MSA ALTAIR 4XR User manual

MSAsafety.com
Operating Manual
ALTAIR®4XR
Multigas Detector
Order No.: 10175896/00

1000 Cranberry Woods Drive
Cranberry Township, PA 16066
USA
Phone 1-800-MSA-2222
Fax [phone]
For your local MSA contacts please go to our website www.MSAsafety.com
© MSA 2016. All rights reserved
WARNING!
Read this manual carefully before using the device. The device will perform as designed only if it is
used and maintained in accordance with the manufacturer's instruction. Otherwise, it could fail to
perform as designed and persons who rely on this device for their safety could sustain serious personal
injury or death.
This product incorporates Bluetooth®wireless technology.
The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc., and any
use of such marks by MSA is under license. Other trademarks and trade names are those of their
respective owners.

ALTAIR®4XR 3
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Contents
1 Safety Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Correct Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Liability Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Safety and Precautionary Measures to be Adopted . . . . . . . . . . . . . . 6
1.4 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Device Hardware Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.3 On-Screen Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.4 Battery Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.5 Viewing Additional Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.6 Sensor Missing Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.7 Sensor End of Life Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.8 Sensor End of Life Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.9 Monitoring Toxic Gases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.10 Monitoring Oxygen Concentration . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.11 Monitoring Combustible Gases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 Environmental Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2 Turning ON and Fresh Air Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fresh Air Setup (FAS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3 Measurement Mode [Normal Operation]. . . . . . . . . . . . . . . . . . . . . . 27
3.4 Device Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Sensor Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Calibration Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Alarm Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Setup Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Enable Bluetooth Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.5 Bluetooth Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.6 Data Logging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.7 Function Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.8 Bump Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.9 Bump LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.10 Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

ALTAIR®4XR 4
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Fresh Air Setup and Zero Calibration . . . . . . . . . . . . . . . . . . . . . . . . 35
Attach the Calibration Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Span Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.11 Time of Day Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.2 Live Maintenance Procedure - Replacing and Adding a Sensor . . . 42
4.3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.4 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.5 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.1 Factory-set Alarm Thresholds and Setpoints . . . . . . . . . . . . . . . . . . 45
5.2 Performance Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.3 XCell Sensor Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.1 Start Up Sequence (Power on) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2 Fresh Air Setup (FAS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.3 Reset Screen Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7.4 Bump Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.5 Options Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.6 Sensor Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.7 Calibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.8 Alarm Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.9 Time and Date Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.10 Bluetooth Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

ALTAIR®4XR 5
Safety Regulations
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1 Safety Regulations
1.1 Correct Use
The ALTAIR 4XR Multigas Detector is for use by trained and qualified personnel. It is designed to be
used when performing a hazard assessment to:
• Assess potential worker exposure to combustible and toxic gases and vapors as well as low level
of oxygen.
• Determine the appropriate gas and vapor monitoring needed for a workplace.
The ALTAIR 4XR Multigas Detector can be equipped to detect:
• Combustible gases and certain combustible vapors
• Oxygen-deficient or oxygen-rich atmospheres
• Oxygen for monitoring inertization applications. The device is suitable and certified for the
measurement of the oxygen concentration in gas mixtures for inertization according to EN 50104
but without alarm function.
• Specific toxic gases for which a sensor is installed.
NOTE: While the device can detect up to 30% oxygen in ambient air, it is approved for use only up to
21% oxygen.
The ATEX directive is only valid until 25% Vol O2.
It is imperative that this operating manual be read and observed when using the device. In particular,
the safety instructions, as well as the information for the use and operation of the device, must be care-
fully read and observed. Furthermore, the national regulations applicable in the user's country must be
taken into account for a safe use.
WARNING!
This product is supporting life and health. Inappropriate use, maintenance or servicing may affect the
function of the device and thereby seriously compromise the user's life.
Before use the product operability must be verified. The product must not be used if the function test
is unsuccessful, it is damaged, a competent servicing/maintenance has not been made, genuine MSA
spare parts have not been used.
Alternative use, or use outside this specification will be considered as non-compliance. This also
applies especially to unauthorized alterations to the product and to commissioning work that has not
been carried out by MSA or authorized persons.
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful inter-
ference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference
in which case the user will be required to correct the interference at his own expense.

