (or the brightness control on
the V24C/V24CT/V26C/V26CT) so it is at the maximum setting and
then adjust to the minimum setting.
4. Check to see if any noise (interference) is superimposed on the
baseline with the ECG simulator attached. Baseline interference
may be apparent as a thick baseline at high gain settings.
5. Apply an external 1 mV pulse. The trace should exhibit a leading
edge with minimal rounding and a spike (or overshoot) of less than
10%. After 1 second, the pulse should have decayed no more than
half of its original amplitude.
6. Return the contrast control on the V24 (or the brightness control on
the V24C/V24CT/V26C/V26CT) to its previous position (assuming it
was correct). If any problems are identified, notify your biomedical
department or the Philips representative.