Heathus OMD Manual

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OMD™ USER'S

Heath Consultants Incorporated

Houston, TX

713/844-1300

Fax: 713/844-1309

1-800-HEATH-US

www.heathus.com

Manual

Heath....Leadership, Innovation, Performance

Rev D

Then, Now and Tomorrow

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Page 1 OMD™ USER’S OMD™ USER’S OMD™ USER’S OMD™ USER’S OMD™ USER’S Manual Heath Consultants Incorporated Houston, TX 713/844-1300 Fax: 713/844-1309 1-800-HEATH-US Heath..Leadership, Innovation, Performance www.heathus.com Then, Now and Tomorrow Rev D...
Page 3: Table Of Contents
TABLE OF CONTENTS SPECIFICATIONS ................5 CHAPTER I OVERVIEW ..................7 CHAPTER II INSTALLATION PROCEDURE ............10 Crossbar Installation ..............10 Additional Notes On Crossbar Installation ........11 Power Box Installation ..............12 Cable Assemblies Installation ............13 Display Installation ................. 14 Display Connectors ................
Page 4 Troubleshooting ................34 CHAPTER VII SERVICE INFORMATION ............. 37 Warranty and Warranty Repairs ............ 37 Customer Assistance and Service Locations ........ 38 Appendix A SURVEY PROCEDURES - MOBILE OMD™ ........ 40 Appendix B DRAWINGS ................... 55 USING ADOBE ACROBAT READER ..........60...
Page 5 Battery low System Power: 72 Watts @ 12 VDC System Voltage: 12 - 16 VDC NOTE: To avoid damage to the OMD™ power box, the fuse must be removed prior to charging or jumping the battery in the survey vehicle!
Page 6: Specifications
YSTEM PECIFICATIONS System Weight: External Sub - Systems: 17 pounds Power Box 6 pounds Internal Display 3 pounds Cables 4 pounds 63.25, 32, 51.25in. ± 2in. Crossbar Assembly Length: Mechanical Mounting: Strut bracket mount Installation Time: 2 hours, typical External Housing Rating: NEMA 3S and IP 54 Display Housing Rating: Spill proof...
Page 7: Chapter I
Based on the absorption of infrared (IR) radiation by methane, the OMD consists of an IR light source directed at an IR optical detector. These two are spaced approx. four feet apart across the width of the vehicle. An optical filter in front of the detector transmits primarily methane specific IR wavelengths from the light source.
Page 8 An Installation Mounting Kit is available for mounting the OMD to the front of a vehicle. All interconnecting cabling is provided with the OMD including the cable to obtain power to operate the instrument from the survey vehicle 12 volt battery.
Page 9 Experienced operators should use their discretion. Operators should take into account that the wind must be favorable, towards the path of the OMD light bar, to obtain the optimum results. Increased speed from FID survey comes from the instantaneous response of the OMD; however, there are a variety of factors to consider such as, legal limits, terrain and inclement weather for the OMD operation.
Page 10: Chapter Ii Installation Procedure
There are five parts to consider when installing the OMD: 1) The crossbar assembly, 2) The power box, 3) The cable assem- blies, 4) The display unit, and 5) Vehicle Grounding Strap.
Page 11: Additional Notes On Crossbar Installation
OMD relies strictly on the flow of gas through the optical path. Therefore, it is of the utmost importance that you install the OMD in such a way as to allow the gas to flow continuously through the optical path. It is important that you don’t configure your mounting brackets in a way that creates a...
Page 12: Power Box Installation
If you desire to mount it further back, check the length from the desired mounting position to the OMD crossbar assembly mounted in front of the front bumper. After determining where you want to mount your power box, simply place the box in the desired spot and mark through the mounting holes on the ears of the box with a pencil.
Page 13: Cable Assemblies Installation
NSTALLATION Cable assemblies installation: Each cable assembly for the OMD is uniquely constructed so that it cannot be connected to the wrong mating connector. First, you will need to determine which cable goes where. If you mounted the power box under the hood, then you will only need to route the display cable either through the firewall or through the floorboard.
