Xentaur Corporation LPDT User`s Manual
Contents
1. 44 Appendix J Return Authorization Request 45 vi Section 1 Introduction 1 0 Overview of the LPDT The LPDT is a microprocessor based 4 20mA loop powered 2 wire hygrometer for measuring moisture content in gases in the range from 100 C to 20 C The measurement is displayed on the instruments custom LCD and is trans mitted by varying the current drawn 4 20mA from the power supply The current varies linearly proportional to the selected measurement units An optional digital output is available which modulates demodulates the 4 20mA loop line without interfering with its operation With this option the LPDT is capable of communicating with properly equipped Personal Computers or other RS 232 capable con trollers Three front panel buttons provide the user with a wide variety of features The LPDT s advanced design allows it to be housed in a small stainless steel enclosure behind the sensor probe thus the instrument and sensor are a single integrated unit The LPDT uses the Xentaur HTF sensor which is encap sulated in sintered stainless steel thus it is capable of com ing into contact with a wide variety of environments However one should keep in mind that the sensor is a sensi tive device and it should be handled accordingly page 1 LPDT User s Manual page 2 Section 2 Sensor and Sampling Technigues 2 1 Precautions using the sensor The Xentaur HTF Al sensor i2. Observe the appropriate electrical safety codes and reg ulations If weather proofing is required consult your representa tive for an optional cover 3 1 1 Electromagnetic Compatibility Considerations The LPDT has been designed and verified by testing to meet the requirements of the EC Council EMC Directive 89 336 EEC for Industrial Scientific amp Medical equip ment The sensor ground LPDT housing is isolated from the 4 20mA loop however they are also shunted with a 2000pF capacitor and a 33V Transient Voltage Suppressor this prevents electrostatic buildup noise pick up and in conjunction with the internal fuse protects the instrument from over voltage inputs Please consider the following electromagnetic interference issues during installation In order to provide an acceptable noise environment for the LPDT or any other digital equipment in the proxim ity of inductive loads it is recommended that there be varistors placed across the inductors to keep down the high voltage spikes during transitions page 13 LPDT User s Manual Any circuitry which is activated by relay contacts should account for the contact bounce one simple debouncing method is placing a capacitor across the relay contacts AC power wiring should be routed as far away from the LPDT and its wiring as practical 3 2 Instrument Technical Specifications Enclosure sesess seee Dimensions amp Weight Pressure operating r
3. Dav select units Cancel Calibration calibration values are not changed Viewing Sensor Temperature i minut select units Calibration Menu XENTAUR LPDT XENTAUR LPDT numbers calculating En eLo Viewing Serial t leg Number E 3 S n 20 Press together to S o 1 RESET the Instrument v FE Then guickly press and hold 85 MODE to go to Set Up State LEGEND 1 Arrows leading out from below a button depict the flow as a result of pressing the button 2 Arrows leading out of other locations depict flow as a result of completing a function or a time out 3 A slash f in the display area is used to depict two alternately shown flashing back and forth messages page 31 LPDT User s Manual Set Up State User Interface flowchart Appendix B SHUN 1070 T5 JUBWOW BJOJUMOUSS A V G N D y Spuooes 10 pesseJd suopnq ou J jsn py eDueJpiN uoneiqie 1 9 10 SS T unless you are replacing the sensor OD 33 3 uojenusje S9 HIX 001 G1X CAUTION These parameters are set properly at the factory to correspond to the shipped sensor Do not modify them ayeusaye ou SI 919U1 xuejg SI yneyap A101984 O d l l 4 du l 4 0 Sd EN D 981 lt gt Wdd 4 YULIA jurodwep Bui ejdsip ueuw moys O Silun ejeuJeje pesseJd JAGON UHM dn 1amog JUSLUNJISUI p
4. If pressure regulators shut off valves etc are used upstream of the sensor make sure these do not contain rubber or other hygroscopic materials 2 4 Troubleshooting unexpected readings If erroneous readings are suspected on a newly acquired instrument compare the serial number engraved on the sen sor sintered filter to the one stored in the instrument mem ory The two should be the same if they are not the instrument may not be calibrated with the installed sensor To troubleshoot other problems identify the unexpected reading category in the following table and consider the possible causes and appropriate diagnostic action and rem edy page 9 LPDT User s Manual Troubleshooting unexpected readings table spans 2 pages Symptom Possible Cause Reading is not changing Slow Response Condensation in sample system 1 Water vapor in the system 2 Flow rate too low 3 Sample pipe too large and or too long 4 Unsuitable sample pipe material 5 Leaks 6 Hygroscopic materials in sample system Dry Reading SpanCheck wrongly set or faulty sensor Wet Reading Display Shows co NE Leak in system or use of unsuitable pipe Comparison of readings with manual cooled mirror instrument Prolonged exposure to wet gas Display Shows cu mu Display Shows orn 1 Instrument Failure 2 Short circuited sensor 1 Instrument failure 2 Open circuit on
5. niques Section 3 describes the instrument s electrical mechanical and user interfaces This manual is intended for those already familiar with the installation use and maintenance of ana lytical or process instrumentation Those acquainted with other Xentaur dewpoint measurement products such as the XDT or the XPDM will benefit from the commonality of the user interface LPDT User s Manual Warranty Xentaur instruments are warranted to be free from defects in workmanship and materials Liability under this warranty is lim ited to servicing calibrating and replacing any defective parts of the instrument returned to the factory for that purpose Fuses are specifically excluded from any liability This warranty is effective from the date of delivery to the original purchaser The eguipment must be determined by Xentaur to have been defective for the warranty to be valid This warranty applies as follows one year for electronics one year for mechanical failures to the sensor six months for calibrations If damage is determined to have been caused by misuse or abnor mal conditions of operation the owner will be notified and repairs will be billed at standard rates after approval Maintenance Policy In cases when equipment fault is suspected please notify your representative of the problem be sure to provide them with model and serial numbers If the problem can not be resolved then ask for a Return Authoriza
6. 400 u ejnsdeous 10sueg SIQEAOWSH page 34 Appendices Appendix D LPDT Electrical Connections Operation with Wall Transformer Methods of Using and Interfacing the LPDT Dewpoint viewed on Instrument Display 10 33VDC Et 101 120V cami 8 or am 25 220V 4 aS Operation with DC Power Supply Dewpoint viewed on Instrument Display and available as 4 20mA output CM maintain 10 33VDC here 4 20mA VDC bint Transmitter Voltage or Current Operation with Relay Option Board Dewpoint viewed on Instrument Display and available as 4 20mA output Relay Option Board Provides two independent Relays with programmable trip point and hysteresis DC or AC supply Operation with Remote Option Board Dewpoint viewed on Instrument Display and available on remote Display Buttons Relays Output RS 232 Output Power Supply Operation with DC Power Supply 85 265VAC Dewpoint viewed on Instrument Display and available as Voltage output Operation with Multichannel Option Board Dewpoint viewed on each Instrument Display and available on remote interface Multichannel Option Board RS 232C to Computer i bint Transmitter d eo 12 33VDC L 0 4 2V output D
