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1. TECHNOLOGIES LACS USER MANUAL UNDERGROUND HELIUM LEAK DETECTOR CONTACT US LACS PHONE FAX Toll Free 800 465 1004 Phone 801 486 1004 Fax 801 486 1007 ADDRESS LACO Technologies Inc 3085 West Directors Row Salt Lake City UT 84104 WEB www lacotech com info lacotech com SMT 07 1011 Rev A2 ii O 2010 LACO TECHNOLOGIES INC CONTENTS SCOPE oa EE 1 SAFET aar E S 2 SPECIFICATION siai i 2 PRERANA IN ai EE 3 PALE OPERATION k 4 MAINTENANCE apen 11 ENE 14 EE EE i i ai i i 14 O 2010 LACO TECHNOLOGIES INC 1 SCOPE LACO LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR This manual contains installation operation maintenance and troubleshooting information for LHHLD 2002 Underground Helium Leak Detector Our leak detectors are designed to ensure safety when used properly It is the responsibility of the user to follow safety related warnings cautions notes and other requirements described in this manual 1 1 WARRANTY LACO Technologies warrants to the original Customer that all new and unused goods furnished by Seller shall be free from defect in workmanship and material at the time and place of delivery by LACO For distributed products resold by LACO the warranty of the original manufacturer will apply and is available upon request In the case of repair services or refurbished products sold by LACO the following warranty p2. 5 7 OPERATION The LHHLD 2002 features high tech membrane switches with a large multifunction liquid crystal display and patented filter system Each key of the membrane switch features a raised embossed edge that is designed to be felt when wearing protective gloves The switches themselves require 12 in oz of pressure for the contacts to close and will generate a noticeable click that is both felt and heard The following is description of each button on the LHHLD 2002 Table 4 LHHLD 2002 Button Descriptions CONTROL NAME DESCRIPTION ON OFF The ON OFF button supplies power to the instrument Once the unit is turned on it will initialize then conduct a 30 second power on self test POST The instrument will turn off automatically when left unattended for longer than 15 minutes LIGHT The light button is used to turn on and off the LCD backlight By default the LCD backlight is turned off to conserve battery life To turn on the backlight push this button once The backlight will illuminate and will remain on until the button is pressed again or the unit is turned off SOUND The sound button is used to turn on and off the audio output of the internal speaker allowing the operator the ability to hear the detection of the tracer gas By default the audio output is turned off PROBE The probe button is only used in the manual mode tells the microprocessor how many physical lengths of
3. the accuracy goes down with humidity and accuracy being inverses of one another This does not mean that the LHHLD 2002 cannot be used when the humidity is above 20 The wand section contains three independent filters one removes water vapor one removes chlorofluorocarbons and the last removes large particulates 5 5 MOISTURE FILTER Our replacement filter cartridge system removes almost 100 of the moisture from the sample air before entering the sensing compartment This innovative procedure allows the user to quickly assess the daily life span of the filter by simple visual cues A new dry cartridge will be vividly bright blue in color The moisture cartridge will turn pink as it removes moisture from the air see Figure 1 The filter cartridge is still within its useful life but will degrade further to a clear white color if continually used in a high humidity environment or if water is present The useful life of these filters depends on the relative humidity RH of the working environment For example on an average dry day the RH is roughly 20 Under this conditions the filter should last between four to six hours If the relative humidity climbs to 50 RH the single cartridge might last only two to three hours If the humidity climbs to between 50 90 RH the filter may only last one hour Even on the most humid of days these filters can be replaced within seconds or cleared and reused within minutes For information on
4. Dry thoroughly when done SMALL PROBE TIP Clean with compressed air or with soap and water to remove mud and debris Dry thoroughly when done EXTENSIONS Clean with compressed air or with soap and water to remove mud and debris Dry thoroughly when done FILTER Check the filters in handle before every use If the cartridge is pink or whitish in color replace the cartridge following the steps provided below The filter section can be cleaned with soap and water as long as the silica filter is in place and the knurled cap section is tightened firmly CAUTION Do not allow water to enter the charcoal filter 6 2 FILTER REPLACEMENT In order to replace the silica gel filter firmly grip the filter handle with one hand and turn the knurled cap assembly counterclockwise until they separate Once the cap assembly is removed turn the handle over so the filter will slide out using only gravity If the filter does not slide out voluntarily hold the handle upside down and lightly tap the side of the handle against a solid object The filter will slide out With the spent filter cartridge removed ensure there is no foreign material in the handle section If the path is clear replace a new blue silica gel filter Replace the cap assembly using minimal force turning clockwise 6 3 CLEARING THE SILICA GEL FILTER To restore these cartridges to a useful condition dry with a deep blue color as shown in Figure 1 backflush the handheld probe with
