RKI Instruments GX-2012 Operator's Manual
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RKI Instruments GX-2012 Operator's Manual

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1.800.544.2843
GX-2012
Operator's Manual
Part Number: 71-0335
Revision: F
Released: 10/1/18
www.calcert.com
15
10
20
5
25
0
30
sales@calcert.com

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  • Page 1 GX-2012 Operator’s Manual Part Number: 71-0335 Revision: F Released: 10/1/18 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 2 Typical calibration frequencies for most applications are between 1 and 3 months, but can be required more often or less often based on your usage. GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 3 Warranty RKI Instruments, Inc. warrants the GX-2012 sold by us to be free from defects in materials, workmanship, and performance for a period of two years from the date of shipment from RKI Instruments, Inc. This includes the instrument and the original sensors.

  • Page 4: Table Of Contents

    Chapter 3: Using the GX-2012 in Normal Mode ....... . .
  • Page 5 Turning Off the GX-2012, Bar Hole Mode ......77 Chapter 5: Using the GX-2012 in Leak Check Mode ......78 Overview.
  • Page 6 Viewing Snap Log Data in Leak Check Mode Operation....90 Turning Off the GX-2012, Leak Check Mode ......92 Chapter 6: Maintenance Mode .
  • Page 7 Calibrating the GX-2012 ........

  • Page 8: Chapter 1: Introduction

    Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the GX-2012. About the GX-2012 Using an advanced detection system consisting of up to five gas sensors, the GX-2012 sample draw gas monitor detects the presence of combustible gas, oxygen (O ), carbon monoxide (CO), and hydrogen sulfide (H S) simultaneously.

  • Page 9: Specifications

    Specifications Table 1: GX-2012 Specifications Target Gas %LEL % Volume Oxygen (O Hydrogen Carbon Combustible Combustible Sulfide Monoxide (CO) (Methane (Methane Calibration Calibration Standard)* Standard) Range 0-100% LEL 0 - 100% vol 0-40.0% vol 0-100 ppm 0-500 ppm (Increment) (1% LEL) (1% vol) (0.1 vol%)

  • Page 10: About This Manual

    Approximately 171(H) x 65(W) x 39(D) mm (5.6”H x 2.5”W x 1.5”D) and Weight Approximately 310 g (11 oz.) *Some versions of the GX-2012 are available with the LEL sensor factory set for HC (general hydrocarbons) and calibrated to isobutane. Consult RKI Instruments, Inc. for further information.

  • Page 11: Chapter 2: Description

    Battery Arrays Cover (alkaline version) DISPLAY POWER RESE T (ADJ) ENTER SILENCE Charging Control (SHIFT) Buttons Contacts IR Port (behind button label) Figure 1: Components of the GX-2012, Front & Back GX-2012 Operator’s Manual Overview • 11 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 12: Case

    The battery pack release latch is on the bottom. The alkaline battery version also includes a battery cover release knob. The battery pack and flow chamber are located on the back of the GX-2012. The inlet filter holder is located on the top of the GX-2012 case.
  • Page 13 (TC) element for detection. The presence of combustible gas cools the element causing a change in the resistance of the element which affects the current flowing through it. The current is amplified by the GX-2012’s circuitry, converted to a measurement of combustible gas concentration, and displayed on the LCD.

  • Page 14: Lcd

    IrDA protocol. A computer’s infrared port or an IrDA/USB cable connected to a computer’s USB port can be used to download data saved by the GX-2012 to a computer using the GX-2012 Data Logger Management Program. See the GX-2012 Data Logger Management Program operator’s manual for data logging and downloading...

  • Page 15: Buzzer

    2012 because of flow rate reduction. Flow Chamber The flow chamber is on the back of the GX-2012 and is held in place by three phillips screws. The flow chamber seals to the rubber sensor gasket which seals to the sensor faces inside the GX-2012 and routes flow from the pump to the sensors and to the exhaust port (also a part of the flow chamber).

  • Page 16: Inlet Filter Holder

    GX-2012 to be securely attached to a belt. Wrist Strap A wrist strap is included with the GX-2012 and can be attached to the right or left wrist strap installation feature. Sample Hose & 10 Inch Probe A 10 foot sample hose and a 10 inch probe are included as standard with the GX-2012.

  • Page 17: Optional Accessories

    A rechargeable lithium ion battery pack is available for the GX-2012. A fully charged battery pack will power the GX-2012 for 10 hours. The batteries will last for a minimum of 500 charge cycles. See the “Parts List” on page 145 for ordering information.
  • Page 18 Figure 5. AC Adapter Charging Adapter Jack Adapter Jack Contacts To AC Outlet Charge LED Rear View Top View Figure 5: GX-2012 AC Powered Charging Station 18 • Optional Accessories GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 19: Optional Probes

    Rear View Top View Figure 6: GX-2012 DC Powered Charging Station Optional Probes Various optional probes designed for specific applications are available for the GX-2012. They include the following: • 30 inch aluminum probe Figure 7: 30 Inch Aluminum Probe This probe is designed for applications where it is necessary to put the probe tip in areas that are out of reach with the standard probe.
  • Page 20 End Plugged Figure 9: Barhole Probe An optional bar hole probe is available for the GX-2012. It is designed to be used when the GX-2012 is operated in Bar Hole Mode to check bar holes when tracking down underground gas pipe leaks (see “Chapter 4: Using the GX-2012 in Bar Hole Mode”...
  • Page 21 As you lower the probe down, if it hits water, it will float and continue to monitor the area. See the “Parts List” on page 145 for probe ordering information. GX-2012 Operator’s Manual Optional Accessories • 21 1.800.544.2843 www.calcert.com...