ALTAIR®4XR 6
Safety Regulations
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WARNING!
This is a class A product in accordance with CISPR 22. In a domestic environment, this product may
cause radio interference, in which case the user may be required to take adequate measures.
This Class A digital apparatus complies with Canadian ICES-003.
1.2 Liability Information
MSA accepts no liability in cases where the product has been used inappropriately or not as intended.
The selection and use of this product must be under the direction of a qualified safety professional who
has carefully evaluated the specific hazards of the jobsite where it will be used and who is completely
familiar with the product and its limitations. The selection and use of this product and its incorporation
into the safety scheme of the jobsite is the exclusive responsibility of the employer.
Changes and modifications not expressly approved by the manufacturer will void the user’s authority
to operate the equipment.
1.3 Safety and Precautionary Measures to be Adopted
WARNING!
Carefully review the following safety limitations and precautions before placing this device in service.
Do not alter or modify the device.
Failure to do so can result in serious personal injury or death.
WARNING!
All device readings and information must be interpreted by someone trained and qualified in inter-
preting device readings in relation to the specific environment, industrial practice and exposure limita-
tions.
Check Function
Before each day’s use, check the function of the device (chapter 3.7 "Function Tests").
MSA recommends carrying out a routine inspection prior to each day’s use.
Bluetooth Operation
Bluetooth Operation is dependent upon signal availability of the wireless service(s) necessary to main-
tain the communication link. Loss of wireless signal will prevent communication of alarms and other
information to linked devices. Take appropriate precautions in the event a loss of wireless signal
occurs.
Perform a Bump Test
Bump test frequency is often stipulated by national or corporate regulations; however, bump testing
before each day's use is generally the accepted best safety practice and is therefore MSA’s recom-
mendation. The device must pass the bump test. If it fails the test, perform a calibration before using
the device.
Perform a bump test (see chapter 3.8 "Bump Test") more frequently if the device is subjected to phys-
ical shock or high levels of contaminants. Also, perform a bump test more frequently if the tested atmo-

ALTAIR®4XR 7
Safety Regulations
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sphere contains the following materials, which may desensitize the combustible gas sensor and reduce
its readings:
• Organic silicones
• Silicates
• Lead-containing compounds
• Hydrogen sulphide exposures over 200 ppm or exposures over 50 ppm for one minute.
Check minimum concentration of a combustible gas
The minimum concentration of a combustible gas in air that can ignite is defined as the Lower Explo-
sive Limit (LEL). A combustible gas reading of "XXX” indicates the atmosphere is above 100 % LEL or
5.00 % vol CH4, and an explosion hazard exists. Move away from hazardous area immediately.
Observe atmosphere
Do not use the device to test for combustible or toxic gases in the following atmospheres as this may
result in erroneous readings:
• Oxygen-deficient or oxygen-rich atmospheres
• Reducing atmospheres
• Furnace stacks
• Inert environments
• Atmospheres containing combustible airborne mists/dusts.
Use the device only to detect gases/vapors for which a sensor is installed.
The device is suitable and certified for the measurement of the oxygen concentration in gas mixtures
for inertization according to EN 50104 but without alarm function.
Make sure >10% oxygen is present for accurate combustible readings with the catalytic sensor.
Not to be used for gases having a flash point in excess of 38 °C (100 °F)
Do not use the device to test for combustible gases in atmospheres containing vapors from liquids with
a high flash point (above 38 °C, 100 °F), as this may result in erroneously low readings.
Physical shock
Recheck calibration if device is subjected to physical shock.
Sensor maintenance
Do not block sensor openings as this may cause inaccurate readings. Do not press on the face of the
sensors, as this may damage them and cause erroneous readings. Do not use compressed air to clean
the sensor holes, as the pressure may damage the sensors.
Observe Proper Time for Display Stabilizing
Allow sufficient time for device to display accurate reading. Response times vary based on the type of
sensor being utilized.
Observe proper battery maintenance
Use only battery chargers made available by MSA for use with this device; other chargers may damage
the battery pack and the device. Dispose of in accordance with local health and safety regulations.
Use of the MSA GALAXY®GX2 Automated Test System is an alternate approved method for charging
ALTAIR 4XR devices.
As the battery pack ages, there will be a reduction in usable device runtime.
Risk of explosion: Do not recharge device in hazardous area.

