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RKI Instruments GX-2001 Operator's Manual

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Model GX-2001
Operator's Manual
Part Number: 71-0053RK
Revision: J
Released: 10/21/10
www.rkiinstruments.com

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Summary of Contents for RKI Instruments GX-2001

  • Page 1 Model GX-2001 Operator’s Manual Part Number: 71-0053RK Revision: J Released: 10/21/10 www.rkiinstruments.com...
  • Page 2 Frequency of calibration depends upon the type of use you have and the sensor types. 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. Model GX-2001 Operator’s Manual...
  • Page 3 Warranty RKI Instruments, Inc., warrants the Model GX-2001 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. Replacement parts are warranted for 1 year from the date of their shipment from RKI Instruments, Inc.

  • Page 4: Table Of Contents

    Turning Off the Model GX-2001 ........
  • Page 5 To prevent ignition of a hazardous atmosphere, batteries must only be changed or charged in an area known to be nonhazardous. Not tested in oxygen enriched atmospheres (above 21%). Model GX-2001 Operator’s Manual Table of Contents...

  • Page 6: Introduction

    The Model GX-2001 offers a full range of features, including: •...

  • Page 7: Specifications

    Specifications Table 1: Model GX-2001 Specifications Model Name Model GX-2001 Target Gas Combustibles Oxygen (O Hydrogen Carbon (Methane Sulfide Monoxide calibration (CO) standard) Range 0-100% LEL 0-40.0 vol% 0-100 ppm 0-500 ppm (Increment) (1% LEL) (0.1 vol%) (0.5 ppm) (1 ppm)
  • Page 8 Table 1: Model GX-2001 Specifications Model Name Model GX-2001 Other • Charging Station with PC Communication Function for Datalog Downloading Accessories • Communication Computer Cable ® • Communication Software (Windows 95, 98, NT) • Automatic Calibration Station • Hand Aspirated Sample Draw with Hose and Probe •...

  • Page 9: Description

    Figure 1: Components of the Model GX-2001 Case The Model GX-2001’s sturdy, high-impact plastic and metal case is radio frequency (RF) resistant, and is suitable for use in many environmental conditions, indoors and out. The unit is dust proof and weather resistant.

  • Page 10: Sensors

    Beneath the control buttons is the buzzer/vibrator, which is located inside the unit. On the right side of the Model GX-2001 are the diffusion ports for the gas sensors located inside the case. These sensors are, from top to bottom...

  • Page 11: Scrubber Filters/Sensor Cover

    The gas reacts in the sensor and produces a current proportional to the concentration of the target gas. The current is amplified by the Model GX-2001’s circuitry, converted to a measurement of gas concentration, and displayed on the LCD.

  • Page 12: Lcd

    It fits over all the sensor diffusion ports and is secured in place by the sensor cover retainer. If the sensor cover becomes dirty, the accuracy of the GX-2001 will be affected. Replace the sensor cover if it appears dirty.

  • Page 13: Printed Circuit Boards

    NOTE: The printed circuit boards contain no user serviceable parts. Alarm Lights The Model GX-2001 has two alarm lights located on top of the unit. The alarm lights are two red LEDs that alert you to gas, low battery, and sensor failure alarms.

  • Page 14: Buzzer/Vibrator

    Belt Clip On the back of the Model GX-2001 is a belt clip. The belt clip permits the unit to be worn on a belt or to be clipped to a pocket for hands-free gas monitoring.

  • Page 15: Start Up

    Start Up This section explains how to start up the Model GX-2001 and to get it ready for operation. Start-up Procedure 1. Press and hold the MODE/POWER button for one second to turn on the Model GX-2001 and to activate its LCD. The alarm lights flash, the buzzer sounds, and the vibrator vibrates.

  • Page 16: Performing A Demand Zero

    Performing a Demand Zero Before using the Model GX-2001, it is a recommended to set the zero reading (demand zero) for the target gasses to ensure accurate gas readings in the monitoring environment. 1. Find a fresh-air environment. This is an environment free of toxic or combustible gasses and of normal oxygen content (20.9%).

  • Page 17: Operation

    GX-2001 is in Measuring Mode using the MODE/POWER and DISP buttons. With oxygen, you can display both peak and minimum readings. 1. Make sure the Model GX-2001 is in Measuring Mode. The four target gasses should be displaying in sequential order on the LCD.

