Summary of Contents for Bascom_turner GAS-EXPLORER II EGI-201
- Page 1 BASCOM-TURNER INSTRUMENTS GAS-EXPLORER II DETECTORS OPERATION MANUAL NATURAL GAS, CARBON MONOXIDE, OXYGEN, HYDROGEN SULFIDE Part Number OM-0220...
- Page 2 LIMITED WARRANTY Bascom-Turner Instruments warrants Gas-Explorer Detectors to be free from defects in materials and workmanship for one year following the date of shipment. This limited warranty applies to the original purchaser of the Detector and is not transferable except by Bascom-Turner's authorized Distributors. The instruments described in this manual are produced with standard commercial parts, any of which may fail under some circumstances.
-
Page 3: Table Of Contents
TABLE OF CONTENTS FEATURES SPECIFICATIONS PART 1. OPERATION The Gas-Explorer Detectors ................... Essential Operating Practice .................. Operational Description ..................Instrument Checks....................Interference from Other Gases, Liquids, or RFI ............ Change of Batteries ....................Probes........................Routine Maintenance ..................... Appendix 1: Main Sequences for Operation Modes........... PART 2. - Page 4 FEATURES The Gas-Explorer II portable methane, and combined methane, carbon monoxide and oxygen detectors are intrinsically safe, microprocessor based instruments designed to test ambient air and flue gas over a wide temperature range. These detectors have many features for easy and reliable operation: •...
-
Page 5: Specifications
SPECIFICATIONS Resolution Gases Detected Natural Gas (Methane) 20 ppm from 0 to 10,000 ppm Carbon Monoxide (CO) [Optional] 0.05 vol % from 0 to 5 vol % Oxygen (O [Optional] 1.0 vol % from 5 to 100 vol % Hydrogen Sulfide (H S) [Optional] 1 ppm 0.1 vol %... -
Page 6: Part 1. Operation
PART I. OPERATION THE GAS-EXPLORER DETECTORS This manual describes the operation of the family of Gas-Explorer detectors for natural gas, carbon monoxide and oxygen: Model EGI -201 - Detects natural gas and displays it as PPM, % LEL or % GAS Model EGI -211 - Detects natural gas and displays it as PPM and % GAS Model EGC-301... -
Page 8: Essential Operating Practice
ESSENTIAL OPERATING PRACTICE Gas-Explorer detectors are easy to use. A detector is turned on by pressing the left button; its operation is controlled by three “Soft” buttons whose function is shown on the display. The middle button generally toggles “Mute” on and off in Track Gas mode (see later). Double-clicking the middle button turns the backlight continuously ON or OFF depending on its previous state. - Page 9 A detector can be tested with methane bump gas. Such tests merely verify that the gas sensor(s) are in operating condition. To verify and adjust, if necessary, their sensitivity they must be calibrated. A detector can be automatically calibrated in approximately one minute using Bascom- Turner's calibration gas (2.5% CH and 100 ppm CO in air).
-
Page 10: Operational Description
OPERATIONAL DESCRIPTION To conserve the batteries, turn the instrument OFF when not in use. The instrument is controlled by three push button switches whose function changes with each particular display (see Appendix 1). The function of each push button is shown on the display in each case. - Page 11 Operational Modes. The instrument operates in four distinct modes: “Monitor”, “Track Gas”, “Bar Hole” and “Purge”. A mode may be entered from the Mode Menu screen which can be accessed by pressing the “Mode” button from most screens. In the Mode Menu, pressing the “Yes”...
- Page 12 If in the course of bar holing, water is encountered, press the left “Stop” button to stop the pump. Use of a water-stopper (see Figure 2 in Section 8) will prevent water from entering the instrument. WARNING: If a check is to be made for trace amounts of gas, for example around the foundation of a structure, the Monitor or the Track Gas –...
- Page 13 To Detect Carbon Monoxide Carbon Monoxide in Ambient Air Connect an appropriate probe with a water-block filter and select the Monitor mode. After warm-up, the display shows the concentration of CO in parts per million (ppm). If the air is clean (contains no carbon monoxide), the display should read zero.
-
Page 14: Instrument Checks
INSTRUMENT CHECKS Automatic Sensor Check If a gas sensor fails (opens up), the display shows “Replace Methane Sensor”. Automatic Pump Check If the intake is blocked, the display shows “Flow Blocked” and the detector beeps until the problem is cleared. This check is carried out whether or not a probe is being used. During the power on sequence, if a blocked flow is not detected within 40 seconds (from manually blocking the intake to the pump), the detector displays “No Block Check Probe”... -
Page 15: Interference From Other Gases, Liquids, Or Rfi
INTERFERENCE FROM OTHER GASES, LIQUIDS, OR RFI The methane detectors use two sensors: A catalytic combustion filament calibrated with methane. It is used up to about the lower flammable limit (5.0% by volume) of methane. A thermal conductivity sensor calibrated with methane. It is used from the lower flammable limit (5.0 vol %) to 100 vol % of methane. -
Page 16: Change Of Batteries
CHANGE OF BATTERIES Gas-Explorer detectors may be powered by two (2) alkaline (non-rechargeable) C-size batteries (1.5V, Type AM-3) or by two rechargeable nickel metal hydride (NiMH) batteries sold by Bascom-Turner. The batteries are good for at least eight, and typically ten, hours of continuous operation. -
Page 17: Probes
PROBES Metal Gooseneck Probe The metal gooseneck probe (Part No. GP-514) is a 14 inch long flexible probe which connects to the dust and water-block filter and has a quick connect fitting. Standard Probe The standard probe (Part No. SP-306), a rigid tube, connects to the dust and water-block filter. -
Page 18: Routine Maintenance
ROUTINE MAINTENANCE Dust and Water-block Filter A filter, housed in a knurled nut, removes particles of dust and dirt and blocks water. Do not insert objects into the water block filter as they may puncture the filter. The filter needs to be replaced monthly or sooner if it turns brown. - Page 19 Dust-Stopper (DS-001) The dust-stopper is a filter with a large surface area on which dust can collect without slowing the sampling rate of the Gas-Explorer. The filter element is easily cleaned or replaced by removing the threaded cap and either blowing off the filter element or pulling it off and replacing. Replacement dust filter cartridges are available as Part No.
