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RKI Instruments GX-2012 Quick Reference Manual

Confined space multi gas monitor
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Gas Detection For Life
With the GX-2012, you have multiple tools in one instrument. Having 3 operating modes, the GX-2012 can be used for confined
space, safety monitoring in it's Normal Operating mode; for leak investigation in Leak Check mode; and for underground leak
checking in Bar Hole mode. When equipped with an optional TC sensor, the GX-2012 can measure 100% volume methane
and dynamically auto range from % LEL to % volume. This is ideal for line purge testing.
Built around high-quality micro-sensor technology, the GX-2012 is RKI's smallest personal 1-5 sensor gas monitor with a built
in sample pump. Weighing only 12.3 ounces, the GX-2012 can monitor the standard confined space gases (LEL combustibles,
Oxygen content, Carbon Monoxide, and Hydrogen Sulfide).
The GX-2012's large LCD display shows all gas readings, battery level, current time, and will automatically backlight in alarm
conditions. Standard alarm types include vibration, visual, and audible alarms, which can be set to latching or non-latching.
Controlled by a microprocessor, the GX-2012 continuously checks itself for sensor connections, low battery, circuit trouble, low
flow, and calibration errors. The GX-2012 can interchangeably operate on either a Li-ion battery pack or an alkaline battery
pack. The batteries are simple to replace requiring no tools to access the removable battery compartment or pack.
Calibration and bump test intervals and reminders are user adjustable and can be set to either go into alarm or to lock the
user out of normal measurement mode once a calibration period has expired. Calibrations can be performed automatically
or individually in single calibration mode. The GX-2012 is also compatible with the economical SDM-2012 single channel
calibration station.
RKI Instruments, Inc.
33248 Central Ave. Union City, CA 94587
Confined SpaCe multi gaS monitor
Mode
Normal Operating
Leak Check Mode
Bar Hole Mode
World Leader In Gas Detection & Sensor Technology
www.rkiinstruments.com
Features
• Monitors ppm LEL, and % volume methane,
O2, CO and H2S
• 0 to 100% volume methane option
• Auto-ranging display of % LEL and % volume
3 Operating modes: Normal, leak check, & bar hole
• Leak check mode:
○ PPM leak detector, detects down to 100 ppm CH4
○ Adjustable display ranges: 500/1000/2000/5000 ppm
○ Visual / audible pulses change with gas concentration
○ CO display in leak check mode, ideal for residential investigations
• Barhole test mode for underground leak checks
• Status indicators: Pump active, microprocessor status and
battery level
• Internal sample drawing pump with up to 50 foot range
• Vibration, visual, and audible alarms
• Automatic backlight during alarms
• Bump test and calibration reminder with lock out option
• Lithium ion or alkaline battery packs (interchangeable)
• Alarm latching or non-latching
• High impact, dust and water resistant design
• Up to 600 hours of datalogging with alarm trends
• Snap-logging - on demand data recording
• TWA and STEL readings with lunch-break mode
• Intrinsically safe, ATEX/IECEx/CE or CSA/CE (Optional)
• 2 year warranty
Phone (800) 754-5165
PO30-1409/1000
GX-2012 Model
(510) 441-5656
Fax (510) 441-5650

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Summary of Contents for RKI Instruments GX-2012

  • Page 1 The GX-2012’s large LCD display shows all gas readings, battery level, current time, and will automatically backlight in alarm conditions. Standard alarm types include vibration, visual, and audible alarms, which can be set to latching or non-latching. Controlled by a microprocessor, the GX-2012 continuously checks itself for sensor connections, low battery, circuit trouble, low flow, and calibration errors. The GX-2012 can interchangeably operate on either a Li-ion battery pack or an alkaline battery pack. The batteries are simple to replace requiring no tools to access the removable battery compartment or pack. Calibration and bump test intervals and reminders are user adjustable and can be set to either go into alarm or to lock the user out of normal measurement mode once a calibration period has expired. Calibrations can be performed automatically or individually in single calibration mode. The GX-2012 is also compatible with the economical SDM-2012 single channel calibration station. RKI Instruments, Inc. • 33248 Central Ave. Union City, CA 94587 • Phone (800) 754-5165 •...
