RKI Instruments GP-01 Operator's Manual

Combustible gas monitor

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Model GP-01
Combustible Gas Monitor
Operator's Manual
Part Number: 71-0083RK
Revision: C
Released: 1/17/05
RKI Instruments, Inc. 33248 Central Ave. Union City, CA 94587
Phone: 800-754-5165
Fax: 510-441-5650

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Summary of Contents for RKI Instruments GP-01

  • Page 1 Model GP-01 Combustible Gas Monitor Operator’s Manual Part Number: 71-0083RK Revision: C Released: 1/17/05 RKI Instruments, Inc. 33248 Central Ave. Union City, CA 94587 Phone: 800-754-5165 Fax: 510-441-5650...
  • Page 2 Warranty RKI Instruments, Inc., warrants the Model GP-01 Single LEL Gas Monitor sold by us to be free from defects in materials, workmanship, and performance for a period of two (2) years from the date of shipment from RKI Instruments, Inc. This includes the instrument and the original sensor.
  • Page 3: Table Of Contents

    Turning Off the Model GP-01 ........
  • Page 4 To prevent ignition of a hazardous atmosphere, batteries must only be changed or charged in an area known to be nonhazardous. This unit has not been tested in an oxygen enriched atmosphere (above 21%). 4 • Table of Contents Model GP-01 Operator’s Manual...
  • Page 5: Introduction

    fields, mines, and chemical plants. The Model GP-01 is even small enough to be placed conveniently in a pocket. The Model GP-01 offers the following features: •...
  • Page 6: Specifications

    Specifications Table 1: Model GP-01 Specifications Target Gas Combustible Gas, Methane (CH ) Calibration Standard Detection Range 0-100% LEL (1% LEL Increments) Detection Principle Catalytic Combustion Method Sampling Type Diffusion Response Time T90 in 30 seconds Indication 7-Segment Digital LCD Gas Alarms •...
  • Page 7: Description

    Description This section describes the components of the Model GP-01. These components include the GP-01’s protective rubber boots, case, membrane retainer and filter disks, sensor retainer, sensor, LCD, control buttons, printed circuit boards, alarm lights, buzzer, vibrator, and batteries. Sensor End...
  • Page 8: Protective Rubber Boots

    fits over the sensor cover end of the GP-01 and the battery end boot fits over the battery cover end of the GP-01. If you have a Ni-cad battery pack in your GP-01, you must remove the battery end boot to insert the GP-01 in the charger.
  • Page 9: Alligator & Belt Clips

    Alligator and Belt Clips The GP-01 is available with two types of clips, the alligator clip and the belt clip. Both are illustrated in Figure 2 below. Belt Clip Alligator Clip Figure 2: Alligator & Belt Clips The alligator clip can be used to attach the GP-01 to clothing or a belt.
  • Page 10: Sensor Retainer

    flowing through it. The current is amplified by the Model GP-01’s circuitry, converted to a measurement of combustible gas concentration, and displayed on the LCD.
  • Page 11: Lcd

    The LCD is visible through the front of the case. When the GP-01 is in Measuring Mode, the target gas concentration, battery condition, and alarm indications are displayed on the LCD. Various other items are displayed when the LCD is in other modes, such as Calibration Mode.
  • Page 12: Alarm Lights

    NOTE: The printed circuit boards contain no user serviceable parts. Alarm Lights The Model GP-01 has two red LED alarm lights. They alert you to combustible gas, low battery, and sensor failure alarms. The smaller of the two lights is square, has a frosted plastic cover, and is located at the top of the unit to the left of the membrane retainer.
  • Page 13: Start Up

    Start Up This section explains how to start up the Model GP-01 and to get it ready for operation. CAUTION: Before each day’s usage sensitivity must be tested on a known concentration of the combustible target gas, typically methane, equivalent to 25 - 50% of full scale. Accuracy must be within -0 - + 20% of concentration.
  • Page 14: Turning Off The Model Gp-01

    Mode and how to display the peak reading. It also covers alarm indications. Measuring Mode To put the Model GP-01 in Measuring Mode, assuming the unit is off, press and hold the POWER/MODE button for three seconds. Before continuing, it is advisable to perform a fresh-air adjustment in a fresh-air environment.
  • Page 15: Combustible Gas Detection

    The table below lists the conversion factors for several hydrocarbon gasses if the GP-01 is calibrated to methane. To use this table, multiply the display reading on the GP-01 by the factor in the appropriate row to obtain the actual gas concentration.
  • Page 16 S scrubber disks are used, then response to solvent gasses such as IPA, toluene, or styrene will be slowed and decreased. If the GP-01 is to be used for solvent gas applications, do not install the H S scrubber disks.
  • Page 17: Alarms

