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RKI GX-Force Operator's Manual

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GX-Force
Operator's Manual
Part Number: 71-0626
Revision: A
Released: 6/5/24
RKI Instruments, Inc.
www.rkiinstruments.com

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Summary of Contents for RKI GX-Force

  • Page 1 GX-Force Operator’s Manual Part Number: 71-0626 Revision: A Released: 6/5/24 RKI Instruments, Inc. www.rkiinstruments.com...
  • Page 2 User Mode bump test or does not respond appropriately, as defined by the user, in Measuring Mode. For more information about bump test and calibration requirements, see IEC 60079-29-2. 2 • GX-Force Operator’s Manual...
  • Page 3 Phone (510) 441-5656 • (800) 754-5165 • www.rkiinstruments.com 230913/10000 Statement of Quality and Conformance RKI Instruments, Inc. certifies that this instrument has been tested, inspected, and calibrated by a qualified technician and was found to meet or exceed the manufacturer's specifications per ISO 9001 Quality System.

  • Page 4: Table Of Contents

    About the GX-Force ........
  • Page 5 Turning On the GX-Force ........
  • Page 6 Replacing a Sensor ............106 6 • GX-Force Operator’s Manual...
  • Page 7 Saving the Alarm Points (SAVE-AP) ......... . 131 GX-Force Operator’s Manual • 7...
  • Page 8 Display Mode, Leak Check Mode Operation ........144 Adjusting Leak Check Settings (GX-Force Setup Program) ......148 Appendix D: Interference Information .

  • Page 9: Chapter 1: Introduction

    Overview This chapter briefly describes the GX-Force portable gas monitor. This chapter also describes the GX-Force Operator’s Manual (this document). Table 1 and Table 2 at the end of this chapter list the GX-Force’s sensor and instrument specifications. About the GX-Force...

  • Page 10: Specifications

    ± 20% of reading ± 20% of reading The GX-Force is also available set up for general hydrocarbons and calibrated to a combustible gas other than methane, such as isobutane. Consult RKI Instruments, Inc. for further information. ** Indication accuracy specifications are measured at constant conditions.
  • Page 11 Table 2: GX-Force Specifications Sampling Sample Draw Method Response Time T90 within 30 seconds Display Graphics LCD Display • Operating pressure: 80 - 120 kPa (80 - 110 kPa for explosion-proof classification) Environmental Conditions • IP 67 Continuous environment: -20°C to 50°C/Below 90% RH Temporary environment (up to 15 minutes): -20°C to 60°C/Below 95% RH...

  • Page 12: About This Manual

    Approximately 173(H) x 64(W) x 47(D) mm (6.8” H x 2.5” W x 1.9” D) Weight Approximately 300 g (10.6 oz.) About this Manual The GX-Force Operator’s Manual uses the following conventions for notes, cautions, and warnings. NOTE: Describes additional or critical information. CAUTION: Describes potential damage to equipment.

  • Page 13: Chapter 2: Description

    Figure 1: Component Location Case The GX-Force’s sturdy, high-impact plastic case is radio frequency (RF) resistant and suitable for use in many environmental conditions, indoors and out. The case is dust-proof and water- resistant. A clear plastic window on the front of the case allows for LCD viewing.

  • Page 14: Lcd

    The digital LCD (liquid crystal display) simultaneously shows the gas reading for all installed sensors. The LCD also shows information for each of the GX-Force’s operating modes. WARNING: A thin protective film covers the display to prevent scratches during shipping.

  • Page 15: Buzzer

    Flow Chamber The flow chamber is on the back of the GX-Force and is held in place by four Phillips screws. The flow chamber seals to the rubber sensor gasket which seals to the sensor faces inside the GX- Force and routes flow from the pump to the sensors and to the exhaust port (on the back of the GX-Force case).

  • Page 16: Combustible Gas Sensor

    Dummy Sensors A dummy sensor is installed in any units that have less than 3 sensors. Dummy sensors are factory installed. The flat side of the dummy sensor faces away from the GX-Force and the hollow side faces toward the GX-Force.

  • Page 17: Inlet Filter Holder

    USB-C Data/Charging Port and Protective Cover A USB Type-C port is located on the bottom of the GX-Force, protected by a rubber cover. Pry off this cover when plugging in a USB Type-C cable (for charging or data transfer). A USB Type-C adapter cable can be connected to a computer’s USB port to transfer data to the GX-Force Data...

  • Page 18: Battery Pack

    Battery Pack A lithium ion (Li-ion) battery pack powers the GX-Force. At 25°C, the battery lasts at least 30 hours in Normal Mode and at least 20 hours in Leak Check Mode. The battery icon in the lower left corner of the LCD shows remaining battery life.

  • Page 19: Optional Accessories

    A 12 VDC adapter can be ordered for charging cable is equipped with a vehicle DC plug on one side and a USB-C plug on the other to plug into the GX-Force's USB-C charging and data port. GX-Force Operator’s Manual...

  • Page 20: Sample Hose & Probe

    Sample hose lengths are available from 3 feet to 100 feet (see “Chapter 8: General Parts List” on page 109). The quick connect end of the sample hose connects to the inlet fitting of the GX-Force and the probe screws onto the end of the hose with the threaded fitting.

  • Page 21: Chapter 3: Operation

    Measuring Mode. Start Up This section explains how to start up the GX-Force, get it ready for operation, and turn it off. WARNING: A thin protective film covers the display to prevent scratches during shipping. Remove this film before use. Leaving the film installed voids the intrinsically safe certification.
  • Page 22 Continue Accumulating: To continue accumulating peak and time-weighted average (TWA) readings from the last time the GX-Force was used, press POWER MODE or allow the countdown to reach 0. The short-term exposure limit (STEL) reading is reset each time the GX-Force is turned on.
  • Page 23 Buzzer sounds double pulsing Buzzer sounds double pulsing None tone tone • Option A, Perform bump • The GX-Force cannot be used • Option A, Perform bump Action test: Press POWER MODE until a successful bump test test: To perform a bump test, to perform a bump test.
  • Page 24 MANUAL Press POWER MODE to confirm the HC Gas List screen and continue to the Gas Name Screen. If POWER MODE is not pressed after 5 seconds, the GX-Force will automatically proceed to the next screen. NOTE: If your application requires detection of a gas still detectable after an HC Gas List condition (like methane or isobutane), there is no need to replace the combustible gas sensor.
  • Page 25 7:49 %LEL 18.0 30.0 7:49 %LEL ALARM 7:49 %LEL 23.5 1200 100.0 7:49 %LEL ALARM H 40.0 2000 200.0 7:49 F. S. 7:49 %LEL STEL 19.5 7:49 WARNING GX-Force Operator’s Manual Chapter 3: Operation • 25...
  • Page 26 USEr Id U_ID_001 S_ID_001 12. If the GX-Force experiences a sensor failure during start up, the display shows which sensor failed and the buzzer sounds a double pulsing tone once per second. In the example below, the combustible gas sensor failed.