  • Page 2 GX-2012 Model % Volume Hydrogen Sulfide Carbon Monoxide Combustible Gases Gas Detected Oxygen (O2) (Methane as standard) Methane (H2S) (CO) Detection Catalytic combustion Thermal conductivity Galvanic cell Electrochemical cell Principle 0 ~ 100% LEL Detection Range 0 ~ 500 / 1,000 / 0 ~ 100% Vol. 0 ~ 40% Vol. 0 ~ 100 ppm 0 ~ 500 ppm 2,000 / 5,000 ppm Accuracy ± 5% of reading or Statement ± 5% of reading or ± 5% of reading or ± 5% of reading ± 2% LEL ± 0.5% O2 (whichever is ± 2% of full scale ± 2 ppm H2S or ± 5 ppm CO...
  • Page 3 Quick Reference Guide For Model GX-2012 Note: Turn on and adjust the GX-2012 gas monitor in a known fresh air area. 1. Turning the GX-2012 ON Note: This start up sequence assumes the following maintenance mode items are turned on: LNCH BRK, ID DISP, CL RMNDR, and BP RMNDR Set to CONFIRM a. Attach the rubber nozzle or sample hose to the GX-2012’s...
  • Page 4 Quick Reference Guide For Model GX-2012 3. Performing a Fresh Air Adjustment a. Performing a Fresh Air Adjustment will set the CH4, CO, and H2S channels to 0 and the OXY channel to 20.9%. b. Take the instrument to a fresh air area where the air is free of toxic or combustible gas and has normal oxygen (20.9%). c. Press and hold the AIR button. The display will prompt you to continue holding the AIR button. d. The display will prompt you to release the AIR button. The GX-2012 will automatically set the fresh air readings for all channels. e. The GX-2012 is now ready for use. Note: If fresh air adjustment fails, refer to user’s manual. 4. Flow Integrity Test a. Place finger over end of probe or rubber tip. The GX-2012 should go into flow fail in a few seconds. b. Press the RESET SILENCE button to restart the pump. c. If the instrument fails to indicate flow failure, check probe and hose connections for leaks. 5. Breath Test (for instruments equipped with oxygen sensor) a. If connected, remove hose and probe. b. Exhale near the inlet fitting of the unit. Observe that the oxygen reading drops below the alarm setting of 19.5% and the audible and visual alarms are activated. c. Press the RESET SILENCE button to reset the alarms the reconnect hose and probe. 6. Turning the GX-2012 OFF Press and hold the POWER ENTER button until TURN OFF has disappeared from the bottom of the screen. The GX-2012 is now off.
  • Page 5 Sensor gasket, GX-2012 / Gas Tracer 33-7114RK Filter disk, H2S scrubber, 5 pack, for combustible diffusion port 33-7102RK Filter, charcoal, for CO sensor, pack of 5 GX-2009 / GX-2012 / Gas Tracer / GX-2001 21-1892RK Sensor cap assembly, GX-2012 13-0118RK...
  • Page 6 GX-2012 Spare Parts 10000363 ISO 9001 Toll Free: (800) 754-5165 • Phone: (510) 441-5656 www.rkiinstruments.com Fax: (510) 441-5650 •...
  • Page 7 8/16/19 GX-2012 Service Training Module •  w ww.rkiinstruments.com Scope •  Calibration –  Auto/Single Cal •  Maintenance –  Inlet filter/Battery replacement –  Scrubber/Sensor Replacement –  Internal component replacement •  Modes –  Display/Maintenance/Factory •  Low Flow Adjustment •  Common troubleshooting techniques...
  • Page 8 –  If your unit is a 5-gas unit, you will require the 4-gas mix AND a 100%vol or 50%vol cylinder 3.  Tubing To go from regulator to GX-2012 inlet •  w ww.rkiinstruments.com Auto Calibration Mode •  Enter Calibration Mode –  From Normal Operation press and hold the (SHIFT)▼button, then press the DISPLAY(ADJ)
  • Page 9 8/16/19 PASSWORD To return to normal operation, press and release the RESET SILENCE button. You may then try to reenter 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.
