Nonin 3150 User manual

Operator’s Manual
Model 3150
WristOx2
™Pulse Oximeter
Wrist-Worn Pulse Oximeter
with Bluetooth
®
Wireless Technology
English
0123

CAUTION: Federal law (USA) restricts this device to sale by or on the order of a
licensed practitioner.
Nonin®reserves the right to make changes and improvements to this manual and the products it
describes at any time, without notice or obligation.
Nonin Medical, Inc.
13700 1st Avenue North
Plymouth, MN 55441-5443
USA
+ 1 [phone]
800-356-8874 (USA and Canada)
Fax: + 1 [phone]
e-mail: [email protected]
www.nonin.com
0123
EC
REP
MPS, Medical Product Service GmbH
Borngasse 20
D-35619 Braunfels, Germany
References to “Nonin” in this manual imply Nonin Medical, Inc.
Nonin, WristOx2, PureLight, and nVISION are registered trademarks or trademarks of Nonin
Medical, Inc. The Bluetoothword mark and logo are owned by the Bluetooth SIG, Inc. and any use
of such marks by Nonin Medical, Inc. is under license. Other trademarks and trade names are
those of their respective owners.
© 2010 Nonin Medical, Inc.
7622-001-01
Consult Instructions for Use.

i
Contents
Indications for Use.................................................................................................... 1
Contraindications.................................................................................................... 1
Warnings ................................................................................................................1
Cautions .................................................................................................................2
Declaration of Conformity with FCC and Canadian Ministry
of Health Rules for Electromagnetic Compatibility..............................................3
Federal Communications Commission (FCC) Notice............................................. 3
Guide to Symbols...................................................................................................... 4
Displays, Controls, and Indicators.......................................................................... 5
Introduction ............................................................................................................... 8
Unpacking the WristOx2, Model 3150 ....................................................................8
Standard Kit....................................................................................................... 8
Starter Kit .......................................................................................................... 8
Batteries ................................................................................................................ 9
Bluetooth Technology............................................................................................ 9
Operation Modes..................................................................................................... 10
Cable ...................................................................................................................10
Standby .............................................................................................................. 10
On........................................................................................................................ 10
Spot Check Mode ............................................................................................ 10
Sensor Activation Mode................................................................................... 11
Programmed Mode.......................................................................................... 11
Using the WristOx2, Model 3150............................................................................ 12
Installing Batteries............................................................................................... 12
Wrist Straps......................................................................................................... 13
Ring Strap Description..................................................................................... 13
Attach Ring Strap to Device............................................................................. 14
Adjustable Strap Description............................................................................ 15
Attach Adjustable Strap to Device ................................................................... 15
Attaching the Sensor........................................................................................... 18
Patient Application............................................................................................... 19
Two-Piece Wrist Band Application................................................................... 19
Single Strap Application................................................................................... 21
Verifying Operation.............................................................................................. 24
Startup Sequence and Self-Test....................................................................... 24
Activation Switch ................................................................................................. 25
Activate Bluetooth Radio.................................................................................. 25
Activate Device ................................................................................................ 25
Error Codes......................................................................................................... 25
Troubleshooting..................................................................................................... 26
Care and Maintenance............................................................................................ 28
Cleaning the Device ............................................................................................ 28
Cleaning the Sensor............................................................................................ 28
Cleaning the Wrist Band...................................................................................... 28
Storing................................................................................................................. 28

ii
Contents (Continued)
Memory and Data.....................................................................................................29
nVISION Software ....................................................................................................30
nVISION Settings................................................................................................. 30
Accessing nVISION Settings............................................................................ 30
Cable Connection................................................................................................. 31
USB Driver Installation (XP) ............................................................................. 32
USB Driver Installation (Vista).......................................................................... 32
USB Driver Installation (Windows 7)................................................................. 33
Bluetooth Connection........................................................................................... 33
Parts and Accessories ........................................................................................... 35
Service, Support, and Warranty ............................................................................ 36
Service and Support............................................................................................. 36
Warranty............................................................................................................... 36
Technical Information............................................................................................. 37
Manufacturer’s Declaration................................................................................ 37
Equipment Response Time................................................................................ 40
Testing Summary............................................................................................... 41
SpO2Accuracy Testing .................................................................................. 41
Pulse Rate Motion Testing.............................................................................. 41
Low Perfusion Testing.................................................................................... 41
Specifications..................................................................................................... 42
Oximeter Specifications.................................................................................. 42
System Specifications..................................................................................... 43
Transmitter ..................................................................................................... 44

