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Pulse Oximetry (SpO
2
)
Propaq Encore Reference Guide 145 Welch Allyn
Nellcor SpO
2
Specifications
Characteristic
Specification
a
a.When performing SpO2 monitoring, the monitor SpO2 channel may not (in rare instances) initially detect a damaged SpO2
sensor or extension cable (as described in EN865:1997, Section 51.109), but may simply display a flat line and no numerics. If
this occurs, try connecting a new SpO2 sensor (and extension cable, if needed) and restart the monitor to resume normal
monitoring.
Saturation (% SpO
2
)
Range
Resolution
Alarm Limits
b
b.Minimum difference between upper and lower alarm limits is 2%.
0% to 100%
1%
52% to 100% (upper)
50% to 98% (lower)
Probe Accuracy
c
(saturation levels
between 70% and 100%, 28° to
42°C)
Adult/Pediatric
Neonatal
c.Refer to the Welch Allyn
Products and Accessories
guide (810-0409-XX) for accuracy specifications for all Nellcor SpO
2
probes recommended for use.
Digit accuracy: ±2 counts
Digit accuracy: ±3 counts
Pulse Rate
Range
d
Alarm Limits
d.When using the pulse oximetry option with motion tolerance, a substantial and rapid (<2 seconds) drop in pulse rate may result
in erroneous pulse rate readings and loss of the audible pulse indicator.
Motion tolerant option: 25 to 249 beats per minute
Option without motion tolerance: 25 to 250 beats per minute
27 to 250 beats per minute (upper)
25 to 248 beats per minute (lower)
Pulse Rate Accuracy
No Motion
During Motion
±3 beats per minute
±5 beats per minute
Alarm Hold-Off Time Period 10 seconds; resets if the sensor reports levels within limits before 10
seconds elapses
Circuitry Microprocessor controlled
Automatic self-test of oximeter when powered on
Automatic setting of default parameters
Automatic alarm messages
Electrosurgery interference
suppression
Ye s
Sensor Compatibility Compatible only with Nellcor sensors listed in the Welch Allyn
Products
and Accessories
booklet.
Sensor LEDs
RED Wavelength
INFRARED (IR) Wavelength
660 nm (nominal)
890 nm (nominal)
Sensor Energies (Radiant Power)
Electrical Power
Optical Power
52.5 mW max.
15 mW max.
Pulse Rate Accuracy
No Motion
During Motion
±3 beats per minute
±5 beats per minute