ODORATOR - Measurement Controls

1 User s ManualODORATOR PROPRIETARY NOTICEThe contents of this instruction manual are proprietary to theManufacturing Division of Heath Consultants of this manual, in whole or in part, is prohibitedwithout the express written consent of Heath Consultants Manufacturing Division operates under acontinual product improvement program and reserves the rightto make improvements and/or changes without manual supersedes all previous manuals for 2002, HEATH CONSULTANTS INCORPORATEDHPN. MANUAL: 0715630 Rev. CHPN. ODORATOR Complete Unit: 0705637 ODORATOR User s ManualHeath Consultants IncorporatedHouston, TX713/844-1300 Fax: 713 , Innovation, PerformanceThen, Now and TomorrowINTRODUCTIONN atural Gas (Methane) to be analyzed enters theODORATOR through the barbed fitting at the gas supplyintake port.

2 Internally, the gas passes through an internal fivemicron filter to the input of a low pressure regulator. It thenpasses from the output of the low pressure regulator to theflow valve. This valve, located on the front panel of theODORATOR, is operated by the user. After passing throughthe valve (when opened) the gas enters the mass flow is the heart of the ODORATOR . The mass flow sensorresponds to gas flow within the range of the flow signal from the mass flow sensor is then processed,converted to a digital signal, and fed to a liquid crystal display(LCD). The gas from the mass flow sensor then passes tothe mixing chamber assembly where it is combined with airdrawn in by a blower motor and impeller. The operator thensamples the gas/air mixture at the exhaust sniffing odorant is detected, the operator presses the READ switch to display percent natural electronics and the speed of the blower motor arecalibrated so that the concentration of the gas/air sample atthe exhaust port agrees with the LCD at the 20% LowerExplosive Level ( ) which is 1% gas.

3 All other valuesmust be corrected using the chart. The correction chart isincluded to linearize the instrument in its range. To use thechart, record both the ODORATOR reading and the correctedreading. For ODORATOR readings not specified in the chart,linearly interpolate between the next highest and lowest pointson the chart. Do not extrapolate beyond the readings on thechart. Depending on how much the valve is opened, theconcentration of gas/air at the blower exhaust port will beanywhere from zero to approximately The LCDiiican only read to Concentrations above will beindicated by the LCD having its last two digits blanked out as .When the ODORATOR is turned on, the operator mightmomentarily notice the letter L on the LCD when the READ switch is depressed.

4 If the L fails to disappear, it mayindicated insufficient blower speed, such as would occur ifthe motor and impeller weren t turning at all or too L indicates low blower it is time to replace the batteries, LO BATT will beindicated in the upper left corner of the LCD when the READ switch is AND CAUTIONIT IS ESSENTIAL THAT USERS OF THIS INSTRUMENT READ,UNDERSTAND, AND FOLLOW THE INSTRUCTIONS FOR OPERATIONAND MAINTENANCE AND THE PRECAUTIONS CONTAINED IN THISMANUAL TO INSURE THE INSTRUMENT IS USED IN A PROPER ANDSAFE OPERATION, KEEP THE ODORATOR AWAY FROM OPENFLAMES. INLET SUPPLY PRESSURE SHOULD NOT EXCEED INLET PRESSURES IN EXCESS OF FOUR WOULDRUPTURE THE LOW PRESSURE REGULATOR DIAPHRAGM WHICHWOULD VENT THE GAS OUT OF THE INSTRUMENT AND CAUSE ANINSTRUMENT CALIBRATING THE ODORATOR , YOU WILL BE WORKINGWITH FLAMMABLE GAS (NORMALLY METHANE GAS) WHICH ISPOTENTIALLY DANGEROUS IF NOT HANDLED GAS FROM A LECTURE BOTTLE MAY BE ODORLESS ANDIS FLAMMABLE IN CONCENTRATIONS OF APPROXIMATELY PERCENT BY VOLUME IN YOU ARE NOT CALIBRATING OR OPERATING THEODORATOR, CLOSE ALL VALVES AND TURN THE ODORATOR TIME GAS IS BEING PASSED THROUGH THE ODORATOR THEPOWER SWITCH MUST BE TURNED ON.

5 THIS WILL DILUTE THEGAS AT THE BLOWER EXHAUST AND PREVENT POCKETS OF IS APPROXIMATELY EQUAL TO 5% METHANE GAS BYVOLUME IN AIR. AS LONG AS THE READS BELOW THIS YOUSHOULD NOT HAVE ANY PROBLEM WITH A FLAMMABLE MIXTUREBUILDING SUSPICION OF A GAS LEAK BY UNEXPLAINED SOUND OROPERATION OF THE ODORATOR IS REASON TO IMMEDIATELYSHUT OFF THE GAS SUPPLY VALVES AND ODORATOR POWERSWITCH, THEN SEEK THE CALIBRATION, KEEP THE ODORATOR AWAY FROM OPENFLAMES, INLET PRESSURE SHOULD NEVER EXCEED 4 , ANDDO NOT OBSTRUCT OR BLOCK THE BLOWER INTAKE OR :BECAUSE OF INHERENT LIMITATIONS, LIQUIDCRYSTAL DISPLAYS SHOULD NOT BE SUBJECTED TOEXTREMES OF TEMPERATURE OR HUMIDITY. IF THEUNIT IS EXPOSED TO A TEMPERATURE BELOWFREEZING OR ABOVE +49 C (+120 F), THE LIQUIDCRYSTAL DISPLAY MAY TEMPORARILY CEASE TOFUNCTION PROPERLY, AND IN SOME CASESPERMANENT DAMAGE MAY RESULT.