iii
Figures
Figure 1. Front Display (Startup Screen).............................................................. 5
Figure 2. Comparison of Full and Partial Display................................................11
Figure 3. Remove Battery Door.......................................................................... 12
Figure 4. Insert Batteries.................................................................................... 12
Figure 5. Ring Strap........................................................................................... 13
Figure 6. Thread Ring Strap............................................................................... 14
Figure 7. Attach Ring Strap................................................................................ 14
Figure 8. Adjustable Strap.................................................................................. 15
Figure 9. Thread Adjustable Wrist Strap............................................................ 16
Figure 10. Attach Adjustable Wrist Strap ........................................................... 16
Figure 11. Device with Wrist Straps Attached (Front and Back Views).............. 17
Figure 12. Attach Sensor.................................................................................... 18
Figure 13. Verify Two-Piece Wrist Band Attachment ......................................... 19
Figure 14. Thread and Tighten Two-Piece Wrist Band ...................................... 20
Figure 15. Fasten Two-Piece Wrist Band........................................................... 20
Figure 16. Apply Sensor to Patient .................................................................... 21
Figure 17. Verify Single Strap Attachment......................................................... 21
Figure 18. Thread Single Strap ......................................................................... 22
Figure 19. Tighten Single Strap.......................................................................... 22
Figure 20. Fasten Single Strap........................................................................... 23
Figure 21. Apply Sensor to Patient..................................................................... 23
Figure 22. nVISION Settings Window .................................................................31
Tables
Table 1. Labeling Symbols.................................................................................. 4
Table 2. Error Codes......................................................................................... 25
Table 3. Electromagnetic Emissions................................................................. 37
Table 4. Electromagnetic Immunity................................................................... 38
Table 5. Guidance and Manufacturer’s Declaration—
Electromagnetic Immunity ................................................................ 39
Table 6. Recommended Separation Distances................................................. 40

1
Indications for Use
Indications for Use
The Nonin Model 3150, WristOx2™ Pulse Oximeter is a small, wrist-worn device indicated for
use in measuring, displaying, and storing functional oxygen saturation of arterial hemoglobin
(%SpO2) and pulse rate of adult and pediatric patients. It is intended for spot-checking and/or
data collection and recording of patients during both no motion and motion conditions, and for
patients who are well or poorly perfused. The intended use environments are sleep and
pulmonary rehab labs, surgical recovery, critical care, emergency room, long-term care, home
use, and mobile units.
Contraindications
Do not use this device in a Magnetic Resonance (MR) environment or in the presence of flammable anesthetics or
gases.
This device is not defibrillation proof per IEC 60601-1:1988/A2:1995 clause 17h.
Warnings
This device is intended only as an adjunct device in patient assessment. It must be used in conjunction with other
methods of assessing clinical signs and symptoms.
Carefully route patient cables and connections to reduce the possibility of patient entanglement or strangulation.
Use only Nonin-branded PureLight®pulse oximeter sensors. These sensors are manufactured to meet the
accuracy specifications for Nonin pulse oximeters. Using other manufacturers’ sensors can result in improper pulse
oximeter performance.
This device is a precision electronic instrument and must be repaired by qualified technical professionals. Field
repair of this device is not possible. Except to replace batteries, do not attempt to open the case or repair the
electronics. Opening the case may damage the device and void the warranty.
The USB cable must be unplugged from the device before replacing batteries.
This device should not be used adjacent to or stacked with other equipment. If adjacent or stacked use is necessary,
the device should be observed carefully to verify normal operation.
The use of accessories, sensors, and cables other than those listed in this manual may result in increased
electromagnetic emission and/or decreased immunity of this device.
Do not use the device when alarms are required.
Do not use a damaged sensor.
This equipment complies with International IEC 60601-1-2:2007 for electromagnetic compatibility for medical
electrical equipment and/or systems. This standard is designed to provide reasonable protection against harmful
interference in a typical medical installation. However, because of the proliferation of radio-frequency transmitting
equipment and other sources of electrical noise in healthcare and other environments, it is possible that high levels
of such interference due to close proximity or strength of a source might disrupt the performance of this device.
Medical electrical equipment needs special precautions regarding EMC, and all equipment must be installed and
put into service according to the EMC information specified in this manual.
Only use Nonin-branded sensors with a length of 1 meter or less. Accuracy may degrade if sensor cable is over 1
meter in length. Using the sensor cable adapter does not affect accuracy.