  • Page 22: Purge Tee Fitting

    Figure 13: Purge Tee Fitting External Dilution Fitting An external dilution fitting is available for the GX-2012. It is a 1:1 dilution fitting and is designed to mate with the inlet fitting and accept a sample hose or probe. The fittings are made with brass and nickel plated brass and are appropriate for use with the four standard gases.

  • Page 23: Chapter 3: Using The Gx-2012 In Normal Mode

    While in Normal Mode, Display Mode and Calibration Mode are accessible. If a standard version of the GX-2012 is ordered, it is shipped with Bar Hole Mode disabled so that the instrument only runs in Normal Mode when turned on.
  • Page 24 FAIL C--LIMIT The GX-2012 cannot be used until a calibration has been performed either by selecting AUTO CAL or ONE CAL in the Maintenance Mode menu. See “Calibrating Using Auto Calibration” on page 97 or “Calibrating Using Single Calibration”...
  • Page 25 If the unit is due for a bump test and BP EXPRD is set to NOT USE, then the following screen displays. FAIL B--LIMIT The GX-2012 cannot be used until a bump test has been performed by selecting BUMP in the Maintenance Mode menu. See “Performing a Bump Test” on page 102 for bump testing instructions. •...
  • Page 26 - - - - - - - - The Date/Time Screen appears for a few seconds. 2011 22:39 DATE This screen displays the current year, month, day, and time. 26 • Start Up, Normal Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 27 If the combustible channel is set up as %volume only using the HC Range Screen in Display Mode, it will automatically revert to Autoranging when it is turned off and on again and the no alarm acknowledgment screen will not appear. GX-2012 Operator’s Manual Start Up, Normal Mode • 27 1.800.544.2843 www.calcert.com...

  • Page 28: Turning On The Gx-2012 In Normal With All Modes Active

    L./B. MODE is OFF. See “Chapter 4: Using the GX-2012 in Bar Hole Mode” on page 69 for a description of Bar Hole Mode or “Chapter 5: Using the GX-2012 in Leak Check Mode” on page 78 for a description of Leak Check Mode.
  • Page 29 ENTER button and continue with the startup sequence as described in the previous section, “Turning On the GX-2012, Normal Mode Only”, from step 4 on page 23 on. NOTE: If no button is pressed for 20 seconds, the unit will proceed into whichever mode is displayed.

  • Page 30: Performing A Fresh Air Adjustment, Normal Mode

    Monitoring an Area 1. Start up the GX-2012 as described above in “Start Up, Normal Mode” on page 23 or “Turning On the GX-2012 in Normal Mode With All Modes Active”. It is now in Measuring Mode.

  • Page 31: Using Optional Probes And Fittings

    To use the 8 meter hose with floating probe: Start up the GX-2012 as described in “Start Up, Normal Mode” on page 23. 2. Connect the 8 meter hose with floating probe to the GX-2012’s quick connect inlet fitting.
  • Page 32 Since the fittings partially consist of unplated brass, they are not appropriate for detection of elevated levels of H Start up the GX-2012 as described in “Start Up, Normal Mode” on page 23. 2. Install the dilution fitting to the GX-2012’s quick connect inlet fitting.

  • Page 33: Combustible Gas Detection

    There are three important issues to keep in mind when monitoring for combustible gas. Applications with High Levels of Combustible Gas The GX-2012 provides the % LEL sensor with some protection by turning off the % LEL sensor power temporarily when it determines that a % LEL over scale (more than 100% LEL) concentration of combustible gas is present.

  • Page 34: Snap Log Mode

    1. Press and hold the (SHIFT) button, then press and hold the AIR button and hold both until you hear a beep. The unit will cycle through the following screens. 34 • Measuring Mode, Normal Operation GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com...
  • Page 35 POWER ENTER button to save a set of snap log data. The fourth screen GX-2012 Operator’s Manual Measuring Mode, Normal Operation • 35 1.800.544.2843...
  • Page 36 Normal Operation Screen. The data recorded in Snap Log Mode can be viewed in Display Mode. See “Snap Logging Screen” on page 53 for more information. 36 • Measuring Mode, Normal Operation GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 37: Measuring Mode, Alarms

    See “HC Range Screen” on page 44. The GX-2012 will sound an alarm, the unit will vibrate, and the LED arrays will flash when one of the target gas concentrations rises above the Warning level, or in the case of oxygen, falls below the Low Alarm setting for that gas.
  • Page 38 • FAIL appears at the Buzzer sounds a double bottom of the display pulsing tone (two pulses and the failed in quick succession) sensor(s) are indicated • Alarm LED arrays flash 38 • Measuring Mode, Alarms GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 39: Resetting And Silencing Alarms

    Silence Setting” on page 109). With ALRM SLNC ON and LATCHING ON: When the GX-2012 goes into a gas alarm, press the RESET SILENCE button to silence the buzzer. If the gas concentration was still above the alarm level when the button was pressed, the LEDs continue to flash, and the GX-2012 continues to display the current alarm level.

  • Page 40: Responding To Alarms

    The gas reading must fall below (or rise above for an oxygen low alarm) the low alarm setting before you can reset the alarm. Press the RESET SILENCE button to reset the alarm. The LEDs and buzzer turn off and the GX-2012 alarm indications on the display turn off.
  • Page 41 “Replacing or Recharging the Batteries” on page 134. The GX-2012 is fully functional during a low battery warning. However, only a limited amount of operating time remains, approximately 1 - 2 hours. The amount of time depends on how often the LCD backlight is used and how often the unit is responding to alarm conditions.

  • Page 42: Inert Mode

    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. Responding to Microprocessor Failure If your unit experiences a microprocessor failure, the heart symbol at the top of the screen will be steadily on or steadily off.