  • Page 27: Performing A Demand Zero

    User Mode). KEY.TONE 4. Continue to hold AIR until the LCD prompts you to release it. The GX-Force sets the fresh air reading for all channels. Start up is complete and the unit is now ready for monitoring. 5. If...

  • Page 28: Turning Off The Gx-Force

    Turning Off the GX-Force 1. To turn off the GX-Force, wait for all readings to return to zero (20.9% for oxygen) and press and hold POWER MODE. NOTE: If any channel is displaying a non-fresh air reading during shutdown, the instrument will perform a purge to clear the internal pump system.

  • Page 29: Measuring Mode Operation

    Measuring Mode Operation When the GX-Force completes its startup sequence, it is in Measuring Mode. In Measuring Mode, the GX-Force continuously monitors the sampled atmosphere and displays the target gas concentrations. The GX-Force is considered to be in Normal Operation if there are no alarm indications.

  • Page 30: Monitoring An Area

    Monitoring an Area 1. Start up the GX-Force as described above in “Start Up” on page 21. It is now in Measuring Mode. 7:49 %LEL 20.9 2. Take the GX-Force to the monitoring area. 3. Wait at least 15 seconds and monitor the display for gas readings. Allow readings to stabilize to determine the gas concentrations present.
  • Page 31 7.69 Overscale Protection The GX-Force protects the combustible gas sensor by temporarily turning off the sensor power if levels exceeding 100% LEL are detected. Nevertheless, combustible gas concentrations above 100% LEL can still affect the zero level or calibration of the combustible gas sensor.

  • Page 32: Oxygen-Enriched Atmospheres

    (like methanol or ethanol), you must replace the combustible gas sensor as soon as possible. Oxygen-Enriched Atmospheres The GX-Force is not intended for use in oxygen-enriched atmospheres. WARNING: Do not use the GX-Force in an environment with an oxygen concentration above 21%. 32 • Chapter 3: Operation GX-Force Operator’s Manual...

  • Page 33: H 2 -Compensated Co Detection

    Alarm Indications The GX-Force buzzer sounds an alarm, the LEDs flash, and the vibrator pulses when any sort of alarm condition or failure occurs. If the GX-Force is operating in Stealth Mode, the buzzer does not sound and the vibrator’s operation depend on the setting in Gas Select Mode’s...
  • Page 34 Table 5 summarizes the types of alarms produced by the GX-Force and their indications. Table 5: Alarm Types and Indications Alarm Type Visual Indications Other Indications • Affected channel’s gas reading, gas • High-low tone sounding Warning name, and units flash...
  • Page 35 • FAIL appears in the middle of the screen Flow Failure Double pulsing tone once and FLOW appears at the bottom of the per second screen. • Alarm LEDs flash once per second GX-Force Operator’s Manual Chapter 3: Operation • 35...

  • Page 36: Responding To Alarms

    Responding to Gas Alarms 1. Determine which gas alarm has been activated. 2. Follow your established procedure for an increasing gas condition or a decreasing oxygen condition. 36 • Chapter 3: Operation GX-Force Operator’s Manual...
  • Page 37 3. Reset or silence the alarm as necessary or allowed. Alarm silence can be turned on or off using menu item in Maintenance Mode (see page 118) or the GX-Force Data ALM.SLNC Logger Management Program (see the GX-Force Data Logger Management Program Operator’s Manual).
  • Page 38 5. If the over range condition continues or if you are not able to successfully calibrate the unit, you may need to replace the sensor that has triggered the over range alarm. 6. If the over range condition continues after you have replaced the sensor, contact RKI Instruments, Inc. for further instructions.
  • Page 39 “Recharging the Lithium Ion Battery Pack” on page 99. The GX-Force is fully functional during a low battery warning. However, only 1-2 hours of operating time remain. The amount of operating time left depends on LCD backlight use and the alarm frequency.
  • Page 40 User Mode. See page 95. DATE 3. If the date cannot be set correctly, contact RKI Instruments, Inc. as soon as possible. Responding to a Flow Failure Alarm Flow failure alarms can be caused by clogged dust filters or blockages in the instrument’s internal flow paths.

  • Page 41: Error Code Explanation

    7:49 FAIL PUMP 2. The pump failure alarm indicates that the pump must be replaced. Contact RKI Instruments, Inc. to schedule replacement. Responding to System Failure Alarms 1. If a system failure occurs, the system failure screen displays an error code as shown below:...

  • Page 42: Saving Snap Log Data

    Saving Snap Log Data The GX-Force is capable of logging all channel readings at a given moment and can store up to 256 logs at one time. When the maximum number of logs has been reached, any new logs will overwrite the oldest data logged on the instrument.

  • Page 43: Data Logging

    The data logging capacity depends on how often the GX-Force stores data, how many channels are active, and how often the GX-Force is turned on and off. Table 8 illustrates how much data logging time is available for the various interval times. It assumes that the unit has three sensors, is only turned on once, and there are no alarm occurrences.

  • Page 44: Chapter 4: Display Mode

    (page 51) NOTE: Only appears if DISP.SET is set to ON in User Mode (factory setting) and if ID DISP is set to ON in Maintenance Mode (factory setting is OFF). 44 • Chapter 4: Display Mode GX-Force Operator’s Manual...

  • Page 45: Tips For Using Display Mode

    NOTE: With the exception of the screen, each screen displays for 20 seconds. If no PUMP.OFF button is pressed within 20 seconds, the GX-Force automatically returns to Measuring Mode. If the pump is turned off using the setting, the screen PUMP.OFF...