7. If in doubt call your representa page 3 LPDT User s Manual tive Do not disassemble the porous metal filter encapsula tion as this will damage the sensor and void your fac tory warranty Prior to installation of the probe ensure that no contam inants are present in the system e g oil liquid water 2 2 Sensor Technical Specifications Type Hyper Thin Film high capacitance Al 03 Dewpoint range XTR 100 1489F to 68 F 100 C to 20 C XTR 65 85 F to 68 F 65 C to 20 C Capacitance 15nF to 200nF Accuracy 5 5 F 43 C Repeatability 0 99F 0 5 C Response time see graph in Appendix I Temperature range 10 C to 70 C Sample Flow range linear velocity 1ATM Static to 100m s Storage temperature 40 F to 176 F 40 C to 80 C Mechanical encapsulated in 100 sintered stainless steel Calibration method SpanCheck sensor saturates at dewpoint above 68 F 20 C NIST NPL traceable multi point factory calibration available optionally 2 3 Sensor Installation amp Sampling Techniques Keep in mind that the moisture content at the sensor is not only due to the moisture of the gas being measured but also due to desorption of water from tubing trapped moisture at the interconnec
8. Mode and hold the MODE key pressed while the unit is initializing Refer to Appendix B for a flow diagram of the SetUp State page 24 Section 3 Instrument The setup state provides nine capabilities each one con trolled from its own mode Depressing the MODE button navigates through the modes in the following order Se lect Alternate Display Units lt Select Sensor Type lt Set Measured Attenuation of Sensor at a Low Dewpoint lt OSet the Low Dewpoint at which the Attenuation was measured lt Set the Calibration Mid range Adjust lt Perform a Test and Verification of the Analog Output lt Set dewpoint cor responding to 4mA of Analog Output lt Set dewpoint cor responding to 20mA of Analog Output lt Lock Unlock the instrument lt back to Select Alternate Display Units These nine functions are explained in their respective sec tions which follow Changes can be made only to an unlocked instrument the changes are stored when the MODE button is pressed and retained even if the unit is turned off 1 Display of alternate units In this mode a second engi neering unit can be chosen to be displayed alternating with the engineering unit selected in the operating state for example a dewpoint can be displayed alternating with the sample temperature or dewpoint can be alter nately shown in C and in PPM 2 Selecting the sensor type In this mode the user can select the software matching the type of s
9. grams of water per standard cubic meters both in Natural Gas they are computed according to data derived by IGT Research Bulletin 8 tak ing into account sensor pressure Note that the analog output is linear to the selected engi neering units therefore be mindful that while scrolling through various units the analog output may change even though the measured dewpoint is stable The PSI legend flashes at the bottom of the display when there is pressure correction in the computation of the dis played values refer to appendix E 3 4 4 2 Viewing Temperature at the Sensor In this mode the user can view the thermodynamic tempera ture at the dewpoint sensor inside the sampling chamber this is indicated by the flashing TEMP legend on the lower left of the display The available units in which to view the temperature are C and F The UP and DOWN buttons switch back and forth between these units Pressing the MODE button changes to the Start Calibration Mode page 20 Section 3 Instrument 3 4 4 3 Start Calibration SpanCheck Mode The instrument is calibrated at the factory with the sensor it is shipped with and does not need to be re calibrated prior to installation Instrument calibration is recommended in approximately 12 month intervals the XTR65W sensor should be re cali brated after prolonged exposure to liquid water Simply fol low steps 7 of the procedure below removing the sensor from the sample gas
10. lets you change a parameter by showing the word SET in the upper left corner of the display Be careful not to change any parameter inadvertently C F appear simultaneously to indicate the sensors attenuation in decibels Values larger than 1999 or smaller than 0 01 are dis played in powers of 1055 As required either a 105 or 107 will appear above and to the right of the dis played value the value will be rounded off to 3 digits The display will show rnb out of ranGe if the num ber to be displayed is larger than 1 999 000 Twelve examples follow for each the number and units desired to be displayed are shown in italics depicted immedi ately below them is the resultant 312 digit LCD display 1104 2 20 C 68 F 23 612 ppmV 0 103 n 8 e 5 anu PPM uc m F 2 I Il 1 DEWPOINT DEWPOINT DEWPOINT DEWPOINT LBS 17 688 3 grams H O meters 2 000 000 100 C 148 F i 16 q R no i U U C 4 B F DEWPOINT GAP DEWPOINT DEWPOINT 0 013 849 0 000 921 15 0 000 014 75 lbs H O mmSCF grams H O meters 0 000 000 1 ppmV inc 102 x103 103 iaa 521 DiS 0 DEWPOINT DEWPOINT LBS DEWPOINT G M page 18 Section 3 Instrument 3 4 3 Push Buttons Three push buttons are located on the front panel P d xit MODE button UP button DOWN button Each button is marked with an icon engraved above it In general the MODE button navigates through the different
11. sensor For non sensor related problems e g no reading on instru ment refer to section 3 5 page 10 Section 2 Sensor and Sampling Technigues Troubleshooting unexpected readings continued from previous page Symptom Diagnostic Remedy Reading is not changing Condensation will occur if the temperature of the sample system at any point is below colder the dewpoint temperature of the sample gas Once having formed the sample reaching the sensor will have a dewpoint equal to the temperature of the condensation regardless of the dewpoint of the sample at the sample point Slow Response It is usually more satisfactory to bleed a sample gas at atmospheric pressure through the sensor sampling chamber and to use 1 8 3mm o d sample pipe See below re sample pipe material also see section 2 3 Dry Reading Wet Reading Verify SpanCheck or return sensor for full calibration to your representative Cure the leak or replace unsuitable pipe with copper or stainless steel Flexible con nections should be made with PTFE pipe NEVER use rubber or plastic pipe This type of indicator reads about 10 C dry at about 50 C dewpoint due to tempera ture gradients within the device The error increases at drier levels Display Shows co NE Dry the sensor install sensor in either a known dry gas stream i e instrument guality air or dry nitrogen or place sensor in a dry can or bottle of d
