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Welch Allyn 48 Propaq Encore Reference Guide
Noise on the signal
Noise on the ECG signal may be detected as pacer signals, causing the pacer indicator to
appear on the display. If you don't need to indicate pacemaker signals, you may want to turn
off the pacemaker indicator for a better display of the ECG waveform.
Using the Filter to Better Display a Waveform
The Propaq Encore includes a filter that reduces noise from the ac power signal and produces
a much clearer ECG waveform. To set the filter, press
SETUP, MORE, MORE, SERVICE, YES (to access
the Service Menu),
MORE, MORE, SETTINGS to display the Settings Menu. Select the FILTER
function with the
NEXT button and press the CHANGE button to change settings.
Set the filter to the ac mains frequency of your hospital (either 60 or 50 Hz).
ECG Messages
If a lead fault occurs, an ECG equipment alert typically shows which lead failed. Otherwise,
the Propaq Encore displays MULTIPLE in place of the failed leads.
ECG LEAD CHANGED. The Propaq Encore has automatically changed an ECG lead
due to a lead wire or electrode problem.
LEAD FAIL: REPLACE ELECTRODES. There is excessive offset on the ECG channel.
Warning The presence of much pacer-like noise can cause the displayed
heart rate to be erratic even though the ECG trace may look clean with the
pacer indicator off. Fix the noise problem by using fresh ECG electrodes and
an ECG cable whose lead wires make good connections.