Xentaur XDT User Manual Download Page 65

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Summary of Contents for XDT

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Page 2: ...ract this document and all specifica tions and drawings contained are the property of Xentaur Corporation are issued in strict confidence and shall not be reproduced or copied or trans mitted in any f...

Page 3: ...Xentaur s warranty In no event shall Xentaur be liable for any incidental consequential or special damages of any kind or nature whatsoever including but not limited to lost profits arising from or i...

Page 4: ...echanical and user interfaces This manual is intended for those already familiar with the installation use and maintenance of analytical or process instrumentation Those acquainted with other Xentaur...

Page 5: ...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...

Page 6: ...2 1 Connecting Power 12 3 3 2 1 1 AC Mains Electrical Power Connection 13 3 3 2 1 2 Low Voltage DC Powered Option Electrical Power Connection 13 3 3 2 2 Sensor Connection 13 3 3 2 3 Wiring the Alarm C...

Page 7: ...Operation 45 Appendix G Dewpoint Response time Analysis 46 Appendix H Sample Gas Filter Considerations 48 Appendix I DT Grounding Considerations 49 Appendix J Analog Output vs Dewpoint 50 Appendix K...

Page 8: ...ed at fac tory Capability to enter up to 15 NIST NPL traceable calibration points at factory depending on order Manual Self Calibration a single point calibration using a known standard gas High accur...

Page 9: ...XDT User s Manual 2...

Page 10: ...lose 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...

Page 11: ...L and cUL for ordinary use Intrinsically Safe configurations for NEC standard IS Simple Apparatus UL for CENELEC standard IS Simple Apparatus DEMKO refer to labeling 2 3 Sensor Installation Sampling T...

Page 12: ...sure If the gas line is under pressure it is more likely that water condensation occurs which may damage the sensor Under a pressurized system removal of the sensor without the installation of isolat...

Page 13: ...ure monograph or calculator if the sensor is mea suring at different pressures If readings at line pressure are necessary it is recommended to measure at ambient pressure and to use the instrument s p...

Page 14: ...pstream of the sensor make sure these do not contain rubber or other hygroscopic materials 2 4 Mechanical Installation The sensor probe has two thread sizes for mounting to the sample cavity where the...

Page 15: ...made with PTFE pipe NEVER use rubber or plastic pipe Comparison of readings with manual cooled mirror instrument This type of indicator reads about 10 C dry at about 50 C dewpoint due to tempera ture...

Page 16: ...ildup on your person by touching a grounded metal object Integrated circuits can be damaged by electrostatic discharge handling the circuit board by its edges and avoiding touching any metal component...

Page 17: ...nts For Sensor signal RG58 coaxial cable or RG6 for cable longer than 100 A 6 foot cable is provided as a standard other lengths ordered as options When changing cable refer to cable compensation sect...

Page 18: ...specified dimensions using the provided panel gasket and all four provided mounting brackets The instructions listed below should be followed If the clip on mounting brackets are installed on the inst...

Page 19: ...250VAC 50 60Hz 10VA the instrument has an internal 0 5A 250V fast acting fuse However the XDT can also be optionally ordered to operate from 15 to 30 VDC 0 5A with an internal 0 5A 21 C 20 NO 18 Not...

Page 20: ...tch or circuit breaker shall be included in the installa tion It shall be in close proximity to the equipment and within easy reach of the operator It shall be marked as the disconnecting device for t...

Page 21: ...ity indications The positive terminal is on pin 7 it is labeled A OUT and the negative is on pin 8 it is labeled A RET The ground of the Analog Output is connected to the frame AC power ground but it...

Page 22: ...is jumpering may be accomplished at the DB9 or DB25 connector CAUTION Connecting the RS 232C interface on instruments which do not have the option installed will damage the instrument Refer to appendi...

Page 23: ...es follow for each the number and units desired to be displayed are shown in italics depicted immediately below them is the resultant 3 digit LCD display 3 4 3 Push Buttons Four push buttons provide u...

Page 24: ...eturn to Viewing Dewpoint mode if no buttons are pressed for 30 seconds unless it is performing a cali bration 3 4 4 1 Viewing Dewpoint Mode In this mode the user can view the dewpoint this is indicat...