12. stream Make sure the gas stream is depressurized before removing the sensor to avoid injury It is recommended to keep the sensor exposure to room air as short as possible to avoid super saturation of the sensor While super saturation is not damaging to the sensor it will prolong the initial dry down time after you install the sensor in the sample stream Therefore remove the sensor from the packaging container only after you are ready to proceed with the calibration procedure and install the sensor in the sample stream immediately after the calibration procedure is completed If you are not ready to use the sensor right away after calibration put the sensor back in the shipping container for dry storage The instrument must be calibrated with the sensor it will be used with The calibration procedure takes advantage of the designed saturation level DSL feature of the sensor and is executed by the instrument computer by performing the fol lowing steps 1 If the instrument is locked and a calibration is attempted it will display Lol and will not perform the calibration To unlock the instrument consult section 3 4 5 9 2 Push the MODE key a few times until the display page 21 LPDT User s Manual show s CAL 3 Press the UP button The display will show LnF prompt ing you to confirm that you want to start the calibration procedure You can abort the calibration procedure by pressing the MODE key 4 Remove the sensor f
13. the LPDT are shown in Appendix D Please observe good electrical safety and grounding prac tices when connecting any electrical equipment connecting one end e g negative of the power supply to earth ground is advisable After the installation is complete proper detection by the user s equipment of the 4 20mA output may be tested using the Analog Output test feature of the LPDT see section page 16 Section 3 Instrument 3 4 5 6 3 4 Operating the Instrument 3 4 1 Starting up The instrument is ready for use as soon as the power cable is installed When power is applied the instrument will initial ize its program and for a moment display En then it will enter the Operating State If the MODE button is held pressed while the instrument is performing its power up ini tialization it will enter the Set Up State which allows the user to select operating variables of the instrument To accommodate a variety of installation possibilities the LPDT front panel may be rotated 360 by gently pressing down on the spring loaded face plate and turning it to the desired position 3 4 2 Display Conventions 1 To display characters with the 7 segment numeric dis play the following pseudo alphanumerics are used Numbers 0 123456789 0123456189 Letters ABCDEF GH IJ LNOP QRS TUXYZ AbCSEFGH I ULAoP Gr SEU Ye Symbols Powe d 2 The instrument will indicate whether a particular mode page 17 LPDT User s Manual
14. the user should adjust the analog output low amp high ranges such that the output range is better suited to the measurement of 10 to 100 ppmV It may be useful to select the low and high ranges to be 5 and 150 ppm respectively thus out of range conditions will be detected properly Then the low range will be set to 5ppmV which is 65 5 C dewpoint and the high range will be set to 150ppmV which is 38 5 C dew point Now the current loop output will be 4 55 to 14 48 mA in the range of 10 to 100 ppmV the 10mA variation is more than sufficient for a good measurement by the user s equipment One may carry out similar calculations for LBS or G M3 and choose the appropriate settings While making these computations it may be useful to obtain a copy of Xentaur s dewpoint calculator this is a Microsoft Win dows program which simplifies the process of converting dewpoint measurement units It is available at www xen taur com If you are not certain how to carry out such calcu lations send by e mail to xentaur xentaur com or by fax to 516 345 5349 your system specifics and some one will get back to you with appropriate analog output settings In general if the dewpoint is monitored in C or F there is no need to change the factory default 100 C to 20 C set tings because the 4 20mA provides sufficient resolution to measure the output better than the specified accuracy of the sensor page 41 LPDT User s Manual
15. yoo e jo s um s GuiGueyo ueuw sie dde 303 page 32 Appendices User Interface Flow Diagram Set Up State continued from previous page JO jjnsau e se moj eui 19id p uollnq e MoJeq wo 1no UIPEJJ SMOJIV seBesseui yuo pue yoeq UIUSEJJ UMOUS jeyeujeye ow 1010 oj pesn si eee Aejdsip y ul USEJS VZ uollnq y Guissaud y eso Jim uollnq 1 uli Jo sseud XOIN 901 44 A V pexoo SI 1Inej p A109024 peBueyo eq jou UB suajalwesed lu uunilsu pexoo ueuM jueuinaisul eui YDOJUN JO 420 9 L0 A V 0 02 S jnejop indino Gojeue pue ufu o 5 jurodmap 199 U 9 10 001 SI nejep Arojoe4 27 indino Gojeue jo pue moj BuipuodseLioo julodmap 19S vwoz USUM OQAOL 9q 0 1dd7 IE 9BEJJOA ulnululul aansu3 O0 dno Gojeuy 1S9L GN3931 page 33 LPDT User s Manual I Drawing Ica LPDT Mechani Appendix C UOUBIM 8 10 STE 1 750 SET WD ISd l1NIOdM3G a Ymy diN3L Wdd 8 8 8 I OH 801x 13S YNVLNAX Mo Se Ma www xentaur com oint Transmitter JeUIej8J UO M8JOS YDE yo 9 S Jeusew UO SU LY OEZ pe wwg z x Wp 9L v Bun O v UCLA s ssejureis POJSJUIS
16. C or AC supply multiple units connected on the same two wires page 35 LPDT User s Manual Appendix E Sensor SpanCheck Theory of Operation The Sensor is constructed as a capacitor whose dielectric consists of porous Aluminum Oxide as well as the gas that has entered in the pores of the Aluminum Oxide The plates electrodes of this capacitor are an aluminum substrate and a porous gold layer deposited on top of the Aluminum Oxide the porous gold electrode allows transfer of gasses into or out of the Aluminum Oxide pores The capacitance due to the Aluminum Oxide is always con stant while the capacitance due to the gas varies according to the gas content and pressure Since the dielectric constant of water is orders of magnitude larger than that of any gases being measured the quantity of water vapor present in the pores changes the capacitance of the sensor to a much greater extent than any other system variable For the same reason the extremely large dielectric constant of the water molecule any capacitance variations arising from the Alu minum Oxide such as changes due to temperature are insig nificant in relation to the capacitance due to the water content Thus the sensor capacitance varies greatly in pro portion to the water content in the surrounding gas The sen sor 1s designed such that the relationship of the quantity of water and the resultant capacitance has an S shaped curve At the extrem
17. Install the sensor in the sample cell or adapter fitting or put it back into the packaging container for later use The instrument will retain the calibration even if the power is turned off Under certain conditions an over super saturated sensor may need to be completely dried out before a calibration is performed Symptoms of these conditions are a sensor that will not go through the SpanCheck function to the End display or a sensor that will not dry down after calibration To dry install sensor in either a known dry gas stream i e instrument quality air or dry nitrogen or place sensor in a dry can or bottle of desiccant and seal the container from outside air the shipping container is designed for this pur pose After a minimum dry out period of 24 hours proceed with the calibration procedure of your choice SpanCheck calibrates sensors by using micro climates Please contact your representative if you have any questions about how to create such micro climates A perfectly acceptable and accurate for calibration micro climate may be created for the XTR100 and XTR65 sensors by cupping the sensor in the palm of one s hand during the SpanCheck procedure Remember that the micro climate does not have to be accurate it just has to be higher than the designed saturation level The dewpoint of the micro cli mate within the fingers is usually higher than the dewpoint of the room air and probably well above the 20 C upper r