5. compressed dry air or dry nitrogen Use the needle probe connected to the front end of the probe handle and the back flushing air chuck assembly connected to the hose Figure 5 The needle probe must be installed in order to defeat the one way check valve and allow air to flow back through the filter Figure 6 below shows the chuck valve attached to a Dielectric air dryer directing clean dry CDA back through the silica This process will take approximately 10 minutes per silica gel filter 11 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR Figure 5 Figure 6 ww k 9 AS 64 BATTERY REPLACEMENT Turn the device over and remove the battery compartment cover using a flat tip screwdriver The fastener reguires only minimal pressure and a 1 4 turn counterclockwise Remove the battery and pull up on the three pin connector This connector is keyed to ensure one way installation Before installing the new battery ensure the power connector is attached to the circuit board Once the battery jack is connected lay the battery in its berth and replace the battery compartment cover NOTE The screw requires minimal pressure and only a 1 4 turn clockwise 6 5 BATTERY RECHARGING The LHHLD 2002 comes equipped with the jacks and adaptors necessary to recharge your unit whether you re in the office or working on site Refer to Table 7 Parts List for a list of
6. heat from heat source An easy way to think about this is to remember how hot you feel when you sweat Air helps to cool your body temperature Table 3 Thermal Conductivity of Gasses shows the for clean dry air CDA as well as its nine most abundant components For example CDA has a TC constant of 0 026 since it s mostly comprised of nitrogen 78 1 that has a TC of 0 026 The next most abundant gas is oxygen 20 0 with a TC of 0 027 This is remarkably close to nitrogen and thus stays very close to 0 026 The third highest concentration in CDA is Argon 0 9 with a TC of 0 018 But since its relative abundance in the atmosphere is so small it has very small impact on the overall of air 5 O 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR NOTE As the numbers increase the TC of the gasses increase with Hydrogen H2 and Helium He being the most thermally conductive It s this distinction between the TC of CDA as compared to the TC of hydrogen or helium that we are interested in Our LHHLD 2002 is designed with two ranges The low range detects gas between 25 and 20 000 parts per million ppm in increments of 25 ppm Mathematically 20 000 ppm is a concentration of 2 The high range is between 2 and 100 Calibration of the LHHLD 2002 is accomplished via the microprocessor Initially when the sample air contains no Zero tracer gas it will draw in 100
7. items that comes standard with this device 12 O 2010 LACO TECHNOLOGIES ING LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK To charge this device using the universal power supply 1 plug in the universal AC power supply to any standard wall outlet and 2 plug in the DC output plug to the device The internal software will detect the presence of the charger and will turn off the detection capability while the unit is in charge To charge this device using the standard 12VDC auto adaptor 1 plug the auto adaptor into the cigarette lighter jack and 2 plug the output jack into the device The internal software will detect the presence of the charger and will turn off the detection capability while the unit is charging The Nickel Metal Hydride NiMh battery is eguipped with a temperature sensing element to ensure the battery will not overheat and explode during the charge cycle Should the ambient temperature be too hot the sensor may cause the recharge the circuitry to shut off prematurely For this reason it is recommended that this unit is charged away from any heat source If the device is unused for an extended period of time the battery will lose 40 of their charge during the first month and 20 every month thereafter It is highly recommended that the unit be recharged before use 6 6 CALIBRATION The LHHLD 2002 is a precision measuring device that requires factory calibration in order
8. probe are attached to the unit This is done to mathematically calculate how long it will take to get a sample from the boot to the sensing elements 8 O 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK CONTROL NAME MODE MODE SAMPLE 58 LCD DESCRIPTION The reset button allows the unit to remain powered but clears all of the internal logic circuitry The device goes through its zeroing routine to determine a new baseline This button is preferred to turning the device off and back on since the sensor remains stable Only press this button in a tracer gas environment The mode button controls the content of the LCD By default the unit is in automatic mode and will show what the sensing elements have detected in both concentration as well as time If the unit is placed in the manual mode the device will continue to draw in samples as normal However when the sample button is pressed the LCD no longer shows time it will only show what the sensors are currently detecting The sample button tells the microprocessor to take one reading Upon pressing this button the microprocessor 1 determines calculates how long it should take for the sample to get to the detector 2 takes the sample and 3 displays the result This is a one shot button meaning that the button must pressed each time new sample is needed The L