Page 14: Display Installation
0419180 for 8” (each). Be sure to route cables away from exhaust components and shift linkages. The OMD requires six amperes of continuous current. So connect the system power cable to the vehicle’s battery. Do not connect the system power cable to the cigarette lighter or anywhere else that is not rated for at least six amperes.
Page 15: Display Connectors
When a phone plug is plugged into the speaker jack the inter- nal alarm speaker is disabled. Vehicle Grounding Strap A vehicle-grounding strap is included in the OMD mounting kit. The purpose of this strap is to prevent the buildup of an Electro-static charge, thereby preventing any condition of Electro-static discharge between the operator and the display unit, which can cause a reset condition of the display unit.
Page 16: Protective Cage
NOTE: Ground strap mounting hole is .475”ID and strap length is 30”. Protective Cage Because the main part of the OMD is located on the front bumper of the survey vehicle, it is in danger of being damaged due to the possibility of bumping into something. We recom- mend that a cage be built around the OMD to protect it.
Page 17 NSTALLATION Photos of Protective Cages...
Page 18: Operating Procedure
Chapter III OPERATING PROCEDURES Start Up: 1) Turn on the SYSTEM POWER by pressing the “SYSTEM POWER” button. The red LED above the SYSTEM POWER button will light up and a message will appear on the screen stating, “PUSH DISPLAY FUNCTION TO CONTINUE.” Press the Display Function button twice to enter the normal operating mode.
Page 19 PERATING ROCEDURES 60 minutes. The system is stable when the PPM readings become consistant. 4) Press the CALIBRATION TEST button. The red LED above the CALIBRATION TEST button will light up and a small internal cell containing methane will be placed in the optical path.
Page 20: Display Function
PERATING ROCEDURES 6) Set the SPEAKER VOLUME of the alarm to the desired level by pressing either the SPEAKER VOLUME INCREMENT or DECREMENT button to raise or lower the SPEAKER VOLUME. Holding either the up or down SPEAKER VOL- UME button will enable the auto scroll feature. If needed, press the CALIBRATION TEST button to introduce a gas alarm.
Page 21: Light
PERATING ROCEDURES the HOLD mode. The following picture shows the OMD in the HOLD mode. Push Display to Continue Push Display to Continue PRESENT Push Display to Continue Push Display to Continue Push Display to Continue 10 PPM MAXIMUM 16.6...
Page 22: Sample
(approximately one-minute). At the bottom left of the LCD the present ALARM SET POINT for the audible alarm is dis- played. The following picture shows the OMD in SAMPLE mode when it has just begun to sense 9.3 PPM of methane.
Page 23: Ppm Range
PERATING ROCEDURES PPM RANGE: Consecutively pressing the PPM RANGE button allows the formatting of the display with full-scale settings of 10, 30, or 90 PPM. The ranges will actually display to slightly higher values up to 13, 40, and 120 PPM. The PPM RANGE button changes the scale at all times that the time history of the methane level is displayed, including DISPLAY HOLD.
Page 24 PERATING ROCEDURES PRESENT 30 PPM MAXIMUM 16.6 0 PPM SETPOINT 30.0 Here is a 16.6-PPM leak displayed in the 30-PPM range. PRESENT 10 PPM MAXIMUM 16.6 0 PPM SETPOINT 30.0 Here is a 16.6-PPM leak displayed in the 10-PPM range.
Page 25: Alarm Setpoint
BUZZER. THIS IS COMMON WHEN YOU GET OUT OF THE VEHICLE TO VERIFY A LEAK. YOUR VEHICLE COULD BE PARKED CLOSE ENOUGH TO THE LEAK THAT THE OMD GINS TO PICK UP THE LEAK AND START ALARMING WHILE THE OMD IS UN-AT- TENDED.
Page 26: Error Messages
PERATING ROCEDURES ERROR MESSAGES: When a concentration of methane greater than the ALARM SET POINT enters the light path, a high pitched alarm is sounded. The higher the concentration of methane, the higher this pitch becomes. If any errors are present, they will be displayed instead of the levels, and a low pitch alarm sound will be heard.
Page 27: Shut Down
SHUT DOWN: At the end of the workday, press the SYSTEM POWER button to turn off all power. A typical standby current of 50 Miliamps is required when the OMD is “OFF”. This is normal and will not cause any problems.
