Welch Allyn Connex ECG Module, Directions For Use Manual

Page: 35 / 41

Characteristic Specification
Mains filter 50 Hz, 60 Hz, off (default = 60 Hz)
Frequency range 0.5 to 70 Hz
Power source USB (4.5 V to 5.5 V)
Digital data interface Serial (USB – Full Speed)
Monitoring period Continuous
ECG channels Supports 3-lead or 5-lead
Sweep speed 25 mm/sec, 50 mm/sec
Resolution 14 bit ECG data, 30 mV peak-to-peak dynamic range minimum
Lead-off detection 3-lead or 5-lead
Applied currents Lead connection failures are detected by a bias current with respect to
the reference electrode.
User-adjustable parameters See Alarms
ECG cable specifications
Characteristic Specification
Connector at ECG module 80 in. ±1 shielded cable to a 24 in. ±1 lead fan-out to electrode
connection
ECG cables 3-lead or 5-lead to snap connection
Patient cables Conforms to ANSI/AAMI EC53
Impedance respiration specifications
Characteristic Specification
Impedance Respiration accuracy ±2 breaths per minute or ±2%, whichever is greater
Range 5 to 100 breaths per minute
Breath detection range 0.4 ohms to 3.0 ohms
Respiration lead source Lead II (right arm and left leg)
Note Respiration can only be acquired from Lead II.
Respiration, leads-off sensing and active
noise suppression (applied currents)
Respiration – Excitation signal characteristics Less than 25 uA RMS at
31 kHz pseudo sine wave
Lead off – DC current of 50nA max for RA ,LA, LL, V; 200nA max for RL
Directions for use Specifications 31