RKI Instruments GX-3R Operator's Manual
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RKI Instruments GX-3R Operator's Manual

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GX-3R
Operator's Manual
Part Number: 71-0477
Revision: P8
Released: 2/27/20
www.rkiinstruments.com

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  • Page 1 GX-3R Operator’s Manual Part Number: 71-0477 Revision: P8 Released: 2/27/20 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. GX-3R Operator’s Manual...

  • Page 3: Table Of Contents

    Turning On the GX-3R ........
  • Page 4 Replacing the Hydrophobic Dust Filter ........84 GX-3R Operator’s Manual...
  • Page 5 S Detection......... 120 GX-3R Operator’s Manual...
  • Page 6 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. 6 • GX-3R Operator’s Manual...

  • Page 7: Chapter 1: Introduction

    GX-3R Operator’s Manual (this document). Table at the end of this chapter lists the specifications for the GX-3R. About the GX-3R Using an advanced detection system consisting of up to three gas sensors, the GX-3R personal four-gas monitor detects the presence of combustible gas, oxygen (O ), carbon monoxide (CO), and hydrogen sulfide (H S) simultaneously.

  • Page 8: Specifications

    TWA Alarm 1.0 ppm 25 ppm * The GX-3R 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-3R Specifications...
  • Page 9 Table 2: GX-3R Specifications Indication Oxygen Accuracy for • ± 3.0% O Service Range Hydrogen Sulfide and Carbon Monoxide • ± 20% of reading Safety/ • ATEX: II 1 G Ex da ia IIC T4 Ga Regulatory Certificate Number: DEKRA 17ATEX0103 X •...

  • Page 10: About This Manual

    About this Manual The GX-3R 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. 10 • Chapter 1: Introduction...

  • Page 11: Chapter 2: Description

    Figure 1: Component Location Case The GX-3R’s sturdy, high-impact plastic case is radio frequency (RF) resistant and is 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. The black bottom cover, located on the bottom of the case, allows access to the filters and sensors.

  • Page 12: Control Buttons

    Vibrator A vibrating motor inside the GX-3R case vibrates for gas alarms, unit malfunctions, and as an indicator during normal use of the various modes of the GX-3R. NOTE: If STEALTH is set to ON, the vibrator only functions when VIB in the STEALTH Gas Select Mode item is set to ON.

  • Page 13: 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-3R and the hollow side faces toward the GX-3R.

  • Page 14: Infrared Communications Port

    Logged data transmits through the port in standard IrDA protocol. A computer’s infrared port or an IrDA/USB cable connected to a USB port can be used to download data to the GX-3R Data Logger Management Program. See the GX-3R Data Logger Management Program operator’s manual for data logging and downloading instructions.

  • Page 15: Included Accessories

    Included Accessories Alligator Clip An alligator clip is installed on the back of the GX-3R. The alligator clip can be used to attach the GX-3R to clothing or a belt. Teeth in the alligator clip’s jaws prevent the unit from slipping off.

  • Page 16: Calibration Cup

    “Front” and “rear” imprinting on the bottom of the cup correspond to the front and rear of the GX-3R when the calibration cup is installed. In addition, a “front” label on the front of the calibration cup should be visible when viewing the LCD with the calibration cup installed.

  • Page 17: Irda Cable

    The RP-3R is a pump that draws sample to the GX-3R. IrDA Cable Unless your computer has a built-in IrDA port, an IrDA cable is needed to establish communication between the GX-3R and the Datalogging Program or the User Setup Program. GX-3R Operator’s Manual Chapter 2: Description • 17...