18. LPDT is unpredict able its front panel may be rotated 360 to allow easy reading of the display Press down gently on the spring loaded face plate and turn it to the desired position page 15 LPDT User s Manual The sensor can be removed from the LPDT by unscrewing it Make sure that the sensor is securely fastened to the LPDT the tension washer should be compressed so that it does not come loose during use 3 3 2 Electrical Installation The LPDT will operate properly with 10VDC to 33VDC at its input if this voltage is exceeded the internal fuse may blow When selecting the power supply voltage do not neglect the drop across any current measurement resistor and wiring in the loop The connector is a standard 2 1mm x 5 5mm 12mm minimum barrel length DC power jack an internal diode bridge accommodates either polarity The LPDT may be powered using an off the shelf wall trans former with 2 1mm connector or from a power supply using the provided connectorized cable The provided cable is terminated with a connector which has a retainer the retainer may be used to secure the connector to the LPDT thus avoiding accidental disconnection The LPDT will draw 4mA to 20mA from the power supply depending on the dewpoint being measured The dewpoints corresponding to 4mA and to 20mA are user selectable in between the current will vary linearly to the selected engi neering units see appendix G Various strategies for interfacing with
19. Relationship of 4 20mA output and instrument reading in ppmV orLBS o o e e e e S 289 1 LBS 0 C 6063 8 ppm O o e 8 o 49 3 LBS 20 C 1019 3 ppmV Instrument reading in ppmV 100 1 97 LBS 50 C 38 83 ppm 10 Instrument reading in LBS of H2O million cubic feet Op KA LBS 60 C 10 66 ppmV 10 o a lt lt lt lt lt 9 5 amp E E E E N 16 19 vt vr 4 20 mA output page 42 Appendices Appendix H Uncertainty in LBS amp ppmV calculations 48 1000 44 900 38 800 34 700 29 600 2i 500 19 400 15 300 x 8 10 200 E 5 fa 5 100 90 PE 70 O o o E 60 u E25 50 gt 57 E o gt I o m 30 55 s 55 0 1 S g 2 5 6 4 S o o S gt O 0 5 a Q 9 a 8 o 7 2 6 0 25 5 5 A c g EA E l 5 0 1 KA 2 o 0 05 1 0 9 0 8 0 7 0 6 0 5 o 10 o wo o wo o wo o wo o Y 8 9 9 Y Y 9 o 9 9 tS 5 9 Measured Dewpoint C page 43 LPDT User s Manual ime Sensor Response T Appendix I ou 001 S6 06 S8 08 GZ OL S9 09 GG Sr SE 08 Sc O2 SL OL G 0 obueuo deis jo 9 66 4 oDueuo dais JO S9 winugiinba jo s
20. anCheck do Trying to calibrate an undefined 8 see Calibration instructions sensor 2 E SEn eLo Sensor reading is too low to be a satu rated sensor for SpanCheck Err EEP EEPROM write cycle not completed if this persists return for service Lot Attempting to modify a Jocked unit unlock unit see set up mode cob number can not be displayed in 3 5 digits E 10 C SH F An XTR 65 sensor is measuring less E w flashing than 70 C or 94 F dewpoint E DEWPOINT 5 PSI flashing Pressure correction is enabled when dew ZEA Turn on message Xentaur Greek E X Legend denotes alternately flashing messages page 29 LPDT User s Manual The instrument contains a fuse which may open if the instrument is subjected to voltages exceeding the specifica tions Under these circumstances the unit display will be blank and the instrument will not draw any current when powered up The fuse is not user replaceable therefore the LPDT must be sent to your representative for servicing page 30 Appendices Appendix A Operating State User Interface flowchart 30 seconds anywhere other than calibration without a key press Power ON initialization and sign on message O XENTAUR a flashing n PSI legend 1sec tA means pressure correction is being applied see appendix F O XENTAUR Viewing Dewpoint XENTAUR LPDT
21. and the dewpoint as well as temperature and pressure if installed can be read In the digital mode multiple units can operate on the same loop cable as a multi channel instrument Alarms The 4 20mA signal or the digital output may be used by an external device to operate relays Isolation Sensor and case are isolated from the current loop but are shunted with a 33V transorb and 2000pF capacitor 3 3 Installation 3 3 1 Mechanical Installation The LPDT has two thread sizes for mounting to the sample cavity consult the sensor installation section where the dewpoint will be measured Various adapters are available for direct connection into existing system openings Ask you representative for a Sample Cell if you do not have the ability to provide an appropriate sample cavity mounting If the 4 x16 thread is used then the LPDT will seal against the wall of the sample cell with the provided Viton A O ring If the 14mm x 1 25 spark plug thread is used then an addi tional Viton gasket must be installed to provide the proper seal Ask your representative for this gasket it is available free of charge The LPDT is light enough such that either thread will mechanically support the whole instrument To prevent any leaks tighten the LPDT into the sample cavity with a 17 7 wrench 1 8 turn past finger tight to assure metal to metal contact Since the tightened positioning of the
22. ange Mechanical connections Electrical connections Cable iussus Power Requirements Input resolution Indicators CE PPM LBS H2O mm sef gm H O M Engineering units Controls Qutp ts asnata na Stainless Steel optional weather proof cover is avail able 2 Dia x 4 75 long including sensor amp connector see appendix C 0 51bs Standard 500 PSI 34 bar Optional 5 000 PSI 340 bar 14mm x 1 25mm threads and 34 16 threads 2 1mm x 5 5mm 12mm minimum barrel length power jack with retainer Two conductor cable 12 4m provided 10 to 33 VDC polarity independent the instrument draws 4 20mA depending on measured dewpoint 0 1 C dewpoint 3 5 digit LCD with custom legends 3 push buttons user s selections are stored in EEPROM Analog and digital outputs are available from the LPDT A 4 20mA drawn by the instrument from the power supply The 4 20mA is linear to the selected engi neering units the range is programmable Output resolution is 0 1 C dewpoint B The instrument can supply digital output by modulating the 4 20mA loop line The timing and format of the data conforms to RS 232 however to interface to a PC or other RS 232 device an optional adapter is required page 14 Section 3 Instrument In the digital mode the LPDT can be remotely operated
