Welch Allyn Vital Signs Monitor, Propaq Encore - Quick Reference Guide - Manual (Page 105)

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Specifications
ECG
The ECG channel meets all the requirements for Cardiac Monitors Heart Rate Meters and
Alarms specified ANSI/AAMI EC13-1992, except for Standardizing Voltage (section
3.2.9.9). The channel also meets the American National Standard, Safe Current Limits for
Electromedical Apparatus (ANSI/AAMI ES1-1993).
Characteristic Specification
Connector AAMI 6 pin or Hewlett-Packard compatible 12-pin style connector (optional). (See the
illustration at the bottom of this table.)
Selectable Leads I, II, III, aVR, aVL, aVF, V
Lead Fault Indicator LA, LL, RA, RL, C, multiple
ECG Size (sensitivity) in mV/cm 4, 2, 1, 0.5, 0.2
Display Sweep Speeds 12.5, 25, and 50 mm/sec
QRS Tone Volume High, Low, Medium, Off
QRS Tone Frequency 900 Hz. for Propaq Encore without Expansion Module, 665 Hertz when equipped with
SpO2 but SpO2 not being monitored; variable pitch with SpO
2
option and SpO
2
being
monitored
Freeze Buffer 3.9 seconds at 25 mm/sec
Bandwidth 0.5 to 40 Hz in Monitor Mode; 0.05 to 40 Hz in Extended Mode (see Real-Time ECG
Analog/Defib Sync specification).
Sample Rate 364 Hz
Input Protection Electrosurgery and defibrillator protected when used with specified ECG cables. All
models also include electrosurgery interference suppression.
Lead Fail Sense Current 50 nA dc for active leads
100-200 nA dc for driven lead, depending on number of electrodes attached
Tall T-wave Rejection Meets and exceeds AAMI (USA) EC13-1992, section 3.1.2.1.c, for 1.2 mV T-wave and
1 mV QRS using AAMI test waveform.
Common Mode Rejection <1 mV p-p RTI for 10V rms, 50/60 Hz input, 200 pF source impedance, input
unbalanced, FILTER function OFF
<0.1 mV p-p RTI for 10V rms, 50/60 Hz input, 200 pF source impedance, input
unbalanced, FILTER function ON
Input Impedance >2.5 M

differential @ 60 Hz
Input Range (ac) 10 mV peak to peak
Input Range (dc) Up to ± 300 mV
System Noise
30 µV peak-to-peak, R.T.I., with all inputs = 47K in parallel with .047 µF.