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

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GX-3R Pro
Operator's Manual
Part Number: 71-0478
Revision: 0
Released: 5/17/22
RKI Instruments, Inc.
www.rkiinstruments.com

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Summary of Contents for RKI Instruments GX-3R Pro

  • Page 1 GX-3R Pro Operator’s Manual Part Number: 71-0478 Revision: 0 Released: 5/17/22 RKI Instruments, Inc. www.rkiinstruments.com...
  • Page 2 The instrument does not need to be calibrated unless it does not pass the 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 Pro Operator’s Manual • 2...

  • Page 3: Table Of Contents

    About the GX-3R Pro ........
  • Page 4 Turning On the GX-3R Pro ........
  • Page 5 Pairing a GX-3R Pro........
  • Page 6 Disconnecting a Paired GX-3R Pro ........
  • Page 7 Warranty ............214 7 • GX-3R Pro Operator’s Manual...

  • Page 8: Chapter 1: Introduction

    Overview This chapter briefly describes the GX-3R Pro gas monitor. This chapter also describes the GX-3R Pro Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the GX-3R Pro. About the GX-3R Pro...

  • Page 9: Specifications

    ± 20% of reading * The GX-3R Pro 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: IR Sensor Specifications...
  • Page 10 2.00 ppm 0.30 ppm 2.00 ppm Setpoint Alarm 35 ppm 10.0 ppm 4.00 ppm 0.60 ppm 5.00 ppm Setpoint Alarm H 300 ppm 30.0 ppm 20.00 ppm 0.60 ppm 100.00 ppm Setpoint GX-3R Pro Operator’s Manual Chapter 1: Introduction • 10...
  • Page 11 4.7 ppm 0.50 ppm 0.30 ppm 2.00 ppm Indication ± 10% of reading or ± 5% of full scale (whichever is greater) Accuracy Table 4: GX-3R Pro Specifications Sampling Diffusion Method Response Time T90 within 30 seconds Display Graphics LCD Display Max.
  • Page 12 Table 4: GX-3R Pro Specifications • Lithium ion battery pack (3.7 VDC, 200 mA) Power Supply • Alkaline battery pack with 2 AAA batteries (3.0 VDC, 250 mA) Lithium Ion • Standard 4 gas + super-toxic EC: 25 hours (23 hours with...

  • Page 13: About This Manual

    About this Manual The GX-3R Pro 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.

  • Page 14: Chapter 2: Description

    Figure 1: Component Location Case The GX-3R Pro’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 15: Control Buttons

    GX-3R Pro’s many display and adjustment options. Vibrator A vibrating motor inside the GX-3R Pro case vibrates for gas alarms, unit malfunctions, and as an indicator during normal use of the various modes of the GX-3R Pro.

  • Page 16: Sensors

    A dummy sensor is installed in any units that have less than 4 sensors. Dummy sensors are factory installed. The flat side of the dummy sensor faces away from the GX-3R Pro and the hollow side faces toward the GX-3R Pro.

  • Page 17: Filters

    HCN sensor is installed). The filter disk prolongs the life of the sensors by preventing H S in the ambient air from reaching the sensor. The filter should be replaced every 6 months. 17 • Chapter 2: Description GX-3R Pro Operator’s Manual...

  • Page 18: Infrared Communications Port

    The battery icon in the upper right of the LCD shows remaining battery life. A low battery warning activates when the GX-3R Pro detects a low battery voltage. The GX-3R Pro sounds a dead battery alarm when battery voltage is too low for Measuring Mode.

  • Page 19: Included Accessories

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

  • Page 20: Calibration Cup

    “Front” and “rear” imprinting on the bottom of the cup correspond to the front and rear of the GX-3R Pro 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 21: Sdm-3R

    (Standalone Mode) or a computer can be used to control the docking station (PC Controlled Mode). See the appropriate SDM-3R manual for more information. RP-3R The RP-3R is a pump that draws sample to the GX-3R Pro. See the RP-3R manual for more information. Aspirator Adapter The aspirator adapter is a squeeze-bulb assembly that draws sample to the GX-3R Pro.

  • Page 22: Chapter 3: Measuring Mode

    GX-3R Pro’s Measuring Mode. Start Up This section explains how to start up the GX-3R Pro, get it ready for operation, and turn it off. WARNING: A thin protective film covers the display to prevent scratches during shipping.
  • Page 23 Buzzer sounds double pulsing tone None Action • Option A, Perform calibration: The GX-3R Pro cannot be used until • Option A, Perform calibration: To Press and release POWER MODE a successful calibration is per- perform a calibration, press and to perform a calibration.
  • Page 24 Buzzer sounds double pulsing tone None Action • Option A, Perform bump test: The GX-3R Pro cannot be used until • Option A, Perform bump test: To Press and release POWER MODE a successful bump test is performed. perform a bump test, press and to perform a bump test.
  • Page 25 The alarm latching/self-resetting setting is on the second line (see page 181 for a description of how to change this setting). The battery pack type is on the bottom line. 7:49 3.7V LATCHING Li-ion 25 • Chapter 3: Operation GX-3R Pro Operator’s Manual...
  • Page 26 50 1200 100.0 vol% 23.5 3.00 7:49 %LEL ALARM H 100 2000 200.0 vol% 40.0 10.00 7:49 FULL SCALE vol% 3.00 7:49 STEL %LEL vol% 19.5 0.50 7:49 WARNING vol% 0.50 GX-3R Pro Operator’s Manual Chapter 3: Operation • 26...
  • Page 27 USER ID STATION ID 9. If the GX-3R Pro 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 28 Measuring Mode. 7:49 LIMITED HC GAS LIST 12. At the end of the 45 second warmup, the GX-3R Pro begins monitoring for gas in Measuring Mode. The Measuring Mode Screen displays the current gas reading for each target gas. 7:49 %LEL vol% 20.9...

  • Page 29: Performing A Demand Zero

    (if KEY TONE is set to ON in User Mode). 4. Continue to hold AIR until the LCD prompts you to release it. The GX-3R Pro sets the fresh air readings for all channels. Start up is complete and the unit is now ready for monitoring.

  • Page 30: Measuring Mode Operation

    4. If Password Protection is turned On (factory setting is Off) using the SDM-3R PC program, a user-set password is required to turn off the GX-3R Pro. When the password screen appears, adjust each digit with the AIR button and press and release the POWER MODE button to move on to the next digit.

