User's Manual Combustible Gas Leak Detector Model GD-3300
Contents
1. User s Manual Combustible Gas Leak Detector Model GD 3300 Introduction The Combustible Gas Leak Detector has a long slim gooseneck probe to find leaks in tight areas It s adjustable alarm easy one hand operation and impact resistance storage case add up to value and convenience Applications and Features include Easily operate the Combustible Gas Leak Detector with one hand to detect presence of combustible gases Audible and visual indicators help pinpoint leak source Adjustable tic rate helps eliminate background gas concentration in contaminated environments e 50 ppm Sensitivity e Adjustable tick rate to locate leaks quickly and easily e Visual leak detection by LED indicators e Precision sensor detects even the smallest leaks e Fast response of less than two seconds to 40 LEL e Includes earphone Jack e 16 gooseneck Safety Tips Before using this Instrument read all safety information carefully In this manual the word WARNING is used to indicate conditions or actions that may pose physical hazards to the user The word CAUTION is used to indicate conditions or actions that may damage this instrument If you are using your Combustible Gas Leak Detector as a result of a service call chances are someone has either smelled a combustible gas leak or someone has reason to believe gas may be leaking While your Combustible Gas Leak Detector is designed to function without producing sparks or otherwise ignit2. ing gas You can control the tic rate using the rotary wheel in the center of the instrument Move the wheel clockwise to increase the frequency Move the wheel counter clockwise to decrease the frequency A tic rate of 4 to 8 tics per second in fresh air is typical As the sensor comes near a combustible gas source the tic rate increases In order to isolate the source of a leak you may need to move the wheel counter clockwise decreasing the sensitivity as the sensor moves closer Replacing the Batteries Replace your 1 5 volt size R14C B alkaline batteries when e The green READY light off e No light or other activity occurs upon turning the instrument on To replace the batteries 1 Lay the instrument face down on a back face 2 Remove the battery cover Apply upward pressure to the tab at the bottom of the battery cover while lifting it out 3 Remove the batteries using a coin or screwdriver if necessary to pry them out 4 Replace all three batteries with new ones Replacing the Sensor Although the sensor is designed to offer many years of reliable service it may become inoperable if it is submerged in liquid or otherwise physically damaged To replace sensor 1 Turn the instrument off 2 Remove the upper tip guard by pressing straight up from the alignment notch that separates the two halves of the tip guard 3 This is a sturdy component but use caution bending its leads 4 Pull the sensor straight up fr
3. ing the ON OFF button and the READY light is glowing The Combustible Gas Leak Detector runs through a one minute warm up and self zeroing sequence when it is first turned on in fresh air The alarm of the instrument may very loud without contact any gas That is caused by the high Tic Rate preset in rotary wheel Rate Sensitivity Adjustment Each time the instrument is put into service you should conduct a quick functional test Adjust the Tic Rate to non alarm level Then simply expose the sensor to a known leak like a cigarette lighter or pass the probe over a drop of combustible fluid After the initial warm up the instrument can be used to detect combustible gasses When the sensor in the probe tip detects a combustible gas the tic rate will increase and the instrument sounds a warbling tone while the ALARM light As the concentration of gas increases so does the tic rate If the situation calls for quiet operation or if background noise makes it difficult to hear the built in speaker you can use an earphone The jack is at the top of the instrument Note that listening to the alarm or tic through the earphone is very loud If the READY light is off the batteries are low They should be replaced immediately Low batteries will adversely affect the instrument s reliability See the replacement procedures Adjusting the Tic Rate Sensitivity The tic rate tells you when the sensor in the tip of the instrument is getting close to a leak
4. ing the gasses it detects the environment you are responding to probably has no such safeguards Most combustible gas leaks are noticed long before concentration levels build up to the point that explosion hazards exist A WARNING If you feel an explosion hazard exists e Arrange for evacuation of people in the area e Call proper authorities from a safe location e Shut off gas source is possible e Ventilate enclosed areas if possible to do so without risk of ignition e DO NOT switch power switches on in area of question As a matter of routine ventilate the area you plan to work in Ventilation will help ensure the gas does not accumulate in large volume where it can attain its Lower Explosive Limit LEL LEL Lower Explosive Limit The point at which a combustible gas when mixed with air has developed the minimum concentration to combust when exposed to a source of ignition The LEL is usually stated as a percentage of gas in air as a fuel air ratio or as parts per million PPM in a International Symbols A Important Information see manual Conforms to European Union directives Controls and Indicators 1 Sensor Tip Guard amp Sensor internal 2 Gooseneck Probe 3 Alarm Light 4 Ready Light Power On 5 Power ON OFF Slide Switch 6 7 8 9 1 Earphone Jack Tic Rate Sensitivity Adjustment Probe Clip Hand handle 0 Batteries cover Instructions Switch on the gas leak detector by slid
5. om its tip housing 5 Replace the sensor pressing it straight in 6 Reassemble in reverse order Specifications Sensitivity 00 50 ppm methane Sensor Type Low power semiconductor Warm Up Time Approx 5 minute Response Time Less than Power Supply 3 C cell batteries Battery Life 8 hours continuous use typical A Visible amp Audible at 10 LEL for Methane Can be calibrated for other co2sec up to 40 LEL Duty Cycle 0 Continuous Probe Length 16 ncentrations or gases Warranty 1 year Operating Conditions To ensure accurate readings use it only when ambient air is within this range Temperature 32 to 120 F Humidity 10 to 90 RH non condensing Gasses Detected The GAS detects a wide variety of gasses including some toxic gasses and nuisance vapors The following lists represents only a portion of the more common gasses it will detect Combustible Natural Gas Propane Butane Methane Acetone Alcohol Ammonia Steam Carbon Monoxide not to quantify Gasoline Jet Fuel Hydrogen Sulfide Smoke Industrial Solvents Lacquer Thinner Naphtha CO0O0O0CO0CO0O0O0O0C0O0000 0
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