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Single Channel ECG Test System | User Manual
other medical devices. The real ECG signal can
be monitored at BNC2:
50.102.15
Heart rate range,
accuracy, and
QRS detection
range
For this test, the “ECG 2
-
27” function should be
used, with the “T Wave” amplitude to zero,
while the heart rate (frequency), amplitude and
QRS duration are adjusted over the range
required by the standard.
The test for heart rates between 0-30bbpm
over 30s can be performed with the “Rate scan
(ECG)” check box
in the list of Special Functions.
For best results, the Main Function should be
“Off” before starting the test
. This function
starts at 3bpm (since 0bpm is infinitely long).
As for 50.102.13, there are a large amount of
combinations required for the main rate test.
An “Auto Heart Rate” function (see
2.6.9) has
been provided to reduce operator time in
testing. It is recommended to use only one
heart rate and vary the other settings
(amplitude and QRS duration). It should be
noted that main difficult of the patient monitor
will be at the lowest amplitudes (0.5mVpp) and
longest QRS durations (120ms), as this
produces the weakest slope which patient
monitors use to trigger the heart rate.
50.102.15
Heart rate range,
accuracy, and
QRS detection
range
Note: the waveform in Figure 119 is not a
simple triangle pulse and the peak of the
waveform is 0.875 of the amplitude setting.
Some manufacturers may have based their
Oscilloscope
Ch1
Ch2
Synchronization
pulse
Patient monitor