  • Page 18: Chapter 3: Operation

    Measuring Mode. Start Up This section explains how to start up the GX-3R, get it ready for operation, and turn it off. NOTE: The screens illustrated in this section are for a standard 4-gas unit. The screens displayed by your GX-3R may be slightly different.
  • Page 19 Buzzer sounds double pulsing None tone Action • Option A, Perform calibration: The GX-3R cannot be used until a • Option A, Perform calibration: Press and release POWER successful calibration is per- To perform a calibration, press MODE to perform a calibration.
  • Page 20 Buzzer sounds double pulsing tone None tone Action • Option A, Perform bump test: The GX-3R cannot be used until a • Option A, Perform bump test: Press and release POWER successful bump test has been per- To perform a bump test, press MODE to perform a bump test.
  • Page 21 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-3R Operator’s Manual Chapter 3: Operation • 21...
  • Page 22 Stn Id U_ID_001 S_ID_001 If the GX-3R 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 23: Performing A Demand Zero

    7:49 LIST LIMITED 12 . At the end of the 45 second warmup, the GX-3R begins monitoring for gas in Measuring Mode. The Measuring Mode Screen displays the current gas reading for each target gas. 7:49 %LEL 20.9...

  • Page 24: Measuring Mode Operation

    OFF, the GX-3R gives periodic indications to confirm that it’s operating or to indicate a non-compliance (pg.72). Monitoring an Area Start up the GX-3R as described above in “Start Up” on page 18. It is now in Measuring Mode. 7:49 %LEL 20.9...

  • Page 25: Combustible Gas Detection

    If you suspect that the GX-3R is not operating correctly: a. Take the GX-3R to a fresh air environment and perform a demand zero as described on pg.23. b. Perform a bump test as described on pg.46. Combustible Gas Detection There are three issues to keep in mind when monitoring for combustible gas.

  • Page 26: Oxygen-Enriched Atmospheres

    Overscale Protection The GX-3R 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 27: Alarms

    Alarm Indications The GX-3R buzzer sounds an alarm, the LEDs flash, and the vibrator pulses when any sort of alarm condition or failure occurs. If the GX-3R is operating in Stealth Mode, the buzzer does not sound and the vibrator’s operation depend on the VIB setting in Gas Select Mode’s STEALTH menu item.
  • Page 28 • SENSOR appears at the bottom of Double pulsing tone once per the screen and the failed sensor(s) are second indicated with FAIL under the gas name. • Alarm LEDs flash once per second 28 • Chapter 3: Operation GX-3R Operator’s Manual...

  • Page 29: Responding To 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-3R or with another gas detecting device. CAUTION: High off-scale readings may indicate an explosive concentration. PRUDENCE: Des lectures élevées hors échelle peuvent indiquer une concentration explosive.
  • Page 30 “Recharging the Batteries” on page 80. The GX-3R 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 31 Measuring Mode if the instrument must be used temporarily. CAUTION: There will be no datalogging function if you operate the instrument after a 031 system failure. Contact RKI Instruments, Inc. as soon as possible. GX-3R Operator’s Manual Chapter 3: Operation • 31...

  • Page 32: Data Logging

    The data logging capacity depends on how often the GX-3R stores data, how many channels are active, and how often the GX-3R is turned on and off. The table below 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 33: Chapter 4: Display Mode

    Mode (factory setting is OFF). Only appears if CAL RMDR is set to ON in User Mode (factory setting). Only appears if BUMP.RMDR is set to ON in User Mode (factory setting is OFF). GX-3R Operator’s Manual Chapter 4: Display Mode • 33...

  • Page 34: Tips For Using Display Mode

    (lower for oxygen), the peak reading is cleared, or the GX-3R is turned off. The lunch break feature enables the GX-3R to save peak readings when it is turned off so it can continue with the same peaks when it is turned on again. See pg.71 for instructions to turn the lunch break feature on (default is off).

  • Page 35: Stel Screen (Stel)

    TWA is cleared when the GX-3R is turned off. If LUNCH is set to ON, the GX-3R remembers TWA readings when it is turned off so it can continue them when it is turned on again. See pg.71 for instructions to turn the lunch break feature on (default is off).
  • Page 36 MMA (methyl methacrylate) DME (dimethyl ether) MIBK (methyl isobutyl ketone) THF (tetrahydrofuran) x = not available O = available After entering Display Mode, press and release POWER MODE until LIST appears. 7:49 LIST 36 • Chapter 4: Display Mode GX-3R Operator’s Manual...