Page 25: ...t is what is measured at the pressure at the sensor However this also implies that whether pressure correction is applied or not the PPM LBS and G M3 readings are affected by the setting of the sensor...

Page 26: ...point is high e g A X H 2 Fail Low put the alarm in a state as if the dewpoint is low e g A X L 3 Fail Flashing Energize Deenergize the relay alternating once every 2 seconds e g A X F 4 No Special Ha...

Page 27: ...using the sensor s ability to saturate thus no addi tional materials or equipment are required this calibration is most useful after long periods of usage and a suspicion of performance degradation Si...

Page 28: ...trument consult section 3 4 5 10 2 Push the MODE key a few times until the display shows CAL 3 Press the UP button The display will show CNF prompting you to confirm that you want to start the calibra...

Page 29: ...re Care must be taken that the sensor temperature is not below the temperature of the hand as in such case condensation could occur and super saturate the sensor For the same reason avoid exhaling dir...

Page 30: ...41 5 indicating that Self Cal Stabilization is being checked and currently the instru ment is measuring 41 5 C When the measured dewpoint is stable within 0 5 C for 3 minutes the instrument will reco...

Page 31: ...button to initiate the Self Calibration the display will show CNF SC prompting for a confirmation that the Self Calibration should be performed If the DOWN or Pressure Correct buttons are pressed the...

Page 32: ...to enter the setup state Pressing the MODE button returns 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 Mode and...

Page 33: ...ure cali bration facility 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 duri...

Page 34: ...ked the display will show SET UN LOC The slash denotes that the display is alternately showing UN and LOC this is necessitated by the 3 5 digit limita tion of the display Pressing the DOWN button will...

Page 35: ...hort at the instrument screw terminals as this approach will not account for the cable resistance c Go to the CNF CBL OPN Confirm Cable Open mode d Leave the BNC connector open and press the UP key Th...

Page 36: ...shooting 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 displa...

Page 37: ...be from a saturated sensor thus can not be calibrated 2LO While Compensating for cable length the measurement did not correspond to the expected open or short values cable tests Check the means of op...

Page 38: ...rument enclosures may be cleaned when necessary using a damp moist cloth The XDT OEM bare circuit board may be cleaned by blowing air across the circuit board The sensor should not be cleaned as it ma...

Page 39: ...XDT User s Manual 32...

Page 40: ...e bit s Binary digit s ones and zeros BNC a connector type used with coaxial cables bypass mounting sensor mounting in a slip stream of sample which feeds back into the process stream CE Conformit e E...

Page 41: ...t Ready a label for a RS232 interface control line DTR Data Terminal Ready a label for a RS232 control line EEPROM Electrically Erasable Programmable Read Only Memory a device that can remember inform...

Page 42: ...STM American Society for Testing and Materials standard of tube fittings with tapered threads parity a way of incorporating error checking into a RS232 data transmis sion on a character by character b...

Page 43: ...e sensing element it may include regulators filters heaters coolers flow meters valves and other accessories saturate reaching maximum holding capacity sintered produced by a process of compacting and...

Page 44: ...Self Cal user interface next page When a third Alarm Relay is installed setup menu options will appear here similar to Relays 1 2 but with both the HI LO legends active This is also the dewpoint alar...

Page 45: ...onfirm Entry into Self Cal Menus Set Scheduled Calibration Interval in hours 0 blank Scheduled SelfCal disabled but SelfCal corrections not affected View Hours left until next Scheduled Calibration Th...

Page 46: ...or a moment SET Select Span of Analog output 0 to 24mA or 4 to 20mA Factory default is blank there is no alternate display CAUTION These are set properly at the factory with the shipped sensor Do not...

Page 47: ...rench 1 4 1 45 14mm x 1 25mm 3 4 16 Viton A O ring female BNC connector 2 230 3 min Removable Sensor encapsulated in 100 sintered stainless steel unscrew to remove 5 16 24 tension washer X E N T A U R...

Page 48: ...XDT User s Manual Appendices 41 Appendix D Optional Sensor Fittings...

Page 49: ...GNAL IN ACH ACN DEWPOINT TRANSMITTER C US R 0 627 0 146 0 195 0 335 0 965 4 370 5 145 4 935 4 630 0 155 3 502 3 900 0 158 2 315 0 805 1 853 1 453 1 052 1 030 0 662 0 700 0 740 2 140 0 197 5mm typ 0 35...