2
Indications for Use
Cautions
If this device fails to respond as described, refer to “Troubleshooting” or discontinue use until the situation has been
corrected. Contact Nonin Technical Service.
This device has motion tolerant software that minimizes the likelihood of motion artifact being misinterpreted as
good pulse quality. In some circumstances, however, the device may still interpret motion as good pulse quality.
Check the pulse oximeter sensor application site every 6-8 hours to determine the positioning of the sensor and the
circulation and skin sensitivity of the patient. Patient sensitivity varies depending on medical status or skin condition.
Do not place liquids on top of this device.
Do not place the WristOx2, Model 3150, in liquid or clean it with agents containing ammonium chloride or isopropyl
alcohol. Refer to the “Care and Maintenance” section of this operator’s manual.
Use a detergent that is safe for skin and washable surfaces. Most detergents can be high sudsing, so use sparingly.
Wipe with a damp, detergent free cloth to remove residue.
Follow local, state, and national governing ordinances and recycling instructions regarding disposal or recycling of
the device and device components, including batteries.
In compliance with the European Directive on Waste Electrical and Electronic Equipment (WEEE) 2002/96/EC, do
not dispose of this product as unsorted municipal waste. This device contains WEEE materials; please contact your
distributor regarding take-back or recycling of the device. If you are unsure how to reach your distributor, please call
Nonin for your distributor’s contact information.
This device is designed to determine the percentage of arterial oxygen saturation of functional hemoglobin. Factors
that may degrade pulse oximeter performance or affect the accuracy of the measurement include the following:
• excessive ambient light
• excessive motion
• electrosurgical interference
• blood flow restrictors (arterial catheters, 
blood pressure cuffs, infusion lines, etc.)
• moisture in the sensor
• improperly applied sensor
• incorrect sensor type
Do not perform any testing or maintenance on this device while it is being used to monitor a patient.
Verify all visible indicators appear during the start-up (initialization) sequence. If any indicator does not appear, do
not use the device. Contact Nonin Technical Service for assistance.
Portable and mobile RF communications equipment can affect medical electrical equipment.
Batteries may leak or explode if used or disposed of improperly. Remove batteries if the device will be stored for
more than 30 days. Do not use different types of batteries at the same time. Do not mix fully charged and partially
charged batteries at the same time. These actions may cause the batteries to leak.
To avoid the risk of confusing or misinterpreting patient data when transmitting data via Bluetooth, verify the device
is paired with the correct display unit.
The pulse oximeter may not work when circulation is reduced. Warm or rub the finger or reposition the sensor.
A functional tester cannot be used to assess the accuracy of the oximeter or sensor.
Do not fasten the device too tightly around the patient’s wrist. Inaccurate readings and patient discomfort could
result.
• poor pulse quality
• venous pulsations
• anemia or low hemoglobin concentrations
• cardiogreen and other intravascular dyes
• carboxyhemoglobin
• methemoglobin
• dysfunctional hemoglobin
• artificial nails or fingernail polish