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Safety Regulations
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Be Aware of Environmental Conditions
A number of environmental factors may affect the sensor readings, including changes in pressure,
humidity and temperature. Pressure and humidity changes also affect the amount of oxygen actually
present in the atmosphere.
Be Aware of the Procedures for Handling Electrostatically Sensitive Electronics
The device contains electrostatically sensitive components. Do not open or repair the device without
using appropriate electrostatic discharge (ESD) protection. The warranty does not cover damage
caused by electrostatic discharges.
Be Aware of the Product Regulations
Follow all relevant national regulations applicable in the country of use.
Be Aware of the Warranty Regulations
The warranties made by MSA The Safety Company with respect to the product are voided if the
product is not used and maintained in accordance with the instructions in this manual. Please protect
yourself and others by following them. We encourage our customers to write or call regarding this
equipment prior to use or for any additional information relative to use or service.
Special Conditions for Safe Usage
• In the event of combustible sensor overrange, the device will enter a Lock Alarm state, which must
be reset in a fresh air environment. To reset this alarm, cycle power off and on, in fresh air. Keep
the device in the fresh air environment until LEL or CH4 readings have stabilized and then follow
the Fresh Air Setup and Zero Calibration instructions contained in this manual.
• The RF radiation power used to activate the RFID tag antenna shall not exceed 6 Watts for EPL
Group I applications or 2 Watts for EPL Group IIC applications.

ALTAIR®4XR 9
Safety Regulations
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1.4 Warranty
Specific battery run-time over temperature is not warranted.
This warranty does not cover filters, fuses, etc. As the battery pack ages, there will be a reduction in
usable device run time. Certain other accessories not specifically listed here may have different
warranty periods. This warranty is valid only if the product is maintained and used in accordance with
Seller's instructions and/or recommendations.
The Seller shall be released from all obligations under this warranty in the event repairs or modifica-
tions are made by persons other than its own or authorized service personnel or if the warranty claim
results from physical abuse or misuse of the product. No agent, employee or representative of the
Seller has any authority to bind the Seller to any affirmation, representation or warranty concerning this
product. Seller makes no warranty concerning components or accessories not manufactured by the
Seller, but will pass on to the Purchaser all warranties of manufacturers of such components.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED OR STATU-
TORY, AND IS STRICTLY LIMITED TO THE TERMS HEREOF. SELLER SPECIFICALLY
DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR
PURPOSE.
Exclusive Remedy
It is expressly agreed that Purchaser's sole and exclusive remedy for breach of the above warranty, for
any tortuous conduct of Seller, or for any other cause of action, shall be the replacement at Seller's
option, of any equipment or parts thereof, which after examination by Seller is proven to be defective.
Replacement equipment and/or parts will be provided at no cost to Purchaser, F.O.B. Seller's Plant.
Failure of Seller to successfully replace any nonconforming equipment or parts shall not cause the
remedy established hereby to fail of its essential purpose.
Exclusion of Consequential Damage
Purchaser specifically understands and agrees that under no circumstances will seller be liable to
purchaser for economic, special, incidental or consequential damages or losses of any kind whatso-
ever, including but not limited to, loss of anticipated profits and any other loss caused by reason of non-
operation of the goods. This exclusion is applicable to claims for breach of warranty, tortuous conduct
or any other cause of action against seller.
ITEM WARRANTY PERIOD
Chassis and electronics Four years
All sensors unless otherwise specified Four years
XCell EX-H Sensor One year

