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Summary of Contents for Bascom_turner GAS-EXPLORER OM-0517
- Page 1 BASCOM-TURNER INSTRUMENTS GAS-EXPLORER DETECTORS OPERATION MANUAL NATURAL GAS, CARBON MONOXIDE, OXYGEN, HYDROGEN SULFIDE Part Number OM-0517...
- 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.
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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 ....................…… PART 2. SETUP, CALIBRATION AND ALARM LEVEL SELECTION Setup Parameters …………………………………………………………………….. -
Page 4: Specifications
SPECIFICATIONS Gases Detected Natural Gas (Methane) Resolution Carbon Monoxide (CO) [Optional] 20 ppm from 0 to 10,000 ppm Hydrogen Sulfide [Optional] 0.05 vol % from 0 to 5 vol % Oxygen (O [Optional] 1.0 vol % from 5 to 100 vol % 1 ppm Sensors Dual Catalytic Combustion (CH... - Page 5 FEATURES The Gas-Explorer 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: ...
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Page 6: Part 1. Operation
PART 1. 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 7: 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 toggles “Mute” on and off in the Track Gas mode (see later). Double-clicking the middle button turns the backlight continuously ON, or OFF depending on its previous state. - Page 8 Accuracy. A properly operating and calibrated detector will respond with the specified accuracy. If combustible gases other than the gas used for calibration are likely or suspected, the instrument cannot be relied upon to give a proper indication of their concentration and hence of how close to their combustible limits they may be.
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Page 9: 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. A label for each key is shown on the display. To turn the instrument on, press the left switch. - Page 10 Operational Modes. The instrument operates in four distinct modes, “Monitor”, “Track Gas”, “Bar Hole” and “Purge”. Monitor: The detector shows the concentration of natural gas (methane) in air in steps of 0.05% GAS (1% LEL) up to 5% GAS (100% LEL) and then in steps of 1% GAS up to 100% GAS.
- Page 11 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. If it does not, use the right button (“Zero/Off”) to get a new zero in clean air.
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Page 12: 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. 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 13: 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 14: 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 batteries sold by Bascom-Turner. The batteries are good for at least eight, and typically twelve, hours of continuous operation. When the batteries are drained to about one hour of remaining continuous use, the unit alarms and the display flashes "Low Batteries"... -
Page 15: 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 16: 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 17 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.
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Page 18: Part 2. Setup, Calibration And Alarm Level Selection
PART 2. SETUP, CALIBRATION AND ALARM LEVEL SELECTION SETUP PARAMETERS To change setup parameters, power on the Gas-Explorer and while it displays “Bascom- Turner Gas-Explorer” press the right button once. A menu will be displayed with a pointer: Alarm Limits Bar Hole Time Air Free CO Power Off... -
Page 19: 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. -
Page 20: Part 3. The Usb Interface
PART 3. THE USB INTERFACE The USB interface is used for docking calibration and for connecting a Gas-Explorer to a computer for data transfer 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. -
Page 21: Downloads
DOWNLOADS The main menu allows selection of four different downloads from the detector to the PC: readings, calibrations, locations (if available), and user, unit and setup data. Also three types of reports can be selected: Readings and Exposure (TWA and STEL), Calibration, and User, Unit and Office. - Page 22 Number of times the unit was powered on since last calibration Methane sensor cleaned during calibration (Y/N) User Data. The user data is stored in the detector as a single record and includes: User Name Day Limit Between Calibrations Personal Identification Number (PIN) PIN entry can be optionally required for calibrating a detector at a docking station.
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Page 23: Reports
REPORTS Reports are selected from the "Readings and Exposure Reports" submenu. This submenu has two tables listing units by unit ID with each table providing different information about the units. The tables of stored alarms and readings which can be scrolled independently of each other by first left-clicking with the mouse to highlight a field, then scrolling with either the up and down arrow keys or the Page Up and Page Down keys. -
Page 24: Administration
Time/Use is total minutes unit was on divided by number of times it was turned on. Use/Day is total minutes unit was on divided by number of days in use. Uses/Day is number of times unit was turned on divided by number of days in use. CAL. -
Page 25: Part 4. Maintenance
PART 4. MAINTENANCE SENSOR AND PUMP INSTALLATION To install a new sensor or pump follow these steps: 1. Power OFF the instrument, remove the batteries, and with a box wrench unscrew the inlet port and filter assembly. 2. Remove the six recessed Phillips screws from the back of the instrument case and lift the top cover off the case. - Page 26 Figure 4. Gas-Explorer with top of case and main circuit board removed.
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Page 27: 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) ..........Fiberglass Bar Hole Probe (36 inch long, no side holes) ..........
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