3
Indications for Use
Declaration of Conformity with FCC and Canadian Ministry of
Health Rules for Electromagnetic Compatibility
• Nonin Medical, Inc., of 13700 1st Avenue North, Plymouth, Minnesota, 55441, declares
under its sole responsibility that Model 3150, WristOx2Pulse Oximeter, to which this
declaration relates, complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this devicemay not cause harmful interference, and (2) this
device must accept any interference received, including interference that may cause
undesired operation.
• Ministry of Health (Canada), Safety Code 6: standards include a substantial safety
margin designed to ensure the safety of all persons, regardless of age and health. The
exposure standard for wireless mobile phones employs a unit of measurement known
as the Specific Absorption Rate, or SAR. The SAR limit set by the FCC is 1.6 W/kg.
Federal Communications Commission (FCC) Notice
This device has been tested and found to comply with the limits for a class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This device generates,
uses, and can radiate radio frequency energy. If not installed and used in accordance with
the instructions, it may cause harmful interference to radio or television reception, which
canbe determinedbyturningthe deviceoffandon.The useris encouragedto trytocorrect
the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the distance between the device and the receiver.
• Connect the device to an outlet on a circuit different from the outlet where the receiver
is connected
• Consult the dealer or an experienced radio/TV technician for assistance.
• RF Exposure: For body worn operation, to maintain compliance with FCC RF exposure
guidelines, use only accessories that contain no metallic components. Use of other
accessories may violate FCC RF exposure guidelines and should be avoided.
• The WristOx2, Model 3150, is designed and manufactured not to exceed the emission
limits for exposure to radio frequency (RF) energy set by the United States FCC. These
limits are part of comprehensive guidelines and establish permitted levels of RF energy
for the general population. The guidelines are based on the safety standards previously
set by both U.S. and international standards bodies. This device has been shown to be
compliant for localized specific absorption rate (SAR) for uncontrolled environment/
general population exposure limits specified in ANSI/IEEE Std. C95.1-2005.
• The FCC requires the user to be notified that any changes or modifications to this device
that are not expressly approved by Nonin Medical, Inc. may void the user’s authority to
operate the device.

4
Guide to Symbols
Guide to Symbols
This chapter describes the symbols that are found in this manual and on the WristOx2,
Model 3150. Detailed information about display symbols can be found in “Displays,
Controls, and Indicators.”
Symbol Description
!
EC
REP
0123
®
Table 1: Labeling Symbols
Caution!
Consult Instructions for Use.
Authorized Representative in the European Community.
CE Marking indicating conformance to EC directive No. 93/42/EEC
concerning medical devices.
Type BF-Applied Part (patient isolation from electrical shock)
No alarms
Indicates separate collection for electrical and electronic equipment (WEEE).
Continua Certified™ signifies that this product has beentested and proven to
be interoperable with other products that carry the Continua Certified symbol.
Bluetooth®figure mark
Non-ionizing electromagnetic radiation. Equipment includes RF transmitters.
Interference may occur in the vicinity of equipment marked with this symbol.
UL Mark for Canada and the United States with respect toelectric shock, fire,
and mechanical hazards only in accordance with UL 60601-1 and 
CAN/CSA C22.2 No. 601.1.
IP33 Protected against spraying water and against access to hazardous parts with
a tool, per IEC 60529.

Activation Switch Sensor Port
5
Displays, Controls, and Indicators
Displays, Controls, and Indicators
Figure 1: Front Display (Startup Screen)
%SpO2Display
This 3-digit display, located in the upper left corner of the LCD, 
shows percent blood oxygen saturation (%SpO2). The range is 
from 0 to 100 %.
This display also shows the month, year, and hour (24-hour clock
format) during startup.
Pulse Rate Display
This 3-digit display, located below the %SpO2display, shows the
pulse rate in beats per minute (BPM). The range is from 18 to 321
BPM.
This display also shows the day and minute during startup.