23. ange of the sensor On a dry day one may need to exhale in the hand before cupping the sensor to guarantee a high dew point The sensor should be warmed up close to body tem perature before performing this procedure Care must be taken that the sensor temperature is not below the tempera page 23 LPDT User s Manual ture of the hand as in such case condensation could occur and super saturate the sensor For the same reason avoid exhaling directly onto the sensor 3 4 4 4 Viewing Serial Number Mode In this mode the user can view the serial number of the sen sor calibrated and shipped with the instrument This number is also engraved on the stainless steel sintered filter of the sensor element The display shows the serial number by alternately displaying z5n and the number If the number is larger than 1999 then it is displayed in 2 parts first part is the thousands signified by the x10 legend in the upper right corner of the display and the second part is the units For example serial number 12345 will be shown as x x108 z n ic 4 UI Pressing the UP and DOWN buttons simultaneously resets the instrument this is useful for restarting in the set up state bv holding the MODE button in installations where power can not be turned on and off easily Pressing the MODE button changes the unit to the Viewing Dewpoint Mode 3 4 5 SetUp State To enter the Setup State power up the unit or reset it from the serial number
24. d for in situ installations are pure gases output of des iccant dryers for instrument air glove boxes etc For most other applications in situ installation should be avoided for the following reasons Sample conditioning is almost always necessary to avoid exposure of the sensor to liquid water and other contaminants such as hydrocarbons which may dam age the sensor over time Variations in line pressure affect the reading of the sen sor because dewpoint varies with pressure If the gas line is under pressure it is more likely that water condensation occurs which may damage the sen sor page 5 LPDT User s Manual Under a pressurized system removal of the sensor with out the installation of isolation valves can be dangerous If in situ installation is required bypass mounting is prefer able make sure to install the sensor at the upper surface of the gas line to minimize its exposure to liquid water should condensation occur the XTR65W sensor is best suited for these applications Also consider the need to isolate depres surize before installing or removing the sensor 4 20mA le ll OmA loop cable l LPDT In Line Installation Sensor Measuring at Line Pressure Main Gas Line a Bypass Installation Sensor Measuring at Line Pressure Main Control Gas Line Valve maintain differential pressure to provide adequate flow through sample cell page 6 Section 2 Sensor and Sam
25. de and press the UP button the display will show the current value in the range of 1 99 to 1 99 followed by blinking horizontal lines ignore the alternately displayed dewpoint b Use the UP or DOWN buttons to modify the cal adjust value as necessary c Press the MODE button to go to the next mode this will save the new cal adjust value and it will be retained even if power is turned off 2 3 4 and 5 are set at the factory and need only be modified when a sensor is changed 6 Testing the analog output By pushing the UP or DOWN buttons the user forces the analog output to its low and high values respectively This facilitates the hook up and testing of the user s monitoring equipment 7 amp 8Output range setting These modes are used to set dewpoints corresponding to the low and or high end of the current loop output refer to appendix G page 27 LPDT User s Manual 9 Lock Unlock the instrument This mode is used to block access to parameter settings protecting the instru ment from unauthorized or inadvertent changes of parameters Attempting to change settings while instru ment is locked will display Lot To unlock the instrument press the UP button to lock the instrument press the DOWN button Pressing the MODE button will navigate back to the Select Alternate Display Units mode Pressing and holding either the UP or DOWN button will save the lock or unlock setting depending on the button and reset th
26. e dewpoint at line pressure See appendix F Please make sure that The sample is taken from the upper surface of the main gas line This avoids problems with contamination The sample should be taken away from pipe line walls where flow rates may be low and dewpoint changes may lag For dewpoints dryer than 40 F use stainless steel tub ing only Copper tubing is acceptable for dewpoints wet ter than 40 F Do not use plastic rubber or tygon tubing under any circumstances as measurements would be incorrect and or response time slow due to water reten tion inside these materials Try to run pipes to the sensor upwards so that contami nants tend to fall back into the main line Keep the length of the sample line to the sensor as short as possible Use small diameter pipes 1 4 or 1 8 OD Use sufficient flow rates e g 1 l min with 6 feet of 1 8 piping is adequate The flow rate will influence the sys tems response time page 8 Section 2 Sensor and Sampling Technigues Do not install any devices upstream of the sensor such as other measuring systems flow meters etc which are not absolutely necessary as these are potential leak sources Installation of a coalescing and or particulate filter ahead of the sensor is desirable to prevent any liquid or particulate contamination of the sensor If filters are used upstream of the sensor make sure these contain non hygroscopic filter materials only
27. e instrument This feature is useful if it is difficult to power off the instrument Note It is imperative that one returns the instrument to the locked mode to avoid unauthorized changes 3 5 Troubleshooting the Instrument This instrument performs diagnostic tests on power up as well as once every two minutes The table that follows depicts all possible error unexpected messages that may be displayed on the instrument For each message the table has explanations for the reason and if necessary a suggested action to remedy it page 28 Section 3 Instrument DISPLAY EXPLANATION REOUIRED ACTION LO Err PROM check sum failed HI Err RAM write read test failed E cycle power o Err Unidentified power up failure if problem persists a CSF EEPROM Check Sum Failed return to your representative Ecc Rd A D converter failure for service s Ecc cEF Reference voltage for A D out of spec N Lo b t Low supply voltage check input voltage 10 33VDC o LOrn Instrument Jow temperature range 6 TEMP has been exceeded make sure that the unit is at a 5 HI rnb Instrument high temperature range gt temperature of 10 C to 70 C TEMP has been exceeded oPn Sensor circuit is open see table in 2 SRE Sensor is saturated E sensor troubleshooting E S5Hc Sensor circuit is shorted section E Trying to calculate dewpoint for select sensor and undefined sensor Sp
28. ely dry end the curve is asymptotic to the capacitance due to the Aluminum Oxide and the gas while at the very wet end the curve is asymptotic to the capaci tance due to water molecules packed extremely tightly sat urated in the pores of the Aluminum Oxide This upper end is an excellent indication of the total pore volume while the lower end of the curve is an indication of the distance between and area of the capacitor plates electrodes this is the intrinsic capacitance of the sensor Therefore knowing these two points a sensor can be calibrated with compensa page 36 Appendices tion for small manufacturing deviations As the sensor is used in real world applications it is exposed to various elements and stress like any other sen sor it may over time drift from calibration However one must note that the intrinsic capacitance will not change with use because it is based simply on the dielectric constant of Al203 and the distance between amp area of the plates elec trodes thus the original factory measured values will always be valid What may change is the pore volume due to clogging with contaminants residual oxidation metal migration etc Thus to re calibrate the sensor the instrument needs only to know the capacitance at the wet end of the curve As discussed previously the capacitance at the wet end approaches asymptotically a saturated pore capacitance therefore if the sensor is saturated the exact water con