  • Page 31: Monitoring An Area

    Monitoring an Area 1. Start up the GX-3R Pro as described above in “Start Up” on page 22. It is now in Measuring Mode. 7:49 %LEL vol% 20.9 0.00 2. Take the GX-3R Pro to the monitoring area. 3. Wait at least 15 seconds and observe the display for gas readings. If a reading is observed, allow the reading to stabilize to determine the gas concentration(s) present.
  • Page 32 The table below lists the conversion factors for several hydrocarbon gases if the GX-3R Pro is calibrated to methane. To use this table, multiply the display reading on the combustible gas channel by the factor in the appropriate row to obtain the actual gas concentration.
  • Page 33 Overscale Protection The GX-3R Pro 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 34: Oxygen-Enriched Atmospheres

    Oxygen-Enriched Atmospheres The GX-3R Pro is not intended for use in oxygen-enriched atmospheres. WARNING: Do not use the GX-3R Pro in an environment whose oxygen concentration is above 21% . -Compensated CO Detection • GX-3R displays CO readings. • H reading is not displayed but “H2 RICH”...

  • Page 35: Aspirator Adapter Sampling

    1. Turn on the GX-3R Pro as described on page 22. 2. Attach the sample cup to the GX-3R Pro. Use the label and imprinting to make sure that the sample cup gets installed in the correct orientation relative to the GX-3R Pro. Be sure the sample cup is pushed on all the way.

  • Page 36: Alarms

    Alarm Indications The GX-3R Pro buzzer sounds an alarm, the LEDs flash, and the vibrator pulses when any sort of alarm condition or failure occurs. If the GX-3R Pro is operating in Stealth Mode, the buzzer does not sound and the vibrator’s operation depends on the VIBRATION setting in Gas Select Mode’s...
  • Page 37 • Vibrator pulses twice the units and MOVER. per second • Alarm LEDs flash in circle sequence twice per second • Backlight turns on 37 • Chapter 3: Operation GX-3R Pro Operator’s Manual...
  • Page 38 Man Down Warning 2 • Alarm LEDs flash twice per Single pulsing tone twice second per second The WARNING 2 TIME defined in User Mode has passed since the instrument detected movement. GX-3R Pro Operator’s Manual Chapter 3: Operation • 38...

  • Page 39: Responding To Alarms

    AIR button and press and release the POWER MODE button to move on to the next digit. Once the password is entered, the alarm condition resets. 7:49 0000 PASSWORD 39 • Chapter 3: Operation GX-3R Pro Operator’s Manual...
  • Page 40 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-3R Pro or with another gas detecting device. CAUTION: High off-scale readings may indicate an explosive concentration.
  • Page 41 Responding to Battery Alarms WARNING: The GX-3R Pro is not operational as a gas monitoring device during a dead battery alarm. Take the Model GX-3R Pro to a non-hazardous area and replace or recharge the batteries as described on page 120 and page 121.
  • Page 42 2. Attempt to set the date using the DATE User Mode menu item as described on page 113. 3. If the date cannot be set correctly, contact RKI Instruments, Inc. as soon as possible. Responding to System Failure Alarms 1.
  • Page 43 3. If the error code is anything but 031, the instrument cannot be used. Contact RKI Instruments, Inc. as soon as possible. If the error code is 031, you may press and release POWER MODE to continue into Measuring Mode if the instrument must be used temporarily.

  • Page 44: Data Logging

    The data logging capacity depends on how often the GX-3R Pro stores data, how many channels are active, and how often the GX-3R Pro 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 four sensors, is only turned on once, and there are no alarm occurrences.

  • Page 45: Chapter 4: Display Mode

    BUMP DATA Displays the last bump test date for each sensor. (page 53) DATE (page 54) Displays the current date, time, and temperature. ALARM POINTS View alarm points (page 55) 45 • Chapter 4: Display Mode GX-3R Pro Operator’s Manual...

  • Page 46: Tips For Using Display Mode

    • To exit from an entered-information screen and go back to the main menu, press and release POWER MODE. NOTE: Each screen displays for 20 seconds. If you do not press a button for 20 seconds, the GX-3R Pro automatically returns to Measuring Mode. GX-3R Pro Operator’s Manual Chapter 4: Display Mode • 46...

  • Page 47: Peak Screen (Peak)

    The peak screen displays the highest (lowest for oxygen) concentrations detected since the GX- 3R Pro was turned on. Peak readings are stored in the GX-3R Pro’s memory until a higher level is detected (lower for oxygen), the peak reading is cleared, or the GX-3R Pro is turned off.

  • Page 48: Twa Screen (Twa)

    TWA is cleared when the GX-3R Pro is turned off. If LUNCH BREAK is set to ON, the GX-3R Pro will remember TWA readings when it is turned off so it can continue them when it is turned on again. See page 106 for instructions to turn the lunch break feature on (default is off).
  • Page 49 C5H10 (cyclopentane) C6H6 (benzene) n-C6H14 (hexane) C7H8 (toluene) n-C7H16 (heptane) C8H10 (xylene) n-C9H20 (nonane) EtAc (ethyl acetate) IPA (isopropyl alcohol) MEK (methyl ethyl ketone) MMA (methyl methacrylate) DME (dimethyl ether) 49 • Chapter 4: Display Mode GX-3R Pro Operator’s Manual...
  • Page 50 HC GAS LIST screen. 5. The gas formula displays at the bottom of the Measuring Mode screen. The gas selection remains in effect if you turn the instrument off and on again. GX-3R Pro Operator’s Manual Chapter 4: Display Mode • 50...

  • Page 51: User Id Screen (User Id)

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

  • Page 52: Last Successful Calibration Date (Cal Data)

    CAL REMINDER is set to ON in User Mode. 1. While in Display Mode, press and release POWER MODE until CAL DATA appears. 7:49 YES : AIR NO : MODE CAL DATA GX-3R Pro Operator’s Manual Chapter 4: Display Mode • 52...

  • Page 53: Last Successful Bump Test Date (Bump Data)

    This screen only appears if BUMP REMINDER is set to ON in User Mode. 1. While in Display Mode, press and release POWER MODE until BUMP DATA appears. 7:49 YES : AIR NO : MODE BUMP DATA 53 • Chapter 4: Display Mode GX-3R Pro Operator’s Manual...

  • Page 54: Date, Time, And Temperature Screen (Date)

    The DATE screen shows the date and time of the instrument and the temperature of the surrounding area. 1. While in Display Mode, press and release POWER MODE until DATE appears. 7:49 MM/DD/YYYY 1/14/2019 7:49 DATE ° GX-3R Pro Operator’s Manual Chapter 4: Display Mode • 54...

  • Page 55: Alarm Points Screen (Alarm Points)

    40.0 10.00 23.5 3.00 FULL SCALE ALARM H 7:49 7:49 %LEL vol% vol% 19.5 0.50 3.00 WARNING STEL 7:49 7:49 %LEL 30.0 vol% vol% 18.0 3.00 0.50 ALARM 55 • Chapter 4: Display Mode GX-3R Pro Operator’s Manual...

