During the sensitivity measurement, the pacemaker pulse rate
selection depends on the waveform and the width selected. For
certain widths and pacer rates, the waveform may fall within the
refractory period of the pacemaker and will not be sensed. This
may produce an erroneous reading. Hence, the maximum pacer
rate must be set using the table below.
Waveform Refractory Maximum
Width Period Pacer Rate
msec
msec
ppm
200 <300 110
<400 90
100 <300 140
<400 110
40/25/10 <250 180
<300 170
<350 140
<400 110
2.5.7 Immunity Tests
A. Press the ‘ESC’ key to return to the previous menu.
B. Select Level 2 in the Main Pacer Test Menu.
C. Press the Imm ‘F2’ key for the noise immunity test.
Immunity Menu:
Imm ‘F2’ Key Pressed
N o i
s
e
I
m m u n i
t
y
6
0
H z
5
0
H z
F1
F2
F3 F4
D. Press the 60Hz ‘F1’ key for a sine wave of 60Hz
E. Press the 50Hz ‘F4’ key for a sine wave of 50Hz.
G.
The peak amplitude is displayed from 0 to 10 mV and may be
increased or decreased. The default setting is 5.7 mV. Each
EXPMT 2000 User Manual
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