Measuring Parameters - Mallinckrodt NELLCOR NPB-4000 Service Manual

9.5 MEASURING PARAMETERS

9.5.1 ECG Measurement/Display
Heart Rate Range:
Heart Rate Accuracy:
Bandwidth:
Normal
Monitoring:
Extended Low
Frequency
Response:
Leads:
Display Sweep
Speeds:
Pacemaker Detection:
ECG Size
(sensitivity):
Lead Off Detection:
Input Impedance:
CMMR (common
mode rejection ratio):
Input Dynamic Range:
Defibrillator
Discharge:
Recovery:
Standards:
Meets the performance standards of ANSI/AAMI EC13-1992. Instead of a
1 mV standardizing voltage (section 3.2.2.9), a fixed, 1 cm reference bar is
always present in the ECG display, along with the ECG size setting expressed
in mV/cm. The following information references particular sections of
ANSI/AAMI EC13-1992.
Respiration, leads-off
sensing waveform.
3.1.2.1(b)
Tall T-wave rejection.
3.1.2.1(c)
Heart rate averaging.
3.1.2.1(d)
20 BPM - 250 BPM
±5 BPM
0.5 Hz to 40 Hz
0.05 Hz to 40 Hz
3 Lead (user selectable)
12.5 mm/sec, 25 mm/sec, and 50 mm/sec
Indicator on waveform display, user selectable
0.5 mV/cm, 1 mV/cm, 2 mV/cm, 4 mV/cm
Detected and displayed
> 5 MΩ
> 90 dB at 50 Hz or 60 Hz
±5 mV AC, ±300 mV DC
<5 sec per IEC 601-2-27
<8 sec per AAMI EC13-1992
A 100 kHz square wave is used to inject
42 mA, p-p differentially between RA and LA.
T-wave of 0.8 mV amplitude will not affect heart
rate determination.
Averages six of the most recent eight detected R-R
intervals excluding the longest and shortest of the
eight intervals.
Section 9: Specifications
9-3