Welch Allyn 420 Series - Pulse Rate Accuracy; Overpressure Cutoff; Temperature Ranges; Oxygen Saturation Range (Spo 2 %)

Spot Vital Signs 17
Pulse Rate Accuracy
SpO
2
Module Heart Rate: ±3.0 bpm
Blood Pressure Algorithm Heart Rate: ±5.0%
Overpressure Cutoff
315 mmHg ±15 mmHg
Temperature Ranges
Temperature Accuracy
Calibration accuracy: + 0.2 F (+ 0.1 C).
Temperature Determination Time
Oral: 4 seconds typical, 15 seconds maximum
Axillary: 10 seconds typical
Rectal: 15 seconds typical
Oxygen Saturation Range (SpO
2
%)
40-100% oxygen saturation
SpO
2
Accuracy
±3% in the range of 70-100% oxygen saturation (1 standard deviation)
<70% unspecified by the OEM
Battery Charging
The battery charges to 90%-100% capacity in 12 hours. Unit operates and charges battery simul-
taneously when connected to power source.
Mechanical Specifications
Dimensions
Height: 9.70 inches (24.64 cm)
Length: 5.72 inches (14.53 cm)
Depth: 4.73 inches (12.01 cm)
Weight
Approximately 4.25 pounds (1.91 kg)
Mounting
Self-supporting on rubber feet
Measurement Maximum Minimum
Temperature 109.4° F
43.0° C
86.0° F
30.0° C