9. to ensure sustained and optimum operating performance Calibration frequency is dependent on 1 environmental conditions when using the device harsh environments clean rooms etc 2 user criteria for the device high accuracy vs identifying gas concentrations and 3 the amount of time the device is used once a month vs daily We recommend that devices with high usage or if precision is required calibration should be done at least once a year If the device is used infrequently or accuracy is not as critical factory recalibration can be every two years Calibration is not limited to the recommended calibration schedule If the user suspects inaccurate operation as a result of filters or plumbing being compromised with oil residue oil vapors water dirt petroleum vapors recalibration is recommended During factory recalibration the following value added steps will take place 1 Inspection 2 Light cleaning as required 3 Silica gel filter dried as required 13 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR 4 Carbon filter replaced 5 Intake and exhaust filter replaced 6 Air volume checked and adjusted 7 Temperature sensors checked and adjusted 8 Software updates installed as available 9 Calibration procedure completed 10 ISO Calibration Certificate optional 7 SERVICE If service or calibration is needed contact LACO for a materia
10. CD is a near real time display of the tracer gas the unit has detected The refresh rate is slightly greater than ten times every second Figure 2 LCD ON display Figure 3 After reset 9 Figure 2 shows the liquid crystal display upon pressing the On Off button This screen will remain displayed while the processor power on self test which will last for approximately 60 seconds Figure 3 shows the successful completion of the power on self test or when the unit has just been reset This display is showing the user that the unit 15 attempting to locate zero point of reference O 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR Figure 4 shows the display upon successful completion of the initial zeroing routine This screen will remain in effect until the sensor elements sense the presence of a tracer gas The real time graph is updated once per second and shows 60 seconds of history Figure 4 Completion of Zero routine 5 9 LCD STATUS ICONS There are five small icons shown at the bottom of the LCD screen The icons and their functions are displayed below in the order they appear on the LCD from left to right Table 5 LCD Status Icons BATTERY STATUS RECHARGE STATUS SOUND STATUS PROBE LENGTH 10 DESCRIPTION This icon gives the user a visual indicator of the relative lifespan remaining on the battery Whe
11. CDA The microprocessor is then told that the reading it is receiving is to be referred to as Zero Using known controlled volume of CDA 2 tracer gas scientific grade is injected into closed loop The accuracy of the gas is 2 00 and the detector should read 2 00 This settings is then stored in memory The last calibration point is to draw in 100 scientific grade tracer gas and the reading stored in memory Since the TC of the tracer gas is constant the readings observed are directly proportional to the concentration received Another way to state this 15 that two points make straight line and the more points given the more accurate the straight line will be After the calibration process any concentration sampled will fall on the line Table 3 Thermal Conductivity of Gasses THERMAL CONDUCTIVITY AT 300 K WATTS M K 5 4 HUMIDITY VS ACCURACY As stated earlier water vapor or H 0 is a normal component of air The unit of measure of humidity is known as RH or percent relative humidity An average value of humidity on a normal dry day is 20 On a very humid day it can reach into the nineties or 100 when raining misting The MGD can correctly function with RH levels as high as 50 but any value above 50 results in what is seen as negative gas 6 2010 LACO TECHNOLOGIES INC LACO LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR Another way to state this is when the humidity goes up
12. OGIES INC
13. centration yet also provides other useful information such as chemical name chemical symbol percent in normal air concentration in parts per million parts per billion and atomic weights The naturally occurring elemental gasses are Nitrogen N2 Oxygen 02 Argon Ar Neon Ne Helium He Krypton Kr Hydrogen H2 and Xenon Xe NOTE The subscript of 2 in the atomic symbol shows that the gaseous form of the element normally occurs when it is bonded with another of its own kind If the elemental gas does not have a subscript that gas has a full outer electron shell and will not react or bond with any other element These few elements are known as Nobel gasses Table 2 Gasses found in Air GAS PRESENT MOLE PARTS PER PARTS PER PARTS PER ATOMIC WEIGHT SYMBOL PERCENT MILLION BILLION MOLE GRAMS PER MOLE 78 082700 780 827 780 827 000 4 7 E 23 28 0135 20 945700 209 457 2 09 457 000 1 26 E 23 31 0099 Argon 0 934000 9 340 9 340 000 5 62 E 21 39 9480 r Carbon Dioxide 0 035000 350 000 2 11 20 44 0100 0 001718 17 18 17 180 1 03 19 20 1797 Helium Methane Krypton Hydrogen Nitrous Oxide Xenon Ozone 0000053 fo am o 000009 o e oppe um All the gasses listed in Table 2 as well as those that are not possess an intrinsic property called thermal conductivity TC Thermal conductivity s unit of measure is watts m K One way to explain TC is its ability to absorb heat or whisk away