Full
Half
Critical
Low
6
Displays, Controls, and Indicators
Activation Switch
This switch is located next to the sensor port.
Pressing this switch activates the Bluetooth radio for 3 minutes.
It can also be used to turn the device on when it is in Standby mode.
See “Activation Switch” section for more information.
Sensor Fault Indicator
This indicator displays if the device determines a sensor fault exists
(e.g., sensor disconnect, misalignment, or incompatibility with the
device). It also displays when the finger is removed from the sensor.
Pulse Strength Indicator
This heart-shaped indicator is followed by up to nine curved bars. The
heart shape is always visible, and the number of curved bars on the
display depends on the pulse strength as determined by the oximeter.
Poor Pulse Signal Indicator
This indicator displays when the pulse signal is inadequate or the
device does not sense a pulse. It may also display if there is
excessive motion at the sensor site.
Battery Indicator
This indicator shows remaining battery life as either full, half, low, and
critical (as shown at left).
Replace the batteries when device reaches low state.
When the battery reaches critical state, all indicators clear from the
display except for the blinking critical battery indicator, the current
session closes, and the Bluetooth radio shuts down.

Bluetooth
indicator
Bluetooth indicator
with animated bars
7
Displays, Controls, and Indicators
Bluetooth Indicator
This indicator displays when the Bluetooth radio is on. It appears as
either the Bluetooth logo or the Bluetooth logo with animated bars.
This indicator displays for the first 2 minutes the device is on. If a
master device does not connect to the device in those 2 minutes, the
Bluetooth radio shuts down and the icon no longer displays.
When the device is connected to a master device, the indicator
displays with animated bars.
If the Bluetooth radio is on when the device enters Standby mode or
connects to the USB interface cable, the Bluetooth indicator appears
on the LCD while the Bluetooth radio shuts down. It will be the only
indicator on the LCD and will display for up to 10 seconds.
SmartPoint Indicator
This indicator displays during the startup sequence.

8
Introduction
Introduction
The Bluetooth-enabled WristOx2, Model 3150, is a small, wrist-worn device that displays,
measures, and stores patient SpO2 and pulse rate data. The device includes a Bluetooth 
radio with a range (spherical radius) of approximately 100 meters (328 feet).
The device ships ready to use in Spot Check turn on mode. In Spot Check turn on mode,
inserting a finger in the sensor automatically turns the device on. Approximately 10
seconds after the finger is removed, the device enters Standby mode.
Advanced memory and programming features are available with Nonin’s nVISION®
software (version 6.3 or greater). See the “nVISION Software” section to learn more about
using the device with nVISION.
Unpacking the WristOx2, Model 3150
TheWristOx2, Model 3150,standardor starterkit includes the itemslistedbelow. Oncethe
shipping carton is unpacked, verify these items were received. Contact the carrier
immediately if the shipping carton is damaged.
Standard Kit
• Model 3150, WristOx2 Pulse Oximeter
• Model 8000SM-WO2, reusable soft sensor
• 3 two-piece wrist bands, 1 each of the following:
• 6 in. (15 cm)
• 8 in. (20 cm)
• 10 in. (25 cm)
• 2 AAA (1.5 volt) alkaline batteries
• Operator’s manual (CD)
• USB driver software (on operator’s manual CD) – required to use the PC USB interface cable
Starter Kit
A starter kit is required to configure the device and download data to a PC. The starter kit
consists of the standard kit, plus:
• 9 pack of two-piece wrist bands, 3 each of the following:
• 6 in. (15 cm)
• 8 in. (20 cm)
• 10 in. (25 cm)
• nVISION SpO2data management software (CD)
• PC USB interface cable

