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RKI Instruments GX-3R Quick Reference Manual

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Gas Detection For Life
4
World's Smallest and Lightest
Gas Monitor
OSHA defines the breathing zone as a ten inch radius around the
worker's nose and mouth, and requires that worker exposure monitoring
air samples be collected in the breathing zone. Air sampling filters
may be attached to the collar or lapel. Traditionally this means only a
single gas monitor would be small enough for a worker to practically
wear a gas monitor 'In the breathing zone'. Now there is a 4 gas
monitor smaller than many single gas monitors.
The GX-3R is the worlds smallest 4 gas monitor weighing only 3.52
ounces and can comfortably be clipped within a worker's breathing
zone (2.2" W x 2.55" H x 1.02" D). It simultaneously monitors and
displays LEL combustibles, O2, CO (Hydrogen compensated CO also
available), and H2S.
The GX-3R represents the latest evolution of gas detection technology
utilizing a new generation of micro sensors. The LEL sensor has a
unique design with two active filaments in one sensor to increase it's
resistance to silicone poisoning. If one filament gets poisoned the
second filament takes over. The new O2 sensor is electrochemical with
a 3 to 5 year life span. H2S and CO are now available in a combo
micro sensor.
Safety supervisors will appreciate the non-compliance indicator. The
instrument flashes it's 3 LED lights every 30 seconds in the following
conditions; if the instrument has not been bump tested, or if calibration
is due, or if there was a gas alarm event. The 3 LED lights will continue
to flash once every 30 seconds until the non-compliance condition has
been resolved. The 30 second interval is adjustable.
•
RKI Instruments, Inc.
33248 Central Ave. Union City, CA 94587
SMALLEST & LIGHTEST 4 GAS MONITOR
Features
• Smallest & lightest 4 gas monitor
• Simultaneous detection of 4 gases
• Simple 2-button operation
• Non-Compliance Indicator
• Alarms: audible, visual, & vibration
• 3 user adjustable alarm levels
• Impact resistant body with removable rubber boot
• Large LCD Auto-backlit display
• 25 hours of operation (Lithium-ion battery)
• Field replaceable sensors & filters
• Water and dust resistant design, IP66/68
• Stealth mode for law enforcement
• 3 Year warranty
• Personal monitoring
• Confined spaces
• Refineries/petrochemical
• Utilities
World Leader In Gas Detection & Sensor Technology
www.rkiinstruments.com
— 2.2" W x 2.55" H x 1.02" D, 3.52 ounces
— LEL, O2, H2S & CO
— H2 Compensated CO sensor available
Applications
Bump test
Health Check
Indicator
LCD
Autobacklit
display
Removable
Impact resistant
boot
Easy to replace
color-coded
sensors
•
Phone (510) 441-5656
GX-3R Model
• Oil and Gas
• Water/wastewater
• Fire services
• Construction
H2 Compensated
passed
CO Sensor
available
Battery Life:
alarm LED's
Replaceable
Audible
Sensor/Filters
Alarm port
•
•
(800) 754-5165
Fax (510) 441-5650
G3R-2207/2000
25 hours
3 visual
2-Glove
friendly
button
operation

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Summary of Contents for RKI Instruments GX-3R

  • Page 1 Health Check 25 hours Indicator The GX-3R is the worlds smallest 4 gas monitor weighing only 3.52 ounces and can comfortably be clipped within a worker's breathing zone (2.2” W x 2.55” H x 1.02” D). It simultaneously monitors and displays LEL combustibles, O2, CO (Hydrogen compensated CO also available), and H2S.
  • Page 2 SDM-3R calibration station Optional RP-3R Clip-on sampling pump with 4” rubber nipple, 10’ hose and probe (up to 40’ hose available) Accessories Padded carrying case for GX-3R and accessories USB to IrDA downloading cable for datalogger Warranty Three years material and workmanship...
  • Page 3 It simultaneously monitors and displays 5 different gases. In addition to monitoring standard confined space gases, LEL, O2, CO, & H2S, the GX-3R Pro has a 5th channel where you can add infrared or toxic gas sensors. Two of the four sensor slots have interchangeable sensors...
  • Page 4 GX-3R Pro Model Detectable Gases Common Specification Measuring Range Diffusion sampling standard Preset Alarms Sampling Method (Increments) (hand aspirator or clip-on motorized pump optional) Sensor Slot 1: Carbon Monoxide (CO) & Hydrogen Sulfide (H2S) Display Full dot LCD with Autobacklight and Autorotation A1: 25 ppm │...