  • Page 43: Start Up And Operation

    Start Up and Operation 1. With the oxygen alarm pattern set to H-HH, start up the GX-2012 as described in “Turning On the GX-2012, Normal Mode Only” on page 23. Once the warm up sequence is complete, the Normal Operation Screen will display and INERT will appear along the bottom of the display.

  • Page 44: Hc Range Screen

    The lunch break feature enables the GX-2012 to remember peak readings when it is turned off so it can continue them when it is turned on again. See “Turning On the GX-2012, Normal Mode Only” on page 23. To reset the peak readings during operation, press and hold the RESET SILENCE button for a few seconds while in the peak screen.

  • Page 45: Stel Screen

    STEL (for CO and H S only), and TWA (for CO and H S only). The bottom line of the screen will alternate between ALARM--P, NO /DISP, and YES/ENT. dISP ALARM--P GX-2012 Operator’s Manual Display Mode • 45 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 46 Press the POWER ENTER button to proceed to view the full scale settings. Use the AIR or (SHIFT) buttons to scroll through screens showing the different settings. vol% %LEL 40.0 100.0 F. S. %LEL 19.5 WARNING %LEL 23.5 30.0 ALARM 15.0 STEL 46 • Display Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 47: Operation Time Screen

    The operation time screen displays the time in minutes since the GX-2012 was last turned on. The operation time may be continued from the last time the GX-2012 was in operation by using the lunch break option. See “Turning On the GX-2012, Normal Mode Only” on page 23.

  • Page 48: Remaining Log Time Screen

    The remaining log time screen displays the time remaining until the data logger memory is full. The remaining log time depends on how often the GX-2012 stores data to the data log, how many channels are active, and how often the GX-2012 is turned on and off.

  • Page 49: Clear Data Logger Screens

    The clear data logger screens allow you to clear the data logger storage. You can set the GX-2012 to overwrite the oldest data when the data log is full. See “Updating the Datalog Overwrite Setting” on page 118. The bottom line of the screen alternates between LG CLEAR, NO /DISP, and YES/ENT.

  • Page 50: Pump Off Screen

    Maintenance Mode is turned ON. The factory setting for POFF DSP is OFF. The GX-2012 pump can be turned on and off in this screen. The bottom line of this screen alternates between PUMP OFF, NO /DISP, and YES/ENT. This feature can be used to...

  • Page 51: User Id Screen

    The user ID is saved to the data logger for that session when you turn off the GX-2012 or change users during operation. This allows you to change the user ID during operation and have each user ID that was used during an operating session saved for the corresponding data.

  • Page 52: Station Id Screen

    The station ID is saved to the data logger for that session when you turn off the GX-2012 or change stations during operation. This allows you to change the station ID during operation and have each station ID that was used during an operating session saved for the corresponding data.

  • Page 53: Snap Logging Screen

    The ID number increases sequentially with each set of snap log data. Use the AIR and (SHIFT) buttons to scroll through different snap log IDs and view what time they were taken. GX-2012 Operator’s Manual Display Mode • 53 1.800.544.2843 www.calcert.com...

  • Page 54: Peak Bar Select Screen

    /DISP, and YES/ENT. BAR OFF To adjust the peak bar selection: Use the DISPLAY (ADJ) button to scroll to the Peak Bar Select Screen. The screen indicates the current setting. BAR ON 54 • Display Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 55: Datalogging

    NOTE: The GX-2012 logs data in both Normal Mode and Bar Hole Mode. The GX-2012 features the ability to log data to its internal memory and download it to a computer via the infrared communications port located just below the RESET SILENCE button.

  • Page 56: Calibration Mode

    The unit should be calibrated periodically. The optimum frequency of calibration depends heavily on how the GX-2012 is used. For example, instruments used daily may need to be calibrated weekly or monthly, while instruments that are used only a few times a year may need to be calibrated before each use.

  • Page 57: Calibrating The Gx-2012

    Continue to hold the AIR button until the display prompts you to release it. The GX-2012 will set the fresh air reading for all channels as it counts down from 8. If the combustible channel is set as %LEL only or vol% only, there is no countdown period.
  • Page 58 S, and CO sensors simultaneously. It is designed for use with the RKI 4-gas calibration cylinder and is the quickest and easiest method to calibrate the GX-2012. If installed, you may also calibrate the %volume sensor separately from the standard four.
  • Page 59 DISPLAY (ADJ) button. MAINTENANCE %LEL 20.9 AUTO CAL 14. Connect the tubing from the demand flow regulator to the rigid tube on the probe. Allow the gas to flow for one minute. GX-2012 Operator’s Manual Calibration Mode • 59 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 60 If any of the sensors cannot calibrate to the proper value, FAIL displays along the bottom of the screen and the GX-2012 lists the sensor(s) that failed to calibrate. In the example below, the OXY and H S channels failed calibration.
  • Page 61 % LEL sensor). If you have a 5 sensor unit, the %vol sensor will be one of the choices. It is shown below. MAINTENANCE vol% - - - ONE CAL GX-2012 Operator’s Manual Calibration Mode • 61 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 62 13. With the ONE CAL menu option displayed, press the (SHIFT) button until the NORMAL menu option is displayed. 14. Press and release the POWER ENTER button to return to Measuring Mode. 62 • Calibration Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 63: Bump Testing The Gx-2012