  • Page 10 8/16/19 Auto Calibration Mode If concentrations do not match, continue with the following: •  To adjust the values on the screen, hold down the (SHIFT)▼ button, then press the DISPLAY(ADJ) button and release both. –  The value for the combustible gas channel begin to flash.
  • Page 11 8/16/19 Auto Calibration Mode •  Repeat steps above to set the correct values for the remaining channels. Use the ▲AIR button to scroll through the different channels. After the last channel is set, use the ▲AIR button to scroll to ESCAPE and press ENTER. • ...
  • Page 12 •  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. The buzzer and alarm lights activate. –  Press and release the RESET SILENCE button to reset the alarm and return to the calibration menu.
  • Page 13 8/16/19 Auto Calibration Mode •  Disconnect the tubing from the inlet fitting of the unit. •  Unscrew the demand flow regulator from the calibration cylinder. •  If you have a 5 sensor unit and wish to calibrate the % volume sensor, go back to the first step and repeat the process.
  • Page 14 8/16/19 Single Calibration Mode •  Use the ▲AIR or (SHIFT)▼ button to display the channel you want to calibrate (in this example the combustible gas % LEL sensor). If you have a 5 sensor unit, pressing the ▲AIR button will display %vol and allow you to calibrate that sensor.
  • Page 15 8/16/19 Single Calibration Mode •  If necessary, use the ▲AIR and (SHIFT)▼ buttons to adjust the reading to match the concentration listed on the calibration cylinder. •  Press and release the POWER ENTER button to save the span value. The LCD will indicate that the calibration has ended, then will return to the ONE CAL screen.
  • Page 16 8/16/19 Single Calibration Mode •  With the ONE CAL menu option displayed, press the (SHIFT)▼ button until the NORMAL menu option is displayed. •  Press and release the POWER ENTER button to return to Measuring Mode. •  w ww.rkiinstruments.com •  1 9...
  • Page 17 8/16/19 Alarm Types and Indications !"#$%&'()* +,-.#"&/01,2#3,40- 536*$&/01,2#3,40- !"#$%&'()$ *%+,-,.$'//0'(1$20&"#$340$5'1$&613 =@EE0($1"@871$'&30(8'3685$203#008$'$&"#$ '87$4654$/63>4 +0'7685$9"($340$5'1$68$'&'()$9&'1401 HI"8>083('36"8$"9$5'1$(6101$ '2"K0$340$*'(8685$&0K0&M$"($ %&'()$!:;$'(('<1$9&'14 9'&&1$20&"#$340$!"#$%&'()$&0K0&$ G62('3"($/@&101 9"($FJL ='>?&6543$3@(81$"8 =@EE0($1"@871$'&30(8'3685$203#008$'$&"#$ A654$%&'() %!%+B$'//0'(1$20&"#$340$5'1$&613 '87$4654$/63>4$9'130($34'8$#'(8685$ +0'7685$9"($340$5'1$68$'&'()$9&'1401 6876>'36"8 HI"8>083('36"8$"9$5'1$(6101$ 'K">0$340$%&'()$&0K0&M$"($(6101$ %&'()$!:;1$9&'14$9'130($34'8$#'(8685$ G62('3"($/@&101$9'130($34'8$#'(8685$ '2"K0$340$A654$%&'()$&0K0&$9"($ 6876>'36"8 6876>'36"8 ='>?&6543$3@(81$"8 =@EE0($1"@871$'&30(8'3685$203#008$'$&"#$ C*%$"9$DC:! C*%$"($DC:!$'//0'(1$20&"#$340$5'1$&613 '87$4654$/63>4$'3$340$1')0$('30$'1$340$ #'(8685$6876>'36"8 HI"8>083('36"8$"9$IF$"($AJD$ %&'()$!:;$'(('<1$9&'14 G62('3"($/@&101$'3$340$1')0$('30$'1$ (6101$'2"K0$340$C*%$"($DC:!$...