  • Page 46: Led Flashlight (Light)

    (lower for oxygen), the peak reading is cleared, or the GX-Force is turned off. The lunch break feature enables the GX-Force to save peak readings when it is turned off so it can continue with the same peaks when it is turned on again. See page 90 for instructions to turn the...

  • Page 47: Stel Screen (Stel)

    GX-Force is turned off. is set to , the GX-Force remembers TWA readings when it is turned off so it can LUNCH continue them when it is turned on again. See page 90 for instructions to turn the lunch break...
  • Page 48 CH4 (methane) i-C4H10 (isobutane) H2 (hydrogen) CH3OH (methanol) C2H2 (acetylene) C2H4 (ethylene) C2H6 (ethane) C2H5OH (ethanol) C3H6 (propylene) C3H6O (acetone) C3H8 (propane) C4H6 (butyne) C5H10 (cyclopentane) C6H6 (benzene) n-C6H14 (hexane) C7H8 (toluene) 48 • Chapter 4: Display Mode GX-Force Operator’s Manual...
  • Page 49 2. Press AIR to enter the screen. The current gas flashes at the bottom of the screen. 7:49 HC GAS SELECt 3. Use AIR to scroll through the list of gases. GX-Force Operator’s Manual Chapter 4: Display Mode • 49...

  • Page 50: Turning The Pump Off (Pump.off)

    Turning the Pump Off (PUMP.OFF) WARNING: The GX-Force is not a gas monitoring device while the pump is off. screen only appears if in User Mode is set to (factory setting) and PUMP.OFF...

  • Page 51: Changing The User Id (User Id)

    (factory setting is ID DISP Use this screen to select a user ID from the 128 user IDs that are stored in the GX-Force’s memory. Before a user ID is selected on a brand new instrument, the user ID is “----------”. The factory-installed user IDs have a “...

  • Page 52: Changing The Station Id (Stn Id)

    DISP Use this screen to select a station ID from the 128 station IDs that are stored in the GX-Force’s memory. Before a station ID is selected on a brand new instrument, the station ID is “ ”. The factory-installed station IDs have a “...

  • Page 53: Last Successful Calibration Date (Cal Data)

    23 - CAL DATA CAL DATA 3. When you are done viewing the last calibration date for the sensors, press POWER MODE to return to the screen in Display Mode. CAL DATA GX-Force Operator’s Manual Chapter 4: Display Mode • 53...

  • Page 54: Last Successful Bump Test Date (Bmp.data)

    23 - 23 - BMP.DATA BMP.DATA 3. When you are done viewing the last bump test date for the sensors, press POWER MODE to return to the screen in Display Mode. BMP.DATA 54 • Chapter 4: Display Mode GX-Force Operator’s Manual...

  • Page 55: Viewing Snap Log Data (Rec.data)

    Display Mode. REC.DATA Date, Time, Temperature Screen (TEMP) screen shows the instrument’s date and time and the surrounding area’s temperature. TEMP 7:49 23 - 3.08 7:49 22°C GX-Force Operator’s Manual Chapter 4: Display Mode • 55...

  • Page 56: Viewing Alarm Settings Screen (Alarm - - P)

    3. Use AIR to scroll through the Warning, Alarm, Alarm H, STEL, and TWA settings. 7:49 %LEL 23.5 1200 7:49 100.0 %LEL ALARM H 40.0 2000 200.0 F.S. 7:49 7:49 %LEL STEL 19.5 WARNING 7:49 7:49 %LEL 18.0 30.0 ALARM 7:49 ESCAPE 56 • Chapter 4: Display Mode GX-Force Operator’s Manual...
  • Page 57 The buzzer will sound, the LEDs will flash, and the instrument will vibrate just as it would if the displayed condition was actually happening. 5. Press POWER MODE to return to the Alarm Points Screen. GX-Force Operator’s Manual Chapter 4: Display Mode • 57...

  • Page 58: Chapter 5: User Mode And Calibration

    Chapter 5: User Mode and Calibration Overview This section describes the GX-Force in User Mode. See Table 11 for a list of the items found in User Mode, the page that the menu item’s instructions can be found on, and a short description of the menu item.
  • Page 59 CANT USE: Cannot enter Measuring Mode until a successful cali- bration is performed. NONE: A screen indicates that calibration is due but warmup sequence continues. Return to the CAL SET menu item in User Mode. ESCAPE GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 59...
  • Page 60 Set alarm points for all channels (WARNING, ALARM, ALARM H, STEL, TWA) or reset all alarms to their default settings (DEF.ALMP). (page 87) ESCAPE Return to the ALARM--P menu item in User Mode. 60 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 61 ON (factory setting): LIST item appears in Display Mode. USER ID and STN ID screens appear if ID DISP in Maintenance Mode is also set to ON. The PUMP.OFF screen appears if POFF.DISP in Maintenance Mode is also set to ON. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 61...

  • Page 62: Tips For Using User Mode

    PASS - - W (page 96) OFF (factory setting): User Mode is not password-protected. ROM/SUM Displays the GX-Force’s sensor and main ROM/SUM numbers (page 97) START (page 97) Press POWER MODE to begin the warmup sequence and enter Measuring Mode.

  • Page 63: Entering User Mode

    WARNING: The GX-Force is not in operation as a gas detector while in User Mode. 1. Take the GX-Force to a non-hazardous location and turn it off if it is on. 2. Press and hold AIR, then press and hold POWER MODE. When the instrument beeps once, release the buttons.