29. ensor installed in the instrument 26 i XTR 100 100 C to 20 C 266 XTR 65 65 C to 20 C 3 amp 4A djusting low end sensor attenuation and dewpoint These modes are used to enter a data pair representing a low dewpoint and the sensor attenuation measured at this low dewpoint see Sensor Theory of Operation appendix E This data pair should not be modified unless the sensor is replaced The sensor shipping con tainer is labeled with the proper values page 25 LPDT User s Manual 5 Calibration Adjustment In this mode the user can enter a sensor specific Adjustment Value to improve the instruments accuracy in the range of 50 C to 10 C this adjustment has very little or no effect outside this range The Calibration Adjustment Value is printed on the shipping container supplied with the sensor or may be derived if the sensor can be exposed to a known ref erence A Deriving an Adjustment Value If the adjustment value for your sensor is not known contact your repre sentative and follow the instructions in paragraph B on the next page If the value is not available then it may be derived using a manual method provided that a moisture calibration lab is available The calibration must be done in the range of 25 C to 20 C attempting to calibrate outside this range may cause inaccuracies the dewpoint must be kept stable during calibration and it must be measured accurately by areference instrument such as a c
30. esiccant and seal the con tainer from outside air the shipping container is designed for this purpose Display Shows cu mu Display Shows e p n Remove unscrew sensor if the instrument still reads SHr the problem is with the instrument However if the instrument reads OF then check possible cause 2 Remove unscrew sensor and note that the meter reading returns to OPn Use a new sensor or apply approximately 20V DC between the center pin amp the filter body of the sensor MOMENTARILY with the sensor in a known dry condition Polarity is not important but the contact MUST be very brief or the sensor may be damaged Remove unscrew the sensor Short the center contact of the LPDT sensor connection to the case if the instrument reads SHr the problem is in the sensor otherwise return the instrument for service Check sensor connection or replace sensor page 11 LPDT User s Manual page 12 Section 3 Instrument 3 1 Precautions using the LPDT The LPDT uses state of the art microelectronics to provide a miniature full functioning instrument The user should consider the following precautions when using any sensitive electronic device Do not install the unit near heat sources such as radia tors or air ducts Do not install the unit in places subject to extreme mechanical vibration or shock If this is not avoidable use resilient mounting If in doubt call your representa tive
31. hilled mirror One must also note the state of pressure compensation and turn it on or off as applicable to the reference The necessary steps are described below also refer to the Set Up State flow diagram in Appendix B a Make sure that the low attenuation and low dewpoint are correctly entered for this sensor b SpanCheck the sensor c Dry down the sensor for at least 12 hrs d Expose the sensor to the known dewpoint 25 C to 20 C for a sufficient time at least 30 min e Go to the EHL Fdu mode and press the UP button the display will show the current value in the range of 1 99 to 1 99 followed by blinking horizontal lines f Observe the display if the buttons are not being page 26 Section 3 Instrument pressed the display will every few seconds show for a short duration the dewpoint as being computed at the moment utilizing the current cal adjust value in the computation g Use the UP or DOWN buttons to modify the cal adjust value and observe the alternately displayed dew point Perform this adjustment until the dewpoint matches the value shown by the reference instrument h Press the MODE button to go to the next mode this will save the new cal adjust value and it will be retained even if power is turned off B Entering a known Adjustment Value If the sensor is being replaced an adjustment value should be supplied with the sensor to enter it into the instrument a Go to the CAL Adu mo
32. lity Considerations 13 3 2 Instrument Technical Specifications 14 3 3 Installation isfidi sis erede a 15 3 3 1 Mechanical Installation 15 3 3 2 Electrical Installation 16 3 4 Operating the Instrument 17 Brun abs Ruita aussi 17 3 4 2 Display Conventions 17 3 4 3 Push BUttOlis d a tate 19 3 4 4 Operating State 19 3 4 4 1 Viewing Dewpoint Mode 20 3 4 4 2 Viewing Temperature at the Sensor 20 3 4 4 3 Start Calibration SpanCheckTM Mode 21 3 4 4 4 Viewing Serial Number Mode 24 3 4 5 SetUp State 24 3 5 Troubleshooting the Instrument 28 Appendix A Operating State User Interface flowchart 31 Appendix B Set Up State User Interface flowchart 32 Appendix C LPDT Mechanical Drawing 34 Appendix D LPDT Electrical Connections 35 Appendix E Sensor SpanCheck Theory of Operation 36 Appendix F Pressure Correction 39 Appendix G Current vs Dewpoint 40 LPDT User s Manual Appendix H Uncertainty in LBS amp ppmV calculations 43 Appendix I Sensor Response Time
33. nation LPDT User s Manual page 46 Xentaur Corporation 3661 Horseblock Road Medford NY 11763 USA Tel 516 345 3434
34. of USER S MAX LPDT User s Manual When calling your representative for technical support please have your serial numbers available The Sensor and Instrument Serial Numbers are on the instrument also see section 3 4 4 4 Sensor Serial No Instrument Serial No Your Representative is COSA INSTRUMENT CORPORATION 55 Oak Street Norwood NJ 07648 Tel 1 201 767 6600 Fax 1 201 767 6804 e mail cosa cosaic com Except as may be provided by contract this document and all specifications and drawings contained are the property of Xen taur Corporation are issued in strict confidence and shall not be reproduced or copied or transmitted in any form or by any means or used as the basis for the manufacture or sale of appa ratus programs or services without permission Check the Internet for updates the latest revision of this manual is available in Adobe Acrobat format at http www xentaur com Document No LDO 01 D 2000 Rev 0 6 1 99 Copyright 1999 by Xentaur Corporation LPDT User s Manual Xentaur reserves the right to change or modify the product specification and or appearance at any time without notice Therefore the information in this document is subject to change without notice and does not represent a commitment on the part of Xentaur Corporation The customer agrees that in accepting and using this instru ment Xentuar Corporation s liability arising from o