  • Page 18 8/16/19 Replacing the Filters •  Verify that the GX-2012 is off. •  Locate the filter holder at the top of the unit. •  Grasp the filter holder and turn it 1/4 turn counterclockwise. •  Pull the filter holder away from the case.
  • Page 19 8/16/19 Replacing the Batteries Alkaline •  Slide the battery pack away Battery Pack from the instrument •  Insert a new battery pack •  Push the battery pack into the instrument until you hear a click as it locks in Li-Ion Battery place.
  • Page 20 8/16/19 Replacing the Sensors •  Use a screwdriver to remove the three screws holding the belt clip on •  There will be one screw left holding the flow chamber to the instrument. Remove. •  Remove the battery pack getting access to tab. • ...
  • Page 21 8/16/19 Replacing the Scrubbers Place the H2S Scrubber over the LEL sensor •  w ww.rkiinstruments.com Replacing the Sensors Gently pull the tab of the sensor gasket to remove it and expose sensors. Do not lose any of the scrubber filters that are currently installed. • ...
  • Page 22 8/16/19 Replacing the Sensors Remove the sensors from their sockets •  w ww.rkiinstruments.com •  3 1 Replacing the Sensors Gas Tracer Sensors GX-2012 Sensors Carbon Monoxide Oxygen %LEL Catalytic Oxygen %LEL Hydrogen Catalytic Carbon Monoxide Sulfide %Volume Methane PPM Methane...
  • Page 23 8/16/19 Replacing the Sensors Place the sensor gasket and scrubbers back into the chamber. Carefully tuck edge of sensor gasket inside case to seal. •  w ww.rkiinstruments.com •  3 3 Replacing the Sensors Place the flow chamber in position over the sensor area and press it into the case until it is flush with the back of the case.
  • Page 24 8/16/19 Replacing the Pump Unscrew the 4 screws in the top of the unit •  w ww.rkiinstruments.com •  3 5 Replacing the Pump Take off the top cover by pulling straight up •  w ww.rkiinstruments.com •  3 6...
  • Page 25 8/16/19 Replacing the Pump Point at which the pump is connected to the board Grasp the pump and gently pull it out of the unit. Unplug the connector from the circuit board. •  w ww.rkiinstruments.com •  3 7 Replacing the Pump Pump maintenance consists of cleaning diaphragm, valves, replacing diaphragm or replacing the entire pump assy.
  • Page 26 8/16/19 Replacing the LCD Remove the three screws holding the flow chamber and remove flow chamber from unit. •  w ww.rkiinstruments.com •  3 9 Replacing the LCD Remove the sensors from their sockets •  w ww.rkiinstruments.com •  4 0...
  • Page 27 8/16/19 Replacing the LCD Unscrew the 4 screws in the top of the unit. •  w ww.rkiinstruments.com •  4 1 Replacing the LCD Take off the top cover by pulling straight up. •  w ww.rkiinstruments.com •  4 2...
  • Page 28 8/16/19 Replacing the LCD Pull Once the top is off the unit, gently pull the board out of the top of the unit •  w ww.rkiinstruments.com Replacing the LCD The board should slide out easily. •  w ww.rkiinstruments.com •  4 4...
  • Page 29 8/16/19 Replacing the LCD Tabs Tabs Screw Screw Unscrew the 2 screws holding in the bottom of the LCD. Next locate the two tabs on the side of the board, under sensor board. Use a flat head screw driver to gently unlock tabs from PCB. • ...
  • Page 30 8/16/19 Replacing the Sensor Board Remove the 3 screws holding in the Sensor board. •  w ww.rkiinstruments.com •  4 7 Replacing the Sensor Board The next step is to remove the sensor board and install new one. Look for corrosion on the gold sensor contacts. • ...
  • Page 31 8/16/19 GX-2012 Display / Maintenance / Factory Modes Display Mode While in Normal Operation, push DISPLAY(ADJ) to cycle through •  HC Range •  Operation Time –  Only visible if %vol TC sensor •  Date/Time installed •  Remaining Log Time •  Switch between %LEL/%vol/autorange • ...