  • Page 64: Performing A Bump Test (Bump)

    3. Install the demand flow regulator onto the calibration cylinder. 4. Connect the sample tubing to the demand flow regulator. 5. If used during normal operation, install the sample hose and probe onto the GX-Force inlet fitting. Make sure the probe’s two halves are tightened firmly together to avoid leaks that can affect the calibration.
  • Page 65 H response. 9. Make sure the GX-Force has been turned on for at least 45 seconds before continuing. 10. Connect the sample tubing from the demand flow regulator to either the GX-Force’s inlet fitting or the rigid tube on the probe (if in use) then quickly press POWER MODE to begin the bump test countdown.
  • Page 66 Assigned? Auto start after successful cal set to on? (default is on) *NOTE: Auto start after successful cal parameter set using the GX-Force Datalogger Management Program. Figure 6: Bump Test Flow Chart 66 • Chapter 5: User Mode and Calibration...
  • Page 67 POWER MODE to go to the START item in the BUMP menu. 7. Disconnect the tubing from the probe. 8. Unscrew the regulator. 9. Press POWER MODE to enter Measuring Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 67...
  • Page 68 11.9 5. Use AIR to scroll to START and 7:49 Press POWER MODE to enter %LEL 11.9 Measuring Mode. BMP/ 6. Calibrate the GX-Force as soon as possible. BMP/ 7:49 %LEL 7:49 %LEL /CAL 4. Disconnect the tubing from the probe.
  • Page 69 6. Press POWER MODE to enter 6. Press POWER MODE to return to the Measuring Mode. START item in the BUMP menu. 7. Press POWER MODE to enter Measuring Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 69...

  • Page 70: Performing A Calibration (Gas Cal)

    4. Press POWER MODE to enter the menu. AIR CAL 7:49 %LEL 20.9 AIR CAL 5. Make sure the GX-Force has been turned on for at least 45 seconds before continuing. 70 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 71 3. Install the demand flow regulator onto the 3-gas or 4-gas calibration cylinder. 4. Connect the sample tubing to the demand flow regulator. 5. If used during normal operation, install the sample hose and probe onto the GX-Force inlet fitting.

  • Page 72: Performing A Span Adjustment

    -compensated CO sensor is installed, H is assigned to Cylinder D. 6. Make sure the GX-Force has been turned on for at least 45 seconds before continuing. 7. Connect the tubing from the demand flow regulator to either the GX-Force’s inlet fitting or the rigid tube on the probe (if in use) then quickly press POWER MODE to begin the span adjustment countdown.
  • Page 73 Assigned? Auto start after successful cal set to on? (default is on) *NOTE: Auto start after successful cal parameter set using the GX-Force Datalogger Management Program. Figure 7: Calibration Flow Chart GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 73...
  • Page 74 10. After the last cylinder is calibrated, the instrument continues to the START item in the AUTO.CAL menu. 11. Disconnect the tubing from the probe. 12. Unscrew the regulator. 13. Press POWER MODE to enter Measuring Mode. 74 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 75 5. Disconnect the tubing from the probe. 6. Unscrew the regulator. 7. The instrument continues to the START item in the AUTO.CAL menu. 8. Press POWER MODE to enter Measuring Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 75...
  • Page 76 5. Use AIR to scroll to CAL - - P 7:49 CAL - - P 6. Press POWER MODE. The combustible gas channel appears. 7:49 %LEL - - - CAL - - P 76 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 77 CAL - - P 7:49 ESCAPE 8. Press POWER MODE. The calibration value begins to flash. In the example below, the combustible gas channel is selected. 7:49 %LEL CAL - - P GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 77...
  • Page 78 15. Press POWER MODE. The instrument returns to the menu item in the AUTO.CAL GAS CAL Menu. 16. See “Exiting the GAS CAL Menu” on page 81 to return to User Mode. 78 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 79 4. Press POWER MODE. The Auto Cal screen for gases assigned to Cylinder A displays. 5. Use AIR to scroll to CYL SEL 7:49 CYL SEL 6. Press POWER MODE. The combustible gas channel displays. 7:49 %LEL - - - CYL SEL GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 79...
  • Page 80 12. Use AIR to scroll to ESCAPE 13. Press POWER MODE. The instrument returns to the menu item in the Auto Cal CYL SEL Menu. 14. Press AIR to scroll to ESCAPE 80 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...

  • Page 81: Setting Calibration Parameters (Cal Set)

    CAL.RMDR 7:49 CAL.RMDR CAL.RMDR (factory setting): The GX-Force gives an indication at start up if it is due for calibration. The type of indication depends on the setting (see page 82). CAL.EXPD : The GX-Force does not give an indication at start up if it is due for calibration.
  • Page 82 CONFIRM due. Press AIR to continue without calibrating or press POWER MODE to perform a calibration. : The GX-Force gives an indication at start up if calibration is past due. Press POWER CANT USE MODE to enter User Mode and perform a calibration. Pressing AIR has no effect. A successful calibration must be performed in order to use the instrument.

  • Page 83: Setting Bump Test Parameters (Bump.set)

    SETTING GAS.TIME CHECK CAL.TIME AUTO.CAL ESCAPE 1. After entering the BUMP.SET menu, press AIR to scroll to SETTING 7:49 SETTING 2. Press POWER MODE. The menu item appears. GAS.TIME GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 83...
  • Page 84 5. See “Exiting the SETTING Menu” on page 85 to return to the menu. BUMP.SET 6. See “Exiting the BUMP.SET Menu” on page 87 to return to User Mode. 84 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 85 90 seconds and the is set to 30 seconds, if the CAL.TIME GAS.TIME bump test fails, the GX-Force will only be exposed to gas for an additional 60 seconds. The available values are seconds (factory setting), and seconds.
  • Page 86 BMP.RMDR : The GX-Force gives an indication at start up if it is due for bump testing. The type of indication depends on the setting (see page 87). BMP.EXPD (factory setting): The GX-Force does not give an indication at start up if it is due for bump testing.

  • Page 87: Alarm Settings (Alarm--P)

    POWER MODE to enter User Mode and perform a bump test. Pressing AIR has no effect. A successful bump test must be performed in order to use the instrument. : The GX-Force gives an indication at startup if a bump test is past due. If desired, press NONE POWER MODE to perform a bump test but it is not necessary to acknowledge the bump test due indication.
  • Page 88 7:49 7:49 - - - %LEL - - - ALARM--P ALARM--P 7:49 7:49 - - - - - - ALARM--P ALARM--P 7:49 ESCAPE 2. Press POWER MODE. 88 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 89 7. The instrument returns to the channel selection screen. 8. Repeat Step 1 - Step 7 to change the alarm points for other channels. 9. See “ESCAPE” on page 90 to return to User Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 89...

  • Page 90: Updating The Lunch Break Setting (Lunch)

    TWA and PEAK readings and the time in operation from the last time the GX-Force was used or start collecting new readings and reset the time in operation. 1. While in User Mode, press AIR to scroll to...