Page 28: Chapter Iv Alignment Procedure
Chapter IV ALIGNMENT PROCEDURE In order for your OMD to function properly, it is crucial that the optical path be aligned properly. The OMD components are pre-aligned at the factory and should not require re-align- ment when the system is installed on the vehicle. It is, how- ever, important that the u-bolts be attached and tightened such that they do not bow the support rod.
Page 29 LIGNMENT Then, the alignment screws on the Receiver are used to optimize the light level as observed on the Display. This last step directs the optical beam through the optical components of the Receiver to the Detector. Place a piece of tracing paper in front of the receiver input lens and you will be able to see the rectangular shaped light beam projected onto the lens as well as the outline of the lens itself.
Page 30: Receiver Alignment
LIGNMENT Receiver Alignment: Next, remove the paper and clear the light path of all obstacles. Observe the “LIGHT LEVEL” on the display. The alignment screws on the Receiver are used to optimize the light level as observed on the Display. Adjust the receiver alignment screws until the light level reaches its most negative number.
Page 31: Calibration Check
It is designed for leak surveying. Its purpose is to find leaks as small as one (1) PPM. The OMD has an accuracy rating of ± 10% within a range of 1 to 100 PPM. The accuracy drops to ±...
Page 32: Verifying Calibration With External Cell
Again, if your OMD varies from calibration by more than ± 10% within a range of 1 to 100 PPM, it should be examined by...
Page 33 ALIBRATION...
Page 34: Chapter Vi Maintenance Information
Recommended Spare Parts There are only two recommended spare parts for the OMD. The first is the IR specific halogen lamp, which is rated to last one to two years. The Heath part number for the lamp is 2510592.
Page 35 Water has condensed on the The receiver has obtained inside of the receiver lens: a leak, return the OMD to the factory for repair. Water has condensed on the The light assembly has inside of the light assembly lens:...
Page 36 ROUBLESHOOTING PROBLEM SOLUTION Display is blank: Press and hold contrast down button for approx. 15 seconds or until writing appears on screen. If display is still blank, repeat with contrast up button. If screen is still blank call The Heath Customer Service Depart- ment.
Page 37: Chapter Vii Service Information
Chapter VII SERVICE INFORMATION Warranty and Warranty Repairs The OMD is warranted to be free from defects in material and workmanship for one (1) year from date of shipment. The warranty on authorized repairs in the Houston factory service center (FSC) is ninety (90) days materials and thirty (30) days labor.
Page 38: Customer Assistance And Service Locations
If for any reason assistance is required, technical or otherwise, please contact Heath Customer Service at the following phone number. If it is necessary to ship the OMD for service or repair, you may use the original shipping box and ship the...
Page 39 (1-800-432-8487) CORPORATE HEADQUARTERS Heath Consultants Incorporated 9030 Monroe Road Houston, Texas 77061 Phone: (713) 844-1300 Fax: (713) 844-1309 www.heathus.com MANUFACTURING AND WARRANTY SERVICE FOR THIS PRODUCT Heath Consultants Incorporated 9030 Monroe Road Houston, Texas 77061 Phone: (713) 844-1350 Fax: (713) 844-1309...
Page 40: Survey Procedures - Mobile Omd
APPENDIX A HEATH CONSULTANTS INCORPORATED SURVEY PROCEDURES - MOBILE OMD PROCEDURES I. Planning the Survey A. Specific Survey Requirements During the initial contact with the company official, it is most important to review survey procedures. If there are any specific variations from standards involved, the con- sultant must contact his supervisor.
Page 41 PPENDIX A The names and telephone numbers of persons to contact for location of buried telephone and electric cables. Obtain any information or location of known un- derground sprinkler and heated sidewalk systems. Have they received any complaints about odor, etc. from the public? Discuss and resolve any questions regarding the sur- vey (i.e.
Page 42 C. Survey Procedures The consultant drives along those areas to be surveyed placing the light path of the OMD just above the soil or pavement surface. While conducting a mobile survey...
