RPB GX4 08-400 User manual

INSTRUCTION MANUAL
GX4 GAS MONITOR
Employers: Read this manual, the respirator and the flow control
device Instruction Manual and carry out the Employer Responsibilities
(page 7).
Product users: Read this manual, the respirator and the flow control
device Instruction Manual and follow the Product User Safety
Instructions (page 9).
Manuals are regularly updated. Make sure the most recent version of
manual is available to all users for reference.
Current version of manual and other languages: www.rpbsafety.com/
product/gx4-gas-monitor/
®
Protecting you for Life’s best moments®

2
GX4 GAS MONITOR
®
EXPLANATION OF SIGNAL WORDS AND SYMBOLS 2
INTRODUCTION 3
IMPORTANT SAFETY INFORMATION
PROTECTION PROVIDED AND LIMITATIONS 4
TYPICAL SUPPLIED AIR SETUP 5
AIR SOURCE, FITTINGS, AND PRESSURE 6
EMPLOYER RESPONSIBILITIES 7
PRODUCT USER SAFETY INSTRUCTIONS 9
SETUP AND OPERATION 10
WIFI CONNECTION 11
WEBSITE 12
UNIT SETUP 13
MENUS 21
ALARMS AND SETTINGS 22
POWER AND CHARGING 24
MAINTENANCE 25
MANIFOLD 25
CLEANING 27
SENSOR CHECK 27
PARTS AND ACCESSORIES 30
WARRANTY AND LIABILITY STATEMENT 32
CONTENTS
RPB®Safety LLC is an ISO9001 certified company.
The following signal word and safety symbols are used in this manual and product labeling:
WARNING indicates a hazardous situation that, if not avoided, could
result in death or serious injury.
DANGER Indicates a hazardous situation that, if not avoided, will result
in death or serious injury.
Read the Instruction Manual.
Additional copies of RPB®manuals can be found at www.rpbsafety.com.
EXPLANATION OF SIGNAL WORDS AND SYMBOLS
WARNING
DANGER

3
RPB®SAFETY - GLOBAL HEADQUARTERS
2807 Samoset Rd, Royal Oak, MI 48073, USA.
T: 1-866-494-4599 F: 1-866-494-4509 E: [e-mail] rpbsafety.com
RPB®SAFETY - APAC
1 Ivan Jamieson Place, Christchurch Airport, Christchurch 8053 New Zealand.
T: [phone] F: [phone] E: [e-mail] rpbsafety.com
RPB®SAFETY - EMEA
Unit 2, Teardrop Industrial Park, London Road, Swanley, BR8 8TS, United Kingdom
T: [phone] E: [e-mail] rpbsafety.com
Copyright ©2019 RPB Safety, LLC. All rights reserved. All materials contained on this
website are protected by United States copyright law and may not be reproduced, distributed,
transmitted, displayed, published or broadcast without the prior written permission of RPB
Safety, LLC. You may not alter or remove any trademark, copyright or other notice from
copies of the content.
All trademarks, service marks, and logos used in this publication, both registered and
unregistered, are the trademarks, service marks, or logos of their respective owners. The
green and gray color combination is a registered trademark of RPB Safety, LLC. All rights in
the RPB Intellectual Property contained in this publication, including copyright, trademarks,
service marks, trade secret, and patent rights are reserved. RPB Intellectual Property means
any patent, patented articles, patent applications, designs, industrial designs, copyrights,
software, source code, database rights, moral rights, inventions, techniques, technical data,
trade secrets, know-how, brands, trademarks, trade names, slogans, logos, and any other
common law and proprietary rights, whether registered or unregistered anywhere in the
world, that are owned by, developed in whole or in part by, or licensed by RPB Safety, LLC.
For technical assistance contact our Customer Service Department at 1-866-494-4599 or
email: [e-mail]
Form #: 7.20.533
Rev: 4
INTRODUCTION
The RPB®GX4®, model 08-400, tests the quality of compressed breathing air for Carbon
Monoxide and other gases* depending on which gas sensor cartridges are installed.
Compressed Air is supplied to the unit through the sampling hose at a constant flow to the
sensors for continuous analysis.
*Visit www.rpbsafety.com/product/gx4-gas-monitor/ for a list of available gas sensors. There
are currently 3 different sensors available. More are in development for future release.
Current sensors available: Carbon Monoxide, Oxygen, Hydrogen Sulfide
This product must be inspected and maintained in accordance with this instruction manual at
all times.
See PROTECTION PROVIDED AND LIMITATIONS (page 4) for details.