  • Page 37: Changing The User Id (User Id)

    DISP in Maintenance Mode is set to ON (factory setting is OFF). Use this screen to select a user ID from the 128 user IDs that are stored in the GX-3R’s memory. Before a user ID is selected on a brand new instrument, the user ID is “----------”.

  • Page 38: Changing The Station Id (Stn Id)

    Use this screen to select a station ID from the 128 station IDs that are stored in the GX-3R’s memory. Before a station ID is selected on a brand new instrument, the station ID is “----------”. The factory-installed station IDs have a “S_ID_XXX” format.

  • Page 39: Last Successful Calibration Date (Cal Data)

    CAL DATA CAL DATA When you are done viewing the last calibration date for the sensors, press and release POWER MODE to return to the CAL DATA screen in Display Mode. GX-3R Operator’s Manual Chapter 4: Display Mode • 39...

  • Page 40: Last Successful Bump Test Date (Bump Data)

    POWER MODE to return to the BUMP DATA screen in Display Mode. Date, Time, Temperature Screen (TEMP) The TEMP screen shows the instrument’s date and time and the surrounding area’s temperature. 7:49 12. 26 7:49 22°C 40 • Chapter 4: Display Mode GX-3R Operator’s Manual...

  • Page 41: Viewing Alarm Settings Screen (Alarm--Pt)

    2000 200.0 1200 100.0 F.S. ALARM H 7:49 7:49 %LEL 19.5 WARNING STEL 7:49 7:49 %LEL 18.0 30.0 ALARM Press and release POWER MODE to return to the Alarm Points Screen. GX-3R Operator’s Manual Chapter 4: Display Mode • 41...

  • Page 42: Chapter 5: User Mode And Calibration

    Chapter 5: User Mode and Calibration Overview This section describes the GX-3R in User Mode. See Table 9 below 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 43 ON: Lunch break feature is on. Instrument asks if you want to resume TWA and PEAK read- ings at startup. OFF (factory setting): Lunch break feature is off. Instrument resets TWA and PEAK read- ings every time it’s turned on. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 43...
  • Page 44 ON: User Mode is password-protected. Factory-set password is 0405. (pg.76) OFF (factory setting): User Mode is not password-protected. ROM/SUM View the firmware information for the GX-3R’s sensor board and main board. (pg.77) START (pg.78) Press and release POWER MODE to begin the warmup sequence and enter Measuring Mode.

  • Page 45: Entering User Mode

    The GX-3R is not in operation as a gas detector while in User Mode. Take the GX-3R to a non-hazardous location and turn it off if it is on. Press and hold AIR, then press and hold POWER MODE. When you hear a beep, release the buttons.

  • Page 46: Tips For Using User Mode

    19.5% is acceptable. CAUTION: Although the GX-3R can be bump tested with an oxygen concentration of up to 19.5%, RKI Instruments, Inc. recommends that a multi-gas cylinder have an oxygen concentration in the range of 10% - 16% oxygen.
  • Page 47 Install the calibration cup onto the GX-3R. Use the label and imprinting to make sure that the calibration cup gets installed in the correct orientation relative to the GX-3R. Be sure the calibration cup is pushed on all the way.
  • Page 48 Auto start after successful cal set to on? (default is on) *NOTE: Auto start after successful bump/cal parameters set using Datalogging or SDM-3R PC Programs. Figure 7: Bump Test Flow Chart 48 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...
  • Page 49 POWER MODE to go to the START item in the BUMP menu. 7. Remove the calibration cup. 8. Press and release POWER MODE to enter Measuring Mode. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 49...
  • Page 50 BUMP menu. %LEL 11.9 6. Use AIR to scroll to START and press 7:49 and release POWER MODE to enter %LEL 11.9 Measuring Mode. 7. Calibrate the GX-3R as soon as BUMP/ possible. BUMP/ 7:49 %LEL 7:49 %LEL /CAL 4. Close the regulator.
  • Page 51 7. Press and release POWER MODE to return to the START item in the BUMP enter Measuring Mode. menu. 8. Press and release POWER MODE to enter Measuring Mode. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 51...

