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  • Operator's Manual - WristOx2 3150 with USB View PDF

  • Utilities and Drivers - WristOx2 3150 with USB View Folder

  • Operating Instructions - 3150 Memory Clear Application View PDF

  • WristOx2 3150 Pulse Oximeter: Use/Battery Change View Video

  • Spec Sheet - WristOx2 Model 3150 USB View PDF

  • Disposable Wrist Strap Instructions - WristOx2 Model 3150 USB View PDF

  • WristOx2 for Sleep Studies View PDF

  • WristOx2 for Ambulatory Monitoring View PDF

  • Sensor Compatibility Guide View PDF

If these solutions do not correct the problem, please contact Nonin Technical Service at (800) 356-8874 (USA and Canada), + 1 (763) 553-9968, or +46 650 401500 (Europe). View Product Customer Support. Nonin Medical, Inc. 13700 1st Avenue North Plymouth, Minnesota USA +1 (763) 553-9968 (800) 356-8874 (USA and Canada). Install any needed USB driver.


  • Understanding Accuracy, Bias, and Variability in SpO2 Readings View

  • PureSAT SpO2 Averaging View

  • Nonin Medical’s WristOx2® Model 3150 Beats VirtuOx VPOD in Hypoxia Testing View

  • Accuracy and Superior Performance of PureSAT and PureLight Oximetry Technologies View

  • Using Overnight Pulse Oximetry to Manage Oral Appliance Therapy (OAT) during Treatment for Obstructive Sleep Apnea View

  • Accurate Oximetry Monitoring – See the Technology Difference View

  • Pulse Oximetry at Home View

WristOx2® Model 3150 with USB Specifications

Oxygen Saturation Display Range: 0% to 100% SpO2
Pulse Rate Display Range: 18 to 321 beats per minute (BPM)
Numeric: 3-digit LCD
Pulse Strength: Pulse Strength Bar Graph

Nonin medical drivers

Accuracy – Sensors: Declared accuracy data for compatible sensors can be found in Nonin’s Sensor Accuracy document.
Measurement Wavelengths and Output Power**:
Red: 660 nanometers @ 0.8 mW maximum average
Infrared: 910 nanometers @ 1.2 mW maximum average

** This information is especially useful for clinicians performing photodynamic therapy.

Operating: -5 °C to 40 °C (23 °F to 104 °F)
Storage/Transportation: -40 °C to 70 °C (40 °F to 158 °F)
Time (from storage) for monitor to be ready for its intended use: 10 minutes to warm from -40 °C to -5 °C
10 minutes to cool from 70 °C to 40 °C
Device temperature will not exceed 41°C as measured during a controlled environment test.

Operating: 10% to 95% non-condensing
Storage/Transportation: 10% to 95% non-condensing

Operating Altitude: Up to 4,000 meters (13,123 feet)
Operating Hyperbaric Pressure: Up to 4 atmospheres
Power Requirements: Two AAA (1.5V) batteries

Battery Life (expected minimum):
NOTE: Based on testing new and fully-charged batteries. See
footnotes for brands used. Refer to battery manufacturers’
operator’s manuals for instructions for use.
Alkaline AAAa)Rechargeable AAA (700 mAh)bRechargeable AAA (1050 mAh)c
Storage: MVI Display Mode off:
MVI Display Mode on:
9 months
25 days
Not specifiedNot specified
Operating without Bluetooth Connection, continuous use:53 hours36 hours52 hours
Operating with Bluetooth Connection, continuous use:44 hours24 hours31 hours

Dimensions (without sensor or wristband): 51 mm x 73 mm x 19 mm (H x W x D)
(2.0 in. x 2.9 in. x 0.75 in.)

Weight (with batteries and wristband): 70.0 g (2.5 oz)
Type: Non-volatile
up to 1,080 hours (4 sec. data storage rate)
up to 540 hours (2 sec. data storage rate)
up to 270 hours (1 sec. data storage rate)


Classification per ANSI/AAMI ES60601-1 and CAN/CSA-C22.2 No. 60601-1:
Type of Protection: Internally powered (battery power)
Degree of Protection: Type BF-Applied Part
Mode of Operation: Continuous
Enclosure Degree of Ingress Protection: IP33

This product complies with ISO 10993-1, Biological evaluation of medical devices – Part 1: Evaluation
and testing.

a.Batteries used: Harding Alkaline AAA
b.Batteries used: Energizer (MR03) Ni-MH 700mAh Rechargable Batteries 1.2 VDC
c.Batteries used: Ansmann (HR03) Ni-MH 1050 nMh Rechargable Batteries 1.2 VDC

WristOx2® Model 3150 with USB Troubleshooting

ProblemPossible CausePossible Solution
Device will not activate. Batteries inserted wrong.Check batteries.
Batteries are depleted.Replace batteries.
Sensor is disconnected.Reconnect sensor.
Device is in Sensor Activation mode and has timed out.Press the activation switch.
Disconnect and then reconnect the sensor.
Device is in Programmed mode.Use nVISION software to select Spot Check or Sensor Activation mode.
%SpO2 and pulse rate do not display.Device set in Partial Display mode.Use nVISION software to select Full Display mode. Reconnect sensor.
Poor pulse signal indicator displays. Excessive patient motion.Reduce patient motion.
Poor pulse signal indicator displays and pulse strength indicator shows two bars or less.Inadequate pulse signal.Reposition or replace sensor, or place sensor on a different finger.
Remove and reconnect sensor.
Hands are cold.Warm sensor application site.
No pulse display on pulse strength bar graph indicator.Sensor applied incorrectly.Refer to sensor Instructions for Use for proper sensor application.
Device needs repair.Contact Nonin Technical Service.
Possible interference from blood flow restrictors (arterial catheters, blood pressure cuffs, infusion lines, etc.).Reduce or eliminate restriction.
Reduced circulation due to excess pressure from sensor.Check sensor alignment, reposition sensor, verify correct sensor size.
Excessive ambient light.Shield sensor from light source. Check sensor alignment.
ProblemPossible CausePossible Solution
No pulse display on pulse strength indicator (continued).Sensor applied to polished or artificial nail.Remove fingernail polish or an artificial nail.
Sensor Light-Emitting Diode (LED) is not lit.Contact Nonin Technical Service.
Er 01 displays on LCD.Device configuration memory failure.Device reverts to default settings

(Spot-Check mode, 4-second sample rate). Use nVISION software to change settings. If error code continues, contact Nonin Technical Service.

Er 02 or 04 displays on LCD.Device memory failure.Contact Nonin Technical Service.
Er 03 or 05 displays on LCD.Device failure. Device memory intact, but device may have lost most recent session or stored data.If error code continues, contact Nonin Technical Service.
Dashes continually display on LCD.Sensor malfunction.Replace sensor with a Nonin-branded sensor.
Device does not record in

Programmed mode.

Data collection start and stop times are set incorrectly.Use nVISION software to program correct start and stop times.
Clock settings are lost after replacing batteries.Use nVISION software to reset clock.
Devices will not pair.Device is out of range.Verify device is in range while being paired (approximately 100 meters [328 feet] spherical radius).
Bluetooth radio has timed out.Press activation switch to turn on Bluetooth radio.

If these solutions do not correct the problem, please contact Nonin Technical Service at (800) 356-8874 (USA and Canada), + 1 (763) 553-9968, or +46 650 401500 (Europe).

Customer Support

For general questions, please contact Nonin Customer Support.

Technical Support

For product technical, troubleshooting or repair questions, please contact Nonin Technical Support.


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