    BUMP menu item will not appear unless BUMP DSP is set to ON. See “Turning the Bump Test Function On or Off” on page 115 for instructions. NOTE: The GX-2012 uses parameters defined in the BUMP--SET menu item of Maintenance Mode while performing a bump test. To view or update these parameters, see “Updating the Bump Test Parameters”...
  • Page 64 Connect the tubing from the demand flow regulator to the rigid tube on the probe then quickly press and release the POWER ENTER button. The unit will begin counting down from 30. 64 • Calibration Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 65 If one or more sensors fail the bump test, see “Troubleshooting” on page 131 to investigate the cause of the failure and replace the failed sensor or sensors if necessary. • Disconnect the tubing from the probe. GX-2012 Operator’s Manual Calibration Mode • 65 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 66 AIR or (SHIFT) buttons. MAINTENANCE %LEL 12.0 23.0 BUMP • To return to the BUMP screen in Calibration Mode, press POWER ENTER. MAINTENANCE BUMP • Disconnect the tubing from the probe. 66 • Calibration Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 67 Use the AIR or (SHIFT) button to scroll between the calibration/bump test results, the bump test gas readings, and the calibration gas readings. MAINTENANCE %LEL BUMP/CAL MAINTENANCE %LEL 12.0 23.0 BUMP/ GX-2012 Operator’s Manual Calibration Mode • 67 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 68 13. With the BUMP menu option displayed, press the (SHIFT) button until the NORMAL menu option is displayed. 14. Press and release the POWER ENTER button to return to Measuring Mode. 68 • Calibration Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 69: Chapter 4: Using The Gx-2012 In Bar Hole Mode

    When the GX-2012 is in Bar Hole Mode, only the combustible and oxygen channels are displayed. If a GX-2012 is intended for bar hole testing, it is shipped with Bar Hole Mode enabled so that the operator must choose which operational mode to use when the unit is turned on.
  • Page 70 FAIL C--LIMIT The GX-2012 cannot be used until a calibration has been performed either by selecting AUTO CAL or ONE CAL in the Maintenance Mode menu. See “Calibrating Using Auto Calibration” on page 97 or “Calibrating Using Single Calibration”...
  • Page 71 FAIL B--LIMIT The GX-2012 cannot be used until a bump test has been performed by selecting BUMP in the Maintenance Mode menu. See “Performing a Bump Test” on page 102 for bump testing instructions. GX-2012 Operator’s Manual Start Up, Bar Hole Mode •...
  • Page 72 - - - - - - - - The Date/Time Screen appears for a few seconds. 2011 22:39 DATE This screen displays the current year, month, date, and time. 72 • Start Up, Bar Hole Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 73 Alarm setpoint (high gas alarm) for all channels • STEL alarm setpoint for the CO and H S channels • TWA alarm setpoint for the CO and H S channels GX-2012 Operator’s Manual Start Up, Bar Hole Mode • 73 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 74: Performing A Fresh Air Adjustment, Bar Hole Mode

    S sensor is installed and fails, press and release the RESET SILENCE button to acknowledge the failure and continue to Bar Hole Mode. 13. The GX-2012 is now operating in Bar Hole Mode. The pump is off and the following screen appears.

  • Page 75: Bar Hole Testing

    Bar Hole Mode also allows you to initiate an air purge cycle to purge gas from the GX-2012 after a sample is taken. In a low-light environment, press and release the (SHIFT) button to turn on the display backlight.
  • Page 76 PEAK PEAK If a high concentration of methane is encountered, a fresh air purge can be performed to purge the hose, probe and GX-2012 of gas before the next bar hole test. To perform a purge, do the following: •...

  • Page 77: Turning Off The Gx-2012, Bar Hole Mode

    10. To exit Bar Hole Mode and return to the Mode Select Screen at any time, press and hold the (SHIFT) button for 5 seconds. Turning Off the GX-2012, Bar Hole Mode 1. Press and hold the POWER ENTER button.

  • Page 78: Chapter 5: Using The Gx-2012 In Leak Check Mode

    28). Start Up, Leak Check Mode This section explains how to start up the GX-2012 in Leak Check Mode and get it ready for operation. NOTE: The battery drain is higher in Leak Check Mode than in Normal Mode or Bar Hole Mode.
  • Page 79 ENTER button to begin the Leak Check Mode startup sequence. NOTE: If no button is pressed for 20 seconds, the unit will proceed into whichever mode is displayed. GX-2012 Operator’s Manual Start Up, Leak Check Mode • 79 1.800.544.2843 www.calcert.com...
  • Page 80 FAIL C--LIMIT The GX-2012 cannot be used until a calibration has been performed either by selecting AUTO CAL, or ONE CAL in the Maintenance Mode menu. See “Calibrating Using Auto Calibration” on page 97 or “Calibrating Using Single Calibration”...
  • Page 81 FAIL B--LIMIT The GX-2012 cannot be used until a bump test has been performed by selecting BUMP in the Maintenance Mode menu. See “Performing a Bump Test” on page 102 for bump testing instructions. If a bump test is not due or BP EXPRD is set to NO EFFECT, then the following •...
  • Page 82 - - - - - - - - 9. The Date/Time Screen appears for a few seconds. 2011 22:39 DATE This screen displays the current year, month, date, and time. 82 • Start Up, Leak Check Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 83 11. The display then indicates the full scale values for all channels. 12. If the GX-2012 experiences a sensor failure during start up, a screen indicating which sensor failed displays. In the example below, the catalytic LEL sensor has failed.

  • Page 84: Performing A Fresh Air Adjustment, Leak Check Mode

    The combustible gas reading is displayed along with the battery charge level. Performing a Fresh Air Adjustment, Leak Check Mode Before using the GX-2012 for leak checking, it is recommended to set the fresh air reading by performing a fresh air adjustment. This will set the combustible gas channel to zero.

  • Page 85: Leak Testing

    5 minutes to confirm that it’s operating. Setting the Display Range Value The GX-2012 Leak Check Mode has 4 display range ppm values to choose from: 500 ppm, 1000 ppm, 2000 ppm, and 5000 ppm. NOTE: The GX-2012 is always detecting combustible gas up to 5000 ppm. The display range value is only adjusting what part of the detection range is displayed on the LCD.

