V Series Operating Instructions 29 - 19
Product Specifications ECG Performance
Heart rate meter does not trigger on signals having a QRS amplitude of less than 0.2 mV, or a duration
of 10 msec or less with an amplitude of 1mv in ADULT mode only.
34. Detectable QRS Width
70 to 120 msec, minimum for Adults and 40 to 120 msec, minimum, for Pediatric and Neonate
patients.
35. Minimum QRS Detection Threshold
0.16 to 0.48 mV for Adults and Pediatric setting range and 0.12 to 0.40 mV for Neonate setting range.
36. 60 Hz Voltage Tolerance
Heart rate meter is able to tolerate 60 Hz sinusoidal voltage less than or equal to 100 µV p-p RTI.
37. Drift Tolerance
Heart rate meter is able to tolerate triangular wave of 0.1 Hz, 4mV p-p RTI superimposed on ECG.
38. Time to Alarm for Cardiac Standstill
The time to alarm for a step change in heart rate from 80 BPM to 0 BPM, with lower alarm limit set to
closest to 60 BPM does not exceed 10 seconds.
39. Time to Alarm for Low Heart Rate
The time to alarm for a step change in heart rate from 80 BPM to 40 BPM, with lower alarm limit set to
closest to 60 BPM, does not exceed 10 seconds.
40. Time to Alarm for High Heart Rate
The time to alarm for a step change in heart rate from 80 BPM to 120 BPM, with the upper alarm limit
set closest to 100 BPM, does not exceed 10 seconds.
41. Tall T-Wave Rejection
Tall T-wave rejection is as per IEC60601-2-27:2011. The heart rate meter rejects all T-waves with
amplitudes less than 120% of a 1mV, 100 msec QRS, and a T wave duration of 180ms and a Q-T
interval of 350 msec.
42. Response Time of Heart Rate Meter to Change in Heart Rate
The response time of the heart rate meter to change in heart rate is less than 10 seconds for step
increase from 80 to 120 BPM and less then 10 seconds for step decrease from 80 to 40 BPM.
43. Time to Alarm for Tachycardia
The alarm response time for tachycardia is less than 10 seconds.
44. Pacer Rejection
The pacer rejection is in accordance with IEC60601-2-27:2011; the heart rate meter rejects all pacer
pulses of amplitude ± 2.0 mV to ± 700 mV and duration 0.1 msec to 2 msec with no tail.
When tested in accordance with IEC60601-2-27:2011, the 3/5 Lead ECG derived heart rate meter
rejects all pacer pulses ± 2.0 mV to ± 700 mV and duration 0.1 msec to 2 msec with tails of less than 2
mV and with time constants from 4ms to 100ms.
Pacer pulse detector rejection of fast ECG signals: 50 V/s RTI when measured in accordance with
IEC60601-2-27:2011.
45. Heart Rate Average
In compliance with the requirements in IEC60601-2-27:2011, the following method is used:
The average heart rate is calculated on the basis of the mean RR-interval of the last 16 beats, unless
the heart rate calculated using the last 4 beats is less than or equal to 48, then this rate is used.
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