  • Page 32 8/16/19 Maintenance Mode •  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. When you hear a beep, release the buttons.
  • Page 33 8/16/19 Maintenance Mode •  Once you enter Maintenance Mode, MAINTENANCE will appear along the top of the screen and DATE appears on the bottom of the LCD. •  Use the (SHIFT)▼ button to move through the menu item screens. •  w ww.rkiinstruments.com • ...
  • Page 34 8/16/19 Maintenance Mode •  LNCH BRK - on/off –  With LNCH BRK “OFF” (factory setting), the GX-2012 automatically starts new TWA and PEAK reading collection and resets the time in operation at startup –  With LNCH BRK “ON”, the Resume Measurements Screen displays during startup.
  • Page 35 –  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 until the reset button is pushed after the alarm condition has passed.
  • Page 36 8/16/19 Maintenance Mode •  ALARM--P - alarm point setting •  DLOG DSP - data logger clear screen display setting •  BUMP DSP - bump feature setting –  If “OFF”, the bump menu item in Calibration Mode and Maintenance Mode does not appear. In addition, the BUMP—SET, BP INTVL, BP RMNDR, and BP EXPRD menu items will not display in Maintenance Mode (the factory setting is OFF)
  • Page 37 Maintenance Mode •  BEEP. SET – 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 38 30 days. •  BP RMNDR – 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.
  • Page 39 –  The minimum setting is 0 seconds; the maximum setting is 255 seconds (the factory setting is 30 seconds). •  AUTOZERO - on/off –  If “ON”, the GX-2012 will automatically perform a fresh air adjust when it is turned on (the factory setting is “OFF”). •  w ww.rkiinstruments.com...
  • Page 40 (the factory setting is ON). •  L./B. MODE - LB Mode setting –  If “OFF” (factory setting), the GX-2012 will automatically enter Normal Mode when it is turned on. –  If you wish to use this feature, you can choose between: BH, LC, BH LC • ...
  • Page 41 •  ROM/SUM – Instrument’s firmware version and checksum •  PASSWORD - password setting on/off –  If “ON”, the GX-2012 prompts you for a password when you enter Calibration Mode –  If “OFF” (factory setting), no password is required to enter Calibration Mode.
  • Page 42 8/16/19 Using Factory Mode •  Once you enter Factory Mode, MAINTENANCE will appear along the top of the screen. The DATE Screen displays. •  Use the AIR▲ or (SHIFT)▼ button to move through the menu item screens as needed. •  w ww.rkiinstruments.com • ...
  • Page 43 8/16/19 Factory Mode •  ALM SLNC - on/off •  LNCH BRK - on/off •  LG INTVL - Interval trend time setting •  DLOG DSP - data logger clear screen display setting •  BUMP DSP - bump feature setting •  ROM/SUM - ROM Number • ...
  • Page 44 8/16/19 Setting Flow Alarm •  w ww.rkiinstruments.com •  7 5 Setting Flow Alarm •  Entering Maintenance Mode •  Press and hold the AIR and SHIFT buttons, then press the POWER ENTER button and release all when the unit beeps •  First screen will prompt you for the password- Enter 2102 • ...
  • Page 45 8/16/19 Setting Flow Alarm •  Use the Air key to scroll through the menu items •  Select FLOW ADJUSTMENT by pressing ENTER •  Two values will be displayed •  The top value is a percentage •  The bottom value is the current low flow alarm point (this is the value we are most concerned with.)
  • Page 46 8/16/19 Common troubleshooting techniques •  Fail cal •  Cal interval not reset –  Gas expired - Old sensor –  Did a full cal? (4-gas vs 5-gas) –  Old filter - Auto cal value –  Replace memory retention battery –  Correct regulator • ...
  • Page 47 Gas Detection For Life GX-2012 Hands-on Worksheet Objective: Carefully evaluate your GX-2012 and list below any problems you have found with the instrument and what would be required to bring the instrument back to proper working order. Instrument Serial Number: ___________...
  • Page 48 ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ RKI Instruments, Inc. * 33248 Central Ave. * Union City CA 94587 * Rev. A...