  • Page 18: Displaying Stel And Twa Readings

    15 seconds, the Model GX-2001 returns to Measuring Mode automatically. Displaying STEL and TWA Readings With the Model GX-2001, you can display STEL and TWA readings for H and CO. STEL is an acronym for short-term exposure limit, and it shows the average reading for H S and CO during the last 15 minutes.

  • Page 19: Combustible Gas Detection

    The table below lists the conversion factors for several hydrocarbon gasses if the GX-2001 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. For example, if you are detecting pentane and the display reads 10% LEL on the combustible channel, you actually have 10% LEL x 1.35 = 13.5%...

  • Page 20: Alarms

    Alarms This section covers alarm indications, including multiple alarms and trouble alarms. It also tells you how to reset the Model GX-2001 after an alarm has occurred and how to respond to an alarm condition. NOTE: False alarms may be caused by radio frequency (RF) or electromagnetic (EMI) interference.
  • Page 21 • Back light turns on. Low Battery Warning • Battery icon None flashes. Dead Battery Alarm • Gas reading Double Pulsing Tone replaced by FAIL. (two pulses in quick • Battery icon succession) flashes. Model GX-2001 Operator’s Manual Operation • 16...
  • Page 22 NOTE: Even though gas concentrations may have returned to normal or have fallen below the alarm point, the alarm indications will continue until you have reset the alarm using the MODE/POWER button. 17 • Operation Model GX-2001 Operator’s Manual...
  • Page 23 3. Reset the alarm using the MODE/POWER button once the alarm condition has cleared. 4. Calibrate the Model GX-2001 as described in the calibration section of this manual. 5. If the over range condition continues, you may need to replace the sensor that has triggered the over range alarm.

  • Page 24: Aspirator Adapter

    3. If the sensor failure continues, replace the sensor as described in “Replacing a Sensor.” 4. If the sensor failure condition continues after you have replaced the sensor, contact RKI Instruments, Inc. for further instructions. Aspirator Adapter The aspirator adapter accessory is used when it is necessary to draw sample from an area that cannot be entered or that must be checked for safety before entry, such as a tank or confined space.
  • Page 25 1. Turn on the GX-2001 as directed in the Startup section. 2. Attach the adapter plate of the aspirator adapter to the sensor side of the instrument. 3. Screw the probe onto the threaded end of the 10 ft. hose.

  • Page 26: Displaying And Setting The Alarm Points

    Displaying and Setting the Alarm Points The Model GX-2001 allows you to display and set the alarm points of the four target gasses. Each of the target gasses has both a low (Alarm 1) and high (Alarm 2) alarm setting. Two gasses, CO and H S, have STEL and TWA alarm points.
  • Page 27 Display and Adjust the Alarm Points 1. Make sure the Model GX-2001 is turned off. The LCD should be blank. 2. Press and hold the AIR button, then press and hold the MODE/POWER button. 3. As soon as segments appear on the display (approximately one second), release the AIR button.

  • Page 28: Setting The Time And Date

    Setting the Time and Date The Model GX-2001 allows you to set the time and date. 1. Make sure the Model GX-2001 is turned off. The LCD should be blank. 2. Press and hold the DISP button, then press and hold the MODE/ POWER button to put the Model GX-2001 into Time Adjustment Mode.

  • Page 29: Calibration

    Calibration This section covers the calibration of the Model GX-2001. Setting the zero reading is described first followed by single calibration and auto calibration. For single calibration, you are told what is needed to complete the task, how to assemble the calibration kit, and how to set the span readings of the four target gasses.

  • Page 30: Single Calibration

    5. When the zero readings have been set, the LCD displays “Adj,” which prompts you to release the AIR button. Single Calibration This section tells you how to calibrate the Model GX-2001 using the single calibration (CAL) menu. Preparation Before you calibrate the Model GX-2001, you must set the zero readings as described in “Setting the Zero Readings for All Target Gasses.”...
  • Page 31 AI R PO W ER Figure 6: Assembling the Calibration Kit and Attaching It to the Model GX-2001 1. Attach the adapter plate to the unit. It snaps onto the sensor area. 2. Attach the calibration tubing to the adapter plate, then attach the opposite end of the tubing to the regulator.
  • Page 32 The tubing may be left on the adapter plate for convenience. 11. Use the MODE/POWER button to place the Model GX-2001 in Measuring Mode or to turn the unit off.