  • Page 52: Performing A Calibration (Gas Cal)

    Press and release POWER MODE to enter the AIR CAL menu. 7:49 %LEL 20.9 AIR CAL Make sure the GX-3R has been turned on for at least 45 seconds before continuing. Press and hold AIR until the screen prompts you to release it. 7:49 7:49 Air CAL...
  • Page 53 Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed flow regulator onto the calibration cylinder. Install the calibration cup onto the GX-3R. Use the label and imprinting to make sure that the calibration cup gets installed in the correct orientation relative to the GX-3R. Be sure the calibration cup is pushed on all the way.
  • Page 54 -compensated CO sensor is installed, H is assigned to Cylinder D. Make sure the GX-3R has been turned on for at least 45 seconds before continuing. Press and release POWER MODE. The gas readings flash and the bottom of the screen alternates between “APPLY” and “AUTO CAL”.
  • Page 55 Auto start after successful cal set to on? (default is on) *NOTE: Auto start after successful cal parameter set using Datalogging or SDM-3R PC Programs. Figure 9: Calibration Flow Chart GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 55...
  • Page 56 10. After the last cylinder is calibrated, the instrument continues to the START item in the AUTO CAL menu. 11. Remove the calibration cup. 12. Press and release POWER MODE to enter Measuring Mode. 56 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...
  • Page 57 6. Unscrew the regulator. 7. Remove the calibration cup. 8. The instrument continues to the START item in the AUTO CAL menu. 9. Press and release POWER MODE to enter Measuring Mode. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 57...
  • Page 58 Press and release POWER MODE. The Auto Cal screen for gases assigned to Cylinder A appears. Use AIR to scroll to CAL--P. 7:49 CAL--P Press and release POWER MODE. The combustible gas channel appears. 7:49 %LEL - - - CAL--P 58 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...
  • Page 59 11 . Repeat Step 7 through Step 10 for any other channels that need to be changed. 12 . Use AIR to scroll to ESCAPE. 13 . Press and release POWER MODE. The instrument returns to the CAL--P menu item in the Auto Cal Menu. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 59...
  • Page 60 A displays. Use AIR to scroll to CYL SEL. 7:49 CYL SEL Press and release POWER MODE. The combustible gas channel displays. 7:49 %LEL - - - CYL SEL 60 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...
  • Page 61 15 . Press and release POWER MODE. The instrument returns to the AUTO CAL menu item in the GAS CAL menu. 16 . See “Exiting the GAS CAL Menu” on page 62 to return to User Mode. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 61...

  • Page 62: Setting Calibration Parameters (Cal Set)

    CAL RMDR CAL RMDR ON (factory setting): The GX-3R gives an indication at start up if it is due for calibration. The type of indication depends on the CAL EXPD setting (see pg.63). OFF: The GX-3R does not give an indication at start up if it is due for calibration.
  • Page 63 Press and release AIR to continue without calibrating or press and release POWER MODE to perform a calibration. CANT USE: The GX-3R gives an indication at start up if calibration is past due. Press and release POWER MODE to enter User Mode and perform a calibration. Pressing AIR has no effect.

  • Page 64: Setting Bump Test Parameters (Bump Set)

    Press and release POWER MODE to save the setting and return to the GAS TIME menu item. See “Exiting the SETTINGS Menu” on page 66 to return to the BUMP SET menu. 64 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...
  • Page 65 For example, if the CAL TIME is set to 90 seconds and the GAS TIME is set to 30 seconds, if the bump test fails, the GX-3R will only be exposed to gas for an additional 60 seconds. The available values are 90 seconds (factory setting), and 120 seconds.
  • Page 66 BUMP SET menu. BUMP.RMDR ON: The GX-3R gives an indication at start up if it is due for bump testing. The type of indication depends on the BUMP.EXPD setting (see pg.67). OFF (factory setting): The GX-3R does not give an indication at start up if it is due for bump testing.
  • Page 67 MODE to perform a bump test. CANT USE: The GX-3R gives an indication at start up if a bump test is past due. Press and release POWER MODE to enter User Mode and perform a bump test. Pressing AIR has no effect.