9
Introduction
Batteries
The device uses 2 AAA alkaline batteries.
With new alkaline batteries, battery life is approximately 48 hours (minimum) when not
connected to a Bluetooth device. When connected to a Bluetooth device, battery life will
vary depending on class of operation. See “Specifications” for detailed battery life
information.
The battery indicator shows one of four states: full, half, low, and critical. Replace the
batteries when device reaches low state. A low battery has a minimum of 10 minutes
before it reaches criticalstate. Actual batterylife depends on Bluetooth radio use.In critical
battery mode, the battery indicator blinks and the device no longer monitors or records
patient data.
When batteries are removed, thedevice maintains the time and date for upto 30 seconds.
If replacing batteries takes more than 30 seconds, or if the battery level is at or below the
critical level, clock settings are lost and the device reverts to Spot Check mode. Use
nVISION software to reset the clock and change the operation mode.
Remove the batteries and disconnect the sensor if the device is to be stored for more than
1 month. In storage, battery life is approximately 9 months.
Bluetooth Technology
Bluetooth technology allows wireless connections between electronic communications
and computing devices.The technology is basedon a radio link thatoffers fast and reliable
data transmissions. Bluetooth uses a license-free, globally available frequency range in
the ISM band—intended to ensure communication compatibility worldwide.
Nonin’s use of Bluetooth wireless technology allows SpO2and pulse rate data to be
transmitted through a Bluetooth radio to a compatible Bluetooth-enabled device. Nonin’s
wireless system removes the cable connection from the device, giving patients increased
ability to move freely.
To make efficient use of battery life, Nonin’s WristOx2, Model 3150, uses an automatically
switchable Class 1/Class 2 Bluetooth radio with a maximum range (spherical radius) of
about 100 meters (328 feet). Obstacles and other conditions may affect range, and class
of operation and connection mode will impact battery life. See “Specifications” for detailed
battery life information.
NOTES:
• This device contains non-volatile memory. Removing or replacing batteries does not
affect the data stored in memory. Stored data remains in memory until overwritten by
newer data or cleared from memory with nVISION software (version 6.3 or greater).
• If batteries are replaced while recordingdata, the session will terminate and some data
from the session may not be saved. The terminated session will be time stamped with
the current date/time the next time the device turns on.
• If clock settings are lost, the date and time restarts at 01:01:10:00:00.

10
Operation Modes
Operation Modes
The WristOx2, Model 3150, has three states: Cable, Standby, and On.
Cable
The device is in Cable mode when it is connected to a PC using the USB interface cable.
While in Cable mode, the device does not collect or save data and the Bluetooth radio is
off.
Standby
When the device is in Standby mode, the screen is blank and the device appears to be off.
In Standby, it is ready for a signal that will turn the device on (e.g., pressing activation
switch,insertingfingerinsensor [SpotCheckmode],connectingsensor[SensorActivation
mode], or programmed start time [Programmed mode]). While in Standby mode, the
device does not collect or save data and the Bluetooth radio is off.
On
When the device is on, it can collect and save data. The device features three turn on
modes:
• Spot Check mode
• Sensor Activation mode
• Programmed mode
The device is delivered in Spot Check mode. nVISION software (version 6.3 or higher) is
needed to access the device settings and change Spot Check mode to Sensor Activation
or Programmed mode (see “nVISION Software”).
The device recalls the active settings when the device is shut off and turned on again.
Spot Check Mode
Spot Check mode is the default turn on operation mode.
The device automatically turns on when a finger is inserted into the sensor. It enters
Standby mode 10 seconds after the finger is removed. If the sensor is disconnected, the
device enters Standby mode immediately.
In this mode, the sensor can be left connected to the device.
NOTE: If the device determines that a sensor fault exists (a sensor failure, misalignment,
or incompatibility with the device) or if a pulse oximeter sensor signal cannot be
detected, the device enters Standby mode after 3 minutes.

11
Operation Modes
Sensor Activation Mode
Sensor Activation mode may be selected through nVISION software. In this mode, the
device turns on when the activation switch is pressed or when the sensor is disconnected
and reconnected. This mode isuseful when using a sensor that is not easily removed from
the sensor site (e.g., disposable or wrap sensor).
If the sensor is not used forat least 10 minutes or if an inadequate pulsesignal is detected,
the device automatically enters Standby mode. To turn the device on again, press the
activation switch or disconnect and reconnect the sensor.
This mode allows for Full or Partial display (see figure 2 for display comparison). When
using Partial display, the SpO2and pulse rate readings do not display. The user will only
see the battery indicator and the animated pulse strength indicator.
Full Display Partial Display
Figure 2: Comparison of Full and Partial Display
Programmed Mode
Programmed mode may be selected and setup through nVISION software. With the
software, the user can program the device to start and stop for up to three sessions. Once
programmed, the next start time displays on the LCD every 30 seconds in HH:MM format.
A sensor must be connected for Programmed mode to function.
Iftheprogrammed deviceisinStandbymode and the activationswitchis pressed, the user
activatesthe Bluetoothradioand the device for3minutes.During this time, theuserisable
to take and store measurements. After 3 minutes, the device returns to Standby mode.
This mode allows for Full or Partial display (see figure 2 above for display comparison).
When using Partial display, the SpO2and pulse rate readings do not display. The user will
only see the battery indicator and the animated pulse strength indicator.
NOTE: The sensor does not need to be applied to a finger to turn the device on.
NOTE: A programmed device reverts to Spot Check mode if the clock is not set or if the
clock settings are lost when replacing the batteries.