    Alarms This section covers alarm indications. It also tells you how to reset the Model GP-01 after an alarm has occurred and how to respond to an alarm condition. Alarm Indications The Model GP-01 will sound an alarm, flash its alarm lights, and vibrate when the target gas concentration rises above the low alarm point.
  • Page 18 Responding to an Over Range Alarm WARNING: An over range condition may indicate an extreme combustible gas concentration. Confirm the gas concentration with a different Model GP-01 or with another gas detecting device. 1. Follow your established procedure for an increasing combustible gas condition.
  • Page 19 2. Reset the alarm by pressing and releasing the POWER/MODE button after the alarm condition has cleared. 3. Calibrate the Model GP-01 as described in the calibration section of this manual. 4. If the over range condition continues, you may need to replace the sensor.
  • Page 20: Alarm Points

    Alarm Points The Model GP-01 allows you to display and set the alarm points. There is a low alarm point and a high alarm point. Both are rising alarms, meaning that the alarm condition is triggered when the gas concentration rises to the alarm point.
  • Page 21 Measuring Mode. If you want to cycle through the alarm points again, press and hold the POWER/MODE button to turn off the Model GP-01. Then begin with step 2 above to put the unit back into Alarm Point Adjustment Mode.
  • Page 22: Calibration

    Calibration This section covers the calibration of the Model GP-01. Setting the fresh air reading is described first followed by setting the span reading. You are also told what is needed to complete the task and how to assemble the calibration kit.
  • Page 23 WARNING: Calibrate the Model GP-01 in a non-hazardous environment. 1. Attach the calibration adapter to the top of the Model GP-01. The calibration adapter opens up like a clothes pin. It fits over the Model GP- 01’s gas sensor port on top of the sensor retainer and secures itself there by clamping to the front and back of the Model GP-01.
  • Page 24 Measuring Mode. NOTE: If the GP-01 displays “FAIL” on the LCD after you press the Power/ MODE button, the sensor output may be too low or too high or there may be a problem with the calibration gas or calibration kit setup.
  • Page 25: Maintenance

    Maintenance This section describes troubleshooting procedures for the Model GP-01. It also describes how to change or charge the Model GP-01’s batteries as well as how to replace the unit’s gas sensor and filter disks. WARNING: RKI Instruments, Inc. recommends that service, calibration, and repair of RKI instruments be performed by personnel properly trained for this work.
  • Page 26: Replacing Or Charging The Batteries

    Table 6: Troubleshooting the Model GP-01 Probable Symptoms Recommended Action Causes • “FAIL” displays • The calibration 1. Check all calibration tubing during span value may not for leaks or for any bad adjustment. match the connections. cylinder gas 2. Make sure the Model GP- concentration.
  • Page 27 2. Make sure the Model GP-01 is off. 3. Remove the battery end protective rubber boot. 4. Place the Model GP-01 into the battery charging station as shown in Figure 8 below so that the metal contacts on the back of the unit come into contact with the metal contacts in the back part of the holder in the charging station.
  • Page 28 To Recharge the Ni-cad Battery Pack Out of the GP-01 The GP-01 battery pack may be recharged directly in the charger without being in a GP-01. This capability is useful if you have spare battery packs. The following instructions assume the battery pack is not in a GP-01.
  • Page 29: Replacing The Combustible Sensor

    Replacing the Combustible Sensor WARNING: Replace the sensor in a non-hazardous environment. 1. Verify that the Model GP-01 is off. 2. Remove the sensor end protective rubber boot. 3. With a small Phillips screwdriver, carefully unscrew the two screws that hold the sensor retainer in place.
  • Page 30: Replacing The Sensor Filters

    When replacing the sensor filters, it is recommended that you replace all three filters at the same time. 1. Verify that the Model GP-01 is off. 2. With a small Phillips screwdriver, carefully unscrew the single screw that holds the membrane retainer in place.
  • Page 31 S scrubber disks are installed, be very careful not to push them too far into the recess in the sensor retainer. Lay the disks carefully in the opening on top of the small tabs in the recess. 5. Reinstall the membrane retainer. Model GP-01 Operator’s Manual Maintenance • 31...
  • Page 32: Parts List

    Parts List Table 7 lists replacement parts and accessories for the Model GP-01. Table 7: Parts List Part Number Description 06-1248RK Calibration kit tubing (specify length in feet) 07-6009RK Gasket for battery cover 10-1099RK Screw, M2X 4mm pan head Phillips, stainless...
  • Page 33 Regulator, fixed flow, 0.5 LPM, for 17/34 liter steel cylinder 81-1004RK Regulator, fixed flow, 0.5 LPM, for 103 liter steel cylinder 81-1104RK Calibration adapter for GP-01 & GasWatch 2 81-GP01-LV Calibration kit, methane LEL, 34 liter NC-6264AT Combustible LEL sensor Model GP-01 Operator’s Manual...

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