  • Page 86: Overscale Conditions

    5000 ppm. • Exceeding 5000 ppm If the combustible gas level exceeds 5000 ppm, the GX-2012 will display an overscale condition but will continue displaying the gas reading in %LEL. LEAK CK MODE...

  • Page 87: Turning The Alarm On And Off In Leak Check Mode

    Turning the Alarm On and Off in Leak Check Mode The alarm buzzer can be turned off and on when the GX-2012 is in Leak Check Mode. This setting only applies to Leak Check Mode and does not affect buzzer operation in Normal or Bar Hole Mode.

  • Page 88: Snap Log Mode, Leak Check Mode Operation

    To enter Snap Log Mode and record snap log data: 1. Turn the GX-2012 on as described in “Turning On the GX-2012, Leak Check Mode” on page 78. Select the desired display range. In the example below, 500 ppm has been selected.
  • Page 89 Normal Operation Screen. 8. The data recorded in Snap Log Mode can be viewed in Display Mode. See “Snap Logging Screen” on page 53 for more information. GX-2012 Operator’s Manual Leak Testing • 89 1.800.544.2843 www.calcert.com...

  • Page 90: Viewing Snap Log Data In Leak Check Mode Operation

    Snap log data can be viewed while in Leak Check Mode. If snap log data was taken while in Normal Operation, that data will also appear. 1. Turn the GX-2012 on as described in “Turning On the GX-2012, Leak Check Mode” on page 78.
  • Page 91 LEAK CK MODE LEAK CK MODE 2012 Leak Check POWER Mode Operation ENTER Base Data 14:17 5000 AIR M009 VALVE 3 (SHIFT) 2011 %LEL Normal POWER 22.0 Operation ENTER Data 22:39 M007 GX-2012 Operator’s Manual Leak Testing • 91 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 92: Turning Off The Gx-2012, Leak Check Mode

    6. To exit snap log data viewing and return to Leak Check Mode Operation, press and release the DISPLAY (ADJ) button. Turning Off the GX-2012, Leak Check Mode 1. Press and hold the POWER ENTER button. 2. The buzzer will pulse for about three seconds and TURN OFF will appear at the bottom of the screen.

  • Page 93: Chapter 6: Maintenance Mode

    Chapter 6: Maintenance Mode Overview This chapter describes the GX-2012 in Maintenance Mode. In Maintenance Mode, you can: • update the date and time • perform a fresh air adjust • perform an auto calibration • perform a single calibration •...

  • Page 94: Tips For Using Maintenance Mode

    Mode. Although it will respond to gas in parts of AUTO CAL and ONE CAL, there are no alarm indications. 1. Take the GX-2012 to a non-hazardous location, and turn it off if it is on. Press and hold the AIR and (SHIFT) buttons, then press and hold the POWER ENTER button.

  • Page 95: Updating The Date And Time Settings

    Press and release the POWER ENTER button. The date and time will be displayed with the year flashing. MAINTENANCE 2011 22:37 DATE Use the AIR or (SHIFT) button to display the desired year. GX-2012 Operator’s Manual Using Maintenance Mode • 95 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 96: Performing A Fresh Air Adjustment

    3. Press and release the POWER ENTER button to enter AIR CAL. The current gas readings are displayed. MAINTENANCE %LEL 20.9 PUSH AIR Hold down the AIR button. The unit will prompt you to continue holding the AIR button. MAINTENANCE HOLD AIR 96 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 97: Calibrating Using Auto Calibration

    2. Install the demand flow regulator onto the calibration cylinder. Connect the sample tubing to the demand flow regulator. 4. Install the hose and probe to the GX-2012. You may only calibrate either the standard 4 sensors or the % volume combustible gas sensor at a time.
  • Page 98 NOTE: The RKI Four Gas Cylinder typically contains 12% O by volume. Be sure to set the “OXY” reading to agree with the concentration listed on the cylinder’s label, not zero. 98 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 99 If any of the sensors cannot calibrate to the proper value, FAIL displays along the bottom of the screen and the GX-2012 lists the sensor(s) that failed to calibrate. In the example below, the OXY and H S channels failed calibration.

  • Page 100: Calibration Using Single Calibration

    Calibration cylinders that contain only one target gas may also be used for single calibration. For channels other than oxygen, RKI Instruments, Inc. recommends that you use a cylinder that contains a concentration of 10-50% of the full scale value of the target gas.
  • Page 101 12. Disconnect the tubing from the probe. 13. Repeat steps 2 through 12 for any other sensors you want to calibrate. Make sure you use an appropriate calibration cylinder for each sensor. GX-2012 Operator’s Manual Using Maintenance Mode • 101 1.800.544.2843 www.calcert.com...

  • Page 102: Performing A Bump Test

    BUMP menu item will not appear unless BUMP DSP is set to ON. See “Turning the Bump Test Function On or Off” on page 115 for instructions. NOTE: The GX-2012 uses parameters defined in the BUMP--SET menu item of Maintenance Mode while performing a bump test. To view or update these parameters, see “Updating the Bump Test Parameters”...
  • Page 103 10. Connect the tubing from the demand flow regulator to the rigid tube on the probe and quickly press and release the POWER ENTER button. The unit will begin counting down from 30. GX-2012 Operator’s Manual Using Maintenance Mode • 103 1.800.544.2843 www.calcert.com...
  • Page 104 If one or more sensors fail the bump test, see “Troubleshooting” on page 131 to investigate the cause of the failure and replace the failed sensor or sensors if necessary. • Disconnect the tubing from the probe. 104 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 105 AIR or (SHIFT) button. MAINTENANCE %LEL 12.0 23.0 BUMP • To return to the main menu, press POWER ENTER. MAINTENANCE BUMP • Disconnect the tubing from the probe. GX-2012 Operator’s Manual Using Maintenance Mode • 105 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 106 Use the AIR or (SHIFT) button to scroll between the calibration/bump test results, the bump test gas readings, and the calibration gas readings. MAINTENANCE %LEL BUMP/CAL MAINTENANCE %LEL 12.0 23.0 BUMP/ 106 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 107: Turning The Lunch Break Setting On Or Off

    With LNCH BRK set to ON, the Resume Measurements Screen displays during startup. From this screen, you can choose to continue accumulating TWA and PEAK readings and the time in operation from the last time the GX-2012 was used or start collecting new readings and reset the time in operation.