Page 50: ...ual Appendices 43 Appendix E continued XDT PM Enclosure Mounting Dimensions Standard mounting with clip on compression brackets Environmentally sealed mounting with gasket and clip on screw clamp moun...

Page 51: ...XDT User s Manual Appendices 44 Appendix E continued XDT NEMA Enclosure Mounting Dimensions...

Page 52: ...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 area of the capacitor plates electrodes this is the...

Page 53: ...The dewpoint was generated with a computer controlled mass flow valve gas dilution dewpoint generator and was verified with a NIST and NPL calibrated MBW chilled mirror The system was allowed to achi...

Page 54: ...fortably make the claim that the Xentaur XTR 100 sensor is faster than any on the market today To compensate for their sensors slow response some manufacturers resort to software accelera tion of resp...

Page 55: ...quickly deteriorates for dewpoints below 55 C With this in mind the user should select the appropriate filter construction materials It is impor tant to note that a stainless steel housing filter will...

Page 56: ...digital line such as RS 232 will not cause problems 3 The Earth Safety Ground AC GROUND at pin 4 should not be omitted since the RFI filter capacitors will cause half the line voltage to develop at t...

Page 57: ...r an example where the area of interest to be moni tored is 10 to 100 ppmV and the analog output is set up with the factory defaults of 100 C to 20 C which is 0 014 to 23612 ppmV then the current loop...

Page 58: ...utput and instrument reading in ppmV or LBS Instrument reading in ppmV Instrument reading in LBS of H2O million cubic feet 10 100 1000 10000 4 1mA 5mA 0 1 1 10 100 1000 12mA 8mA 20mA 4 5mA 4 20 mA out...

Page 59: ...mmand argu ments are encompassed with brackets The commands may be sent in either upper or lower case Arguments may be delimited with space or comma HELP command Lists all of the available commands se...

Page 60: ...stalled it is indicated with a character string HiAlrm or LoAlrm or NoAlrm If an error condition exists then the report will have the following format B L B LErrorStringC R L F The ErrorString may be...

Page 61: ...01 23 45S PNoAlrmC R L F The default factory setting for the instrument is to respond in numeric format in the user chosen units See the section about the DATA command for more details Serial Number C...

Page 62: ...will show the cur rently entered low dewpoint Use the UP or DOWN keys to select the value which appears on the shipping container label 5 Press the MODE key to go to the Calibration Midrange Adjust m...

Page 63: ...due to 3 C measurement accuracy Calculated ppmV Calculated LBS H2O mmscf 80 75 70 65 60 55 50 45 40 35 30 25 20 0 5 0 5 0 25 2 5 0 05 0 6 0 7 0 8 0 9 1 1 0 1 2 3 4 5 5 6 7 8 9 10 10 20 30 40 48 38 34...

Page 64: ...k Company Name Address Contact Name Phone Fax Part or Model Number Serial Number Original Purchase Date PO Number Reason for Return Failure and hookup description if applicable Process material s and...

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Page 66: ...libration 20 B board dimensions 42 box 10 box dimensions 43 44 buttons 16 C cable access 12 compensation 28 grips 12 length 13 sensor 4 cabling alarm relay contacts 13 analog output 14 power 12 requir...

Page 67: ...gases 3 flow diagram operating state 37 self calibration 38 set up state 39 flow meters 7 flow range 4 flow rate 7 front panel 17 fuse 29 G G M3 17 gas pressure 18 gases corrosive 3 incompatible 3 ga...

Page 68: ...mple treatment 4 selecting sensor type 26 self calibration flow diagram 38 sensor cable compensation 28 connection 13 container 3 dimensions 40 exchange procedure 55 pressure 18 signal cable 4 theory...

Page 69: ...Index 60 voltage mains supply 10 W warning labels iii warranty iv water 3 weather proofing 9 weight 10 wiring 9 alarm relay contacts 13 analog output 14 power 12 requirements 10 RS 232C 15 sensor 13...

Page 70: ...XENTAUR CORPORATION 84F HORSEBLOCK ROAD YAPHANK NY 11980 U S A TEL 631 345 3434 FAX 631 345 5349...

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