12
Using the WristOx2, Model 3150
Using the WristOx2, Model 3150
Installing Batteries
1. Open the battery compartment by sliding the battery door off the back of the 
device (figure 3).
Figure 3: Remove Battery Door
2. Insert 2 new AAA alkaline batteries (figure 4). Battery orientation is shown 
inside the battery compartment.
Figure 4: Insert Batteries
3. Replace battery door by sliding it back into place.
4. Inserting batteries does not turn the device on. In Spot Check mode, the device 
turns on when a finger is inserted in the sensor.
WARNING: Do not use the device when alarms are required.
WARNING: The USB cable must be unplugged from the device before replacing
batteries.
NOTE: When batteries are removed, the device maintains the time and date for up to 
30 seconds. If replacing batteries takes more than 30 seconds, or if the battery level is 
at or below the critical level, the operation mode reverts to Spot Check mode. Use
nVISION software to reset the clock and change the operation mode.

13
Using the WristOx2, Model 3150
Wrist Straps
The WristOx2, Model 3150, is designed to be applied to the patient’s wrist using a two-
piece wrist band. The two-piece wrist band consists of a ring strap and an adjustable strap.
For pediatrics and petite adults, the device may be applied using asingle adjustable strap.
The single adjustable strap is the longer of the two straps in the two-piece wrist band
package.
Straps have hook and loop fasteners on one side. The other side has a smooth, woven
fabric. When the straps are attached to the device, the woven side should touch the
patient’s skin.
This section contains descriptions of the straps and instructions for attaching the straps to
thedevice.See the “PatientApplication”sectionfor instructions on howtoapplythedevice
to the patient.
Ring Strap Description
One end of the ring strap has a plastic ring. The square end has a hook and loop fastener
(figure 5).
The square end attaches to the strap bar at the top of the device, by the sensor port
(see “Attach Ring Strap to Device”).
Attach this end to strap
bar by sensor port
Fastener
Hook and Loop Side
Woven Side
Figure 5: Ring Strap
NOTE: A wrist strap has a maximum of 10 uses before replacement is required.

14
Using the WristOx2, Model 3150
Attach Ring Strap to Device
1. Place device face down.
2. Locate strap bar at top of device (by sensor port).
3. Position ring strap so hook and loop side of strap faces up.
4. Thread square end fastener through the strap bar by the sensor port. Start from
the back of the device and thread it towards the front of the device (figure 6).
.
Strap bar at 
top of device 
(by sensor port)
Figure 6: Thread Ring Strap
5. Fold strap so fastener adheres to the strap (figure 7).
Figure 7: Attach Ring Strap
6. Continue to “Attach Adjustable Strap to Device.”

15
Using the WristOx2, Model 3150
Adjustable Strap Description
This strap is part of the two-piece wrist band and may also be used to apply the device
using a single strap.
The adjustable strap is available in various lengths (see “Parts and Accessories”). It has
hook and loop fasteners at both ends (figure 8).
The square end attaches to the strap bar at the bottom of the device, by the battery door
(see “Attach Adjustable Strap to Device” section).
Hook and Loop Side
Woven Side
Attach square end
to strap bar by
battery door
Rounded End Fastener
Square End
Fastener
Figure 8: Adjustable Strap
Attach Adjustable Strap to Device
1. Place device face down.
2. Locate strap bar at bottom of device (by battery door).
3. Position adjustable strap so hook and loop side of strap faces up.