Nonin 8500 Troubleshoot Manual (English)

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Questions and Answers:

Jessica GonzalesAug 25, 2025

What to do if the displayed pulse rate on Nonin Medical Equipment doesn't correlate with the ECG monitor?

S
Sandra LeblancAug 25, 2025
If the displayed pulse rate does not correlate to the pulse rate displayed on the ECG monitor, it could be due to excessive motion at the sensor site (eliminate or reduce the cause of the motion or reposition the sensor), the patient may have an arrhythmia (assess the patient), a non-compatible sensor is being used (replace the sensor with a Nonin- branded PureLight sensor), or the ECG monitor may not be functioning properly (assess the patient).

Nonin 8500 Specifications

Operating Environment

operating temperature range	-20 to +40 °C
storage temperature range	-40 to +70 °C
operating humidity range	10 to 90% noncondensing
storage humidity range	10 to 95% noncondensing
operating altitude	Up to 4, 000 meters
hyperbaric pressure	Up to 4 atmospheres

Power

battery type	Six 1.5V AA-size alkaline batteries
battery life at maximum display brightness	100 hours
battery life at normal display brightness	160 hours

Display and Indicators

oxygen saturation display range	0 to 100% SpO2
pulse rate display range	18 to 321 BPM
pulse quality indicator	LED, tricolor
numeric displays	3-digit 7-segment LEDs, red

Measurement Specifications