  • Page 91: Setting The Confirmation Beep And Non-Compliance Indicator (Beep)

    : The GX-Force’s buzzer double beeps as often as defined by the BUZZER BEEP.INT parameter to verify that the instrument is operating. • : The GX-Force’s LEDs double flash and the buzzer double beeps as often as LED+BUZZ defined by the parameter to verify that the instrument is operating. BEEP.INT •...
  • Page 92 3. Use AIR to display the desired setting. 4. Press POWER MODE to save the setting and return to the menu item. BEEP.INT 5. See “ESCAPE” on page 93 to return to User Mode. 92 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...

  • Page 93: Updating The Backlight Time (Bl Time)

    3. Use AIR to display the desired setting. 4. Press POWER MODE to save the setting and return to the menu item. KEY.TONE 5. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 93...

  • Page 94: Display Mode Items (Disp.set)

    ZERO.SUP NOTE: Regardless of this parameter’s setting, Leak Check Mode does not support zero suppression. Zero Suppression Sensor Value Combustible Gas 2% LEL 0.5% volume 0.3 ppm 2 ppm 94 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...

  • Page 95: Zero Follower (Zero.flw)

    5. Repeat Step 3 and Step 4 to enter the month, day, hours, and minutes settings. The date and time are saved and the instrument returns to the menu item. DATE 6. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 95...

  • Page 96: Turning The Password On/Off (Pass - - W)

    Turning the Password On/Off (PASS - - W) : The GX-Force prompts you for a password when you enter User Mode. The factory-set password is but it can be changed as desired. 0000 (factory setting): No password is required to enter User Mode.

  • Page 97: Viewing The Rom/Sum (Rom/Sum)

    4. See “Entering Measuring Mode (START)” on page 97 to enter Measuring Mode. Entering Measuring Mode (START) 1. While in User Mode, press AIR to scroll to START 7:49 START 2. Press POWER MODE. The instrument begins its warmup sequence. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 97...

  • Page 98: Chapter 6: Maintenance

    Chapter 6: Maintenance Overview This chapter describes troubleshooting procedures for the GX-Force. It also includes procedures for instrument cleaning, recharging the batteries, and replacing various consumable parts. WARNING: RKI Instruments, Inc. recommends that service, calibration, and repair of RKI instruments be performed by personnel properly trained for this work. Replacing sensors and other parts with original equipment does not affect the intrinsic safety of the instrument.

  • Page 99: Instrument Cleaning

    Instrument Cleaning Clean the GX-Force with a cloth dampened with water if it becomes excessively dirty. Do not use alcohol or other cleaning solvents. Recharging the Lithium Ion Battery Pack CAUTION: To be used only with lithium ion battery pack p/n 49-1633. Charge only with RKI charger 49-0139 or 49-2022.

  • Page 100: Replacing The Sensor Filters

    For users with a 2 ppm or higher H S alarm setpoint, the filter does not necessarily ever need to be replaced. Replacement Procedure 1. Verify that the GX-Force is off. 100 • Chapter 6: Maintenance GX-Force Operator’s Manual...
  • Page 101 2. Turn the GX-Force over so that the LCD is facing down.Use a small Phillips screwdriver to unscrew the four screws holding the back case to the front case of the GX-Force. 3. With the front of the GX-Force facing down, gently pry apart the front and back portions of the case.
  • Page 102 Black and white combo filter for CO/H S dual sensor: The red side of the filter case should face toward the GX-Force. The black filter material should face the edge of the GX-Force while the white filter material should face the H S scrubber disk.

  • Page 103: Replacing The Inlet Filters

    Disk 1. Verify that the GX-Force is off. 2. Locate the clear plastic filter holder at the top of the GX-Force. 3. Grasp the filter holder and turn it 1/4 turn counterclockwise. 4. Pull the filter holder away from the case.
  • Page 104 8. Reinstall the filter holder. Align the two wide tabs on the bottom of the filter holder with the two wide slots in the case where the filter holder fits. Push the filter holder into the case and turn it 1/4 turn clockwise until it snaps into place. 104 • Chapter 6: Maintenance GX-Force Operator’s Manual...

  • Page 105: Replacing The Probe Filters

    Replacing the Probe’s Particle Filter and Hydrophobic Filter Disk Inspect the probe’s internal components if you notice that the GX-Force’s pump sounds bogged down or if an unexplained low flow alarm occurs. Replace the particle filter and hydrophobic filter disk if they appear dirty or saturated with liquid. Replace the gasket in the probe if it appears damaged.

  • Page 106: Replacing A Sensor

    Force’s case. 4. Gently pry apart the back case from the front. 5. Remove the filter gasket/sensor retainer assembly from the GX-Force. The sensors will be exposed. 6. Locate the sensor you want to replace and remove it from its socket.
  • Page 107 8. Reinstall the filter gasket/sensor retainer assembly. The black and white filter goes over the CO/H S sensor with the black half of the filter facing the edge of the GX-Force. Be sure the filter gasket/sensor retainer is oriented correctly.

  • Page 108: Chapter 7: Storage And Disposal

    • Discharge the battery to 1 bar in the battery icon to help prolong battery life and prevent battery deterioration. • The GX-Force draws a small amount of power even while it is shut off. A GX-Force with a full battery can be stored for 3 years without losing power. A GX-Force with a battery in low battery alarm can be stored for about 3 months without losing power.

  • Page 109: Chapter 8: General Parts List

    71-0627 GX-Force Datalogging Management Program Operator’s Manual 80-0009RK-10 Sample hose, 5 foot hose is standard, available lengths for the GX-Force are 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, and 100 feet 80-0172 Probe, with hydrophobic filter and particle filter, no scrubber section...
  • Page 110 ESR-A13P-CO Carbon monoxide (CO) sensor ESR-A1CP-CO-H Hydrogen-compensated carbon monoxide (CO) sensor ESR-A1DP-COHS Dual carbon monoxide (CO) and hydrogen sulfide (H S) sensor ESR-X13P-OXY Oxygen sensor NCR-6309 Combustible gas sensor, catalytic 110 • Chapter 8: General Parts List GX-Force Operator’s Manual...