  • Page 5: Normal Operation

    GX-3R Quick Reference Guide Turn On POWER MODE Press & Hold Past Due Bump/CAL POWER To Bump / CAL MODE Confirm & Use Normal Operation After brief warm-up period Fresh Air Press & Hold Turn Off POWER MODE Press & Hold...
  • Page 6 Battery Indicator Confirmation reading Indicator POWER MODE GX-3R CO/H Audibe Alarm Port Alarm LED Sensors Scan QR code for GX-3R Manual RKI Instruments, Inc. 33248 Central Ave, Union City, CA 94587 Phone (510) 441-5656 • (800) 754-5165 • www.rkiinstruments.com 190422/1000...
  • Page 7 GX-3R Pro Quick Reference Guide Turn On POWER MODE Press & Hold Past Due Bump/CAL POWER To Bump / CAL MODE Confirm & Use Normal Operation After brief warm-up period Fresh Air Press & Hold Turn Off POWER MODE Press & Hold...
  • Page 8 GX-3R Pro CO/H CO/H S LEL O TOXIC Alarm LED Audibe Alarm Port Sensors Scan QR code for GX-3R Pro Manual RKI Instruments, Inc. 33248 Central Ave, Union City, CA 94587 Phone (510) 441-5656 • (800) 754-5165 • www.rkiinstruments.com 190422/250...
  • Page 9 6/28/24 GX-3R & GX-3R Pro Service Training Module Agenda • Display Mode • User Mode • Maintenance Mode • Gas Select Mode • Factory Mode • Calibration • Filter maintenance • Sensor replacement • Disassembly...

  • Page 10: Display Mode

    6/28/24 Display Mode • To enter Display Mode, press POWER/MODE when in normal operation/measurement mode. You will know you are in display mode if you see a display mode menu title on the bottom of your screen To return to normal operation, scroll all the way through the display menu using the...
  • Page 11 POWER/MODE • You will be returned to the previous screen Display Mode Display Mode menu options (GX-3R Pro only): • USER ID – View/change the User ID • STN ID – View/change the Station ID • INVERT SELECT – Screen auto rotation, ON/OFF •...

  • Page 12: User Mode

    6/28/24 User Mode To enter User Mode: • Make sure instrument is off • Press and hold “AIR” • Then press and hold “POWER/MODE” • Release after 1 beep User Mode PASSWORD • The default is set to OFF • If PASSWORD is set to on, then, “PASSWORD 0000” will be displayed •...
  • Page 13 • MAN DOWN – Turn Man Down and Panic alarms on/off, set intervals for Man Down alarm • AUTO BACKLIGHT – The GX-3R Pro’s backlight automatically turns on in a low-light environment, on/off • LANGUAGE - Set the language of the instrument (10 options) •...
  • Page 14 6/28/24 User Mode Navigation • To enter any menu option, select it and press the “POWER/MODE” button • To scroll to the next option press the “AIR” button EXAMPLE: CAL SET User Mode CAL SET • CAL RMDR – turn calibration reminders on or off (default is ON) •...

  • Page 15: Maintenance Mode

    6/28/24 Maintenance Mode To enter Maintenance Mode: • Make sure instrument is off • Press and hold “AIR” • Then press and hold “POWER/MODE” • Release after 2 beeps Maintenance Mode PASSWORD • The default is set to ON • If PASSWORD is required, then, “PASSWORD 0000” will be displayed •...
  • Page 16 RKI factory settings • START - start up and enter measurement mode Maintenance Mode menu options (GX-3R Pro only): • DATE FORMAT – Set the date format • LANGUAGE – Set the language of the instrument (10 options)
  • Page 17 6/28/24 Gas Select Mode Gas Select Mode is essential for changing target gases for each channel on your instrument, or for turning those channels off if desired. To enter Gas Select Mode: • Make sure instrument is off • Press and hold “AIR” •...
  • Page 18 6/28/24 Gas Select Mode Gas Select Mode menu options: • GAS COMB – Change target/cal gas for channels, turn channels ON/OFF • SAVE AP – Set current alarm points as default alarm points • MAX SPAN – Maximum span screen appears after calibration, ON/OFF •...
  • Page 19 6/28/24 Gas Select Mode CHANGE LEL: PPM Values for Different Standards Standard (ppm) IEC (ppm) ISO (ppm) Benzene (C6H6) 12,000 12,000 12,000 N-hexane (n-C6H14) 12,000 10,000 10,000 Toluene (C7H8) 12,000 10,000 10,000 N-heptane (n-C7H16) 11,000 8,500 8,000 Xylene (C8H10) 10,000 10,000 10,000 N-nonane (n-C9H20)
  • Page 20 6/28/24 Calibration Acknowledge Perform a calibration and use Press the If your instrument is Press the AIR POWER/MODE past its 90 day button to continue button to (factory set default) without performing perform calibration limit, you a calibration calibration. will see a CAL-LMT reminder at start-up Calibration •...
  • Page 21 (CAL RMDR) turn the instrument off and restart it in User Mode To enter User Mode: • Turn the GX-3R off • Press and hold the “AIR” button • Then press and hold the “POWER/MODE” button • Release after one beep...
  • Page 22 Press “AIR” to move to the next gas. Repeat as necessary • Select “ESCAPE” to return to the Auto Cal menu • Calibration Applying gas to the GX-3R • Attach a fixed flow regulator to the calibration gas cylinder • Attach the calibration adapter to the instrument and connect it to the 0.25...
  • Page 23 6/28/24 Calibration • “AUTO CAL/CYL A” should be alternating on the display • Press “POWER/MODE” • Apply gas until readings stabilize or for 2 minutes maximum • Press “POWER/MODE” Turn the gas regulator off Calibration • If the calibration is successful, the unit will read “PASS” •...