  • Page 108: Updating The Alarm Latching Settings

    With LATCHING set to ON (factory setting), the GX-2012 remains in alarm condition until the alarm condition passes and the POWER ENTER button is pressed. With LATCHING set to OFF, the GX-2012 automatically resets an alarm when the alarm condition passes.

  • Page 109: Updating The Alarm Silence Settings

    With ALM SLNC set to ON (factory setting), pressing and releasing the RESET SILENCE button silences the buzzer when the GX-2012 is in alarm. The LEDs continue to flash and the display continues to show the alarm. If the alarms are set up as latching, when the gas concentration falls below the alarm level, pressing and releasing the RESET SILENCE button clears all alarm indications for that alarm.

  • Page 110: Updating The Data Logging Interval

    Updating the Data Log Interval Setting This setting indicates how often the GX-2012 saves readings to the data logger. The following interval times can be selected: 6 minutes, 5 minutes, 3 minutes, 1 minute, 30 seconds, 20 seconds, or 10 seconds. The factory setting is 5 minutes (300 seconds).
  • Page 111 5. Press POWER ENTER to save the setting. The alarm setting for the combustible gas channel will then be displayed. MAINTENANCE %LEL ALARM Use the AIR or (SHIFT) buttons to change the alarm setting. GX-2012 Operator’s Manual Using Maintenance Mode • 111 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 112 11. Adjust the values for the warning and alarm settings using the procedure in step 4 through step 7. When you press POWER ENTER after selecting the alarm value, you will then be prompted to select the STEL value. MAINTENANCE STEL 112 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 113 STEL 15. Use the AIR or (SHIFT) buttons to change the setting and press POWER ENTER when finished. You will then be asked to enter a TWA value. MAINTENANCE GX-2012 Operator’s Manual Using Maintenance Mode • 113 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 114: Turning The Clear Data Logger Screen On Or Off

    Use the AIR or (SHIFT) button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu. 114 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 115: Turning The Bump Test Function On Or Off

    Display Mode and the user cannot turn the pump off. WARNING: The GX-2012 is not a gas monitoring device if the pump is turned off. Use the AIR or (SHIFT) buttons to display the POFF DSP menu item.

  • Page 116: Updating The Bump Test Parameters

    The time increments are 30, 45, 60, and 90 seconds. Once a value is selected, press and release the POWER ENTER 116 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com...

  • Page 117: Updating The Confirmation Beep Setting

    POWER ENTER button. Updating the Confirmation Beep Setting With BEEP. SET set to ON, the GX-2012 beeps once every 5 minutes to verify that it is operating. With BEEP. SET set to OFF (factory setting), the GX-2012 does not sound a confirmation beep.

  • Page 118: Updating The Datalog Overwrite Setting

    With OVER WRT set to ON (factory setting), the GX-2012 writes over the oldest data with new data when the data logger memory is full. With OVER WRT set to OFF, the GX-2012 stops saving data to the data logger when the data logger memory is full.

  • Page 119: Updating The Calibration Reminder Setting

    SILENCE button to continue. With CL EXPRD set to NOT USE, if the unit is due for calibration the GX-2012 will give an indication at start up that calibration is due and the unit cannot be used until it is calibrated.

  • Page 120: Updating The Calibration Check Setting

    Press and hold the AIR or (SHIFT) button to rapidly scroll through the settings. 3. Press and release the POWER ENTER button to save the setting and return to the main menu. 120 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 121: Updating The Bump Test Reminder Setting

    Updating the Bump Test Reminder Setting With BP RMNDR set to ON, the GX-2012 will give an indication at start up if it is due for bump testing. The type of indication will depend on the BP EXPRD setting (see below).

  • Page 122: Updating The Bump Test Check Setting

    Use the AIR or (SHIFT) button to display the desired setting. 3. Press and release the POWER ENTER button to save the setting and return to the main menu. 122 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 123: Turning The Id Display Function On Or Off

    BCK LGHT Use the AIR and (SHIFT) buttons to display the desired setting. 3. Press and release the POWER ENTER button to save the setting and return to the main menu. GX-2012 Operator’s Manual Using Maintenance Mode • 123 1.800.544.2843 www.calcert.com...

  • Page 124: Updating The Autozero Function

    Updating the Autozero Function With AUTO.ZERO turned ON, the GX-2012 will automatically perform a fresh air adjust when it is turned on. With the AUTO.ZERO function turned OFF (factory setting), this does not occur. WARNING: If you turn on the autozero function, you must ensure that the unit is in a fresh air environment when it is turned on.

  • Page 125: Updating The Leak Check/Bar Hole Mode Setting

    With L./B. MODE set to LC bH, you will be prompted to choose between Normal Mode, Bar Hole Mode, and Leak Check Mode when the GX-2012 is turned on. Use the AIR or (SHIFT) buttons to display the L./B. MODE menu item.