4
GX4 GAS MONITOR
®
SUPPLIED AIR
The RPB®GX4®monitors the gas level in the breathing air. Cartridges are available to detect
Carbon Monoxide (5 or 10ppm depending on the requirements of your region), Oxygen, and
Hydrogen Sulfide. Visit www.rpbsafety.com/product/gx4-gas-monitor/ for a list of available
gas sensors. The GX4®DOES NOT remove any gasses from the air.
HAZARD LIMITATIONS
The RPB®GX4®is NOT FOR USE if:
The temperature is outside the range of 32°F to 113°F (0°C to +45°C).
A flammable or explosive atmosphere is present; this product is NOT intrinsically safe.
STANDARDS AND REGULATIONS
The RPB®GX4®monitor supplied air to meet or exceed CGA Grade-D specifications for air
quality as adopted by OSHA,. Refer to the following standards and regulations, depending on
the location the GX4®is being used, for more information:
ANSI/Compressed Gas Association Commodity Specification for Air, G-7.1-1989.
Federal OSHA 29 CFR 1910.134 “Compressor Operations for Breathing Air”
Army Corps of Engineers EM385-1-1, Section 30.F.04.
EN 12021 :2014 Respiratory equipment. Compressed gases for breathing apparatus.
AS/NZS 1715:2009 Selection, use and maintenance of respiratory protective equipment.
The GX4®can monitor the carbon monoxide and oxygen levels with the appropriate sensor
cartridges installed, but additional air testing/sampling will be required to meet ANSI/
PROTECTION PROVIDED AND LIMITATIONS
Improper selection, use, or maintenance of respiratory protection
products can result in injury; life threatening delayed lung, skin or eye
disease; or death. This product is intended for occupational use in accordance with applicable
standards or regulations for your location, industry, and activity (see Employer Responsibilities,
page 7). Familiarity with standards and regulations related to the use of this protective equipment
is recommended, even if they do not directly apply to you. If self-employed or if used in a non-
occupational setting, refer to Employer Responsibilities and Product User Safety Instructions.
Go to rpbsafety.com/importantsafetyinformation/ for helpful links to OSHA, EN and AS/NZS
standards, and other content.
Employers: Read this manual, the respirator, and the flow control device Instruction Manuals and
carry out the Employer Responsibilities (page 7).
Product users: Read this manual, the respirator, and the flow control device Instruction Manuals
and follow the Product User Safety Instructions (page 9).
Check website for updates. Product manuals are regularly updated.
Visit www.rpbsafety.com/resources/for the most recent version of this manual before using the
product.
IMPORTANT SAFETY INFORMATION
WARNING

5
1. RESPIRATOR
HEADTOP
ASSEMBLY
(NOVA 3®SHOWN)
2. BREATHING
TUBE
ASSEMBLY
AND FLOW
CONTROL
DEVICE
3. BREATHING
AIR LINE
4. RADEX®
AIRLINE
FILTR ATION
SYSTEM
5. GX4®GAS
MONITOR
TYPICAL SUPPLIED AIR SETUP
FIGURE 1.1
POINT OF
ATTACHMENT
(Continued from page 4)
Compressed Gas Association Commodity Specification for Air, G-7.1-1989 Grade D or better
air, EN 12021, or AS/NZS 1715 requirements. See Employer Responsibilities section for the
other components that need to be sampled.
The RPB®GX4®when used with the Carbon Monoxide Sensor Cartridge 08-420-01 satisfies
the requirements of OSHA rule 29 CFR 1910.134 for carbon monoxide monitoring.