14. cleaning filters see 6 3 CLEARING THE SILICA GEL FILTER Figure 1 Spent Cartridge Dry Cartridge 5 6 METHANE VS ACCURACY There are certain gasses that the LHHLD 2002 cannot eliminate and methane CH4 is the most significant Just like humidity methane has a warming effect Referring to Table 3 Thermal Conductivity of Gasses the higher the TC number the greater the cooling effect Methane s small value causes it to act like a negative tracer gas It has a warming thermoconductivity or TC What makes methane so problematic is that it is very small and can pass through most filters without detection 7 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR or elimination The only way to eliminate methane is to burn it off Unfortunately in a handheld device burning off stray gasses is not an option Other gasses such as Propane C2H8 Pentane C5H12 and Ethane N20 and Ozone 03 and most other CFCs also have a negative TC TC However these gasses are easily eliminated by the second filter in the wand section Unfortunately the crushed activated charcoal has a limited useful life when used in an environment of high organic compounds such as those mentioned above Therefore we strongly suggest returning the LHHLD 2002 for recalibration at least once a year During factory recalibration the silica gel filters are cleared and the other two filters are replaced
15. ecure with the quarter turn fastener 4 First plug the universal power supply into an AC wall outlet Then plug the other end into the device NOTE Charge battery for two hours before operating the LHHLD 2002 for the first time 5 Complete the warranty information card supplied with the instrument and return it for your warranty registration 6 Check the silica gel filter Ensure the color is blue Refer to 6 2 FILTER REPLACEMENT for filter changing instructions or 6 3 CLEARING THE SILICA GEL FILTER for filter clearing instructions 3 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR 5 BASIC OPERATION 7 Before turning on the device connect either the needle probe or one of the extension rods to the probe assembly Then connect the probe assembly to the detector The probe assembly has check valves that keep the ambient air from deteriorating the effectiveness of the silica gel filter 5 1 OVERVIEW The LHHLD 2002 is portable leak locating and pinpointing device that detects both Hydrogen H2 and Helium He when these are used as a tracer gas in a multitude of pressurized systems The characteristic of being lighter than air allows both Hydrogen H2 and Helium He to penetrate small leaks rapidly and permeate through the densest soils and pavements quickly Our helium detector products are used today in many industries and applications including militar
16. eriods and conditions will apply Refurbished and Rebuilt Rotary Vane Vacuum Pumps 6 months Refurbished and Rebuilt Helium Leak Detectors Turbo Pumps Electronic Repairs and Vacuum Gauges 3 months For LACO manufactured products LACO will honor claims in the event of failure of goods other than expendable and consumable parts as a result of such a defect provided that claim is made to LACO within twelve months from the date of delivery LACO DISCLAIMS all other express warranties and all implied warranties including implied warranties of MERCHANTABILITY and FITNESS FOR PARTICULAR PURPOSES Items not covered under warranty included damage due to shipping process conditions or negligence LACO also DISCLAIMS damages due to normal wear failure to follow LACO s recommended maintenance intervals incorrect maintenance disregard of operating instructions inappropriate working conditions improper materials chemical or electrical influences faulty installation or other causes beyond the control of LACO Modifications or repairs made the Customer without LACO s written consent render this warranty inoperable Repair work warranties do not cover items that were not replaced or repaired as part of the charged repair services LACO products must be returned to LACO for warranty and other servicing and the customer will be responsible for all shipping insurance and other costs in connection with sending the goods to and from LACO I
17. l return authorization number MRA The device should be boxed securely and contain all contact information including return shipping information written statement of the problem or symptoms should then be included The MRA number must be on the outside of the package or indicated on the shipping label 8 PARTS LIST 8 1 STANDARD PACKAGE The following components are standard with the LHHLD 2002 Upon initial receipt of the LHHLD 2002 check to ensure that all items have been received Numbers in parenthesis indicate the quantity Table 7 Parts List PARTNUMBER PART 84673 100 24VAC Universal AC charger w North American power cord 14 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK 8 2 REPLACEABLE PARTS If for any reason a field replaceable unit FRU is reguired the following list of items is provided to ease the ordering process NOTE Only user replaceable items are listed If you require an item not this list you must return the device for calibration Table 8 Replaceable Parts PARTNUMBER PART 83220 Moisture cartridge 82492 Spare battery 8 3 ACCESSORIES The following list contains non standard accessories recommended for use with the LHHLD 2002 Table 9 Accessories PART NUMBER PART 882 0007 Headphones NA Overhead wire boot N A Non metallic probe assembly Downloadable software revisions 15 2010 LACO TECHNOL