  • Page 56: Screen Inversion On/Off (Invert Select)

    2. Press and release AIR. The current setting flashes. 3. Use AIR to display the desired setting. 4. Press and release POWER MODE to save the setting and return to the INVERT SELECT screen. GX-3R Pro Operator’s Manual Chapter 4: Display Mode • 56...

  • Page 57: Lcd Color Scheme (Lcd Background)

    If BLE Auto Shut Off When Idle, accessible in the Datalogging or SDM-3R Program, is selected (factory setting) and if the GX-3R Pro does not pair to a phone in the first 5 minutes after startup, the GX-3R Pro’s Bluetooth gets shut off to conserve battery life.

  • Page 58: Adjusting The Buzzer Volume (Buzzer Volume)

    1. While in Display Mode, press and release POWER MODE until the LANGUAGE screen appears. 7:49 7:49 LANGUAGE LANGUAGE CHANGE CHANGE TO ENGLISH TO ENGLISH YES : AIR NO : MODE GX-3R Pro Operator’s Manual Chapter 4: Display Mode • 58...
  • Page 59 CHANGE CHANGE TO ENGLISH TO ENGLISH YES : AIR NO : MODE 3. Press and release POWER MODE to confirm that you want to change the language back to English. 59 • Chapter 4: Display Mode GX-3R Pro Operator’s Manual...

  • Page 60: Chapter 5: User Mode And Calibration

    Chapter 5: User Mode and Calibration Overview This section describes the GX-3R Pro 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 61 Options: 90 (factory setting) or 120 seconds AUTO CAL ON (factory setting): If a bump test fails, a cali- bration automatically starts. OFF: If a bump test fails, a calibration does not automatically start. 61 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 62 PANIC (page ON: Panic alarm can be triggered. OFF (factory setting): Panic alarm cannot be triggered. MAN DOWN ALARM TIME WARNING 2 TIME WARNING 1 TIME (page 99) TIME GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 62...
  • Page 63 (page 107) Options: 0.5 minute and 1 to 99 minutes in 1 minute increments. Factory setting is 5 minutes. ESCAPE Return to the CONFIRMATION menu item in User Mode. 63 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 64 AIR CAL. 111)*** OFF (factory setting): CO channel is not adjusted during a demand zero, auto zero, or AIR CAL. DATE (page 112) Set the current date and time. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 64...

  • Page 65: Entering User Mode

    WARNING: The GX-3R Pro is not in operation as a gas detector while in User Mode. 1. Take the GX-3R Pro to a non-hazardous location and turn it off if it is on. 2. Press and hold AIR, then press and hold POWER MODE. Release the buttons when you hear a beep.

  • Page 66: Tips For Using User Mode

    • To skip an item when a question is asked, press and release AIR. • To enter an item and to save any changes, press and release POWER MODE. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 66...

  • Page 67: Performing A Bump Test (Bump Test)

    • Non-absorbent tubing • Calibration cup 1. Confirm that the GX-3R Pro’s calibration gas values match the concentrations listed on the calibration gas cylinder(s) as described on page 85. 2. Confirm that your cylinder selections are appropriate as described on page 88.
  • Page 68 3. Install the calibration cup onto the GX-3R Pro. Use the label and imprinting to make sure that the calibration cup gets installed in the correct orientation relative to the GX-3R Pro. Be sure the calibration cup is pushed on all the way.
  • Page 69 8. Make sure the GX-3R Pro has been turned on for at least 45 seconds before continuing. 9. For toxic gas cylinders (like cylinders containing H S), it is important to vent the regulator while installing it onto the cylinder. Venting the regulator during installation helps prevent air from getting into the cylinder and degrading the gas.
  • Page 70 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 8: Bump Test Flow Chart GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 70...
  • Page 71 6. After the last cylinder is bump tested, press and release POWER MODE to go to the START item in the BUMP menu. 7. Press and release POWER MODE to enter Measuring Mode. 71 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 72 Use AIR to scroll to START and press and MAINTE 7:49 %LEL release POWER MODE to enter Measuring 12.0 MAINTE 7:49 Mode. %LEL Calibrate the GX-3R Pro as soon as 11.9 possible. 11.9 BUMP TEST BUMP TEST MAINTE 7:49 %LEL 20.5...
  • Page 73 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. 73 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...

  • Page 74: Performing A Calibration (Gas Cal)

    3. Press and release POWER MODE. The Gas Cal menu appears. 4. Use AIR to place the cursor next to AIR CAL. MAINTE 7:49 AIR CAL CO2 ZERO CAL AUTO CAL GAS CAL GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 74...
  • Page 75 MAINTE 7:49 %LEL 20.9 AIR CAL 6. Make sure the GX-3R Pro has been turned on for at least 45 seconds before continuing. 7. Press and hold AIR until the screen prompts you to release it. MAINTE 7:49 MAINTE 7:49...
  • Page 76 2. Install the calibration cup onto the GX-3R Pro. Use the label and imprinting to make sure that the calibration cup gets installed in the correct orientation relative to the GX-3R Pro. Be sure the calibration cup is pushed on all the way.
  • Page 77 See “Troubleshooting” on page 118. 13. Unscrew the regulator from the calibration cylinder. 14. Remove the calibration cup from the GX-3R Pro. 15. Store the calibration kit in a safe and convenient place. 16. Use AIR to place the cursor next to ESCAPE.
  • Page 78 • Non-absorbent tubing • Calibration cup 1. Confirm that the GX-3R Pro’s calibration gas values match the concentrations listed on the calibration gas cylinder(s) as described on page 85. 2. Confirm that your cylinder selections are appropriate as described on page 88.
  • Page 79 3. Install the calibration cup onto the GX-3R Pro. Use the label and imprinting to make sure that the calibration cup gets installed in the correct orientation relative to the GX-3R Pro. Be sure the calibration cup is pushed on all the way.
  • Page 80 Toxic sensors are assigned to Cylinder D or Cylinder E. 6. Make sure the GX-3R Pro has been turned on for at least 45 seconds before continuing. 7. Press and release POWER MODE. 8. The gas readings flash and the bottom of the screen indicates “AUTO CAL” and “APPLY GAS”.
  • Page 81 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 11: Calibration Flow Chart 81 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 82 After the last cylinder is calibrated, the instrument continues to the START MEASURE item in the AUTO CAL menu. Remove the calibration cup. Press and release POWER MODE to enter Measuring Mode. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 82...
  • Page 83 7. Remove the calibration cup. 8. The instrument continues to the START MEASURE item in the AUTO CAL menu. 9. Press and release POWER MODE to enter Measuring Mode. 83 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 84 5. Use AIR to scroll to SETTING CAL--P. MAINTE 7:49 SETTING CAL--P 6. Press and release POWER MODE. The combustible gas channel displays. MAINTE %LEL - - - - SETTING CAL--P GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 84...
  • Page 85 1.0 ppm 200.0 ppm Carbon Monoxide 15 ppm 2,000 ppm Hydrogen (for H -compensated 25 ppm 2,000 ppm CO sensor); needs monthly calibration Ammonia 8 ppm 400 ppm 85 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 86 1. While in User Mode, use AIR to place the cursor next to GAS CAL. MAINTE 7:49 BUMP TEST GAS CAL CAL SETTING USER MODE 2. Press and release POWER MODE. The Gas Cal menu appears. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 86...
  • Page 87 5. Use AIR to scroll to CYL SETTING. MAINTE 7:49 CYL SETTING 6. Press and release POWER MODE. The combustible gas channel displays. MAINTE %LEL - - - - CYL SETTING 87 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 88 12. Use AIR to place the cursor next to ESCAPE. 13. Press and release POWER MODE. The instrument will return to the CYL SETING menu item in the Auto Cal Menu. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 88...

