Mallinckrodt NELLCOR NPB-4000, Service Manual

Page: 85 / 219

Section 9: Specifications
9-3
9.5 MEASURING PARAMETERS
9.5.1 ECG Measurement/Display
Heart Rate Range: 20 BPM - 250 BPM
Heart Rate Accuracy: ±5 BPM
Bandwidth:
Normal
Monitoring: 0.5 Hz to 40 Hz
Extended Low
Frequency
Response: 0.05 Hz to 40 Hz
Leads: 3 Lead (user selectable)
Display Sweep
Speeds: 12.5 mm/sec, 25 mm/sec, and 50 mm/sec
Pacemaker Detection: Indicator on waveform display, user selectable
ECG Size
(sensitivity): 0.5 mV/cm, 1 mV/cm, 2 mV/cm, 4 mV/cm
Lead Off Detection: Detected and displayed
Input Impedance:
> 5 M
Ω
CMMR (common
mode rejection ratio): > 90 dB at 50 Hz or 60 Hz
Input Dynamic Range: ±5 mV AC, ±300 mV DC
Defibrillator
Discharge: <5 sec per IEC 601-2-27
Recovery: <8 sec per AAMI EC13-1992
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)
A 100 kHz square wave is used to inject
42 mA, p-p differentially between RA and LA.
Tall T-wave rejection.
3.1.2.1(c)
T-wave of 0.8 mV amplitude will not affect heart
rate determination.
Heart rate averaging.
3.1.2.1(d)
Averages six of the most recent eight detected R-R
intervals excluding the longest and shortest of the
eight intervals.