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Single Channel ECG Test System | User Manual
2.6.5
Lead electrode impedance
Not used in Version 4.0. In version 3.0, the user could select to include 51k/47nF in
series with the output electrodes, as required in IEC 60601-2-51. However, all
standards are now harmonized and use the same test circuit, with 51k/47nF only in
RL (neutral electrode).
2.6.6
Pacing parameters
In general, a pacemaker pulse can be added to any main function
(sine/triangle/ECG etc.), with the following parameters:
Pacing Amplitude
This can be set in steps of 2 ranging from -700 to +700mV
When set to zero the pacing function is turned off
regardless of other pacemaker settings.
When set at +2 or -2mV the pacing pulse comes from the
main 1000:1 divider, which is accurate to better than
±1%. For settings above 2mV, the output comes from
Ch2, which has a design accuracy of ±1% or ±5mV.
Pacing Duration
Can be set between 0.1 and 2.0ms, covering the range
required by all standards.
Overshoot Time
Constant
Settings from 2ms to 100ms, creates an overshoot
according to Method A of IEC 60601-2-27 (0.25 of the
pacing amplitude or 2mV, whichever is smaller).
Pacing Rate/
Synchronized with
main function
If the “
Synchronized
with main function” checkbox is
ticked, the pacing pulse will be synchronized with the
main function, such as the ECG waveform in IEC 60601-2-
27.
If this box is not ticked, the user can set the pacing rate
independent of the main function (e.g. 80 bpm as