  • Page 89: Setting Calibration Parameters (Cal Setting)

    GAS CAL CAL SETTING BUMP SETTING USER MODE 2. Press and release POWER MODE. The CAL SETTING menu appears. MAINTE 7:49 CAL REMINDER CAL INTERVAL CAL EXPIRED CAL SETTING 89 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 90 CAL REMINDER ON (factory setting): The GX-3R Pro gives an indication at start up if it is due for calibration. The type of indication depends on the CAL EXPIRED setting (see page 91). OFF: The GX-3R Pro does not give an indication at start up if it is due for calibration.
  • Page 91 Press and release AIR to continue without calibrating or POWER MODE to perform a calibration. CANNOT USE: The GX-3R Pro 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 92: Setting Bump Test Parameters (Bump Setting)

    AUTO CAL, and ESCAPE. 1. While in the BUMP SETTING menu, use AIR to place the cursor next to BUMP PARAMETER. MAINTE 7:49 BUMP PARAMETER BUMP REMINDER BUMP INTERVAL BUMP SETTING GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 92...
  • Page 93 4. Press and release POWER MODE to save the setting and return to the BUMP PARAMETER menu. 5. See “ESCAPE” on page 96 to return to the BUMP SETTING menu. 93 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 94 CAL TIME is set to 90 seconds and the GAS TIME is set to 30 seconds, if the bump test fails, the GX-3R Pro will only be exposed to gas for an additional 60 seconds. The available values are 90 seconds (factory setting), and 120 seconds.
  • Page 95 BUMP REMINDER ON: The GX-3R Pro gives an indication at start up if it is due for bump testing. The type of indication depends on the BUMP EXPIRED setting (see page 97). OFF (factory setting): The GX-3R Pro does not give an indication at start up if it is due for bump testing.
  • Page 96 CANNOT USE: The GX-3R Pro 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 97 2. Press and release POWER MODE. The instrument will return to User Mode. 3. See “Returning to Measuring Mode (START MEASURE)” on page 117 to return to Measuring Mode. 97 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...

  • Page 98: Adjusting Man Down And Panic Settings (Man Down)

    4. Press and release POWER MODE to save the setting and return to the MAN DOWN menu. 5. See “ESCAPE” on page 101 to return to User Mode. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 98...
  • Page 99 1. While in the MAN DOWN menu, use AIR to place the cursor next to MAN DOWN TIME. MAINTE 7:49 PANIC MAN DOWN TIME ESCAPE MAN DOWN MENU 99 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 100 2. Press and release POWER MODE. The instrument returns to User Mode. 3. See “Returning to Measuring Mode (START MEASURE)” on page 117 to return to Measuring Mode. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 100...

  • Page 101: Alarm Settings (Alarm Setting)

    7:49 MAN DOWN ALARM SETTING LUNCH BREAK USER MODE 2. Press and release POWER MODE. The first channel displays. MAINTE 7:49 %LEL - - - - ALARM SETTING 101 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 102 ALARM SETTING - - - - ALARM SETTING MAINTE 7:49 MAINTE 7:49 DEFAULT ALM--P - - - - MAINTE 7:49 ALARM SETTING ESCAPE 2. Press and release POWER MODE. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 102...
  • Page 103 ALARM H 400.0 ppm 0.50 ppm WARNING ALARM ALARM H 20.00 ppm 0.05 ppm WARNING ALARM ALARM H 20.00 ppm 0.50 ppm WARNING ALARM ALARM H 100.00 ppm 103 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 104 2. Press and release POWER MODE. The instrument returns to User Mode. 3. See “Returning to Measuring Mode (START MEASURE)” on page 117 to return to Measuring Mode. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 104...

  • Page 105: Updating The Lunch Break Setting (Lunch Break)

    TWA and PEAK readings and the time in operation from the last time the GX-3R Pro was used or start collecting new readings and reset the time in operation. 1. While in User Mode, use AIR to place the cursor next to LUNCH BREAK.
  • Page 106 BUMP/CAL: If a bump test or a calibration is due and if BUMP EXPIRED or CAL EXPIRED is set to CONFIRM TO USE or NO EFFECT, the GX-3R Pro’s LEDs double flash as often as defined by the BEEP INTERVAL parameter to indicate a non-compliance. Once a successful bump test or calibration (depending on which is due) is done, the LEDs stop flashing.
  • Page 107 2. Press and release POWER MODE. The instrument returns to User Mode. 3. See “Returning to Measuring Mode (START MEASURE)” on page 117 to return to Measuring Mode. 107 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...

  • Page 108: Auto Backlight In Low Light (Auto Backlight)

    Auto Backlight in Low Light (AUTO BACKLIGHT) The GX-3R Pro has a luminescence sensor that allows the instrument to detect how bright an environment is. ON (factory setting): The instrument’s backlight automatically turns on in a low light environment. OFF: The instrument’s backlight does not automatically turn on in a low light environment.

  • Page 109: Turning The Key Tone On/Off (Key Tone)

    KEY TONE D MODE SETTING IR UNIT SELECT USER MODE 2. Press and release POWER MODE. The current setting flashes. 3. Use AIR to display the desired setting. 109 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...
  • Page 110 The ZERO FOLLOWER setting is not intended for field adjustment. The oxygen channel does not support zero follower functionality. The default setting is ON for all other channels. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 110...

