Impulse 6000D, 7000DP
Users Manual
24
Performing a Noise Immunity Test
This qualitative test verifies the pacemaker’s ability to filter
line frequency noise at either 50 or 60 Hz, and sense a
simultaneously applied simulated ECG signal. The
amplitude of the line frequency noise is user-adjustable,
while the simulated ECG signal amplitude is fixed.
To get to the Noise Immunity test from the Pacer Test
menu, press the softkey labeled More repeatedly until
Noise Immunity appears above one of the function keys.
See Figure 27. Next press the softkey labeled Noise
Immunity.
fak17.eps
Figure 27. Pacer Noise Immunity Test
There are three variables for the noise immunity test: ECG
Wave, Line Frequency, and Amplitude. The softkey
labeled ECG Wave toggles between on and off. When on,
an ECG wave is placed on the pacer leads along with the
noise signal.
The softkey labeled Line Frequency toggles the
frequency of the noise signal between 50 and 60 Hz.
Pressing the softkey labeled Amplitude, activates the
scroll box for setting the noise signal amplitude. Press G
or H to adjust the signal amplitude from 0 to 10 mV in 0.5
mV steps while watching the patient monitor. To set the
rate, press the softkey labeled Rate. A scroll box opens
where the simulated heart rate can be changed by
pressing G or H. When the desired rate is set, press the
Rate, Amplitude, or Back softkey.
Setting Analyzer Setup Functions
The Analyzer has a number of setup functions that are
user-adjustable. Press Qto open the setup main menu.
There are setup functions for the battery, display, sound,
instrument information, calibration, and diagnostics.
Setting Up the Battery
Press the softkey labeled Battery to access the battery
setup menu. See Figure 28. Through this menu, Auto
Power off can be set, the battery charger enabled and
disabled, and the battery can be trained. Once all the
battery setup functions are set, press the softkey labeled
Done to save the changes.
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