RKI Instruments GX-Force Operator's Manual
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RKI Instruments GX-Force Operator's Manual

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GX-Force
Operator's Manual
Part Number: 71-0626
Revision: P1
Released: 6/20/23
RKI Instruments, Inc.
www.rkiinstruments.com

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  • Page 1 GX-Force Operator’s Manual Part Number: 71-0626 Revision: P1 Released: 6/20/23 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: Table Of Contents

    About the GX-Force ........
  • Page 4 Turning On the GX-Force ........
  • Page 5 Replacing a Sensor ............103 GX-Force Operator’s Manual • 5...
  • Page 6 Saving the Alarm Points (SAVE-AP) ......... . 127 6 • GX-Force Operator’s Manual...
  • Page 7 Warranty ............142 WARNING: Understand manual before operating. Substitution of components may impair intrinsic safety. To prevent ignition of a hazardous atmosphere, batteries must only be changed or charged in an area known to be nonhazardous. GX-Force Operator’s Manual • 7...

  • Page 8: Chapter 1: Introduction

    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 at the end of this chapter lists the specifications for the GX-Force. About the GX-Force...

  • Page 9: Specifications

    TWA Setpoint 1.0 ppm 25 ppm 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. Table 2: GX-Force Specifications Sampling...
  • Page 10 Table 2: GX-Force Specifications • ATEX: Certificate Number: DNV 22 ATEX 05201X II1G Ex da ia IIC T4 Ga (with NCR-6309) II1G Ex ia IIC T4 Ga (without NCR-6309) • IECEx: Certificate Number: IECEx DNV 22.0029X Ex da ia IIC T4 Ga (with NCR-6309)

  • Page 11: About This Manual

    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. WARNING: Describes potential danger that can result in injury or death. GX-Force Operator’s Manual...

  • Page 12: 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 13: 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 14: 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 15: Filters

    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 16: Usb Type-C Charging Data Port

    USB Type-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 17: Included Accessories

    Battery Pack A lithium ion (Li-ion) battery pack powers the GX-Force. At 25°C, the battery lasts at least 30 hours. The battery icon in the lower left corner of the LCD shows remaining battery life. A low battery warning activates when the GX-Force detects a low battery voltage. The GX-Force sounds a dead battery alarm when battery voltage is too low for Measuring Mode.

  • Page 18: Optional Accessories

    Sample hose lengths are available from 3 feet to 100 feet (see “Chapter 8: General Parts List” on page 106). 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 19: External Dilution Fitting

    External Dilution Fitting A 1:1 external dilution fitting is available for the GX-Force. It is designed to mate with the inlet fitting and accept a sample hose and probe. The fitting is made with brass and nickel plated brass and is appropriate for use with the four standard gases. The fitting is normally used when it is necessary to introduce air into a sample that has no oxygen or a very low level of oxygen, such as a nitrogen-purged sample.

  • Page 20: 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 21 Buzzer sounds double pulsing Buzzer sounds double pulsing None tone tone • Option A, Perform • The GX-Force cannot be • Option A, Perform Action calibration: Press POWER used until a successful calibration: To perform a MODE to perform a calibration is performed.
  • Page 22 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 23 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 24 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 24 • Chapter 3: Operation GX-Force Operator’s Manual...
  • Page 25 USEr Id U_ID_001 S_ID_001 11. 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 26: 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 27: 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 28: 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 29: Monitoring An Area

    Monitoring an Area 1. Start up the GX-Force as described above in “Start Up” on page 20. 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 30 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 31: 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%. GX-Force Operator’s Manual Chapter 3: Operation • 31...

  • Page 32: 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 33 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 34 • FAIL appears in the middle of the Flow Failure Double pulsing tone once screen and FLOW appears at the per second bottom of the screen. • Alarm LEDs flash once per second 34 • Chapter 3: Operation GX-Force Operator’s Manual...

  • Page 35: Responding To Alarms

    Reset or silence the alarm as necessary or allowed. Alarm silence can be turned on or off using the menu item in Maintenance Mode (see page 115) or the GX-Force ALM.SLNC Data Logger Management Program (see the GX-Force Data Logger Management Program Operator’s Manual).Table 6 summarizes resetting and silencing alarms for all...
  • Page 36 Responding to Over Range Alarms WARNING: An over range condition may indicate an extreme combustible gas, toxic gas, or oxygen concentration. Confirm the gas concentration with a different GX-Force or with another gas detecting device. CAUTION: High off-scale readings may indicate an explosive concentration.
  • Page 37 “Recharging the Lithium Ion Battery Pack” on page 97. 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 38 2. Attempt to set the date using the menu item in User Mode. See page 93. DATE 3. If the date cannot be set correctly, contact RKI Instruments, Inc. as soon as possible. 38 • Chapter 3: Operation GX-Force Operator’s Manual...
  • Page 39 2. Inspect the internal pump’s dust filter and the probe’s dust filter and replace them if either is clogged or saturated by liquid (see page 100 and page 102). 3. If the low flow alarm persists after filter replacement, contact RKI Instruments, Inc. to schedule a repair.
  • Page 40 If the error code is 031, you may press POWER MODE to continue into Measuring Mode if the instrument must be used temporarily. CAUTION: There will be no data logging function if you operate the instrument after a 031 system failure. Contact RKI Instruments, Inc. as soon as possible. 40 • Chapter 3: Operation...