  • Page 111: Appendix A: Maintenance Mode

    Appendix A: Maintenance Mode Overview This appendix describes the GX-Force in Maintenance Mode. The GX-Force is factory-set to suit most applications. Update settings in Maintenance Mode only if required for your specific application. Maintenance Mode items and their factory settings are listed in Table 17.
  • Page 112 OFF: You cannot manually perform a fresh air adjust in Measuring Mode by pressing AIR. A.ZERO (page ON: The GX-Force asks if you want to perform a fresh air adjustment at the end of the 119) startup sequence. OFF (factory setting): The GX-Force does not ask if you want to perform a fresh air adjustment at the end of the startup sequence.

  • Page 113: Tips For Using Maintenance Mode

    Immediately press POWER MODE and then release both buttons. • To exit an entered menu item without saving a change, press and hold AIR and POWER MODE for a few seconds. GX-Force Operator’s Manual Appendix A: Maintenance Mode • 113...

  • Page 114: Entering Maintenance Mode

    WARNING: The GX-Force is not in operation as a gas detector while in Maintenance Mode. 1. Take the GX-Force to a non-hazardous location and turn it off if it is on. 2. Press and hold AIR, then press and hold POWER MODE. You will hear a beep after one second.

  • Page 115: Performing A Calibration (Gas Cal)

    1. Install the demand flow regulator onto the calibration cylinder. 2. Connect the sample tubing to the demand flow regulator. 3. If used during normal operation, install the sample hose and probe onto the GX-Force inlet fitting. Make sure the probe’s two halves are tightened firmly together to avoid leaks that can affect the calibration.

  • Page 116: Sensor/Battery Replacement Date (Sen.date)

    GAS.TEST condition. 9. Unscrew the regulator from the calibration cylinder. 10. Disconnect the tubing from the gas inlet on the GX-Force. 11. Store the calibration kit in a safe and convenient place. 12. Press POWER MODE to return to the menu item in Maintenance Mode.

  • Page 117: Performing A Bump Test (Bump)

    7. See “Entering Measuring Mode (START)” on page 125 to enter Measuring Mode. Performing a Bump Test (BUMP) See “Performing a Bump Test (BUMP)” on page 64 for a description of the menu item. BUMP GX-Force Operator’s Manual Appendix A: Maintenance Mode • 117...

  • Page 118: Setting Alarms To Latching Or Self-Resetting (Latch)

    Setting Alarms to Latching or Self-Resetting (LATCH) (factory setting): The GX-Force remains in alarm until the alarm condition passes and POWER MODE is pressed. : The GX-Force automatically resets an alarm when the alarm condition passes. 1. While in Maintenance Mode, press AIR to scroll to...

  • Page 119: Turning The Alarm Silence Function On/Off (Alm.snc)

    5. See “Entering Measuring Mode (START)” on page 125 to enter Measuring Mode. Turning the Auto Zero Function On/Off (A.ZERO) : The GX-Force asks if you want to perform a fresh air adjustment at the end of the startup sequence.

  • Page 120: Turning The Id Display Function On/Off (Id Disp)

    The default setting for each sensor is ZERO.SUP NOTE: Regardless of this parameter’s setting, Leak Check Mode does not support zero suppression. Sensor Zero Suppression Value Combustible Gas 2% LEL 0.5% volume 0.3 ppm 2 ppm 120 • Appendix A: Maintenance Mode GX-Force Operator’s Manual...

  • Page 121: Turning The Zero Follower On/Off (Zero.flw)

    (factory setting is ) for the item to appear. PUMP.OFF WARNING: The GX-Force is not a gas monitoring device if the pump is turned off. Setting the Date/Time (DATE) 1. While in User Mode, press AIR to scroll to DATE...

  • Page 122: Turning The Password On/Off (Pass - - W)

    6. See “Entering Measuring Mode (START)” on page 125 to enter Measuring Mode. Turning the Password On/Off (PASS - - W) (factory setting): The GX-Force prompts you for a password when you enter Maintenance Mode. The factory-set password is , but it can be changed if desired.

  • Page 123: Viewing The Rom/Sum (Rom/Sum)

    4. See “Entering Measuring Mode (START)” on page 125 to enter Measuring Mode. Performing a Flow Pump Adjustment (FLOW.ADJ) This menu item is not intended for field use and does not affect the instrument. The GX-Force’s low flow tolerance is factory adjusted so that a low flow setpoint adjustment is not necessary.

  • Page 124: Performing A Default (M.default)

    Performing a Default (M.DEF) Performing a default operation in Maintenance Mode returns all parameters to their RKI factory settings. 1. While in Maintenance Mode, press AIR to scroll to M.DEF 7:49 M.DEF 2. Press POWER MODE to continue. Press AIR to return to the menu item in M.DEF...

  • Page 125: Entering Measuring Mode (Start)

    Entering Measuring Mode (START) 1. While in Maintenance Mode, press AIR to scroll to START 7:49 START 2. Press POWER MODE. The instrument begins its warmup sequence. GX-Force Operator’s Manual Appendix A: Maintenance Mode • 125...

  • Page 126: Appendix B: Gas Select Mode

    Appendix B: Gas Select Mode Overview This appendix describes the GX-Force in Gas Select Mode. The GX-Force is factory-set to suit most applications. Update settings in Gas Select Mode only if required for your specific application. A description of the Gas Select Mode items is shown in Table 18.

  • Page 127: Entering Gas Select Mode

    MODE for a few seconds. Entering Gas Select Mode WARNING: The GX-Force is not in operation as a gas detector while in Gas Select Mode. 1. Take the GX-Force to a non-hazardous location and turn it off if it is on.

  • Page 128: Changing The Gas Combination (Gas.comb)

    User Mode (see page 70). 1. While in Gas Select Mode, press AIR to scroll to GAS.COMB 7:49 GAS.COMB 2. Press POWER MODE. The first channel displays. 7:49 %LEL - - - GAS.COMB 128 • Appendix B: Gas Select Mode GX-Force Operator’s Manual...
  • Page 129 - - - GAS.COMB GAS.COMB 7:49 ESCAPE 4. Press POWER MODE. 5. The target gas for the selected channel flashes. In the example below, the combustible gas channel is selected. 7:49 SELECt GX-Force Operator’s Manual Appendix B: Gas Select Mode • 129...
  • Page 130 (off) If CH4_VOL is selected, the CHG LEL item in Gas Select Mode has no effect on operation. ** Although HCN is in the list of CO channel options, the GX-Force does not support this target gas. 7. Press POWER MODE to save the setting.