  • Page 111: Reading Units For Ir Sensor (Ir Unit Select)

    2. Press and release POWER MODE. The current setting flashes. 3. Use AIR to display the desired setting. 4. Press and release POWER MODE to save the setting and return to User Mode. 111 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...

  • Page 112: Setting The Date/Time (Date)

    YYYY/MM/DD: year, month, day. DD/MM/YYYY: day, month, year. 1. While in User Mode, use AIR to place the cursor next to DATE FORMAT. MAINTE 7:49 DATE DATE FORMAT LANGUAGE USER MODE GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 112...

  • Page 113: Changing The Instrument Language (Language)

    Measuring Mode. Turning the Password On/Off (USER PASSWORD) ON: The GX-3R Pro prompts you for a password when you enter User Mode. The factory-set password is 0405 but it can be changed as desired. OFF (factory setting): No password is required to enter User Mode.

  • Page 114: Viewing The Rom/Sum (Rom/Sum)

    The ROM/SUM screen shows the instruments’ firmware version and firmware checksum. 1. While in User Mode, use AIR to place the cursor next to ROM/SUM. MAINTE 7:49 USER PASSWORD ROM / SUM RADIO STANDARD USER MODE GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 114...

  • Page 115: Viewing The Radio Standards (Radio Standard)

    2. Press and release POWER MODE. The radio standards display. MAINTE 7:49 Contains IC: 4389B-EYSHJN Contains FCC ID: RYYEYSHJN RADIO STANDARD 3. Press and release POWER MODE to return to User Mode. 115 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual...

  • Page 116: Returning To Measuring Mode (Start Measure)

    1. While in User Mode, use AIR to place the cursor next to START MEASURE. MAINTE 7:49 ROM / SUM RADIO STANDARD START MEASURE USER MODE 2. Press and release POWER MODE. 3. The instrument begins its start-up sequence. GX-3R Pro Operator’s Manual Chapter 5: User Mode and Calibration • 116...

  • Page 117: Chapter 6: Maintenance

    Chapter 6: Maintenance Overview This chapter describes troubleshooting procedures for the GX-3R Pro. It also includes procedures for instrument cleaning, replacing and 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 118: Instrument Cleaning

    Instrument Cleaning Clean the GX-3R Pro with a cloth dampened with water if it becomes excessively dirty. Do not use alcohol or other cleaning solvents. GX-3R Pro Operator’s Manual Chapter 6: Maintenance • 118...

  • Page 119: Replacing The Batteries (Alkaline Version)

    NOTE: Use Duracell MN2400 or PC2400 alkaline batteries or RKI Instruments, Inc. lithium- ion battery pack 49-1625 to maintain the CSA classification of the GX-3R Pro. Use of other batteries will void the CSA classification and may void the warranty. Do not mix old/new or different types of batteries.

  • Page 120: Recharging The Batteries (Li-Ion Version)

    Figure 12: Installing the Alkaline Batteries 5. Use a coin or a screwdriver to turn the battery cover clockwise. 6. Turn on the GX-3R Pro and confirm that it starts up. Recharging the Batteries (Li-ion Version) WARNING: To prevent ignition of a hazardous atmosphere, batteries must only be charged in an area known to be nonhazardous.
  • Page 121 3. Plug the charging jack straight into the GX-3R Pro’s charging socket from the top. When properly connected, a green LED turns on at the top of the GX-3R Pro. Figure 13: Connecting the Charging Cable 4. 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.

  • Page 122: Replacing The Buzzer Cover

    6. Turn on the GX-3R Pro and confirm that it starts up. Replacing the Buzzer Cover The buzzer cover may need to be replaced if it becomes saturated or clogged with particles. 1. Remove the rubber boot from the GX-3R Pro.

  • Page 123: Replacing The Sensor Filters

    Replacing the Sensor Filters CAUTION: The buzzer cover, sensors, filters, and alkaline batteries are the only user- serviceable parts in the GX-3R Pro. Do not replace or modify any other part. Combustible Gas Sensor Filter The H S filter disk is dark red in color and although it may darken over time, its color is not indicative of remaining filter life.
  • Page 124 2. Turn the GX-3R Pro upside down. 3. Use a small Phillips screwdriver to unscrew the two screws holding the bottom cover to the rest of the GX-3R Pro’s case. Only unscrew them until the heads are flush with the edge of the bottom cover.
  • Page 125 11. Reinstall the sensor retainer over the sensors. 12. Reattach the bottom cover to the GX-3R Pro. Push it onto the GX-3R Pro until it snaps into place. 13. Reinstall the two screws that were loosened in Step 3.

  • Page 126: Replacing The Hydrophobic Dust Filter

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

  • Page 127: Replacing A Sensor

    2. Turn the GX-3R Pro upside down. 3. Use a small Phillips screwdriver to unscrew the two screws holding the bottom cover to the rest of the GX-3R Pro’s case. Only unscrew them until the heads are flush with the edge of the bottom cover.
  • Page 128 Figure 18: Replacing a Sensor 8. If your instrument has a factory-installed dummy sensor, ensure that it is still installed correctly. Make sure that the flat side is facing up, away from the GX-3R Pro. GX-3R Pro Operator’s Manual Chapter 6: Maintenance • 128...

  • Page 129: Replacing The Battery Board

    9. 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-3R Pro. Be sure the filter gasket/sensor retainer is oriented correctly.
  • Page 130 9. Place the black rectangular gasket flat in the rear case. 10. Place the new battery board battery-side-down in the rear case. The case has protrusions that fit in holes on the battery board. GX-3R Pro Operator’s Manual Chapter 6: Maintenance • 130...
  • Page 131 Black Plastic Spacer Rear Case Figure 22: Reinstalling the Battery Board 12. Secure the battery board and spacer using the screws removed in Step 7. Figure 23: Reinstalling Battery Board Screws 131 • Chapter 6: Maintenance GX-3R Pro Operator’s Manual...
  • Page 132 Figure 25: Reinstalling Case Screws 15. Reinstall the rubber boot, if being used. 16. Turn on the GX-3R Pro. 17. If the instruments goes into a clock failure, set the date/time as described on page 113. GX-3R Pro Operator’s Manual...

  • Page 133: Chapter 7: Storage And Disposal

    It is important to replace or recharge the batteries every 6 months during storage. If a GX-3R Pro completely loses power during storage, the date/time must be reset as described on page 113.