6
GX4 GAS MONITOR
®
AIR SOURCE, FITTINGS, AND PRESSURE
AIR SOURCE
Locate the air source being supplied to the respirator and being monitored by the GX4®in a
clean air environment. Make sure the air source is somewhere that vehicles, forklifts, and
other machinery are not running near the air inlet, as this will cause carbon monoxide to be
drawn into your air supply.
Do not connect the respirator’s air supply that is being monitored by
the GX4®to nitrogen, toxic gases, inert gases or other non-breathable
air sources. Check the air source before using the GX4®and the respirator. Connecting the supply
hose to a non-breathable air source will result in serious injury or death.
AIR FILTRATION
Always use a filter on the inlet of your air source as required by 29 CFR 1910.134(i). Refer to
the compressor manufacturer’s instruction manual for recommendations on setting up the
compressor for breathing air and for suitable in-line air-purifying sorbent beds and filters.
Always use suitable after coolers/dryers with filters.
Use the GX4®with an airline filter, such as the RPB®RADEX®Airline Filter 04-900. The
monitor must be supplied with air free of oil and water to prevent contamination of the
sensors. A micro-mist filter, such as the RPB®Micro Mist Filter 04-925, prior to the Radex air
filtration system is recommended to protect the GX4®and the operator(s). Check with your
local regulatory bodies for more information on local requirements.
REQUIRED AIR QUALITY MONITORING
Check your local standards for requirements (see page 4).
Air quality must be tested at the time of initial setup from the point of attachment (the airline
filter outlet to the respirator).
Breathing air quality should be continuously monitored and/or periodically tested for at least
the following air components (Check your local standards for requirements, see page 4):
O2 - Oxygen
CO2 - Carbon Dioxide
CO - Carbon Monoxide
H2O - Water (Moisture Content)
Hydrocarbons (Oil Mist)
Total Particulates
The GX4®monitors Carbon Monoxide and Oxygen when equipped with the correct sensors.
Other components will need to be monitored separately.
Retesting the air quality is recommended If the compressor is moved or if the compressor
location or environment significantly changes.
DANGER

7
EMPLOYER RESPONSIBILITIES
Your specific responsibilities may vary by location and industry, but in general RPB®expects that
employers will:
Follow all applicable standards and regulations for your location, industry, and activity.
Depending on your location and industry, a number of standards and regulations may apply
to your selection and use of respirators and other personal protective equipment. There also
may be requirements specific to particular contaminants, e.g. silica (see rpbsafety.com/
importantsafetyinformation/ for more information), asbestos, organic pathogens, etc. Know
which requirements apply to your location and industry.
Have appropriate safety programs in place.
Have and follow:
 A workplace safety program.
 A written respiratory protection program in accordance with applicable standards and
regulations.
In accordance with the above,
Perform a hazard analysis and select appropriate equipment for each activity. A hazard
analysis should be performed by a qualified person. Controls should be in place as
appropriate and a qualified person should determine what kind of respiratory protection
is appropriate for the intended activities and environments of use. (For example, select
gas sensor cartridges appropriate to the specific airborne hazards, with consideration of
workplace and user factors.)
As applicable, check your workplace safety program, respiratory protection program, and
standards and regulations for your activity or industry for related protection requirements,
and see this manual (Protection Provided and Limitations, page 4) and the respirator
Instruction Manual for product specifications.
Be sure employees are medically qualified to use a respirator.
Have a qualified physician or other licensed health care professional (PLHCP) perform
medical evaluations using a medical questionnaire or an initial medical examination per
OSHA 29 CFR 1910.134 or local standards as required.
AIR PRESSURE
The air source supplied to the GX4®needs to be regulated between 7
to 80 PSI (50-550 kPa). Maximum air flow is achieved at 20 PSI. It
is recommended to supply the GX4®with 15-20 PSI. Max pressure is 80 PSI.
The optional RPB®Regulator Assembly 08-470 can be used to regulate the air pressure
going into the GX4®. If more than 80 PSI is supplied to the GX4®the low flow alarm will sound
and there will not be enough air flow for the sensors to monitor the air.
WARNING

8
GX4 GAS MONITOR
®
Train employees in the GX4®’s use, maintenance, and limitations.
Appoint a qualified individual who is knowledgable about the RPB®GX4® to provide
training:
Ex.: ANSI/ASSE Z88.2 Section 8.1 Qualifications of the Respirator Trainer. Anyone
providing training shall:
a) be knowledgable in the application and use of the monitor(s);
b) have practical knowledge in the selection and use of the monitor(s) and work
practices at the site;
c) have an understanding of the site’s respirator program; and
d) be knowledgable of applicable regulations.
Train each GX4®user in the product’s use, application, inspection, maintenance, storage,
and limitations in accordance with the content of this Instruction Manual and the
approved respirator Instruction Manual and standard or regulatory requirements. Ensure
that each intended user reads each of these manuals.
Ensure that equipment is properly set up, used, and maintained.
Make sure that equipment is properly set up, inspected, fitted, used, and maintained,
including selection of the appropriate gas sensor cartridge for the application.
Make sure the area is ventilated and monitored:
Ventilate and monitor the air in the work area as required by local standards and
regulations.
If you have any questions, contact RPB®.
Call Customer Service Department at:
Tel: [phone]
Email: [e-mail]
Web: rpbsafety.com
EMPLOYER RESPONSIBILITIES CONTINUED