  • Page 24: Maintenance

    6/28/24 Calibration AUTO CAL pass • Remove the calibration adapter • The unit will read “PASS,” then go through its start up sequence and enter measurement mode, ready for use AUTO CAL fail • The unit will read “FAIL” and return to the AUTO CAL menu in User Mode NOTE: In the “CAL EXPD”...
  • Page 25 Filter for H2S/CO: 33-7130 (5 pk) LEL Sensor: NCR-6309 Scrubber Disk Filter for LEL: 33-7131 (5 pk) Sensor Dust Filter: 33-0183-10 (10 pk) – GX-3R 33-0184-10 (10 pk) – GX-3R Pro Sensor/Filter replacement Unscrew the screws on the bottom of the unit...

  • Page 26: Sensor Replacement

    6/28/24 Sensor/Filter replacement Use the flat side of your small screwdriver to gently pop up the edges of the sensor cap to remove it Sensor Replacement • Replace sensors when they cannot be calibrated or readings become unstable • Remember to always calibrate your instrument after replacing a sensor •...
  • Page 27 2000ppm H2 NCR-6309 – LEL ESR-A13P-CO - CO ESR-X13P-O2 – O2 ESR-A13i-H2S - H2S Sensor Replacement GX-3R Pro Only Sensors ESR-A13D-SO2 – SO2 ESR-A13D-NO2 - NO2 IRR-0409 - CO2, 0- 10% volume ESR-A13D-HCN - HCN IRR-0433 - CO2 0-...
  • Page 28 6/28/24 Disassembly • Turn the instrument off • Remove the rubber boot • Using a small Phillips head screwdriver, remove the 4 screws that are holding the 2 halves of the casing together Disassembly Grab the casing and separate it...
  • Page 29 6/28/24 Disassembly Gently grab the plastic tabs, and pull the display and buzzer straight out Disassembly Carefully detach the ribbon connector for the display from the board by very gently pulling it straight out. If you have a small plastic tool, use it. If not, your fingernail will do.
  • Page 30 6/28/24 Disassembly Display assembly pieces Disassembly Now remove the battery and board from the other side by unscrewing the 3 small screws, then pull the battery and PCB straight out to remove.
  • Page 31 Please note, the battery is soldered to the board so it is this whole PCB assembly that must be replaced. Disassembly Alkaline battery pack (optional) for the GX-3R Pro Turn the slot with your Screw the alkaline thumbnail until it aligns battery pack back with “open,”...
  • Page 32 RKI Instruments, Inc. • 33248 Central Avenue, CA 94587 • Phone (510) 441-5656 • (800) 754-5165 • Fax (510) 441-5650 World Leader In Gas Detection & Sensor Technology www.rkiinstruments.com...
  • Page 33 Weighing only 9.8 ounces, the GX-Force can monitor the standard confined space gases (LEL combustibles, Oxygen, Carbon Monoxide, and Hydrogen Sulfide). Utilizing the same micro-sensor technology, which are compatible with the GX-3R, GX-3R Pro, 04 Series, and Gaswatch 3 instruments.
  • Page 34 GX-Force Model Model GX-Force Sampling Method Internal sample pump, flow rate nominal 0.5 LPM, includes hydrophobic filter Suction Flow Rate Minimum 0.35 L/min (open flow rate) Gas Alarm Pattern Lamp flashing, continuous modulating buzzer sounding, gas concentration display flashing, vibration Gas Alarm Reset Operation Self-resetting or latching System, clock, or sensor abnormality;...
  • Page 35 GX-Force Quick Reference Guide Turn On POWER MODE Press & Hold Past Due Bump/CAL POWER To Bump / CAL MODE Confirm & Use Normal Operation After brief warm-up period Fresh Air Press & Hold Turn Off POWER MODE Press & Hold...
  • Page 36 GX-Force Quick Reference Guide Scan QR code for GX-Force Manual RKI Instruments, Inc. 33248 Central Ave, Union City, CA 94587 Phone (510) 441-5656 • (800) 754-5165 • www.rkiinstruments.com 230913/10000...
  • Page 37 11/8/23 GX-Force Service PowerPoint...