  • Page 134: Chapter 8: General Parts List

    Charging cable for multi-unit charger, 2 feet 47-5084RK USB/IrDA adapter module, no USB cable (for all premier portables) 47-5084RK-01 USB/IrDA adapter module, with USB cable (for all premier portables) GX-3R Pro Operator’s Manual Chapter 8: General Parts List • 134...
  • Page 135 49-1626 Alkaline battery pack 57-2099 Replacement Li-ion battery with board 65-7004 Dummy sensor 71-0478 Operator’s Manual, GX-3R Pro (this document) 71-0491 Operator’s Manual, GX-3R Datalogging Program 81-0000RK-51 Calibration cylinder, 200 ppm H in air, 34 liter steel 81-0071RK-01 Calibration cylinder, 5,000 ppm CO...
  • Page 136 2.5% volume CO in N cylinder, two 0.25 LPM regulators, calibration tubing, and case 81-PAC Calibration kit: 58 liter 5-gas (CH S/CO/SO ) cylinder, 0.25 LPM regulator, calibration tubing, and case GX-3R Pro Operator’s Manual Chapter 8: General Parts List • 136...
  • Page 137 ) sensor ESR-X13P-OXY Oxygen sensor IRR-0409 Carbon dioxide (CO ) sensor, 0 - 10% volume IRR-0433 Carbon dioxide (CO ) sensor, 0 - 10,000 ppm NCR-6309 Combustible gas sensor, catalytic 137 • Chapter 8: General Parts List GX-3R Pro Operator’s Manual...

  • Page 138: Appendix A: Rk Link Phone App

    If a paired GX-3R Pro is turned off, it must be paired with the app again when it is turned back on. If the app is closed while a GX-3R Pro is paired, the GX-3R Pro must be paired with the app again when the app is reopened.
  • Page 139 4. Press “Pairing”. 5. If your phone’s Bluetooth is not turned on, the app will prompt you to turn it on. Press “Allow”. Then press “Pairing” again. 139 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...
  • Page 140 6. Select the GX-3R Pro you’d like to pair with then press “Pairing”. 7. A “Connection completed” message appears once the GX-3R Pro is connected to your phone. Press “OK”. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 140...

  • Page 141: Searching For A Paired Gx-3R Pro

    8. The Measuring Mode screen appears. Searching for a Paired GX-3R Pro Using the app’s detector search function allows you to find a connected GX-3R Pro that may have been set down somewhere. NOTE: This feature does not work if the GX-3R Pro is operating in stealth mode.

  • Page 142: Disconnecting A Paired Gx-3R Pro

    3. Press “Detector search”. The GX-3R Pro’s buzzer, LEDs, and vibrator activate unless the GX- 3R Pro is operating in Stealth Mode. If the GX-3R Pro is operating in Stealth Mode, the GX- 3R Pro will not respond to a detector search.
  • Page 143 After 5 minutes, the GX-3R Pro’s Bluetooth gets shut off to conserve battery life. If you want to pair to the GX-3R Pro after 5 minutes of disconnection, you will need to turn the Bluetooth back on in Display Mode.

  • Page 144: Adjusting App Notification Settings

    Adjusting App Notification Settings 1. Press the button in the upper right corner of the app. 2. Press “Application settings”. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 144...
  • Page 145 • Vibration type: Define the app’s vibration pattern. • Display setting: Indicates the time format and time zone. This is not adjustable. 145 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...

  • Page 146: Defining Owner Information

    Defining Owner Information Owner information can be defined with or without a GX-3R Pro paired with the app. Owner information gets sent out with email alerts along with the station ID and user ID from the GX-3R Pro. 1. Press the button in the upper right corner of the app.
  • Page 147 3. Press “Owner information setting” at the bottom of the screen. You may need to scroll down to make it visible. 4. Type in the name, company name, and department name. 147 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...

  • Page 148: Setting Up Email/Text Alerts

    Setting Up Email/Text Alerts Email and text alert setup can be done with or without a GX-3R Pro paired with the app. Figure 26: Email Alert for Past Due Bump Test Figure 27: Text Alert for CO Warning and Alarm GX-3R Pro Operator’s Manual...
  • Page 149 1. Press the button in the upper right corner of the app. GX-3R Pro Connected GX-3R Pro Disconnected 2. Press “Application settings”. 149 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...
  • Page 150 3. Make sure “Group notification settings” is turned on. 4. Press “Notification Settings”. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 150...
  • Page 151 5. Make sure “Application Server” is selected in the “Text Service” and “Email Service” sections. 6. Press “Application Server Settings”. 151 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...
  • Page 152 7. Enter your first name, last name, phone number, and email address. All fields are required for the notifications to function. 8. Press “OK”. A User ID is automatically generated. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 152...
  • Page 153 9. Use your phone’s “Back” button or the button to get back to the “Application Settings” screen. 10. Press “Email notification settings” at the bottom of the screen. 153 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...
  • Page 154 • ALARM: Sends an alert or notification for any gas alarm (warning, alarm, alarm H, STEL, TWA). • MANDOWN: Sends an alert or notification for a man down alarm. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 154...
  • Page 155 14. Type in an email address or phone number and press “New registration” to add the email address/phone number to the list. 155 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...
  • Page 156 16. Press the new email address/phone number and confirm that a check mark appears to its right. If there is no check mark, that email address/phone number will not be included in the alert! GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 156...
  • Page 157 18. Press OK. You will be returned to the group settings screen. To add another group, type in a new name and press “New registration”. Repeat steps 6 - 9. 19. Use your phone’s “Back” button to return to the Measuring Mode screen. 157 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...

  • Page 158: Changing Gx-3R Pro Parameters

    No link preview Link preview Changing GX-3R Pro Parameters GX-3R Pro parameters can only be viewed or changed when a GX-3R Pro is paired with the app. Entering the Gas Detector Setting Menu 1. From the home screen, press the button in the upper right corner of the app.
  • Page 159 • If you turned your instrument’s User Mode Password on but then turned it off, the app password is still the instrument’s old User Mode password. The app password does not go back to 0000 after you turn off the instrument’s User Mode password. 159 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...

  • Page 160: Alarm Settings

    1. Access the Gas Detector Setting Menu as described on page 160. 2. Press “Alarm Setting”. 3. Press the channel whose alarm points you want to view or change. The H S channel is selected in the example below. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 160...

  • Page 161: Calibration And Bump Settings

    6. Adjust the alarm setpoints by pressing the current setpoint and scrolling to the desired value. Calibration and Bump Settings 1. Access the Gas Detector Setting Menu as described on page 160. 2. Press “Calibration/BUMP Setting”. 161 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...
  • Page 162 3. Turn the calibration and bump test reminder screens on or off with the toggle buttons. Set the calibration and bump test intervals. 4. Scroll down to view or change the auto calibration value for each channel. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 162...