35. pling Technigues 2 3 2 Extractive Installation For extractive installations we recommend our sample sys tem ESS which may be eguipped with a variety of features such as isolation valve coalescing or particulate filter pressure regulator calibration sample injection or extraction port pressure gauge flow meter weatherproof enclosure Refer to the ESS literature for more information If the resources to make your own sample system are avail able the following two diagrams may be used as a guideline to configure a simple system 4 20mA loop cable II p 1 bint Transmitter Regulator or Needle Valve Extractive Installation Sensor Measuring at Line Pressure Regulator or Needle Valve Extractive Installation Sensor Gas Line Measuring at Ambient Pressure page 7 LPDT User s Manual It is generally recommended to measure at ambient pressure for the following reasons The readings will not be affected by variations in line pressure The risk of exposing the sensor to liquid water is signif icantly reduced ppm readings are computed for a pressure of one atmo sphere 1 bar and have to be corrected using software in the instrument or a pressure nomograph or calcula tor if the sensor is measuring at different pressures If readings at line pressure are necessary it is recommended to measure at ambient pressure and to use the instrument s pressure compensation feature to calculate th
36. pressure at the sensor affects their value While C and F are affected by pressure correction by reporting what the dewpoint would be at the Gas Pressure when the dew point is what is measured at the pressure at the sensor How ever this also implies that whether pressure correction is applied or not the PPM LBS and G M readings are affected by the setting of the sensor pressure The factory default settings are 14 7psi for both sensor and gas pressure and pressure correction disabled When Pressure correction is disabled all dewpoints are computed by assuming that both Sensor and Gas Pressures are 14 7psi As all Xentaur dewpoint meters the LPDT is equipped with the necessary software to perform pressure correction However for the lack of space the LPDT does not have a Pressure Correct button Therefore the user can not set or enable Pressure Correction this must be done at the factory Consult with your representative page 39 LPDT User s Manual Appendix G Current vs Dewpoint The current being pulled by the LPDT varies with the dew point being measured by the LPDT To use the current to calculate the value of the dewpoint measurement one must know the settings of the low and high ends of the analog output range then _ 1 4 x H L v vvhere 7 current dravvn by LPDT loop in mA H value of High end of Analog Output range converted to selected engineering units L value of Low end of Analog Outpu
37. r in any way connected with this instrument shall be limited exclu sively to performing a new calibration or replacement or repair of the instrument or sensor at Xentaur s sole option as covered by Xentaur s warranty In no event shall Xentaur be liable for any incidental consequential or special dam ages of any kind or nature whatsoever including but not limited to lost profits arising from or in any way connected with this instrument or items hereunder whether alleged to arise from breach of contract express or implied warranty or in tort including without limitation negligence failure to warn or strict liability Swagelok Cajon are trademarks of SWAGELOK Co Acrobat is a trademark of Adobe Systems Incorporated Microsoft Windows is a registered trademark of Microsoft Corporation HTF is a trademark of Xentaur Corporation SpanCheck is a trademark of Xentaur Corporation The Xentaur Logo is a trademark of Xentaur Corporation LPDT User s Manual Examine the LPDT package for damage or mishan dling If any damage is evident notify the carrier and request an inspection Unpack the box it should contain The LPDT with sensor in desiccant container connectorized cable and this manual PLEASE READ THIS MANUAL IN WHOLE PRIOR TO INSTALLING OR REMOVING THE SENSOR FROM ITS SHIPPING CONTAINER This manual is organized in three sections Section 1 is an overview of the LPDT Section 2 describes the sensor and sampling tech
38. rom its packaging container so that the porous metal filter is visible and the sensor is exposed to in hand micro climate Close the packaging container as soon as you have removed the sensor to avoid degradation of the desiccant inside of the con tainer You may want to re use the container at a later date 5 Push the UP button again to confirm that you want to start the calibration procedure The display will flash AC for 60 seconds while the sensor is saturating Make sure you keep the sensor exposed to in hand micro climate until the display shows End 6 After 60 seconds the display will flash the selected sen sor type see Selecting a sensor type 3 4 5 2 and then the instrument will calculate the slope and offset of the sensor curve while displaying the calculations and then will display End for a few seconds after which the instrument will automatically go into measuring mode The sensor calibration is completed The display may flash 586 indicating that the sensor has super saturated As soon as the sensor is exposed to an atmosphere with a dewpoint lower than the saturation dewpoint the dis play will indicate the dewpoint measured by the sensor The display may show alternating SE and Lo as an indication that the measured capacitance is too low to be from a saturated sensor in this case make sure that the sensor is fully engaged into the LPDT and repeat the calibration procedure page 22 Section 3 Instrument 7
39. s designed and field proven to be highly reliable rugged and maintenance free However the user should consider the following precau tions To avoid the need for prolonged dry down when expecting to measure dewpoints dryer than 65 C do not expose the sensor to room air longer than necessary 1 2 minutes Thus do not open the sensor container before you are ready to install the sensor The sensor container has desiccant to keep the sensor dry during shipping and to avoid damage due to conden sation Close the container immediately after removing the sensor to avoid degradation of the desiccant Do not throw away the sensor container you may use it again to transport the sensor between locations to store it between uses or to ship it back to the factory for certi fication The container can be attached to the loop cable by trapping the cable with the lid strap Do not expose the sensor to corrosive gases such as gases containing chlorine ammonia or HCI SO2 can be monitored when the moisture content is low Except for the XTR65W sensor 1 Do not expose the sensor to liquid water as it may get damaged 2 Do not breathe directly onto the sensor as condensa tion may form which could damage the sensor element Do not install the sensor near heat sources such as radia tors or air ducts Do not install the sensor in places subject to extreme mechanical vibration or shock If this is not avoidable use resilient mounting