6 IT ISTHEREFORE RECOMMENDED THAT THEINSTRUMENT NOT BE SUBJECTED TO EXTREMECONDITIONS SUCH AS A CLOSED VEHICLE IN DIRECTSUNLIGHT OR CONTINUOUS AT ALTITUDE:THE ODORATOR MUST BE USED WITHIN 1000 FEETOF ITS CALIBRATION ALTITUDE FOR CORRECTION CHARTS, AS FOUND INAPPENDIX D, MUST BE USED FOR ALTITUDESGREATER THAN 1000 OF CONTENTSINTRODUCTION ..WARNINGS AND CAUTION ..TABLE OF CONTENTS ..CHAPTER IOPERATIONI nstructions for Operation ..A. Procedures ..Periodic Test ..Front PanelFigure 1 ..CHAPTER IICALIBRATIONF ield Calibration Procedure ..A. Required Equipment ..B. Procedures ..Potentiometers On The PCB ..A. Speed Potentiometer ..B. Span Potentiometer ..C. (Coarse) Zero Potentiometer ..D. Flow Potentiometer ..Potentiometer LocationFigure 2.

7 Field Calibration SystemFigure 3 ..vCHAPTER IIIMAINTENANCE INFORMATIONT roubleshooting Chart ..Parts List ..Appendix AAlternate Test Method ..Appendix BField Calibration & Periodic Test Records ..Appendix CODORATOR Natural Gas Calibration Chart ..Appendix DUse at IVSERVICE INFORMATIONW arranties and Warranty Repair ..Customer Service, Manufacturing and InstrumentRepair ..viOPERATIONC hapter I1 OPERATION:This Chapter discusses, in detail, the proper steps to safely operatethe ODORATOR . Also included are procedures for periodic testing,and identification of the ODORATOR s of the ODORATORWARNINGDURING OPERATION, KEEP THE ODORATOR AWAYFROM OPEN FLAME. INLET SUPPLY SHOULD NOTEXCEED 4 **NOTE**Connect the ODORATOR to the gas supplywith a non-absorbing, odor-free hose such ashigh grade urethane, PVC, or Tygon.

8 **NOTE**Operators of the ODORATOR should beselected with due consideration to smokinghabits, colds, and other conditions of health,since these factors affect the sense of is desirable to select operators with anaverage sense of smell in order to obtainreasonably consistent results from the use ofthis instrument.**NOTE**See Figure 1 on page 4 for reference to thefollowing Procedures**NOTE**See Appendix A for Alternate Test Connect the sample hose to the gas supply outlet valve and tothe ODORATOR inlet port.(1) , turn the flow valve(6) clockwise until Turn the power switch(2) to on Open the gas supply outlet For new instruments turn the flow valve(6) counter-clockwisefully to open the valve.

9 This will condition the ODORATOR system. Wait for about 30 seconds or until you smell an odorof gas at the blower exhaust, which ever occurs first, thenimmediately turn the flow valve clockwise to fully close Push the read switch(5) and while holding it down adjust thezero knob(7) until the LCD reads .00 . Release the read Sniff the un-odorized air stream at the exhaust Slowly open the flow valve counter-clockwise while sniffingwith your nose directly over the blower exhaust portapproximately 3/4 . Your upper lip should lightly touch the frontedge of the blower exhaust When a change in odor, or first faint smell of gas is detected,stop turning the flow valve and push the read switch. Make anote of the percent gas reading shown on the LCD(4).

10 This isthe threshold limit value or threshold value. Considerable variationwill exist between individuals in detecting this threshold correction chart is included to linearize the instrument in itsrange. To use the chart, take the ODORATOR reading andlook up the corrected reading. For ODORATOR readings notspecified on the chart, linearly interpolate between the next highestand lowest points on the chart. Do not extrapolate beyond thereadings on the chart.**NOTE**The operator should frequently pause whensniffing for odorant, moving the nose awayOPERATION3from the instrument, breath fresh air, then continue the precaution is necessary because thesense of smell fatigues rapidly during this typeof Close the gas supply Disconnect the sample hose from the gas supply Fully open the flow adjustment valve counterclockwise andleave the ODORATOR on for approximately one minute afterthe test to purge the mixing Turn the ODORATOR TestA.