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Capnography (CO
2
)
Welch Allyn 148 Propaq Encore Reference Guide
Mainstream CO
2
Specifications
Characteristic Specification
Mainstream CO
2
Sensor
Sensor Type Mainstream
Principle of Operation Non-dispersive, infrared, single-beam, single path/wavelength,
ratiometric
Warm-up time (CO
2
sensor and
monitor)
45 sec typical, 3 min maximum
Response Time 30 ms typical, 60 ms maximum
Waveform Rise Time <120 ms to 90% after step change
Calibration Verify semi-annually, calibrate only as required
Sensor Housing Temperature 42°C nominal
Mainstream CO
2
Sensor and Cable Dimensions and Weight
Sensor Height
a
a.not including cable
1.003 in
Sensor Width
a
1.036 in
Sensor Depth
a
0.78 in
Sensor Weight
a
< .39 oz
Cable Length 10 ft (3.05 m) nominal
Mainstream CO
2
Airway Adapter
Type Per ISO 3040, single-use
Size 15 mm ID, (meets ISO specifications)
Material clear polycarbonate, with sapphire windows
Added Deadspace < 6cc (.37 cubic inches) for adult model, <0.6 cc (.037 cubic inches) for
low deadspace model
Mainstream CO
2
Sensor Environmental Specifications
Operating Ambient Temperature 10° to 40°C
Storage Temperature -20° to 60°C
Operating Altitude -2,000 to 15,000 ft (-610 to 4,572 m), 817 to 429 mmHg
Storage Altitude -2,000 to 40,000 ft (-610 to 12,192 m), 817 to 141 mmHg
Operating and Storage Humidity 0% to 95%, noncondensing
Shock 100 g for 4 msec
Vibration 5-35 Hz, 0.015 in peak-to-peak,
35-100 Hz, 1 g acceleration
Drop 36 inches free fall to floor (tile over concrete, one drop each face, one
drop each edge/corner)