ALTAIR®4XR 10
Description
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2 Description
2.1 Overview
Fig. 1 Device overview
The device monitors gases in ambient air and in the workplace.
It is available with a maximum of three sensors, which can display readings for four separate gases
(one Two-Tox Sensor can detect two toxic gases with a single sensor).
While the device can detect up to 30% oxygen in ambient air, it is approved for use only up to 21%
oxygen.
The alarm levels for the individual gases are factory-set and can be changed through the Setup Menu.
These changes can also be made through the GALAXY GX2 Test Stand or MSA Link software. Ensure
that the latest version of the GALAXY GX2 firmware or MSA Link software has been downloaded from
MSA’s website www.msasafety.com.
1 Datalink Communication port 8 Display
2 Bump LED (green/red) and
Fault LED (yellow)
9 Alarm LEDs (4)
3 Sensor Inlets 10 Belt Clip
4 Horn 11 Charging Connection
5  Button 12 Screws (4)
6  Button 13 Charge LED (red/green/orange)
7 q Button 14 Bluetooth Status LED
9
9
12
9
3
4
5
6
7
8
3
14
13
10
11
12
If gas is present during Fresh Air Setup, the device will fail and enters Normal Operation
mode.

ALTAIR®4XR 11
Description
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2.2 Device Hardware Interfaces
Device operation is dialog driven from the display with the aid of the three function buttons (2.2
"Device Hardware Interfaces").
The device has three buttons for user operation. Each button can function as a "soft key", as defined
on the display directly above the button.
Button Definitions
LED Definitions
Vibrating Alarm
The device is equipped with a vibrating alarm.
Button Description
q
The qbutton is used to turn device on or off and to confirm user action selections.
When the button and the q button are pressed simultaneously for device start-
up, the Options Setup Mode displays.

The button is used to move forward through data screens in measuring mode, or
as page back and to decrease the values in set-up mode. Holding this button for
3 seconds while in Normal Operation mode activates the InstantAlert alarm.

The button is used to reset peak, STEL TWA and acknowledge alarms (where
possible) or access calibration in measuring mode. It is also used as page up or to
increase the values in set-up mode.
LED Description
GREEN/RED
(Bump LED)
After a successful Bump Test, the green LED will flash every 15 seconds for a
24-hour period.
When the device fails a bump test or when the 24-hour period expires, the red
LED flashes every 15 seconds.
This option can be turned off through the MSA GALAXY GX2 Test Stand or
MSA Link software.
RED
(Alarm LED)
The red alarm LEDs are visual indications of an alarm condition or any type of
error in the device.
YELLOW
(Fault LED)
The yellow fault LED is a visual indication of an device fault condition. This
LED turns on with the following conditions:
• Device memory error
• Sensor Missing
• Sensor Error
RED/GREEN/
ORANGE
(Charge LED)
The charge LED is a visual indication of charge status.
• RED: device is charging
• GREEN: charge is complete
• ORANGE: problem detected during charging
BLUE
(Bluetooth
Status)
The blue LED is a visual indication of the Bluetooth connection status.
• Off = Bluetooth OFF or Undiscoverable
• Fast Flash = Discoverable Mode
• Slow Flash = Connected

ALTAIR®4XR 12
Description
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Backlight
The backlight automatically activates when any front panel button is pressed. The backlight remains
on for the duration of the user-selected timeout. This duration can be set through MSA GALAXY GX2
Test Stand or MSA Link software.
Horn
The horn provides an audible alarm.
Operating Beep
This operating beep activates every 30 seconds by momentarily beeping the horn and flashing the
alarm LEDs under the following conditions:
• Operating beep is enabled
• Device is in Normal Operation mode
• Device is not in battery warning
• Device is not in gas alarm
• Audible and visual options are enabled
2.3 On-Screen Indicators
Fig. 2 Display
1 Graphic Symbols 3 Gas Concentration
2 Gas Type
Alarm Symbol – Indicates alarm state
Motion Alert – Indicates Motion Alert is active
Bump Check Symbol – Indicates successful bump or cal
Indicates required interaction
Battery Condition – Indicates the battery charge level
1
2
3