  • Page 163: Backlight Setting

    3. Set how long (in seconds) the backlight stays on after each button press. The options are 0-255 seconds. The factory setting is 30 seconds. 4. Press your phone’s “Back” button. 163 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...

  • Page 164: Logger Data Settings

    3. Set the interval trend time, Station ID, and User ID. The serial number is not editable. 4. Press “Send”. There is no confirmation that the information sent. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 164...

  • Page 165: Viewing Serial Number, Ids, And Bump/Cal Information

    Viewing Serial Number, IDs, and Bump/Cal Information Serial number, ID, and bump/cal information can only be viewed when a GX-3R Pro is paired with the app. 1. Press the button in the upper right corner of the app. 2. Press “Detector information”.
  • Page 166 3. Detector information appears. 4. To view information for the last successful calibration and bump test, press the “Calibration BUMP history” button. GX-3R Pro Operator’s Manual Appendix A: RK Link Phone App • 166...
  • Page 167 5. The instrument’s serial number, station ID, user ID, and part of the calibration information appear. 6. Scroll down to view the complete calibration information and/or the bump test information. 167 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...

  • Page 168: Viewing App Version Info

    Viewing App Version Info App version information can be viewed with or without a GX-3R Pro paired with the app. 1. Press the button in the upper right corner of the app. 2. Press “Version information”. GX-3R Pro Operator’s Manual...
  • Page 169 3. Instrument information and app information appear. 4. To view the license information, press “License information”. 169 • Appendix A: RK Link Phone App GX-3R Pro Operator’s Manual...

  • Page 170: Appendix B: Maintenance Mode

    Appendix B: Maintenance Mode Overview This appendix describes the GX-3R Pro in Maintenance Mode. The GX-3R Pro 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 below.
  • Page 171 AIR. AUTO ZERO (page 179) ON: The GX-3R Pro asks if you want to perform a fresh air adjustment at the end of the startup sequence. OFF (factory setting): The GX-3R Pro does not ask if you want to perform a fresh air adjustment at the end of the startup sequence.
  • Page 172 (page 183) password is 8102. OFF: Maintenance Mode is not password-protected. ROM/SUM (page 184) View the firmware information for the GX-3R Pro’s sensor board(s), main board, gas list, and view the Bluetooth version. LCD CONTRAST (page 185) 1-50 (factory setting 20) M.DEFAULT (page 185)

  • Page 173: Entering Maintenance Mode

    WARNING: The GX-3R Pro is not in operation as a gas detector while in Maintenance Mode. 1. Take the GX-3R Pro 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 174: Tips For Using Maintenance Mode

    • A calibration cylinder. The concentrations should be above the alarm condition you want to check. Standard alarm points are listed on page 9. • 0.25 LPM fixed flow regulator • Non-absorbent tubing • Calibration cup GX-3R Pro Operator’s Manual Appendix B: Maintenance Mode • 174...
  • Page 175 1. Install the calibration cup onto the GX-3R Pro. Use the label and imprinting to make sure that the calibration cup gets installed in the correct orientation relative to the GX-3R Pro. Be sure the calibration cup is pushed on all the way.

  • Page 176: Sensor/Battery Replacement Date (Sensor Date)

    5. Turn the regulator knob clockwise to close the regulator. 6. Unscrew the regulator from the calibration cylinder. 7. Remove the calibration cup from the GX-3R Pro. 8. Store the calibration kit in a safe and convenient place. 9. Press and release POWER MODE to return to Maintenance Mode.

  • Page 177: Performing A Bump Test (Bump Test)

    7. See “Exiting Maintenance Mode (START MEASURE)” on page 189 to return to Measuring Mode. Performing a Bump Test (BUMP TEST) See “Performing a Bump Test (BUMP TEST)” on page 68 for instructions. 177 • Appendix B: Maintenance Mode GX-3R Pro Operator’s Manual...

  • Page 178: Setting Alarms To Latching Or Self-Resetting (Latching)

    Setting Alarms to Latching or Self-Resetting (LATCHING) ON (factory setting): The GX-3R Pro remains in alarm until the alarm condition passes and POWER MODE is pressed. OFF: The GX-3R Pro automatically resets an alarm when the alarm condition passes. 1. While in Maintenance Mode, use AIR to place the cursor next to LATCHING.

  • Page 179: Turning Auto Zero On/Off (Auto Zero)

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

  • Page 180: Turning Zero Suppression On/Off (Zero Suppress)

    ON (factory setting): Zero suppression menu item appears in User Mode. OFF: Zero suppression menu item does not appear in User Mode. Zero suppression menu item is always available in Maintenance Mode. GX-3R Pro Operator’s Manual Appendix B: Maintenance Mode • 180...

  • Page 181: User Mode Zero Follower (Disp Zero Flwr)

    Maintenance Mode. It is not normally necessary to have the zero follower menu item appear in User Mode. Contact RKI Instruments before turning this setting on. Setting the Date/Time (DATE) 1. While in Maintenance Mode, use AIR to place the cursor next to DATE.

  • Page 182: Setting The Date Format (Date Format)

    4. Press and release POWER MODE to save the setting and return to Maintenance Mode. 5. See “Exiting Maintenance Mode (START MEASURE)” on page 189 to return to Measuring Mode. GX-3R Pro Operator’s Manual Appendix B: Maintenance Mode • 182...

  • Page 183: Turning The Password On/Off (Maint Password)

    Turning the Password On/Off (MAINT PASSWORD) ON (factory setting): The GX-3R Pro prompts you for a password when you enter Maintenance Mode. The factory-set password is 8102 but can be changed as desired. OFF: No password is required to enter Maintenance Mode.

  • Page 184: Viewing The Rom/Sum (Rom/Sum)

    3. Press and release POWER MODE to return to the ROM/SUM menu item in Maintenance Mode. 4. See “Exiting Maintenance Mode (START MEASURE)” on page 189 to return to Measuring Mode. GX-3R Pro Operator’s Manual Appendix B: Maintenance Mode • 184...

  • Page 185: Adjusting The Lcd's Contrast (Lcd Contrast)

    RESTORE ALL ? YES : MODE NO : AIR M .DEFAULT M .DEFAULT 3. Press and release POWER MODE to continue. Press and release AIR to return to Maintenance Mode. 185 • Appendix B: Maintenance Mode GX-3R Pro Operator’s Manual...

  • Page 186: Exiting Maintenance Mode (Start Measure)

    1. While in Maintenance Mode, use AIR to place the cursor next to START MEASURE. MAINTE 7:49 LCD CONTRAST M. DEFAULT START MEASURE MAINTENANCE 2. Press and release POWER MODE. 3. The instrument begins its start-up sequence. GX-3R Pro Operator’s Manual Appendix B: Maintenance Mode • 186...