  • Page 68: Alarm Settings (Alarm--Pt)

    The ALARM--PT menu item has 3 items: ALARM--PT, DEF--ALMP, and ESCAPE. While in User Mode, press AIR to scroll to ALARM--PT. 7:49 ALARM--PT Press and release POWER MODE. The first channel displays. 7:49 %LEL - - - ALARM--PT 68 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...
  • Page 69 7:49 %LEL - - - - - - ALARM--PT ALARM--PT 7:49 7:49 - - - ALARM--PT DEF--ALMP 7:49 7:49 - - - ALARM--PT ESCAPE Press and release POWER MODE. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 69...
  • Page 70 Defaulting the alarm points defaults them back to factory settings as outlined in Table on page 8 or to the settings saved in the SAVE-AP menu item in Gas Select Mode if you have performed a SAVE-AP operation. 70 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...

  • Page 71: Updating The Lunch Break Setting (Lunch)

    TWA and PEAK readings and the time in operation from the last time the GX-3R was used or start collecting new readings and reset the time in operation. While in User Mode, press AIR to scroll to LUNCH.

  • Page 72: Setting The Confirmation Beep And Non-Compliance Indicator (Beep)

    OFF (factory setting): The GX-3R does not provide a confirmation alert or non-compliance indicator. LED: The GX-3R’s LEDs double flash as often as defined by the BEEP INT parameter to verify that the instrument is operating. BUZZER: The GX-3R’s buzzer double beeps as often as defined by the BEEP INT parameter to verify that the instrument is operating.
  • Page 73 While in the BEEP menu, press AIR to scroll to ESCAPE. Press and release POWER MODE. The instrument return to the BEEP menu item. See “Entering Measuring Mode (START)” on page 78 to enter Measuring Mode. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 73...

  • Page 74: Updating The Backlight Time (Bl Time)

    Press and release POWER MODE to save the setting and return to the KEY TONE menu item. See “Entering Measuring Mode (START)” on page 78 to enter Measuring Mode. 74 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...

  • Page 75: Display Mode Items (Disp Set)

    This menu item only appears if ZFLW.DISP is set to ON in Maintenance Mode (factory setting is OFF). The ZERO.FLWR setting is not intended for field adjustment. The default setting is ON. The oxygen channel does not support zero follower functionality. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 75...

  • Page 76: Setting The Date/Time (Date)

    See “Entering Measuring Mode (START)” on page 78 to enter Measuring Mode. Turning the Password On/Off (PASSWORD) ON: The GX-3R prompts you for a password when you enter User Mode. The factory-set password is 0405 but it can be changed as desired.

  • Page 77: Viewing The Rom/Sum (Rom/Sum)

    SENS. ROM Press and release POWER MODE to return to the ROM/SUM menu item in User Mode. See “Entering Measuring Mode (START)” on page 78 to enter Measuring Mode. GX-3R Operator’s Manual Chapter 5: User Mode and Calibration • 77...

  • Page 78: Entering Measuring Mode (Start)

    Entering Measuring Mode (START) While in User Mode, press AIR to scroll to START. 7:49 START Press and release POWER MODE. The instrument begins its warmup sequence. 78 • Chapter 5: User Mode and Calibration GX-3R Operator’s Manual...

  • Page 79: Chapter 6: Maintenance

    Chapter 6: Maintenance Overview This chapter describes troubleshooting procedures for the GX-3R. 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.

  • Page 80: Instrument Cleaning

    Instrument Cleaning Clean the GX-3R with a cloth dampened with water if it becomes excessively dirty. Do not use alcohol or other cleaning solvents. Recharging the Batteries WARNING: To prevent ignition of a hazardous atmosphere, batteries must only be charged in an area known to be nonhazardous.

  • Page 81: Replacing The Buzzer Cover

    L EL Figure 10: Connecting the Charging Cable The LED at the top of the GX-3R turns orange while charging. When a full charge has been reached, approximately 3 hours, the LED turns green. Remove the charging cable from the GX-3R.