  • Page 126: Updating The Bar Hole Sampling Time

    Updating the Bar Hole Sampling Time The Bar Hole Sampling Time is the amount of time that the GX-2012 samples a bar hole when being used in Bar Hole Mode. The 3 selections are 30, 45, and 60 seconds. The factory setting is 30 seconds.

  • Page 127: Updating The Leak Check Mode Co Channel Display Setting

    3. Use the AIR or (SHIFT) button to display the desired setting. 4. Press and release the POWER ENTER button to save the setting and return to the main menu. GX-2012 Operator’s Manual Using Maintenance Mode • 127 1.800.544.2843 www.calcert.com...

  • Page 128: Viewing The Rom/Sum Information

    2. Press POWER ENTER again to return to the ROM/SUM menu screen. Turning the Password Function On or Off With PASSWORD set to ON, the GX-2012 prompts you for a password when you enter Calibration Mode. With PASSWORD set to OFF (factory setting), no password is required to enter Calibration Mode.

  • Page 129: Performing A Low Flow Setpoint Adjustment

    Use the AIR or (SHIFT) buttons to get a reading of approximately 1500 on the bottom value. When you have adjusted the value as close as you can, press and release the POWER ENTER button. GX-2012 Operator’s Manual Using Maintenance Mode • 129 1.800.544.2843 www.calcert.com...

  • Page 130: Exiting Maintenance Mode

    Use the AIR or (SHIFT) buttons to display the START menu item. Press and release the POWER ENTER button. The unit will exit Maintenance Mode and begin its start up sequence. 130 • Using Maintenance Mode GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 131: Chapter 7: Maintenance

    Chapter 7: GX-2012 Maintenance Overview This chapter describes troubleshooting procedures for the GX-2012. It also includes procedures for recharging the battery pack (rechargeable version), replacing the alkaline batteries (alkaline version), 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 132 Table 8: Troubleshooting the GX-2012 Probable Symptoms Recommended Action Causes • Display indicates • An internal clock 1. Enter normal operation by pressing and releasing the “FAIL CLOCK” failure has RESET SILENCE button to during startup. occurred use the unit temporarily.
  • Page 133 1. Check all calibration tubing for leaks or for any bad fails or unable to calibration values connections. set the response may not match 2. Make sure the GX-2012 has readings during the cylinder gas been properly set up for single calibration. concentrations calibration.

  • Page 134: Replacing Or Recharging The Batteries

    Replacing Alkaline Batteries 1. Turn off the GX-2012. WARNING: Do not remove the batteries while the GX-2012 is on. Turn the battery cover release knob counterclockwise, remove the battery cover, and lay it aside. 3. Carefully remove the old alkaline batteries. Verify that the battery compartment and electrical contacts are clean.

  • Page 135: Replacing The Lithium Ion Battery Pack

    1. Turn off the GX-2012. WARNING: Do not remove the battery pack while the GX-2012 is on. Push the latch on the bottom of the GX-2012 toward the front of the instrument to release the battery pack. Slide Latch This Way Figure 19: Releasing the Battery Pack 3.

  • Page 136: Recharging The Lithium Ion Battery Pack In The Instrument

    RKI charger model BC-2012, p/n 49-2180RK, or RKI charger model BC-2012DC, p/n 49-2181RK. Use of other rechargeable batteries or chargers or charging of other rechargeable batteries in the GX-2012 will void the warranty. Make sure the GX-2012 is off.
  • Page 137 One adapter will not operate more than one charging station. 4. Place the GX-2012 into the battery charging station as shown in Figure 23 below so that the metal contacts on the back of the unit come into contact with the metal contacts on the back of the holder in the charging station.

  • Page 138: Recharging The Lithium Ion Battery Pack Out Of The Instrument

    The lithium ion battery pack may be charged using the charging station while it is out of the GX-2012. This is useful if spare battery packs are kept in case the pack in the GX- 2012 needs to be charged, but the unit must be used immediately. In this case, a spare charged pack can be installed in the GX-2012 and the dead pack charged in the charging station.
  • Page 139 If using an AC powered charging station, plug the AC adapter into an electrical outlet. AC Power Supply Power Supply Jack To AC Outlet Charge LED AC Powered Charging Station Figure 24: Connecting the Charging Station’s AC Adapter GX-2012 Operator’s Manual Replacing or Recharging the Batteries • 139 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 140 The construction of the charging stations allows them to be chained together but a separate adapter must be used for each charging station. One adapter will not operate more than one charging station. 140 • Replacing or Recharging the Batteries GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 141: Replacing The Lel And Co Filters

    S filter disk will have to be replaced more frequently. 1. Verify that the GX-2012 is off. Use a screwdriver to remove the three screws holding the belt clip to the back side of the instrument. Two of these screws also secure the flow chamber.

  • Page 142: Replacing A Sensor

    9. Place the belt clip into position and tighten the three screws retaining it. Replacing a Sensor 1. Verify that the GX-2012 is off. Use a screwdriver to remove the three screws holding the belt clip to the back side of the instrument.
  • Page 143 12. Place the belt clip into position and tighten the three screws retaining it. 13. Start up the GX-2012 by pressing and briefly holding the POWER ENTER button. 14. Calibrate the new sensor as described in “Calibration Mode” on page 56.

  • Page 144: Replacing The Hydrophobic Disk Filter, Cotton Filter

    Cotton Filter, and Wire Mesh Disk 1. Verify that the GX-2012 is off. 2. Locate the clear plastic filter holder at the top of the GX-2012. 3. Grasp the filter holder and turn it 1/4 turn counterclockwise. Pull the filter holder away from the case. Inspect the cotton dust filter and replace if dirty.