  • Page 187: Appendix C: Gas Select Mode

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

  • Page 188: Tips For Using Gas Select 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-3R Pro Operator’s Manual Appendix C: Gas Select Mode • 188...

  • Page 189: Changing The Gas Combination (Gas Combo)

    GAS COMBO SAVE ALARM--P DISP MAX SPAN GAS SELECT MODE 2. Press and release POWER MODE. The first channel appears. MAINTE 7:49 %LEL - - - - GAS COMBO 189 • Appendix C: Gas Select Mode GX-3R Pro Operator’s Manual...
  • Page 190 MAINTE 7:49 MAINTE 7:49 - - - - GAS COMBO ESCAPE 4. Press and release POWER MODE. 5. The target gas for the channel appears. MAINTE 7:49 GAS COMBO GX-3R Pro Operator’s Manual Appendix C: Gas Select Mode • 190...
  • Page 191 • NO2 (nitrogen dioxide) • HCN (hydrogen cyanide) • PH3 (phosphine) • ----------- (off) * If CH4_VOL is selected, the CHANGE LEL item in Gas Select Mode has no effect on operation. 191 • Appendix C: Gas Select Mode GX-3R Pro Operator’s Manual...

  • Page 192: Saving The Alarm Points (Save Alarm-P)

    3. Press and release POWER MODE to save the current alarm point settings as the default. 4. The instrument returns to Gas Select Mode. 5. See “Exiting Gas Select Mode (START MEASURE)” on page 199 to return to Measuring Mode. GX-3R Pro Operator’s Manual Appendix C: Gas Select Mode • 192...

  • Page 193: Turning The Calibration Max Span On/Off (Disp Max Span)

    • The instrument’s buzzer does not sound for any reason, even alarm conditions. • An “S” appears at the top of the LCD. OFF (factory setting): The instrument’s backlight and LEDs operate normally. 193 • Appendix C: Gas Select Mode GX-3R Pro Operator’s Manual...

  • Page 194: 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 Pro Operator’s Manual Appendix C: Gas Select Mode • 194...
  • Page 195 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. 195 • Appendix C: Gas Select Mode GX-3R Pro Operator’s Manual...

  • Page 196: Exiting Gas Select Mode (Start Measure)

    1. From the main menu, place the cursor in front of START MEASURE at the bottom of the menu. MAINTE 7:49 STEALTH CHANGE LEL START MEASURE GAS SELECT MODE 2. Press and release POWER MODE. 3. The unit begins its start-up sequence. GX-3R Pro Operator’s Manual Appendix C: Gas Select Mode • 196...

  • Page 197: Appendix D: Interference Information

    0.48 ppm 4.0 ppm Propane 0.88 vol% 0.1 ppm Propylene 0.7 vol% 34.6 ppm Sulfur Dioxide 30.0 ppm 0.2 ppm The indicated value may fluctuate when exposed to this gas. 197 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...

  • Page 198: Esr-A13D-No2, No 2 Detection

    Methyl Ethyl Ketone 0.45 vol% -1.09 ppm Methyl Isobutyl Ketone 0.30 vol% -0.20 ppm Methyl Methacrylate 4250 ppm -0.13 ppm n-Hexane 0.30 vol% -0.02 ppm Nitrogen Monoxide 99.2 ppm -3.12 ppm GX-3R Pro Operator’s Manual Appendix D: Interference Information • 198...
  • Page 199 Sulfur Dioxide 5 ppm -4.99 ppm Tetrahydrofuran 0.50 vol% -0.90 ppm Toluene 1.0 vol% -0.46 ppm Xylene 1.0 vol% -0.12 ppm The indicated value may fluctuate when exposed to this gas. 199 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...

  • Page 200: Esr-A13D-Ph3, Ph 3 Detection

    100 ppm -0.44 ppm Propylene 0.5 vol% 1.99 ppm Silane 7.2 ppm 4.08 ppm Sulphur Dioxide 8.0 ppm 0.00 ppm Toluene 1.0 vol% -2.01 ppm Xylene 1.0 vol% -1.04 ppm GX-3R Pro Operator’s Manual Appendix D: Interference Information • 200...

  • Page 201: Esr-A13D-So2, So 2 Detection

    Methyl Ethyl Ketone 0.45 vol% 1.09 ppm Methyl Isobutyl Ketone 0.30 vol% 0.20 ppm Methyl Methacrylate 4250 ppm 0.13 ppm n-Hexane 0.30 vol% 0.02 ppm Nitrogen Dioxide 5.0 ppm -5.01 ppm 201 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...
  • Page 202 Propylene 0.5 vol% 48.27 ppm Tetrahydrofuran 0.50 vol% 0.90 ppm Toluene 1.0 vol% 0.46 ppm Xylene 1.0 vol% 0.12 ppm The indicated value may fluctuate when exposed to this gas. GX-3R Pro Operator’s Manual Appendix D: Interference Information • 202...

  • Page 203: Esr-A13I-H2S, H 2 S Detection

    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 Nitrogen Dioxide 5.0 ppm -0.4 ppm Nitrogen Monoxide 99.2 ppm 2.6 ppm 203 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...
  • Page 204 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 Pro Operator’s Manual Appendix D: Interference Information • 204...

  • Page 205: 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 205 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...
  • Page 206 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 Pro Operator’s Manual Appendix D: Interference Information • 206...

  • Page 207: Esr-A1Cp-Coh, H

    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 207 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...
  • Page 208 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 Pro Operator’s Manual Appendix D: Interference Information • 208...

  • Page 209: Esr-A1Dp-Cohs, Co Detection

    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 Methyl Isobutyl Ketone 0.3 vol% 0 ppm 209 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...
  • Page 210 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 Pro Operator’s Manual Appendix D: Interference Information • 210...

  • Page 211: Esr-A1Dp-Cohs, H

    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 211 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...
  • Page 212 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 Pro Operator’s Manual Appendix D: Interference Information • 212...

  • Page 213: Esr-B134-Nh3, Nh

    101 ppm 0.8 ppm Nitrogen Dioxide 99 ppm -23.9 ppm Oxygen 100 vol% 0.4 ppm Ozone 0.3 ppm 8.5 ppm Phosphine 0.5 ppm 1.0 ppm Sulfur Dioxide 30 ppm 1.0 ppm 213 • Appendix D: Interference Information GX-3R Pro Operator’s Manual...

  • Page 214: Warranty

    Warranty RKI Instruments, Inc. warrants the GX-3R Pro 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. Original NH sensors are warranted for 1 year, and all other original sensors are warranted for 3 years.

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