ALTAIR®4XR 13
Description
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2.4 Battery Care
Battery Life Indicator
The battery condition icon is continuously displayed in the upper right-hand corner of the display. As
the battery is depleted, battery icon segments blank until only the battery icon outline remains.
Each indicator segment represents approximately 25 % of the total battery capacity.
Battery Warning
WARNING!
If battery warning alarm activates while using the device, leave the area immediately as the end of
battery life is approaching. Failure to follow this warning can result in serious personal injury or death.
The nominal run-time of the device at room temperature is 24 hours. The runtime with an active Blue-
tooth connection is approximately 22 hours. The runtime of the device at -20 °C/- 4 °F will be approx-
imately 14 hours.
Actual run-time will vary depending on ambient temperature and alarm conditions.
The alarm levels for the individual gases are factory-set and can be changed through the Setup Menu.
Sensor Labels
Calibration Setup
Cal Gas Cylinder – Indicates cal gas must be applied
No Gas Cylinder – Indicates cal gas should not be applied and device must be exposed
to fresh air.
Hourglass – Indicates user should wait
Minimum – Indicates a minimum value or low alarm
PEAK Symbol – Indicates a PEAK reading or high alarm
STEL Symbol – Indicates a STEL alarm
TWA Symbol – Indicates a TWA alarm
Sensor life Symbol – Indicates the end of sensor life
Bluetooth Symbol - Indicates enabled Bluetooth operation
COMB/EX
O2
H2S
CO
NO2
SO2

ALTAIR®4XR 14
Description
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A Low Battery Warning indicates that a nominal 30 minutes of operation remain before the battery’s
charge is depleted.
When the device goes into Low Battery Warning, the:
• battery life indicator flashes
• alarm sounds
• alarm LEDs flash
• display shows "LOW BATT" and
• device repeats this warning every 60 seconds and continues to operate until it is turned off or
battery shutdown occurs.
Battery Shut Down
WARNING!
If the battery shutdown alarm activates, stop using the device as it no longer has enough power to indi-
cate potential hazards, and persons relying on this device for their safety could sustain serious
personal injury or death.
The device goes into battery shutdown mode 60 seconds before final shutdown (when the batteries
can no longer operate the device):
• On the display flashes "BATT ALARM" and
• Alarm sounds and lights flash; alarm cannot be silenced,
• No other pages can be viewed; after approximately one minute, the device automatically turns off.
When battery shutdown condition occurs:
(1) Leave the area immediately.
(2) Recharge the battery.
The duration of remaining device operation during a Low Battery Warning depends on
ambient temperatures.

ALTAIR®4XR 15
Description
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Battery Charging
WARNING!
Risk of explosion: Do not recharge device in hazardous area.
WARNING!
Use of any charger, other than the charger supplied with the device, may damage or improperly charge
the batteries.
The charger is capable of charging a completely depleted pack in less than four hours in normal, room-
temperature environments.
To Charge the Device
• Ensure the charger connector is firmly seated in the charge port on the back of the device.
• The battery symbol will scroll through a progressively increasing number of segments and the
charge LED will be red until 90 % of full charge has been obtained. Then the battery symbol will
remain fully illuminated and the charge LED will be green while the battery is trickle charged to its
full capacity.
• If a problem is detected during charging, the battery symbol will flash and the charge LED will be
orange. Disconnect the device from the power module and reconnect it to the power module to
reset the charge cycle.
• During periods of non-use, the charger may remain connected to the device/battery pack.
• Minimum and maximum ambient temperature to charge the device is 10 °C (50 °F) and 35 °C
(95 °F), respectively.
• For best results, charge the device at room temperature 23 °C (73 °F).
2.5 Viewing Additional Pages
The Main Screen appears at device turn-on.
Optional displays can be viewed by pressing the button to move to:
Bump Mode
(1) To select the Bump mode, press the qbutton.
(2) To move forward, press the button.
(3) To move backward to the Main page, press the button.
Peak Readings (PEAK page)
The peak icon (chapter 2.3 "On-Screen Indicators") shows the highest levels of gas recorded by the
device since turn-on or since peak readings were reset.
To reset the peak readings:
(1) Access the PEAK page.
(2) Press the button.
Allow very hot or cold devices to stabilize for one hour at room temperature before
attempting to charge.