9
PRODUCT USER SAFETY INSTRUCTIONS
BEFORE INITIAL USE - BE TRAINED
Do not use this gas monitor until you have read this manual and the respirator Instruction Manual
(additional copies available at www.rpbsafety.com/resources/) and been trained in the monitor’s
use, maintenance, and limitations by a qualified individual (appointed by your employer) who is
knowledgable about the RPB®GX4®Gas Monitor.
MAKE SURE THE SYSTEM IS READY FOR USE
Use only authentic RPB®brand parts and components. Using incomplete or inappropriate
equipment, including the use of counterfeit or non-RPB®parts, can result in inadequate function.
Do not modify or alter any part of this product.
Inspect all components daily for signs of damage or wear and tear that may reduce the level
of function originally provided. Remove any damaged component or product from service until
repaired or replaced.
Make sure that the monitor is correctly assembled in the configuration that suits your application.
BEFORE USING THE GX4®:
Make sure the area is ventilated and monitored:
Make sure that the area is well ventilated and that regular air samples are taken to confirm the
atmosphere stays within the levels recommended by OSHA and other governing bodies.
If you have any questions, ask your employer.
DO NOT USE THE GX4®IN THE WORK AREA if any of the following conditions exist:
The temperature is outside the range of 32°F to 113°F (0°C to +45°C).
A flammable or explosive atmosphere is present; this product is NOT intrinsically safe.
LEAVE THE WORK AREA IMMEDIATELY IF:
Any product component becomes damaged.
Airflow stops or slows down.
The alarm in the GX4®or other alarm, such as a strobe and alarm, connected to the GX4®
sounds. Check air source and wait until alarm mode stops. If it continues, verify sensor
calibration or change your air source.
PRODUCT CARE
Never place the GX4®on hot surfaces. Do not apply paints, solvents, adhesives or self-
adhesive labels except as instructed by RPB®. This product may be adversely affected by
certain chemicals.
Clean with mild detergent and a soft cloth or a cleaning wipe, being careful to avoid getting the
monitor wet. See the “Maintenance” section for more specific cleaning instructions.
Regular testing of the alarm and cartridges is required to detect system failures and
calibration. Always wear hearing protection when testing the alarm.

10
GX4 GAS MONITOR
®
Do not open the monitor casing. The unit will not work as intended if opened.
Only remove replaceable parts as listed in the parts and accessories. Do NOT remove any
part of the GX4®, especially the air inlet fitting or the power and auxiliary receptacles under
any circumstances. Removing any part will void all warranties.
Do not cover or disconnect the warning alarm that is inside of the unit.
The unit must be returned to RPB®Safety to perform any repairs.
REGISTRATION
Go to: http://go.myrpb.com/GX4-reg to register your GX4®and be notified of software updates
and important product information.
UPDATES
The GX4®firmware should be updated regularly to ensure you have access to the latest
features and maintain compatibility with the latest cartridges. Check for updates every
three months or when installing a new cartridge. Visit http://go.myrpb.com/GX4-Update for
information on the latest software and how to upgrade your unit.
SENSOR CHECK
Checks should be performed when a new cartridge is installed and monthly thereafter. This
will insure the cartridge is within calibration and providing adequate protection.
Follow the Sensor Check instructions on page 22 to check the calibration of the cartridges. If
the cartridge is no longer within calibration, follow the instructions for removing it and replace
it with a new cartridge.
LOCATION
Place the GX4®in a location that protects it from water, impact, and harmful contaminants
as well as away from carbon monoxide or other contaminants that could interfere with the
readings from the sensor cartridges (e.g., away from vehicles, forklifts and other machinery).
Ensure that the alarm can be easily heard in the work area over any other noise that may be
present. It may be necessary to use an external alarm (see p. 16 for setup instructions.)
See mounting instructions on p. 13.
SETUP AND OPERATION
PRODUCT USER SAFETY INSTRUCTIONS CONTINUED
Sensors cartridges may contain sulfuric acid or other hazardous
chemicals which are poisonous and can cause burns or eyesight loss. Do not break open
the sensor cartridge or crush it, as the chemicals inside may be released.
WARNING