  • Page 82: Replacing The Sensor Filters

    Turn the GX-3R upside down. Use a small Phillips screwdriver to unscrew the two screws holding the bottom cover to the rest of the GX-3R’s case. Only unscrew them until the heads are flush with the edge of the bottom cover.
  • Page 83 10 . Reinstall the filter gasket/hydrophobic dust filter assembly onto the sensor retainer. The gasket tabs face down. 11 . Reattach the bottom cover to the GX-3R. Push it onto the GX-3R until it snaps into place. 12 . Reinstall the two screws that were loosened in Step 3.

  • Page 84: Replacing The Hydrophobic Dust Filter

    Turn the GX-3R upside down. Use a small Phillips screwdriver to unscrew the two screws holding the bottom cover to the rest of the GX-3R’s case. Only unscrew them until the heads are flush with the edge of the bottom cover.

  • Page 85: Replacing A Sensor

    Turn the GX-3R upside down. Use a small Phillips screwdriver to unscrew the two screws holding the bottom cover to the rest of the GX-3R’s case. Only unscrew them until the heads are flush with the edge of the bottom cover.
  • Page 86 10 . If the filter gasket/hydrophobic dust filter assembly came out, reinstall it with the gasket tabs facing down. 11 . Reattach the bottom cover to the GX-3R. Push it onto the GX-3R until it snaps into place. 12 . Reinstall the two screws that were loosened in Step 3.

  • Page 87: Chapter 7: Storage

    Discharge the battery to 1 bar in the battery icon to help prolong battery life and prevent battery deterioration Disposal • Remove the batteries • Dispose in accordance with local regulations GX-3R Operator’s Manual Chapter 7: Storage and Disposal • 87...

  • Page 88: Chapter 8: General Parts List

    Chapter 8: General Parts List Table 11 lists part numbers for the GX-3R’s replacement parts and accessories. Table 11: General Parts List Part Number Description 06-1248RK-03 Calibration kit tubing, 3 foot length 10-1087 Screw, for bottom cover and for battery pack...
  • Page 89 Table 11: General Parts List (cont.) Part Number Description 71-0491 Operator’s Manual, GX-3R Datalogging Program 81-0000RK-51 Calibration cylinder, 200 ppm H in air, 34 liter steel 81-0090RK-01 Calibration cylinder, 3-gas (CH /CO), 34 liter steel 81-0090RK-03 Calibration cylinder, 3-gas (CH...

  • Page 90: Appendix A: Maintenance Mode

    Appendix A: Maintenance Mode Overview This appendix describes the GX-3R in Maintenance Mode. The GX-3R 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 12 below.
  • Page 91 OFF: You cannot manually perform a fresh air adjust in Measuring Mode by pressing AIR. AUTOZERO ON: The GX-3R asks if you want to perform a fresh air adjustment at the end of the (pg.98) startup sequence. OFF (factory setting): The GX-3R does not ask if you want to perform a fresh air adjust- ment at the end of the startup sequence.

  • Page 92: Entering Maintenance Mode

    The GX-3R is not in operation as a gas detector while in Maintenance Mode. Take the GX-3R to a non-hazardous location and turn it off if it is on. Press and hold AIR, then press and hold POWER MODE. You will hear a beep after one second.

  • Page 93: Tips For Using Maintenance Mode

    Measuring Mode. Preparing for a Gas Test To perform a gas test on the GX-3R, you will need: • A calibration cylinder. The concentrations should be above the alarm condition you want to check.
  • Page 94 Install the calibration cup onto the GX-3R. Use the label and imprinting to make sure that the calibration cup gets installed in the correct orientation relative to the GX-3R. Be sure the calibration cup is pushed on all the way.

  • Page 95: Sensor/Battery Replacement Date (Sen Date)

    Unscrew the regulator from the calibration cylinder. Remove the calibration cup from the GX-3R. Store the calibration kit in a safe and convenient place. Press and release POWER MODE to return to the GAS TEST menu item in Maintenance Mode.