ALTAIR®4XR 16
Description
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Minimum Readings (MIN page)
This page shows the lowest level of oxygen recorded by the device since turn-on or since the MIN
reading was reset.
The minimum icon (chapter 2.3 "On-Screen Indicators") appears on the display.
To reset the MIN reading:
(1) Access the MIN page.
(2) Press the button.
Short Term Exposure Limits (STEL page)
WARNING!
If the STEL alarm activates, leave the contaminated area immediately; the ambient gas concentration
has reached the preset STEL alarm level. Failure to follow this warning will cause over-exposure to
toxic gases and persons relying on this product for their safety could sustain serious personal injury or
death.
The STEL icon (chapter 2.3 "On-Screen Indicators") appears on the display to show the average
exposure over a 15 minute period.
When the amount of gas detected by the device is greater than the STEL limit:
• Alarm sounds
• Alarm LEDs flash
• STEL icon flashes.
To reset the STEL:
(1) Access the STEL page.
(2) Press the button.
The STEL alarm is calculated over a 15 minute exposure.
STEL calculation examples:
Assume the device has been running for at least 15 minutes:
15 minute exposure of 35 ppm:
10 minute exposure of 35 ppm and 5 minutes exposure of 5 ppm:
This page can be de-activated through MSA GALAXY GX2 Test Stand or MSA Link.
(15 minutes x 35 ppm) = 35 ppm
15 minutes
(10 minutes x 35 ppm) + (5 minutes x 5 ppm) = 25 ppm
15 minutes

ALTAIR®4XR 17
Description
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Time Weighted Average (TWA page)
WARNING!
If the TWA alarm activates, leave the contaminated area immediately; the ambient gas concentration
has reached the preset TWA alarm level. Failure to follow this warning will cause over-exposure to toxic
gases and persons relying on this product for their safety could sustain serious personal injury or death.
The TWA icon (chapter 2.3 "On-Screen Indicators") appears on the display to show the average
exposure since the device was turned on or since the TWA reading was reset. When the amount of
gas detected is greater than the eight-hour TWA limit:
• Alarm sounds
• Alarm LEDs flash
• TWA icon flashes.
To reset the TWA:
(1) Access the TWA page.
(2) Press the button.
The TWA alarm is calculated over an eight-hour exposure.
TWA calculation examples:
1 hour exposure of 50 ppm:
4 hour exposure of 50 ppm and 4 hour exposure of 100 ppm:
12 hour exposure of 100 ppm:
This page can be deactivated through the MSA GALAXY GX2 Test Stand or MSA Link software.
Time Display
Current time appears on the display in a 12-hour format by default.
A 24-hour format can be selected using MSA GALAXY GX2 Test Stand or MSA Link.
Date Display
Current date appears on the display in the format: MMM-DD-YYYY.
Discoverable Mode page
Allows the user to put the device into Bluetooth discoverable mode in order to pair with another device.
This page can be deactivated through the BT SETUP page.
(1 hour x 50 ppm) + (7 hours x 0 ppm) = 6.25 ppm
8 hours
(4 hours x 50 ppm) + (4 hours x 100 ppm) = 75 ppm
8 hours
(12 hours x 100 ppm) = 150 ppm
8 hours

ALTAIR®4XR 18
Description
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Motion Alert Activation
To activate or deactivate the Motion Alert feature, press the button while the Motion Alert Activation
page is displayed. When the Motion Alert feature is active, the Motion Alert symbol (chapter 2.3
"On-Screen Indicators") will flash every 3 seconds. The device will enter pre-alarm when no motion is
detected for 20 seconds. This condition can be cleared by moving the device.
After 30 seconds of inactivity, the full Motion Alert alarm is triggered. This alarm can only be cleared by
pressing the button.
2.6 Sensor Missing Alarm
The device enters the Sensor Missing alarm if the device detects that the sensor is not properly
installed in the device or is not functional.
If a sensor is detected as missing, the following occurs:
•"SENSOR ERROR" displays.
• The flag above the sensor detected as missing flashes on the display.
• Alarm sounds and lights flash.
• Yellow Fault LED is on solid.
• If there is a sensor error at startup, the device shuts off in 60 seconds.
2.7 Sensor End of Life Warning
If a sensor is nearing its end of life, the device will warn the user following a sensor calibration. The
sensor is still fully functional at this point, but the warning gives the user time to plan for a replacement
sensor and minimize downtime. The symbol will be continuously displayed. For more details see
chapter 3.10 "Calibration".
2.8 Sensor End of Life Indicator
If the device cannot calibrate one or more sensors, the device will display "SPAN ERR" followed by the
Alarm symbol and symbol to indicate end of sensor life. For more details see chapter 3.10 "Calibra-
tion".
2.9 Monitoring Toxic Gases
The device can monitor the concentration of the following toxic gases in ambient air:
• Carbon Monoxide (CO)
• Hydrogen Sulfide (H2S)
• Sulfur Dioxide (SO2)
• Nitrogen Dioxide (NO2)
The device displays the gas concentration in parts per million (PPM) or mg/m3on the Normal Opera-
tions page until another page is selected or the device is turned off.
WARNING!
If an alarm activates while using the device, leave the area immediately.
Remaining in the area under such circumstances can cause serious personal injury or death.
The device has four gas alarms for each toxic gas:
•HIGHAlarm
•LOWAlarm
•STELAlarm
•TWAAlarm