  • Page 41: 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 42: 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 43: Chapter 4: Display Mode

    (page 50) 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). GX-Force Operator’s Manual Chapter 4: Display Mode • 43...

  • Page 44: Tips For Using Display Mode

    • To exit Display Mode and return to Measuring Mode, press and hold both AIR and POWER MODE together. NOTE: Each screen displays for 20 seconds. If no button is pressed within 20 seconds, the GX- Force automatically returns to Measuring Mode. 44 • Chapter 4: Display Mode GX-Force Operator’s Manual...

  • Page 45: 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 88 for instructions to turn the...

  • Page 46: 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 88 for instructions to turn the lunch break...
  • Page 47 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) GX-Force Operator’s Manual Chapter 4: Display Mode • 47...
  • Page 48 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. 48 • Chapter 4: Display Mode GX-Force Operator’s Manual...

  • Page 49: 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 50: 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 51: 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 52: 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 52 • Chapter 4: Display Mode GX-Force Operator’s Manual...

  • Page 53: 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 GX-Force Operator’s Manual Chapter 4: Display Mode • 53...

  • Page 54: 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 54 • Chapter 4: Display Mode GX-Force Operator’s Manual...

  • Page 55: 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 GX-Force Operator’s Manual Chapter 4: Display Mode • 55...
  • Page 56 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. 56 • Chapter 4: Display Mode GX-Force Operator’s Manual...

  • Page 57: 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 58 OFF (factory setting): No notification upon startup when a bump test is due. BMP.INT How often the instrument needs to be bump tested. (page 84) Options: 0 - 30 days (factory setting is 30 days) 58 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 59 (page 90) Options: 0.5 minute and 1 to 99 minutes in 1 minute increments. The factory setting is 5 minutes. ESCAPE Return to the BEEP menu item in User Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 59...

  • Page 60: Tips For Using User Mode

    ON: User Mode is password-protected. Factory-set password is 0000. (page 93) OFF (factory setting): User Mode is not password-protected. ROM/SUM Displays the GX-Force’s sensor and main ROM/SUM numbers (page 94) START (page 95) Press POWER MODE to begin the warmup sequence and enter Measuring Mode.

  • Page 61: 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 62: 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 63 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 64 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 64 • Chapter 5: User Mode and Calibration...
  • Page 65 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 • 65...
  • Page 66 7:49 5. Use AIR to scroll to START and Press %LEL 11.9 POWER MODE to enter Measuring 7:49 Mode. %LEL 11.9 6. Calibrate the GX-Force as soon as BMP/ possible. BMP/ 7:49 %LEL 7:49 %LEL /CAL 4. Disconnect the tubing from the probe.
  • Page 67 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 • 67...

  • Page 68: 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. 68 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 69 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 70 -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 71 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 • 71...
  • Page 72 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. 72 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 73 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 • 73...
  • Page 74 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 74 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 75 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 • 75...
  • Page 76 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 79 to return to User Mode. 76 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 77 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 • 77...
  • Page 78 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 78 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...

  • Page 79: 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 80). CAL.EXPD : The GX-Force does not give an indication at start up if it is due for calibration.
  • Page 80 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 81: 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 • 81...
  • Page 82 5. See “Exiting the SETTING Menu” on page 83 to return to the menu. BUMP.SET 6. See “Exiting the BUMP.SET Menu” on page 85 to return to User Mode. 82 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 83 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 84 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 85). BMP.EXPD (factory setting): The GX-Force does not give an indication at start up if it is due for bump testing.

  • Page 85: 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 86 7:49 7:49 - - - %LEL - - - ALARM--P ALARM--P 7:49 7:49 - - - - - - ALARM--P ALARM--P 7:49 ESCAPE 2. Press POWER MODE. 86 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...
  • Page 87 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 88 to return to User Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 87...

  • Page 88: 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 89: 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 90 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 91 to return to User Mode. 90 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...

  • Page 91: 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 95 to enter Measuring Mode. GX-Force Operator’s Manual Chapter 5: User Mode and Calibration • 91...

  • Page 92: Display Mode Items (Disp.set)

    Maintenance Mode (factory setting is ZFLW.DISP setting is not intended for field adjustment. The default setting is . The ZERO.FLW oxygen channel does not support zero follower functionality. 92 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...

  • Page 93: Setting The Date/Time (Date)

    6. See “Entering Measuring Mode (START)” on page 95 to enter Measuring Mode. 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.

  • Page 94: Viewing The Rom/Sum (Rom/Sum)

    MAIN.ROM SENS.ROM 3. Press POWER MODE to return to the menu item in User Mode. ROM/SUM 4. See “Entering Measuring Mode (START)” on page 95 to enter Measuring Mode. 94 • Chapter 5: User Mode and Calibration GX-Force Operator’s Manual...