  • Page 96: Performing A Bump Test (Bump)

    See “Entering Measuring Mode (START)” on page 102 to enter Measuring Mode. Performing a Bump Test (BUMP) See “Performing a Bump Test (BUMP)” on page 46 for a description of the BUMP menu item. 96 • Appendix A: Maintenance Mode GX-3R Operator’s Manual...

  • Page 97: Setting Alarms To Latching Or Self-Resetting (Latching)

    Setting Alarms to Latching or Self-Resetting (LATCHING) ON (factory setting): The GX-3R remains in alarm until the alarm condition passes and POWER MODE is pressed. OFF: The GX-3R automatically resets an alarm when the alarm condition passes. While in Maintenance Mode, press AIR to scroll to LATCHING.

  • Page 98: Turning The Auto Zero Function On/Off (Autozero)

    Turning the Auto Zero Function On/Off (AUTOZERO) ON: The GX-3R asks if you want to perform a fresh air adjustment at the end of the startup sequence. OFF (factory setting): The GX-3R does not ask if you want to perform a fresh air adjustment at the end of the startup sequence.

  • Page 99: Turning The Zero Suppression On/Off (Zero Sup)

    Maintenance Mode. It is not normally necessary to have the zero suppression menu item appear in User Mode. Contact RKI Instruments before turning this setting on. User Mode Zero Follower (ZFLW.DISP) ON: Zero follower menu item appears in User Mode.

  • Page 100: Turning The Password On/Off (Password)

    See “Entering Measuring Mode (START)” on page 102 to enter Measuring Mode. Turning the Password On/Off (PASSWORD) ON (factory setting): The GX-3R prompts you for a password when you enter Maintenance Mode. The factory-set password is 8102 but it can be changed as desired.

  • Page 101: Viewing The Rom/Sum (Rom/Sum)

    M.DEFAULT Press and release POWER MODE to continue. Press and release AIR to return to the M.DEFAULT menu item in Maintenance Mode. 7:49 7:49 7:49 M.DEFAULT YES / MODE / AIR GX-3R Operator’s Manual Appendix A: Maintenance Mode • 101...

  • Page 102: Entering Measuring Mode (Start)

    See “Entering Measuring Mode (START)” on page 102 to enter Measuring Mode. Entering Measuring Mode (START) While in Maintenance Mode, press AIR to scroll to START. 7:49 START Press and release POWER MODE. The instrument begins its warmup sequence. 102 • Appendix A: Maintenance Mode GX-3R Operator’s Manual...

  • Page 103: Appendix B: Gas Select Mode

    Appendix B: Gas Select Mode Overview This appendix describes the GX-3R in Gas Select Mode. The GX-3R 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 13 below.

  • Page 104: Entering Gas Select Mode

    Entering Gas Select Mode WARNING: The GX-3R is not in operation as a gas detector while in Gas Select Mode. Take the GX-3R to a non-hazardous location and turn it off if it is on. Press and hold AIR, then press and hold POWER MODE. You will hear a beep after one second.

  • Page 105: Changing The Gas Combination (Gas Comb)

    While in Gas Select Mode, press AIR to scroll to GAS COMB. 7:49 GAS COMB Press and release POWER MODE. The first channel displays. 7:49 %LEL - - - GAS COMB GX-3R Operator’s Manual Appendix B: Gas Select Mode • 105...
  • Page 106 - - - GAS COMB Press and release POWER MODE. The target gas for the selected channel flashes. In the example below, the combustible gas channel is selected. 7:49 SELECT 106 • Appendix B: Gas Select Mode GX-3R Operator’s Manual...

  • Page 107: Saving The Alarm Points (Save-Ap)

    Performing a SAVE-AP operation has no effect on an M.DEFAULT in Maintenance Mode. An M.DEFAULT operation returns all instrument settings to the RKI default regardless of if a SAVE-AP operation was performed. GX-3R Operator’s Manual Appendix B: Gas Select Mode • 107...

