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30
Specifications
ECG specifications
Characteristic
Heart rate detection range
Heart rate accuracy
QRS detection amplitude
Tall T wave rejection
Heart rate meter accuracy and response to
irregular rhythm
Response time of heart rate meter to
change in heart rate
Time to alarm for tachycardia
Data storage capacity
Pacemaker detection
A/D bit resolution
Dynamic range
Sampling rate
Welch Allyn Connex
Specification
20 to 300 beats per minute
±3 beats per minute or ±3%, whichever is greater
≥0.3 mV and ≤5.0 mV with QRS width of between 40 ms and 120 ms
Rejects Tall T waves less than 1.4 mV
The Heart Rate shall stabilize within 20 seconds and report the following
Heart Rates for data sets A.1 to A.4 with accuracy of ±5 BPM:
A.1 Ventricular bigeminy 80 BPM
A.2 Slow alternating ventricular bigeminy 60 BPM
A.3 Rapid alternating ventricular bigeminy 120 BPM
A.4 Bidirectional systoles 90 BPM
Increasing from 80 to 120 beats/minute: 10 sec
Decreasing from 80 to 40 beats/minute: 10 sec
Waveform B1
Amplitude – Average time to alarm:
•
0.5 mV – 10 seconds
•
1.0 mV – 10 seconds
•
2.0 mV – 10 seconds
Waveform B2
Amplitude – Average time to alarm:
•
1.0 mV – 10 seconds
•
2.0 mV – 10 seconds
•
4.0 mV – 10 seconds
24 hours
±2 mV to ±700 mV amplitude; 0.5 ms to 2.0 ms pulse width per EN
60601-2-27: 2011.
Rejects pacemaker signals, including double-paced signals, with over/
undershoot with the exception of pacemaker signals having an overshoot
with a time constant from 4 ms to 100 ms.
Note
For leads I, II, III only. The module does not detect or
display pacemaker pulses on lead V.
0.5 μV
±300 mV (95% gain accuracy)
250 ±2% samples per second
®
Devices ECG Module
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