40. t range converted to selected engineering units D dewpoint measured by instrument in selected engineering units Consult section 3 4 5 76 8 and or appendix B to check and set the Analog Output low and high ranges the factory default settings are 100 C and 20 C respectively For example a unit with factory default settings drawing 12mA is computed to be measuring a dewpoint of 40 C D L 12 4 x 20 100 T 100 40 Note that the computation is such that the current is linear to the selected engineering units Hence selecting ppmV or LBS or G M3 units will cause the analog output to be lin early proportional to those units approximately logarithmi cally proportional to dewpoint refer to the graph that follows Naturally selecting C or F will cause the analog output to be linearly proportional to dewpoint When monitoring in ppmV or LBS or G M3 the analog output low amp high ranges may have to be adjusted to pro page 40 Appendices vide a useful output Consider an example where the area of interest to be monitored is 10 to 100 ppm V and the analog output is set up with the factory defaults of 100 C to 20 C which is 0 014 to 23612 ppm V then the current loop out put will vary only from 4 1 to 4 2 mA in the area of inter est consult with the graph on the following page In most instances this would be an unacceptable output for proper monitoring of the measurement In this example
41. tent will not be important since the curve is asymptotic then the instrument can measure the capacitance and re calibrate the sensor This is refered to as SpanCheck The advantages of this unique capability of Xentaur sensors and instruments are obvious in time and cost savings for re calibration as well as ease of sensor replacement Xentaur HTF Sensor Dewpoint vs Capacitance Response Curve 200 l Saturated Capacitance Asymtote of New Sensor l Saturated Capacitance Asymtote of Aged Sensor 160 ne lt s z sensor x MS 120 Capacitance nF 80 He Dry Capacitance Asymtote of New amp Aged Sensor 4 80 60 40 20 0 20 Dewpoint Reference C page 37 LPDT User s Manual page 38 Appendices Appendix F Pressure Correction Sensor pressure is used in the context that this is the pres sure inside the sampling chamber when performing the measurement Gas pressure is used in the context that this is the pressure to be used in computing what the dewpoint would be at a pres sure different than the one in the sampling chamber Pressure correction is used in the context that the values dis played signify the moisture content at some pressure we refer to this as the Gas Pressure different than the pres sure at the sensor Note that PPM LBS and G M readings are by definition unaffected by pressure correction because only the
42. tion Number RAN and shipping instruc tions Issuance of an RAN does not automatically imply that the equipment is covered by our warranty that will be determined after we receive the equipment Pack the equipment in a suitable box with sufficient padding include the RAN number on your paperwork and send the equipment prepaid to the designated address Xentaur will not accept equipment returned without an RAN or with reversed shipping or import export charges If the warranty has expired or the damage is due to improper use or exposure of the equipment then Xentaur will provide an esti mate and wait for approval before commencing repairs For your convenience a Return Authorization Request Form is provided in appendix J it must be filled out and sent back to Xen taur in order to obtain a RAN LPDT User s Manual LPDT User s Manual Table of Contents 1 0 Overview of the LPDT 1 2 1 Precautions using the sensor 3 2 2 Sensor Technical Specifications 4 2 3 Sensor Installation amp Sampling Techniques 4 2 3 1 In situ Installation 5 2 3 2 Extractive Installation 7 2 4 Troubleshooting unexpected readings 9 3 1 Precautions using the LPDT 13 3 1 1 Electromagnetic Compatibi
43. tion points valves filters and other hygro scopic materials in the system leaks in the system and oth ers Thus the measurement may vary from the expectation and therefore care should be taken in choosing the sampling technique utilized in the measurement Factors such as gas pressure flow rate materials of construction length and page 4 Section 2 Sensor and Sampling Technigues diameter of tubing number of interconnecting fittings dead space in tubing and manifolds will influence the measure ment value and response time The high capacitance HTF sensors can be installed either directly in the line to be sampled in situ or in a slip stream of a sample system extractive To assure a long and accurate performance of the sensor it should be protected from contaminants such as liquids water oil etc and particulates The sintered stainless steel sensor encapsulation protects from particulates larger than 100 microns finer particulates e g from degraded desic cant or rust should be filtered with a particulate filter with suitable capability do not use hygroscopic filter materials 2 3 1 In situ Installation In situ installation is recommended only for measurements where the gas pressure is expected to vary little the gas is expected to be free of contaminants the gas temperature is within the operating specifications of the sensor and there is no chance of liquids coalescing Examples of applications suite
44. user options Modes the UP and DOWN buttons modify the units values or choices in the selected mode Refer to the flow diagrams in Appendix A for detailed overview of button functionality A button may be held down for a pro longed time for accelerated incrementing or decrementing of numeric values 3 4 4 Operating State Upon power up the unit performs certain initialization tests see table in section 3 5 and enters the Operating State in the Viewing Dewpoint mode Depressing the MODE but ton will change modes see appendix A in the following order Viewing Dewpoint lt Viewing Temperature lt OStart Calibration lt Viewing Serial Number lt back to OViewing Dewpoint The unit will return to Viewing Dew point mode if no buttons are pressed for 30 seconds unless it is performing a calibration page 19 LPDT User s Manual 3 4 4 1 Viewing Dewpoint Mode In this mode the user can view the dewpoint this is indi cated by the presence of the DEWPOINT legend on the lower left of the display The available engineering units in which to view the moisture content are C F PPM LBS and G M5 the UP and DOWN buttons scroll back and forth through these units in respective order The C and F are dewpoint readings The PPM is parts per million by volume computed at the sensor pressure more about pressure in appendix F The LBS and G M are pounds of water per million standard cubic feet and
45. yg 194e dP o z Z9 0 0 tin ye AP o p 66 Woy NMOQ eBueuo deis e o siosuas EOEJV JNEJUSX Jo suods y SOL 001 96 06 98 08 SL 02 99 09 SS 0S Sv 07 96 0 Sc 0c SL 01 96 of step change page 44 Appendices Return Authorization Reguest Xentaur must approve and assign a return authorization number RAN to any instrument being returned The RAN must appear on all paperwork and packag ing The issuance of a RAN does not automatically imply that the instrument is covered by our warranty In order to serve you better and protect our employees from any potentially haz ardous contaminants Xentaur must return unopened at the senders expense all items that do not have a RAN To obtain a RAN fill out a copy of this form and fax to 516 345 5349 Customer Information Company Name Address Contact Name Phone Fax Eguipment Information Part or model number LPDT Serial number Original Purchase date P O number Reason for return failure and hookup description if applicable Process material s and or environments including radiation to which the eguipment has been exposed OSHA Hazard Communication Standard 29CFR 1910 1200 mandated that we take specific steps to protect our employees from exposure to potential hazards Therefore a letter certifying that the eguipment has been decontaminated must accompany all eguipment exposed to hazardous contami
Download Pdf Manuals
Related Search