11
WIFI CONNECTION
To utilize all of the features of the GX4®, it is recommended to connect it to the internet via
the built-in wireless network transceiver. This connection allows easy firmware upgrades and
the unit hosts a website available to devices on that network. Use the website to stream real-
time gas levels, search through logs or print reports that can be used for safety records and
meetings. This real-time monitoring does not replace the need for an audible of visual alarm
the respirator wearer.
The GX4®can operate in two wireless modes. To select a mode in the Menu go to Network
and then Mode. Use the arrow keys to switch between modes and press OK to select a mode.
The unit will restart and resume operation in this network mode.
CLIENT MODE:
Use when you have access to a wireless
network {IEEE 802.11 b/g/n}.
The GX4®must be connected to the same
network as your PC/Tablet/Smartphone
Access the GX4®website through your
internet browser.
Multiple GX4®s can be connected in
Client Mode to the same network and
each individual GX4®website can be
viewed on a separate web browser page.
HOTSPOT MODE:
Use to connect directly to your GX4®when
you do not have access to an existing
network.
The GX4®Hotspot Mode does not
connect to the internet.
Devices can only connect to one GX4®in
Hotspot Mode at a time.
For multiple GX4®s, disconnect from one
before connecting to another.
Note: Although multiple devices can
connect, the GX4®is not a router. When
in Hotspot Mode your device can only
communicate to the host GX4®.
To configure your network see page 12.
Client Mode
Wireless
Router
or or
PC Tablet Smartphone
PC
GX4
Client Mode
Internet
Hotspot Mode
or or
PC Tablet Smartphone
GX4
Hotspot Mode
Internet
*Limited
Connectivity
PC
or
FIGURE 2.1 FIGURE 2.2

12
GX4 GAS MONITOR
®
WEBSITE
The GX4®has an internal website that can be accessed by internet enabled devices. This
allows the user to view information about the unit and change settings such as the network
connection. This is your portal to access the full potential of the GX4®.
To access the website for your GX4®from your internet connected device:
IN HOTSPOT MODE:
Browse to http://192.168.1.3/
IN CLIENT MODE:
Locate the IP Address for your unit in the “About” menu.
Make sure the GX4®and your internet enabled device are on the same network.
Type the IP address into your internet browser, http://<IP Address>/
FEATURES
The internal GX4®website provides the following features:
Dashboard Page
Status of the unit (Power, Alarm, Auxiliary...)
Power
Air Supply
Network Connection
Auxiliary connection
Links to logs, certificates and more
Status of each cartridge
Type of gas being monitored
Current reading
Last validation date
Expiration date, and more
Logs
Select a date(s) to view logs from
Logs show events such as alarms, sensor
checks, warnings, etc.
Export visible logs as a CSV file for all logs or
main events
Certificate of Calibration
Printable report of the last sensor checks for
each cartridge.
To save as a PDF, use a PDF printer driver or a browser with PDF functionality.
FIGURE 2.3
SETUP AND OPERATION CONTINUED

13
Position the monitor so that the green
brackets on the back line up with the
mounting bracket on the side of the
RADEX®, turn clockwise until the monitor
clicks into place.
Use the wall bracket (P/N: 08-231) and
appropriate screws to secure the wall
mounting bracket to a suitable wall. The
countersunk holes are 7/32” (5mm) and the
smaller holes are 5/32” (4mm).
UNIT SETUP
Position the monitor so that the green
brackets on the back line up with the
mounting bracket, turn clockwise until the
monitor clicks into place.
MOUNTING TO A WALL BRACKET
FIGURE 3.1
FIGURE 3.2 FIGURE 3.3
MOUNTING TO A RADEX®FILTRATION UNIT

