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Capnography (CO
2
)
Propaq Encore Reference Guide 149 Welch Allyn
Sidestream CO
2
Specifications
Characteristic Specification
Sensor Type Sidestream, internal
Principle of Operation Non-dispersive, infrared, single-beam, single path/wavelength,
ratiometric
Operating Ambient Temperature 5° to 40°C
Startup Time 30 seconds typical, 3 minutes maximum
Rise Time 240 ms (10% to 90%) at 175 ml/min
Delay Time 1.12 seconds maximum
a
a.Based on the following additional airway conditions: Sample line = 7 ft, 0.055 in ID (2.13 m, 1.4 mm ID);
Sample flow rate = 175 ml/min; Welch Allyn watertrap (new/unused).
Total System Response Time 1.36 seconds maximum (Rise Time and Delay Time)
Calibration Verify semi-annually, calibrate only as required
Sampling Chamber Internal (replaceable by service technician)
Pneumatic and Exhaust System Integral
Barometric Pressure Compensation Automatic
BTPS, ATPS, STPD
b
b.BTPS (Body Temperature and Pressure, Saturated), ATPS (Ambient Temperature and Pressure, Saturated),
STPD (Standard Temperature and Pressure, Dry).
CO
2
value = calculated CO
2
value x 0.977
Sampling Line 7-foot sampling line, ID 0.055 in (1.4 mm), for use with disposable
single-use cannula (CO
2
only or CO
2
sampling/O
2
delivery)
Watertrap Disposable single-use
Flow Rate 90 or 175 ml/min, user-selectable