  • Page 108: Turning Calibration Max Span On/Off (Max Span)

    See “Exiting Gas Select Mode (START)” on page 111 to enter Measuring Mode. Turning Calibration Max Span On/Off (MAX SPAN) ON: After a passed calibration, the GX-3R displays the maximum possible adjustment it could have made to the response reading. So if the combustible gas channel was calibrated...

  • Page 109: Stealth And Vibrator Settings (Stealth)

    IEC: Apply the IEC settings (per IEC 60079-20-1 2010[ed1.0]) for the lower explosive limit’s ppm level. ISO: Apply the ISO settings (per ISO 10156 2017) for the lower explosive limit’s ppm level. GX-3R Operator’s Manual Appendix B: Gas Select Mode • 109...
  • Page 110 Dimethyl ether (DME) 30,000 27,000 27,000 Methyl isobutyl ketone (MIBK) 12,000 12,000 12,000* Tetrahydrofuran (THK) 20,000 15,000 15,000* * Values are actually IEC because no ISO definition exists for these gases. 110 • Appendix B: Gas Select Mode GX-3R Operator’s Manual...

  • Page 111: Exiting Gas Select Mode (Start)

    See “Exiting Gas Select Mode (START)” on page 111 to enter Measuring Mode. Exiting Gas Select Mode (START) While in Gas Select Mode, press AIR to scroll to START. 7:49 START Press and release POWER MODE. The instrument begins its warm-up sequence. GX-3R Operator’s Manual Appendix B: Gas Select Mode • 111...

  • Page 112: Appendix C: Interference Information

    -0.6 ppm Methyl Ethyl Ketone C4H8O 0.45 vol% 0.0 ppm Methyl Isobutyl Ketone C6H12O 0.30 vol% 0.0 ppm Methyl Methacrylate C5H8O2 0.43 vol% 0.1 ppm n-Hexane n-C6H14 0.30 vol% 0.0 ppm 112 • Appendix C: Interference Information GX-3R Operator’s Manual...
  • Page 113 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-3R Operator’s Manual Appendix C: Interference Information • 113...

  • Page 114: Esr-A13P-Co, Co Detection

    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 Methyl Isobutyl Ketone 3000 ppm -1 ppm 114 • Appendix C: Interference Information GX-3R Operator’s Manual...
  • Page 115 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-3R Operator’s Manual Appendix C: Interference Information • 115...

  • Page 116: Esr-A1Cp-Coh, H -Compensated Co Detection

    1 ppm Methanol 1.38 vol% 131 ppm Methyl Ethyl Ketone 0.45 vol% 0 ppm Methyl Isobutyl Ketone 0.30 vol% 0 ppm Methyl Methacrylate 0.43 vol% 1 ppm n-Hexane 0.30 vol% 1 ppm 116 • Appendix C: Interference Information GX-3R Operator’s Manual...
  • Page 117 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-3R Operator’s Manual Appendix C: Interference Information • 117...

  • Page 118: Esr-A1Dp-Cohs, Co Detection

    15 ppm Methane 1.25 vol% -1 ppm Methanol 1000 ppm 10 ppm Methyl Ethyl Ketone 0.45 vol% -1 ppm Methyl Isobutyl Ketone 0.3 vol% 0 ppm Methyl Methacrylate 0.425 vol% 2 ppm 118 • Appendix C: Interference Information GX-3R Operator’s Manual...
  • Page 119 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-3R Operator’s Manual Appendix C: Interference Information • 119...

  • Page 120: Esr-A1Dp-Cohs, H 2 S Detection

    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 Methyl Ethyl Ketone 0.45 vol% 0.3 ppm Methyl Isobutyl Ketone 0.3 vol% -0.1 ppm 120 • Appendix C: Interference Information GX-3R Operator’s Manual...
  • Page 121 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-3R Operator’s Manual Appendix C: Interference Information • 121...
  • Page 122 Warranty RKI Instruments, Inc. warrants the GX-3R sold by us to be free from defects in materials, workmanship, and performance for a period of three years from the date of shipment from RKI Instruments, Inc. This includes the instrument and the original sensors. Replacement parts are warranted for 1 year from the date of their shipment from RKI Instruments, Inc.

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