14
GX4 GAS MONITOR
®
Insert the 3/8” O.D. Air Supply Hose
08-428 into the push-lock fitting on the left
side of the monitor. To disconnect, press the
outside ring of the push-lock and pull the
hose out. Note: Hose can be trimmed to the
desired length.
CONNECT THE AIR SUPPLY
Connect the power supply by screwing it
onto the receptacle on the left side of the
unit (next to the air inlet fitting.) Plug the AC
Adaptor into a power source.
Connect the 08-470 regulator with Quick
Disconnect fitting into one of the outlets
on the Radex or other air source providing
GradeD or better air. Regulate the air from
the air source to between 7 to 80 PSI
(50-550 kPa) with the 08-470 regulator.
Maximum air flow is achieved at 20 PSI. It
is recommended to supply the GX4®with
15-20 PSI. Max pressure is 80 PSI. Pressure
above 80psi will close the regulator and
there will be no airflow to the monitor.
CONNECTING THE POWER SUPPLY
FIGURE 4.1
FIGURE 5.1
SETUP AND OPERATION CONTINUED
FIGURE 4.2
FIGURE 4.3
Connect the free end of the 3/8” O.D. Air
Supply Hose 08-428 into the one-touch
fitting on the 08-470 regulator.

15
WHEN USING A BATTERY:
Battery clips can be used on most 12V
batteries, such as on a car or truck, or on a
compressor. GX4®devices exposed to high
voltages will be permanently damaged and
will not be covered under the warranty.
Surges on some equipment (particularly
during startup/shutdown) can cause
extremely high voltages. Do not connect
the GX4®directly to 18V or 24V batteries. If
you must connect to a battery higher than
12V, RPB®highly recommends using an
appropriate DC-DC converter. A converter
will also help protect against power surges
and is recommended for use with 12V batteries as well. Consult your automotive or industrial
electrician for help with convertor selection and setup.
To avoid startup power surges while using Battery Clips (08-431), only connect the battery
clips when the vehicle or compressor is already running. Connect in the following order:
1. Red = +12V to the positive terminal of the battery.
2. Black =
If connecting to a vehicle or a compressor: connect the black clip to a bare metal ground
location on the vehicle or compressor.
If connecting to a battery only: connect the black clip to the negative terminal of the
battery.
Be sure to keep the GX4®as far away from the car, truck, or compressor exhaust as possible.
Exhaust fumes can interfere with the measurements of the sensors, particularly when the air
supply is not yet connected.
Refer to battery manufacturer and equipment manufacturer’s
instructions.
Explosion Hazard
Batteries emit explosive gasses during normal operation.
Keep sources of ignition away.
Work in a well-ventilated area
Avoid contacting/bridging terminals with metal objects - this can create sparks and
ignite gasses.
1 2
+ -
FIGURE 5.2
WARNING
To reduce the risk of battery fire or explosion or of fire or electric
shock with an external battery, follow the below electrical and battery precautions and
procedures.

16
GX4 GAS MONITOR
®
If using an external alarm device, connect
the plug into the auxiliary outlet. The use
of an external alarm is recommended
when the GX4®cannot be seen or heard
by the operator. The external alarm should
be located near the work area to alert the
operators of the status.
Alternatively, the auxiliary can control a
shut-off valve to the blasting nozzle, or to
an auxiliary strobe and alarm.
CONNECT THE EXTERNAL ALARM
To configure your own external device,
use the bare end AUX cable (08-434). It is
recommended to use a qualified electrician
when wiring to ensure you do not damage
the electrodes.
Incorrectly wiring your auxiliary can
permanently damage your unit.
Always use a qualified electrician.
Damage to the auxiliary is not covered
under the manufacturer’s warranty.
*The Warning Out signal is for a external
light tree or other warning device.
FIGURE 6.1
1. Brown - 12V DC
2. Blue - Alarm Out
3. Black - Ground
4. White - Warning
Out*
5. Green - OK Out
FIGURE 6.2
Corrosive Chemicals can Injure Eyes and Skin
Lead-Acid batteries contain sulfuric acid.
Wear complete splash-proof eye protection, face shield and protective clothing such as
apron and gloves when working near lead-acid batteries. Always have someone nearby
for help.
Have plenty of fresh water, soap and baking soda nearby for use, in case battery acid
contacts your eyes, skin, or clothing. Wash immediately with soap and water and seek
medical attention.
If battery acid comes in contact with eyes, flush eyes immediately for a minimum 10
minutes and get medical attention.
Neutralize any acid spills thoroughly with baking soda before attempting to clean up.
Shock and burn hazard
Remove all personal metal items from your body, such as rings, bracelets, necklaces
and watches. A battery can produce a short circuit current high enough to weld a ring to
metal, causing a severe burn.
For more information, consult your automotive or industrial electrician.
SETUP AND OPERATION CONTINUED