  • Page 145: Parts List

    Parts List Table 7 lists part numbers for the GX-2012’s replacement parts and accessories. Table 9: Parts List Part Number Description 06-1248RK-03 Calibration kit tubing, 3 foot length 07-2005RK Gasket, filter/screen retaining 13-0112RK Wrist strap 17-1001RK Tapered rubber nozzle 17-4430RK-01...
  • Page 146 Operator’s Manual, GX-2012 Data Logger Management Program 80-0009RK-XX Sample hose. Replace “XX” with length in feet. Available lengths for the GX-2012 are 2, 3, 10, 15, 20, 25, 30, 40, and 50 feet. 80-0101RK 8 meter hose with floating head 80-0140RK 32”...
  • Page 147 (cylinders with external threads) 83-0007RK Downloading software ES-1821 Carbon monoxide sensor ES-1827i Hydrogen sulfide sensor NC-6264A % LEL/ppm combustibles sensor OS-BM2 Oxygen sensor TE-7561 TC %volume combustibles sensor GX-2012 Operator’s Manual Parts List • 147 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 148: Appendix A: Calibrating And Bump Testing With A Sample Bag

    The GX-2012 can be calibrated and bump tested with a gas bag calibration kit instead of a demand flow regulator kit. Appendix A describes how to use a sample bag calibration kit to calibrate and bump test the GX-2012. A parts list at the end of this appendix lists spare parts for the calibration kit.

  • Page 149: Preparing For Calibration Or Bump Testing

    Continue to hold the AIR button until the display prompts you to release it. The GX-2012 will count down from 8 as it sets the fresh air reading for all channels. If the combustible channel is set as %LEL only or vol% only, there is no countdown period.

  • Page 150: Calibrating The Gx-2012

    Calibration Mode. MAINTENANCE will appear along the top of the screen once you have entered Calibration Mode. The first item in the calibration menu, AIR CAL, displays. 150 • Calibrating the GX-2012 GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com...

  • Page 151: Calibrating With The Auto Calibration Method

    NOTE: The following screens illustrate a four-gas GX-2012 with both a % LEL and a % volume combustible sensor as examples only. Your GX-2012 may display slightly different screens. MAINTENANCE AIR CAL The GX-2012’s calibration menu includes two methods of calibration: auto calibration and single calibration.
  • Page 152 NOTE: The RKI Four Gas Cylinder typically contains 12% O by volume. Be sure to set the “OXY” reading to agree with the concentration listed on the cylinder’s label, not zero. 152 • Calibrating the GX-2012 GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com...
  • Page 153 If any of the sensors cannot calibrate to the proper value, FAIL displays along the bottom of the screen and the GX-2012 lists the sensor(s) that failed to calibrate. In the example below, the OXY and H S channels failed calibration.

  • Page 154: Calibrating With The Single Calibration Method

    Calibration cylinders that contain only one target gas may also be used for single calibration. For channels other than oxygen, RKI Instruments, Inc. recommends that you use a cylinder that contains a concentration of 10-50% of the full scale value of the target gas.
  • Page 155 If the reading already matches the concentration listed on the calibration cylinder, press and release the AIR button then press and release the (SHIFT) button so that the instrument sees a change and resets the calibration date. GX-2012 Operator’s Manual Calibrating the GX-2012 • 155 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 156 MAINTENANCE ONE CAL 8. Disconnect the tubing from the GX-2012’s probe. 9. Repeat steps 3 through 8 for any other sensors you want to calibrate. Make sure you use an appropriate calibration cylinder for each sensor.

  • Page 157: Bump Testing

    BUMP menu item will not appear unless BUMP DSP is set to ON. See “Turning the Bump Test Function On or Off” on page 115 for instructions. NOTE: The GX-2012 uses parameters defined in the BUMP--SET menu item of Maintenance Mode while performing a bump test. To view or update these parameters, see “Updating the Bump Test Parameters”...
  • Page 158 6. Disconnect the tubing from the regulator or dispensing valve. 7. Install the hose and probe to the GX-2012. Use the AIR or (SHIFT) buttons to display the BUMP menu item. MAINTENANCE BUMP 9.
  • Page 159 If one or more sensors fail the bump test, see “Troubleshooting” on page 131 to investigate the cause of the failure and replace the failed sensor or sensors if necessary. • Disconnect the tubing from the probe. GX-2012 Operator’s Manual Bump Testing • 159 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 160 AIR or (SHIFT) buttons. MAINTENANCE %LEL 12.0 23.0 BUMP • To return to the BUMP screen in Calibration Mode, press POWER ENTER. MAINTENANCE BUMP • Disconnect the tubing from the probe. 160 • Bump Testing GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 161 Use the AIR or (SHIFT) buttons to scroll between the calibration/bump test results, the bump test gas readings, and the calibration gas readings. MAINTENANCE %LEL BUMP/CAL MAINTENANCE %LEL 12.0 23.0 BUMP/ GX-2012 Operator’s Manual Bump Testing • 161 1.800.544.2843 www.calcert.com sales@calcert.com...
  • Page 162 16. With the BUMP menu option displayed, press the (SHIFT) button until the NORMAL menu option is displayed. 17. Press and release the POWER ENTER button to return to Measuring Mode. 162 • Bump Testing GX-2012 Operator’s Manual 1.800.544.2843 www.calcert.com sales@calcert.com...

  • Page 163: Parts List

    Calibration kit with sample bag, for LEL/Oxy/H2S/CO unit, 34 liter aluminum 81-GX03VCO-LV Calibration kit with sample bag, for %VOL(CH4)/LEL/Oxy/CO unit, 34 liter steel 81-GX03VHSCO-LV Calibration kit with sample bag, for %VOL(CH4)/LEL/Oxy/H2S/CO unit, 34 liter aluminum GX-2012 Operator’s Manual Parts List • 163 1.800.544.2843 www.calcert.com sales@calcert.com...

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