Page 43 PPENDIX the consultant should make every effort to place the OMD over available openings. When the detector senses the presence of methane in the sample, an audible alarm sounds and a read-out of the amount of methane detected is indicated on the display. If necessary the consultant can stop and rerun the suspected area to better establish the point(s) of venting.
Page 44 PPENDIX of the designated streets, particularly where a single main exists, with long services running to the opposite side in a wall-to-wall pavement area. Experience shows that many curb line service leak indications are detected when a mobile unit surveys both sides of the street. Tests of Available Openings Available openings, as described by the American Soci- ety of Mechanical Engineers (ASME), are openings large...
Page 45 PPENDIX 2. Grade 2(B) - A leak that is recognized as being non- hazardous at the time of detection but requires scheduled repair locations are completed. 3. Grade 3(A) - A leak that is non-hazardous at the time of detection and can be reasonably expected to remain non-hazardous.
Page 46 PPENDIX Moisture Content of the Soil The higher the moisture content, the more difficult it becomes for gas to vent and thus to be picked up by the instrument. During heavy rains, or immediately after, it may be necessary to stop the survey, or move to an area where venting conditions are satisfactory due to a change in soil type or elevated gas pressure.
Page 47 PPENDIX D. Gas Pressure Low-pressure gas systems generally will vent much more slowly and poorly than higher pressure systems. High soil moisture content can minimize the point that a sur- vey in low-pressure areas is not practical. In most in- stances, this is of a temporary nature and the survey can be continued by moving to a high-pressure area in the system.
Page 48 PPENDIX low gas to vent rather well. These cracks are subject to filling with water if there is thawing or rain which tem- porarily reduces venting. The most ideal condition for venting during a winter survey is sustained weather below freezing with clear, dry streets.
Page 49 PPENDIX In heavily paved areas, special care should be taken to sample as many venting locations as possible, including available openings.
Page 50 The mobile survey is used in any area where the vehicle can be driven in such a manner as to place the light path of the OMD within the plume of methane that is venting from the ground. What is Inspected...
Page 51 “CALIBRATION/TEST” button. If the OMD is suspected to be out of calibration it should be verified with an external calibration cell. If the OMD is verified to be out of calibration it must be re-calibrated. C. Survey Procedures (Regular Mobile Survey)
Page 52 URVEY In most paved locations the survey can be conducted by driving along the curb or the side of the street where the main is located. However, in the instance of dual mains, particularly wide streets or divided traffic lanes, a par- ticular street may be traversed in both directions.
Page 53 URVEY VII. Centering of Leakage Detection Whenever combustible vapors are detected in the soil or substructure atmospheres, additional tests will be con- ducted to determine the extent of the spread of the gas. The pattern of spread, as well as the relative volume of gas throughout the spread, will be observed to establish the logical source of the leakage indication.
Page 54 URVEY IX. Production per Day Coverage per day will vary due to local conditions and leak indication frequency. X. Report Requirements A. Any leak indication detected, which in the judgement of the consultant requires immediate attention (Grade 1), will be reported by telephone to the designated official when detected, unless otherwise instructed by the client.
Page 55: Drawings
APPENDIX B DRAWINGS INSTALLATION ISOMETRIC INSTALLATION ERROR # 1 WIRING DIAGRAM 1 OF 2 WIRING DIAGRAM 2 OF 2...
Page 60: Using Adobe Acrobat Reader
USING ADOBE ACROBAT READER The OMD WINCAL and User Manuals are included on the OMD WINCAL CD-ROM. Both manuals are in the portable document format (.pdf) used with the Adobe® Acrobat® Reader Software, also included on the OMD WINCAL CD-ROM.