  • Page 38: Control Buttons

    11/8/23 Agenda • Control Buttons • Start-up procedure • Fresh air adjust • Display Mode • Calibration • Filter & sensor replacement Control Buttons GX-Force Button Function(s) • Turns on LCD backlight • Reset alarm button for latching alarms • Enters User Mode, Maintenance Mode, and Gas Select mode when used with POWER MODE •...

  • Page 39: Start-Up Procedure

    11/8/23 Start-up Procedure GX-Force Press and hold POWER MODE button. Release the button when you hear a beep. Start-up Procedure GX-Force Start-up sequence will commence If CAL.RMDR is set to ON (factory setting) and a calibration is due, the screen that appears next depends on the CAL.EXPD setting in User Mode.
  • Page 40 11/8/23 Start-up Procedure GX-Force Battery Voltage Target Gases Full Scale Start-up Procedure GX-Force Warning Alarm High Alarm...
  • Page 41 11/8/23 Start-up Procedure GX-Force STEL Normal Operation Screen Fresh Air Adjust GX-Force Verify that the instrument is in a fresh air environment Press and hold the AIR button Keep holding the AIR button until prompted to release it...

  • Page 42: Display Mode

    11/8/23 Display Mode GX-Force From the Normal Operation Screen ( Measuring Mode ) Press POWER/MODE to cycle through Display Mode’s menu items Flashlight Peak STEL Press AIR to turn on/off the light Display Mode GX-Force Press AIR to change HC Gas List HC Gas List Press POWER/MODE to continue to the next...
  • Page 43 11/8/23 Display Mode GX-Force Press AIR to display cal. data Calibration Data Press POWER/MODE to continue to the next display menu Display Mode GX-Force Press AIR to display snap log data Snap Log Data Press POWER/MODE to continue to the next display menu...
  • Page 44 11/8/23 Display Mode GX-Force Press AIR to display alarm points Date / Time / Temp Alarm Points Normal Operation Screen Press POWER/MODE to continue to the next display menu Calibration (GAS CAL) GX-Force Calibration Cylinder Demand Flow Regulator Tubing...
  • Page 45 11/8/23 Calibration (GAS CAL) GX-Force With the instrument off, Press AIR BUMP is the first menu to appear Press AIR to scroll to GAS CAL and then POWER/MODE to enter and then press POWER/MODE User Mode 2023 Calibration (GAS CAL) GX-Force AIR CAL appears on the screen.
  • Page 46 11/8/23 Calibration (GAS CAL) GX-Force • Press AIR to scroll to AUTOCAL • Press POWER/MODE to enter • Connect the demand flow regulator AUTOCAL to the calibration cylinder, attach the hose to the demand flow regulator and 2023 the instrument Calibration (GAS CAL) GX-Force •...
  • Page 47 11/8/23 Filter & Sensor Replacement GX-Force Take the GX-Force to a non-static environment and turn it off if it is on. Unscrew the four captive screws Filter & Sensor Replacement GX-Force Part # 21-1982 Lift up the Rear Case Assembly and set it aside...
  • Page 48 11/8/23 Filter & Sensor Replacement GX-Force Lift up the Filter Gasket, and replace if needed. Part # 07-6064 Filter & Sensor Replacement GX-Force Filter Part #’s 33-7130: Scrubber disk filter for dual CO/H2S 33-7131: Scrubber disk filter for LEL Scrubber disk filter for CO and CO(-H2) 33-7132: 33-7133: Humidity filter disk for H2S...
  • Page 49 11/8/23 Filter & Sensor Replacement GX-Force Lift up the Sensor Retainer, and replace if needed. Part # 21-1983 Filter & Sensor Replacement GX-Force Sensor Part #’s ESR-A13i-H2S: Sensor ESR-A1DP-COHS: Combo Sensor ESR-A13P-CO: Sensor ESR-A1CP-CO-H: with H2 comp. ESR-X13P-OXY: Sensor NCR-6309: LEL Sensor Lift up the Sensors, and replace if needed...
  • Page 50 11/8/23 Filter & Sensor Replacement GX-Force Remove the Rubber Nozzle and replace Remove the Filter Holder (twist it counter clockwise) and replace if needed. if needed. Part # 17-1001RK Part # 21-1833RK Filter & Sensor Replacement GX-Force Remove the Teflon Filter Disk and Wire Mesh Disk Filter Remove the Gasket and replace and replace if needed.
  • Page 51 ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ RKI Instruments, Inc. * 33248 Central Ave. * Union City CA 94587 * Rev. A...
  • Page 52 RKI Instruments, Inc. • 33248 Central Avenue, CA 94587 • Phone (510) 441-5656 • (800) 754-5165 • Fax (510) 441-5650 World Leader In Gas Detection & Sensor Technology www.rkiinstruments.com...

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