  • Page 131: Saving The Alarm Points (Save-Ap)

    Maintenance Mode. An SAVE -- AP M.DEF M.DEF operation returns all instrument settings to the RKI default regardless of if a SAVE -- AP operation was performed. 1. While in Gas Select Mode, press AIR to scroll to SAVE -- AP...

  • Page 132: Turning Calibration Max Span On/Off (Max.span)

    Turning Calibration Max Span On/Off (MAX.SPAN) : After a passed calibration, the GX-Force displays the maximum possible adjustment it could have made to the response reading. If the combustible gas channel was calibrated with 50% LEL gas and the maximum indicated span is 95% LEL, this means that there was enough adjustment left on that channel to set the reading to 95% LEL when the detector was exposed to 50% LEL gas.

  • Page 133: Lel Definition (Chg Lel)

    : Apply the ISO settings (per ISO 10156 2017) for the lower explosive limit’s ppm level. Standard (ppm) IEC (ppm) ISO (ppm) Methane (CH4) 50,000 44,000 44,000 Isobutane (i-C4H10) 18,000 13,000 15,000 Hydrogen (H2) 40,000 40,000 40,000 Methanol (CH3OH) 55,000 60,000 60,000 GX-Force Operator’s Manual Appendix B: Gas Select Mode • 133...
  • Page 134 Dimethyl ether (DME) 30,000 27,000 27,000 Methyl isobutyl ketone 12,000 12,000 12,000* (MIBK) Tetrahydrofuran (THK) 20,000 15,000 15,000* * Values are actually IEC because no ISO definition exists for these gases. 134 • Appendix B: Gas Select Mode GX-Force Operator’s Manual...

  • Page 135: Exiting Gas Select Mode (Start)

    5. See “Exiting Gas Select Mode (START)” on page 135 to enter Measuring Mode. Exiting Gas Select Mode (START) 1. While in Gas Select Mode, press AIR to scroll to START 7:49 START 2. Press POWER MODE. The instrument begins its warm-up sequence. GX-Force Operator’s Manual Appendix B: Gas Select Mode • 135...

  • Page 136: Appendix C: Leak Check Mode

    Mode. The instrument must be in Normal Mode to detect VOC gases. Start Up, Leak Check Mode This section explains how to start up the GX-Force in Leak Check Mode and get it ready for operation. NOTE: Leak Check Mode is only supported for methane ( ) and isobutane ( ).
  • Page 137 NOTE: If no button is pressed for 20 seconds, the unit will proceed into whichever mode option is displayed. 5. See “Turning On the GX-Force” on page 21 for a description of the remainder of the warm-up sequence keeping the following in mind: a.
  • Page 138 6. The GX-Force is now monitoring for gas in Leak Check Mode. The pump is on and the active channels are displayed. If the instrument detects a reading that exceeds 5000 ppm, the displayed unit of measurement will switch from ppm to %LEL.

  • Page 139: Leak Check Mode Operation

    Setting the Display Range Value The GX-Force’s Leak Check Mode has 4 display range ppm values to choose from: 500 ppm, 1000 ppm, 2000 ppm, and 5000 ppm (factory setting). NOTE: The GX-Force is always detecting combustible gas up to 5000 ppm. The display range value is only adjusting what part of the detection range is displayed on the LCD.
  • Page 140 GX-Force Setup Leak Check Buzzer Program. See page 148 for the GX-Force Setup Program setup instructions and steps to adjust Leak Check Mode parameters. When the Leak Check Buzzer parameter is enabled, the alarm buzzer can be turned off and on in Leak Check Mode.

  • Page 141: Locating A Leak

    Locating a Leak 1. Start up the GX-Force as described above in “Turning On the GX-Force, Leak Check Mode” on page 136. 2. Move the probe tip or tapered nozzle tip back and forth along the area of a suspected leak.

  • Page 142: Snap Log Mode, Leak Check Mode Operation

    To enter Snap Log Mode and record snap log data: 1. Turn the GX-Force on as described in “Turning On the GX-Force, Leak Check Mode” on page 136. 2. Select the desired display range. In the example below, 5000 ppm has been selected.
  • Page 143 Leak Check Display Contents CO/O2, only the LEL channel will display a reading in the snap log screen on both the instrument and in the GX-Force Datalogging Program (page 148). 10. Take the instrument to the monitoring area. The instrument will retain and display the highest gas concentration encountered.

  • Page 144: Display Mode, Leak Check Mode Operation

    GX-Force’s LED flashlight on and off. LIGHT 1. Turn the GX-Force on as described in “Turning On the GX-Force, Leak Check Mode” on page 136. Select the desired display range. 2. While in Leak Check Mode, press POWER MODE once. The menu item appears.

  • Page 145: Viewing Snap Log Data In Leak Check Mode Operation

    To clear the peak readings, do the following: 1. Turn the GX-Force on as described in “Turning On the GX-Force, Leak Check Mode” on page 136. Select the desired display range. 2. While in Leak Check Mode, press POWER MODE until appears.
  • Page 146 NOTE: Snap log data only saves and displays the LEL channel on the instrument and in the GX-Force Datalogging Program, even if the Leak Check Display parameter is set to LEL/CO, LEL/O2, or LEL/CO/O2 (see page Contents 152).
  • Page 147 NOTE: Pressing POWER MODE and AIR at the same time reverses the scroll direction when viewing snap logs. Turning Off the GX-Force, Leak Check Mode 1. Press and hold the POWER MODE button. 2. TURN OFF will appear on the display and the buzzer will pulse for about five seconds.