ALTAIR®4XR 19
Description
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If the gas concentration reaches or exceeds the alarm set point, the device:
• backlight turns on
• triggers a vibrating alarm
• displays and flashes the Alarm symbol and either the Minimum icon (LOW alarm) or the Maximum
(PEAK) icon (HIGH alarm)
• enters an alarm state.
2.10 Monitoring Oxygen Concentration
The device monitors the oxygen concentration in ambient air. The alarm set points can be set to acti-
vate on two different conditions:
• Enriched - oxygen concentration > 20.8% or
• Deficient - oxygen concentration < 19.5%.
While the device can detect up to 30% oxygen in the ambient air, it is approved for use only up to 21%
oxygen-content.
WARNING!
If an alarm activates while using the device, leave the area immediately.
Remaining in the area under such circumstances can cause serious personal injury or death.
When the alarm set point is reached for either of the above conditions:
• an alarm sounds
• alarm LEDs flash
• a vibrating alarm triggers
• device displays and flashes the Alarm icon and either the Minimum icon (Enriched alarm) or the
Maximum icon (Deficient alarm) (chapter 2.3 "On-Screen Indicators") along with the corre-
sponding oxygen concentration.
When a gas reading exceeds the full scale range of the sensor, the device displays "+ +
+" in place of the actual reading.
When a gas reading falls below a defined under-range threshold, the device displays " -
- -" in place of the actual reading.
The LOW alarm (oxygen deficient) is latching and will not automatically reset when the
O2concentration rises above the LOW set point. To reset the alarm press the button.
If the alarm condition still exists, the button only silences the alarm for five seconds.
False oxygen alarms can occur due to changes in barometric pressure (altitude) or
extreme changes in ambient temperature.
It is recommended that an oxygen calibration be performed at the temperature and pres-
sure of use. Be sure that the device is in known fresh air before performing a calibration.
When a gas reading exceeds the full scale range of the sensor, the device displays "+ +
+" in place of the actual reading.
When a gas reading falls below a defined under-range threshold, the device displays " -
- -" in place of the actual reading.

ALTAIR®4XR 20
Description
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2.11 Monitoring Combustible Gases
The device can monitor these concentrations in ambient air:
• Methane
• Combustible gases
The device displays the combustible gas concentration in % LEL or % CH4on the Measuring page until
another page is selected or the device is turned off.
WARNING!
If an alarm activates while using the device, leave the area immediately.
Remaining in the area under such circumstances can cause serious personal injury or death.
The device has two alarm set points:
•HIGHAlarm
•LOWAlarm
If the gas concentration reaches or exceeds the alarm set point, the device:
• backlight turns on
• a vibrating alarm triggers
• displays and flashes the Alarm symbol and either the Minimum icon (LOW alarm) or the Maximum
(PEAK) icon (HIGH alarm)
• enters an alarm state.
WARNING!
A combustible gas reading of “100” or “5” indicates the atmosphere is above 100% LEL or 5.00% vol
CH4respectively, and an explosion hazard exists. Move away from contaminated area immediately.
In such cases, the device enters a Lock Alarm state.
When a gas reading reaches 100% LEL or 5.00% CH4, the device enters a Lock Alarm
state: the combustible sensor shuts down and displays “XXX” in place of the actual
reading. This state can only be reset by turning the device off and on in a fresh air envi-
ronment.
When a gas reading falls below a defined under-range threshold, the device displays " -
- -" in place of the actual reading.
Check your national standard values for 100 % LEL (EN60079-20-1).