17
EXTERNAL WIRING DIAGRAM
Monitor
Aux Output
Output Specications V out with external supply = V in-1V V out with battery backup = 11.5V I out max = 500mA
Auxiliary Powered Light Tree External Powered Light Tree
+
-
Battery
13Wh
Protection
&
Management
NPN NPN NPN
1 2
1 2 3 4 5
V Out Alarm Ground Warning OK
Power Input10-16V DC
1 2 3 4 5
OK
Warning
Alarm
Note: External ground must match that of the power supply. (08-430 has a oating ground, so will adjust to suit.)
1 2 3 4 5
~
Not OK
OK
NC NO
Recommended Failsafe
The foll owing systemprovides the most fail safe protection:
Connect the coils ofa relay (12VDC, SPDT) to ports 1 and 5 of the GX4 auxiliaryreceptacle.
Connect your equipment into either the “OK”or“Not OK” positions of the circuit to alert
users of potenti al dangers.
Pin
1 2 3 4 5
Function Vout
Alarm Ground Warning OK
Voltage (Vin - 1) V
11.5V on Battery 12V DC 12V DC 12V DC 12V DC
Current 500 mA 750 mA 1,500 mA 750 mA 750 mA
1 2 3 4 5
OK
Alarm
Warning
12V
FIGURE 6.3

18
GX4 GAS MONITOR
®
To turn the unit on, press and hold the “OK”
button until the “rpb” logo appears on the
screen.
POWER ON
Tip: you can store the AC Adaptor between
the tabs on top of the mounting bracket.
Press and hold the “OK” button and the unit
powers down.
POWER OFF
FIGURE 7.1 FIGURE 7.2
FIGURE 7.3
SETUP AND OPERATION CONTINUED

19
GAS DETECTION CARTRIDGES
Each cartridge is represented by a box
on the home screen. Each box shows the
gas type, units of measure and the current
reading.
The gas detection sensors are supplied in
individual cartridges. Select the cartridge
for each gas you wish to detect at the
correct alarm threshold for your region.
(Some cartridges may look different than
others, but will work the same.)
Visit rpbsafety.com/product/gx4-gas-
monitor/ for a list of available sensors.
The cartridge will appear on the screen in
the box that correlates to the slot it was
placed in. The corresponding light above
the screen will glow red or green to indicate
the status. Instead of PPM, it will say
“WAIT” until the cartridge is recognized.
The unit can be on or off when inserting a
cartridge. Make sure the contacts are clean
before inserting a new cartridge. Rub the
contacts in the monitor with your finger or a
pencil eraser to make sure they are clean.
Insert the cartridge into any of the 4 slots
in the monitor. First locate the top end so
the tabs line up, then push the bottom until
it clicks.
CO 0
WAIT
Open
0
- - -
Open
0
- - -
Open
0
- - -
Gas
Value
Unit of
Measure
FIGURE 8.1 FIGURE 8.2
FIGURE 8.3 FIGURE 8.4
CO 0
PPM
Old
New

20
GX4 GAS MONITOR
®
Each monitor comes with 3 blank
cartridges. These should be placed into
slots that are not currently being used
to protect the contacts and air supply
manifold.
To remove a cartridge, press the
corresponding release button and the
cartridge will “pop up”.
REMOVE CARTRIDGE
Lift the edge of the cartridge to remove it
fully from the monitor. Replace with a new
cartridge or a blank sensor cartridge.
FIGURE 8.5 FIGURE 9.1
FIGURE 9.2
When the cartridge is removed, a Warning
will display on the screen. It will alarm after
a countdown if the warning is not cleared
before the countdown ends. Press the
button below the word “REMOVE” and then
confirm that the cartridge has been removed
on the next screen by pressing the button
below the word “OK” on the screen. Turning
the unit off will not clear this Warning. The
Warning will reappear when the unit is
turned back on and it can be cleared at that
time.
SETUP AND OPERATION CONTINUED