  • Page 148: Adjusting Leak Check Settings (Gx-Force Setup Program)

    Adjusting Leak Check Settings (GX-Force Setup Program) This section explains how to use the GX-Force Setup Program to adjust Leak Check Mode parameters. See Table 20 for Leak Check Mode parameter descriptions. CAUTION: Only make changes to instrument parameters that are required for a given application.
  • Page 149 Both the instrument screen and status area in the Setup Program will update accordingly. 7:49 TRANS Figure 13: Connection Status Screens 10. The instrument’s parameters can now be adjusted with the GX-Force Setup Program. GX-Force Operator’s Manual Appendix C: Leak Check Mode • 149...
  • Page 150 Adjusting Leak Check Mode Settings 1. After following the setup procedure from the previous section, click on the “Instrument Information” button in the GX-Force Setup Program. 2. A pop-up appears, indicating that the instrument’s parameter data is being downloaded to the GX-Force Setup Program.
  • Page 151 CAUTION: Only make changes to instrument parameters that are required for a given application. Unneeded parameter adjustments may result in improper or unexpected operation of the instrument. Figure 14: Detail Settings Maintenance Tab GX-Force Operator’s Manual Appendix C: Leak Check Mode • 151...
  • Page 152 Check Display Contents The GX-Force can have Leak Check Mode already enabled upon request so that Mode Select screen is displayed when the unit is turned on. 5. To confirm all adjustments made to the parameters, press “OK” in the Parameter window.

  • Page 153: Appendix D: Interference Information

    0.45 vol% 0.0 ppm Isobuten 1000 ppm 0.1 ppm Isopropyl Alcohol 2.0 vol% -0.5 ppm Methane 1.26 vol% 0.0 ppm Methanol 1.38 vol% -0.6 ppm Methyl Ethyl Ketone 0.45 vol% 0.0 ppm GX-Force Operator’s Manual Appendix D: Interference Information • 153...
  • Page 154 Sulfur Dioxide 25.0 ppm 0.0 ppm Tetrahydrofuran 0.50 vol% -0.4 ppm Toluene 1.0 vol% 0.0 ppm Xylene 0.25 vol% 0.0 pm The indicated value may fluctuate when exposed to this gas. 154 • Appendix D: Interference Information GX-Force Operator’s Manual...

  • Page 155: Esr-A13P-Co, Co Detection

    -1 ppm Isobuten C=CH 1000 ppm 2 ppm Isopropyl Alcohol CHOH 0.5 vol% -1 ppm Methane 1.25 vol% 0 ppm Methanol 1000 ppm 3 ppm Methyl Ethyl Ketone 0.45 vol% -1 ppm GX-Force Operator’s Manual Appendix D: Interference Information • 155...
  • Page 156 Sulfur Dioxide 30 ppm 0 ppm Tetrahydrofuran 0.5 vol% 0 ppm Toluene 3000 ppm 0 ppm Xylene 2500 ppm 0 ppm The indicated value may fluctuate when exposed to this gas. 156 • Appendix D: Interference Information GX-Force Operator’s Manual...

  • Page 157: Compensated Co Detection

    53 ppm Nitrogen Dioxide 50.5 ppm 0 ppm Methane 1.26 vol% 1 ppm Methanol 1.38 vol% 131 ppm Methyl Ethyl Ketone 0.45 vol% 0 ppm Methyl Isobutyl Ketone 0.30 vol% 0 ppm GX-Force Operator’s Manual Appendix D: Interference Information • 157...
  • Page 158 Sulfur Dioxide 25.0 ppm 1 ppm Tetrahydrofuran 0.50 vol% 1 ppm Toluene 0.30 vol% 1 ppm Xylene 0.25 vol% 0 ppm The indicated value may fluctuate when exposed to this gas. 158 • Appendix D: Interference Information GX-Force Operator’s Manual...

  • Page 159: Esr-A1Dp-Cohs, Co Detection

    30 ppm 2 ppm Isobutane 0.45 vol% 0 ppm Isobuten C=CH 1000 ppm 9 ppm Isopropyl Alcohol CHOH 0.5 vol% 15 ppm Methane 1.25 vol% -1 ppm Methanol 1000 ppm 10 ppm GX-Force Operator’s Manual Appendix D: Interference Information • 159...
  • Page 160 Sulfur Dioxide 30 ppm 3 ppm Tetrahydrofuran 0.5 vol% 21 ppm Toluene 0.3 vol% 0 ppm Xylene 0.25 vol% 0 ppm The indicated value may fluctuate when exposed to this gas. 160 • Appendix D: Interference Information GX-Force Operator’s Manual...

  • Page 161: Esr-A1Dp-Cohs, H

    0.0 ppm Hydrogen Selenide 1 ppm 0.3 ppm Isobutane 0.45 vol% -0.1 ppm Isobuten CH(CH 1000 ppm 0.1 ppm Isopropyl Alcohol C(OH)CH 0.5 vol% 0.0 ppm Methane 1.25 vol% -0.1 ppm GX-Force Operator’s Manual Appendix D: Interference Information • 161...
  • Page 162 Propylene 0.5 vol% -0.1 ppm Silane 29.9 ppm 0.6 ppm Sulfur Dioxide 30 ppm -0.1 ppm Tetrahydrofuran 0.5 vol% 0.1 ppm Toluene 0.3 vol% -0.1 ppm Xylene 0.25 vol% -0.1 ppm 162 • Appendix D: Interference Information GX-Force Operator’s Manual...

  • Page 163: Product Warranty

    We do not assume indemnification for any accident or damage caused by the operation of this gas monitor and our warranty is limited to the replacement of parts or our complete goods. Warranty covers parts and labor performed at RKI Instruments, Inc. only, and does not cover field labor or shipment of parts back to RKI.

  • Page 164: Eu Declaration Of Conformity

    II 1 G Ex da ia IIC T4 Ga (with catalytic gas sensor) -20 II 1 G Ex ia IIC T4 Ga (without catalytic gas sensor) -20 Alternative Marking: Place: Tokyo, Japan Date: May. 24, 2024 Takakura Toshiyuki General manager Quality Control Center 164 • GX-Force Operator’s Manual...
  • Page 165 Observe the following points to ensure performance as an explosion-proof product: Overview GX-Force is a suction type portable gas monitor which can measure up to 4 gases using 3 sensors. GX-Force measure the combustible gases (LEL), oxygen (O2), hydrogen sulfide (H2S), and carbon monoxide (CO).
  • Page 166 Instruments No. INST. No. 0000 A: Year of manufacture (0 to 9) B: Month of manufacture (1 to 9 for Jan.-Sep.; XYZ for Oct., Nov., Dec.) C: Manufacturing lot D: Serial number E: Factory codes 166 • GX-Force Operator’s Manual...

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