  • Page 33: Auto Calibration

    2. Turn off the Model GX-2001 if it is on. 3. With the GX-2001 off, press and hold the AIR button, then press and hold the MODE/POWER button. Release both buttons when you hear a “beep.” The LCD displays “CAL,” the battery level, and the time.
  • Page 34 “Replacing a Sensor.” Press the MODE/POWER button to see what sensors have failed. 9. The Model GX-2001 will enter its start-up sequence if no sensors have failed the auto calibration. 10. Remove the regulator from the cylinder, remove the adapter plate from the unit, then store the contents of the calibration kit in a safe place for future use.

  • Page 35: Maintenance

    Maintenance This section describes troubleshooting procedures for the Model GX-2001. It also describes how to recharge the Model GX-2001’s battery pack as well as how to replace the unit’s battery, sensor cover, and gas sensors. WARNING: RKI Instruments, Inc. recommends that service, calibration, and repair of RKI instruments be performed by personnel properly trained for this work.
  • Page 36 Table 6: Troubleshooting the Model GX-2001 Probable Symptoms Recommended Action Causes • The LCD shows • The Model GX- 1. Recalibrate the unit. abnormally high 2001 may 2. Replace the sensor for the or low readings need to be affected channel(s).

  • Page 37: Recharging The Battery Pack

    NOTE: A battery pack will have a typical service life of 500 charging cycles minimum. When using the GX-2001, be sure to drain the battery as much as possible before recharging. If the battery is regularly only partially drained before charging, the battery will experience a “memory effect”...

  • Page 38: Replacing The Battery Pack

    Replace the battery pack when it no longer holds a charge. 1. Verify that the Model GX-2001 is off. 2. On the left or right side of the Model GX-2001, unscrew two of the screws securing the belt clip retaining pins to the unit.
  • Page 39 CAUTION: When replacing the battery, be certain to insert the bottom of the battery (the thickest and largest part) first into the housing of the Model GX-2001 before inserting the top. Inserting the top of the battery first before the bottom may damage the circuit board underneath.

  • Page 40: Replacing The Scrubber Filters

    7. Reattach the sensor cover retainer in its original position. It should snap into place onto the sensor retainer. 8. Replace the two screws that secure the sensor retainer and sensor cover retainer to the Model GX-2001, which you removed in step 2 above. 35 • Maintenance...

  • Page 41: Replacing The Sensor Cover

    5. Reattach the sensor cover retainer in its original position. It should snap into place onto the sensor retainer. 6. Replace the two screws that secure the sensor retainer and sensor cover retainer to the Model GX-2001, which you removed in step 2 above. Model GX-2001 Operator’s Manual...

  • Page 42: Replacing A Sensor

    1. Verify that the Model GX-2001 is off. 2. Unscrew the two screws that secure the sensor retainer (with the sensor cover retainer still attached) to the Model GX-2001 enough to remove the sensor retainer with the screws still in place.

  • Page 43: Rotating The Belt Clip

    Line up slots in H2S and CO sensors with tabs in case. Figure 11: Replacing the Sensors and Their Locations in the Model GX-2001 5. Place the sensor retainer in its original position, then secure it to the Model GX-2001 with the two screws.

  • Page 44: Parts List

    Parts List Table 7 lists replacement parts and accessories for the Model GX-2001. Table 7: Parts List Part Number Description 06-1248RK Calibration kit tubing (specify length in feet) 13-0112RK Wrist strap 13-0113RK Neck strap 10-1100RK Screw, self tapping, for case...
  • Page 45 Hand aspirated sampler, w/10’ hose, probe ES-1821 Carbon monoxide sensor ES-1821L Carbon monoxide sensor, for low humidity use ES-1827 Hydrogen sulfide sensor ES-1821L Hydrogen sulfide sensor, for low humidity use NC-6264AT Combustibles sensor OS-BM2 Oxygen sensor Model GX-2001 Operator’s Manual Parts List • 40...

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