  • Page 95: Entering Measuring Mode (Start)

    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 • 95...

  • Page 96: 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 97: 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 98: 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. 98 • Chapter 6: Maintenance GX-Force Operator’s Manual...
  • Page 99 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 100: Replacing The Inlet Filters

    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 101 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. GX-Force Operator’s Manual Chapter 6: Maintenance • 101...

  • Page 102: 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 103: 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 104 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 105: Chapter 7: Storage

    • 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 106: 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 107 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 GX-Force Operator’s Manual Chapter 8: General Parts List • 107...

  • Page 108: 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 109 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 116) 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 110: 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. 110 • Appendix A: Maintenance Mode GX-Force Operator’s Manual...

  • Page 111: 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 112: 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 113: 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 114: Performing A Bump Test (Bump)

    7. See “Entering Measuring Mode (START)” on page 121 to enter Measuring Mode. Performing a Bump Test (BUMP) See “Performing a Bump Test (BUMP)” on page 62 for a description of the menu item. BUMP 114 • Appendix A: Maintenance Mode GX-Force Operator’s Manual...

  • Page 115: 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 116: Turning The Demand Zero Function On/Off (D.zero)

    5. See “Entering Measuring Mode (START)” on page 121 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 117: Turning The Id Display Function On/Off (Id Disp)

    0.3 ppm 2 ppm Turning the Zero Follower On/Off (ZERO.FLW) setting is not intended for field adjustment. The default setting is . The ZERO.FLW oxygen channel does not support zero follower functionality. GX-Force Operator’s Manual Appendix A: Maintenance Mode • 117...

  • Page 118: User Mode Zero Suppression (Zsup.disp)

    (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 119: Turning The Password On/Off (Pass - - W)

    6. See “Entering Measuring Mode (START)” on page 121 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 as desired.

  • Page 120: Viewing The Rom/Sum (Rom/Sum)

    4. See “Entering Measuring Mode (START)” on page 121 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 121: Entering Measuring Mode (Start)

    6. See “Entering Measuring Mode (START)” on page 121 to enter Measuring Mode. 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 • 121...

  • Page 122: 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 123: 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 124: Changing The Gas Combination (Gas.comb)

    User Mode (see page 68). 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 124 • Appendix B: Gas Select Mode GX-Force Operator’s Manual...
  • Page 125 - - - 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 • 125...
  • Page 126 (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 127: Saving The Alarm Points (Save-Ap)

    3. Press POWER MODE to save the current alarm point settings as the default. 4. The instrument returns to the menu item in Gas Select Mode. SAVE -- AP 5. See “Exiting Gas Select Mode (START)” on page 131 to enter Measuring Mode. GX-Force Operator’s Manual Appendix B: Gas Select Mode • 127...

  • Page 128: 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 129: 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 GX-Force Operator’s Manual Appendix B: Gas Select Mode • 129...
  • Page 130 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. 130 • Appendix B: Gas Select Mode GX-Force Operator’s Manual...

  • Page 131: Exiting Gas Select Mode (Start)

    5. See “Exiting Gas Select Mode (START)” on page 131 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 • 131...

  • Page 132: Appendix C: Interference Information

    C4H8 1000 ppm 0.1 ppm Isopropyl Alcohol C3H8O 2.0 vol% -0.5 ppm Methane 1.26 vol% 0.0 ppm Methanol CH3OH 1.38 vol% -0.6 ppm Methyl Ethyl Ketone C4H8O 0.45 vol% 0.0 ppm 132 • Appendix C: Interference Information GX-Force Operator’s Manual...
  • Page 133 25.0 ppm 0.0 ppm Tetrahydrofuran C4H8O 0.50 vol% -0.4 ppm Toluene C7H8 1.0 vol% 0.0 ppm Xylene C8H10 0.25 vol% 0.0 pm The indicated value may fluctuate when exposed to this gas. GX-Force Operator’s Manual Appendix C: Interference Information • 133...

  • Page 134: 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 134 • Appendix C: Interference Information GX-Force Operator’s Manual...
  • Page 135 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. GX-Force Operator’s Manual Appendix C: Interference Information • 135...

  • Page 136: Esr-A1Cp-Coh, H 2 -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 136 • Appendix C: Interference Information GX-Force Operator’s Manual...
  • Page 137 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. GX-Force Operator’s Manual Appendix C: Interference Information • 137...

  • Page 138: Esr-A1Dp-Cohs, Co Detection

    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 Methyl Ethyl Ketone 0.45 vol% -1 ppm 138 • Appendix C: Interference Information GX-Force Operator’s Manual...
  • Page 139 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. GX-Force Operator’s Manual Appendix C: Interference Information • 139...

  • Page 140: Esr-A1Dp-Cohs, H

    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 Methanol 1.375 vol% 0.5 ppm 140 • Appendix C: Interference Information GX-Force Operator’s Manual...
  • Page 141 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 GX-Force Operator’s Manual Appendix C: Interference Information • 141...

  • Page 142: 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.

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