-
Page 20: Appendix 1: Main Sequences For Operation Modes
APPENDIX 1 MAIN SEQUENCES FOR OPERATION MODES Monitor Zero|Off Mode Monitor %LEL/%Gas Monitor peak Track Zero|Off Mode Barhole Purge Track peak Zero|Off Mode Bar Hole Mode BH/Go Purge %Gas Mode... -
Page 21: Setup
PART 2. SETUP, CALIBRATION AND ALARM LEVEL SELECTION SETUP PARAMETERS To change setup parameters, power on the Gas-Explorer and while the unit displays “Bascom-Turner Gas-Explorer II” press the right button once. A menu will be displayed with a pointer: Alarm Limits Bar Hole Time Air Free CO... -
Page 22: Further Setup Parameters
FURTHER SETUP PARAMETERS Power on the Gas-Explorer and while the detector displays “Bascom-Turner Gas-Explorer II”, press the right button once and the center button once. A menu of four choices will be displayed: Cal Due Time Pump Current New Sensor Power Off The left “Yes”... -
Page 23: Calibration
CALIBRATION Calibration must be carried out on a new sensor the next time the instrument is turned on; with an already installed sensor, the calibration should be carried out at specified intervals. The A- CAL firmware calibrates the Gas-Explorer using calibration gas available from Bascom-Turner containing 2.5 + 0.05% methane and 100 ppm + 2 ppm CO in air. -
Page 24: Part 3. The Usb Interface
PART 3. THE USB INTERFACE The USB interface is used for docking calibration, for data transfer to a computer and for setting operating parameters. The cable required for the connection is a six-foot-long, 4-pin, mini BM plug to standard AM plug and is available from Bascom-Turner (Part No. UC-001). Docking calibration is described in a separate manual and by prompts on the dock. - Page 25 The following gas concentration readings are recorded with a full suite of sensors: 0 – 100% 0 – 40% vol. Percent O Percent LEL Percent GAS 0 – 100% vol. 0 – 2000 ppm PPM CO PPM CH PPM GAS (Track Gas Mode) 0 - 10,000 ppm Note: % LEL readings are only recorded in detector models ending in 201, 301, 321 and 411.
-
Page 26: Reports
Setup Data. There is a factory installed setup file in every detector which contains operational parameters such as alarm levels for each gas detected, features enabled (Y/N), e.g. air- free CO, and settings such as Bar Hole time. Downloading Data. Before downloading any data the operator is asked to verify that the unit is connected to the PC by USB. - Page 27 Readings with GPS Reports. When the unit has a GPS Receiver the Readings with GPS menu allows selection of Survey, Monitor or Bar-Hole data as those modes are stored with the readings. Selecting one of the choices will filter the data accordingly. This new form shows the filtered data and allows plotting the selected data directly in Google Earth.
- Page 28 Bar-Hole Report. The bar-hole report is viewed or printed by entering the unit ID of the detector along with a date and time range. A print button is used to obtain a hardcopy. Calibration Reports. The Calibration Reports screen can be viewed by selecting Calibration in the Reports block of the Main Menu.
-
Page 29: Maintenance
Active Unit Report is a listing of all detectors in the UNITLOG database indicated as non- retired. The report is entitled "Active Unit Data". Fields, which are columns in the tabular report, include: Unit ID Invoice Date Serial No. Assigned to Office Model No. -
Page 30: Sensor And Pump Installation
PART 4. MAINTENANCE SENSOR AND PUMP INSTALLATION To install a new sensor or pump follow these steps while referring to Figure 10: 1. Power OFF the instrument, remove the batteries, and with a box wrench unscrew the inlet port and filter assembly. 2. - Page 31 CAUTION: After replacing a methane or a CO sensor, perform the New Sensor procedure (described under Part 2, Setup and Calibration) and then completely calibrate the instrument (both with 2.5% and 100% gas). Figure 10. Gas-Explorer with top of case and main circuit board removed.
-
Page 32: Accessories And Spare Parts
ACCESSORIES AND SPARE PARTS Description Part Number Probes and Hoses Gooseneck Probe with Quick Connect and Filter (14 inch long) .... Surface Probe (with Quick Connect and Cone) ........Ceiling/Bar Hole Probe & Rubber Tip (34 inch long, clear) ....Clear Bar Hole Probe (34 inch long, clear, side holes) ...... - Page 33 Bascom-Turner Instruments 111 Downey Street, Norwood, MA USA 02062 781-769-9660 800-225-3298 Fax 781-769-2099 bascomturner.com...
Need help?
Do you have a question about the GAS-EXPLORER II EGI-201 and is the answer not in the manual?
Questions and answers