18. n case of LACOS breach of warranty or any other duty with respect to the quality of any goods the exclusive remedies therefore are at option 1 repair 2 replacement or 3 in appropriate cases payment of or credit for the purchase price less reasonable depreciation on authorized return of the goods 1 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR 2 SAFETY CAUTION Itis imperative that the user of this device observe all safety guidelines listed below to prevent personal injury property damage or damage to this detector Do not operate the device if it has been damaged Refer to qualified factory service personnel referenced under Service Information Do not disassemble the device doing so will void your warranty Only qualified factory service personnel should perform repairs Do not draw water into the helium detector Water vapor in the air is normal and the silica filter is designed to eliminate this amount of moisture However water will not only adversely affect the unit s operation but may cause sever damage Water found inside the unit will void the warranty e Use precautions when operating the detector in rain snow or adverse conditions Although the detector is water resistant it is not waterproof Do not allow water to accumulate on the faceplate as it could migrate into the electronics Do not use the probe tip to dig in
19. n the battery drops below 1 4 a warning beep will sound The unit will automatically shut off when an empty battery is shown The recharge status icon indicates the status of a unit as it is recharged If the unit is recharging the icon will change to a lightening bold When recharging is complete the icon will display plug The mode icon will display one of the two possible modes of operation automatic or manual When disabled a device default in order to conserve the battery the sound status icon shows an X through the speaker Press the sound button to enable the audio output The probe length icon is only used in the manual mode When the sample button is pressed the microprocessor takes reading based on how many lengths of probe are being used This icon shows how many lengths the timing based on the lengths used and the lengths displayed O 2010 LACO TECHNOLOGIES INC LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK 6 MAINTENANCE 6 1 CLEANING AND INSPECTION Table 6 Cleaning and Inspection PART INSTRUCTIONS INSTRUMENT Clean away any debris or moisture accumulation with a clean soft moist not wet cloth Dirt or sand can scratch the lexan protective lens over the LCD Check exhaust ports on the top right side of the unit small brass fitting for any obstructions COLLECTION BOOT Clean with compressed air with soap and water to remove mud and debris
20. the soil or in any manner other than directed in this manual Although this device has been designed to operate with batter voltage as low as 6V do not operate the detector when the battery indicator displays 1 4 battery or less False readings will occur when operated under this conditions See 6 4 BATTERY REPLACEMENT for replacing the battery or recharging the battery 3 SPECIFICATIONS Table 1 LHHLD 2002 Specifications COMPONENT DESCRIPTION DIMENSIONS LxWxD 33 7 cm x 12 3 cm x 8 3 cm 13 3 in x 4 9 in x 3 3 in WEIGHT LHHLD 2002 only 1400 grams 3 1 Ibs Shipping weight 6800 grams 15 0 Ibs TEMPERATURE RANGE 10 lt 45 14 to 113 1 000 000 PPM 100 SELECTIVITY Hydrogen H2 Helium He 2 2010 LACO TECHNOLOGIES INC LACO LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR COMPONENT DESCRIPTION ROM 512 KBytes rom 4 PREPARATION 1 Upon delivery immediately inspect the LHHLD 2002 for any physical damage that may have been caused during shipping NOTE manufacturer s warranty does not cover damage caused in transit You must notify your carrier immediately for any damage claims 2 Turn device over and open the battery compartment door Remove the batter to expose the device information placard Write the unit serial number on the warranty information card 3 Connect the battery plug to the main logic board Close the battery compartment door and s
21. y RF systems high voltage AC power systems high definition television chemical manufacturing cellular and analog telecommunication and industries utilizing above and below ground storage tanks 5 2 DISCLAIMER The Occupational Safety and Health Administration OSHA states that the lower explosive limit for hydrogen H2 gas is under 5 Any concentration above this level whether intentionally mixed or accidentally trapped confined space is highly explosive and unstable Since the LHHLD 2002 is capable of detecting both Hydrogen H2 and Helium He gas without any operator intervention we recommend that if you do use Hydrogen H2 gas mix the remaining 96 with Helium He gas for 100 usability and added safety 53 THEORY OF OPERATION The LHHLD 2002 is a 16 bit microprocessor controlled precision instrument that operates on the principle of changing thermal conductivity to locate a specific tracer gas as well as quantifying its local concentration Air or what we call air is actually made up of a range of gasses Some of those gasses are pure elements some are naturally occurring simple compounds while others are complex man made compounds Table 2 Gasses Found in Air shows a list of the twelve most abundant gasses that comprise what we term as air The table has been A 2010 LACO TECHNOLOGIES INC LACO LEAK DETECTOR MANUAL LHHLD 2002 UNDERGROUND HELIUM LEAK DETECTOR arranged in decreasing order of con
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