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XDT 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.
XDT 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.
XDT User’s Manual Examine the XDT package for damage or mishandling. If any damage is evident notify the carrier and request an inspection. Unpack the box, it should contain: The XDT, 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 XDT. Section 2 describes the sensor and sampling techniques.
XDT User’s Manual Warranty This instrument is warranted to be free from defects in workmanship and materials. Liability under this warranty is limited 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 equipment must be determined by Xentaur to have been defective for the warranty to be valid.
XDT User’s Manual Table of Contents 1.0 Overview of the Dewpoint Transmitter model (DT) ...........................................................1 2. Sensor and Sampling Techniques ..........................................................................................3 2.1 Precautions using the sensor ................................................................................................3 2.2 Sensor Technical Specifications .....................................................................
XDT User’s Manual Appendix D: Optional Sensor Fittings.....................................................................................41 Appendix E: DT Circuit Board Dimensions............................................................................42 Appendix F: Sensor/SpanCheck™ Theory of Operation ........................................................45 Appendix G: Dewpoint Response time Analysis ....................................................................
Section 1: Introduction 1.0 Overview of the XDT The XDT is a microprocessor based hygrometer, for measuring moisture content in gases in the range from -100°C to +20°C dewpoint depending on the sensor ordered. The XDT uses the Xentaur Hyper Thin Film HTF™ sensor which is encapsulated in sintered stainless steel, thus it is capable of coming into contact with a wide variety of environments. However one should keep in mind that the sensor is a delicate device and it should be handled accordingly.
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Section 2: Sensor and Sampling Techniques 2. Sensor and Sampling Techniques 2.1 Precautions using the sensor The Xentaur HTF™ Al2O3 sensor is designed and field proven to be highly reliable, rugged and maintenance free. However the user should consider the following precautions: • If the instrument is used to measure moisture in toxic, flammable, or explosive gases, the sample outlet must exhaust to a safe place. • Check the sample line for leaks before and after connecting.
XDT User’s Manual 2.2 Sensor Technical Specifications Type: ..................................Hyper Thin Film HTF™ high capacitance Al2O3. Dewpoint range:.................XTR-100: -148°F 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 (±3°C) refer to appendix M for accuracy expressed in other units of measure. Repeatability: .....................±0.9°F (±0.5°C). Response time:..................
Section 2: Sensor and Sampling Techniques 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 suited for in-situ installations are: pure gases, output of desiccant dryers (for instrument air), glove boxes, etc.
XDT User’s Manual 2.3.2 Extractive Installation For extractive installations we recommend our sample system ESS, which may be equipped 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.
Section 2: Sensor and Sampling Techniques • • • • • • • • inside these materials. Try to run pipes to the sensor upwards, so that contaminants 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 systems’ response time.
XDT User’s Manual 2.5 Troubleshooting unexpected readings If erroneous readings are suspected on a newly acquired instrument, compare the serial number engraved on the sensor sintered filter, to the label on the instrument. 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 remedy.
Section 3: Instrument 3. Instrument 3.1 Precautions using the XDT The XDT uses state-of-the-art microelectronics to provide a compact full functioning instrument. The user should consider the following precautions when using any sensitive electronic device. • Observe the appropriate electrical safety codes and regulations. Consult with National Electrical Code article 400, and/or other nationally or locally recognized procedures relevant to your installation.
XDT User’s Manual 3.2 Instrument Technical Specifications Enclosure: .........................XDT-OEM bare board XDT-NEMA tabletop or surface mount, watertight IP65 tested, and NEMA 12 tested XDT-PM panel-mount, DIN 43700 dimensional standard, optional NEMA 12 type protection gasketing available Dimensions & Weight:......XDT-OEM: 4.25” x 5.15” x 2.25”, 0.6 lbs (fully optioned) without cables. XDT-NEMA: 4.73” x 6.3” x 3.55”, 2.1 lbs (fully optioned) w/cables. XDT-PM: 5.67” x 2.84” x 2.
Section 3: Instrument 3.3 Installation 3.3.1 Instrument Mechanical Installation The XDT is available in several different physical configurations. Please follow the instructions below, which describe the instrument being installed. The sensor installation is discussed in Section 2: Sensor and Sampling Techniques. 3.3.1.1 XDT-PM (DIN43700) Enclosure Installation The standard XDT-PM is provided with two clip-on compression panel mounting brackets.
XDT User’s Manual 3.3.2 Electrical Connections All connections are made via a 21 contact, pluggable screw terminal block referred to as P1. Pluggable Block Terminals 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 0.5A 250V Power Supply Module 4.3mH 0.0047uf 0.1uf 275VAC 0.0047uf RFI filter board Sensor Measuring Circuitry 0.
Section 3: Instrument fast acting fuse. Please follow the appropriate installation procedures in the paragraphs below according to the electrical power option on your instrument. Do not connect to AC power without a proper ground connection. For Intrinsically Safe installations, first make sure that the equipment is qualified for the particular installation, it should have a label specifying the certifications and the approving agency.
XDT User’s Manual dent relays corresponding to the HI and LO alarms. The relay contacts are rated at 10A 250VAC or 30VDC, instruments for use in division 2 Hazardous Areas have hermetically sealed relays rated at 3A 125VAC. Use wiring appropriate for the voltage and current that will be switched by the relays. Also see section 1.3 for EMI considerations. Keep in mind that the relay polarity is programmable thus wiring should be designed to provide a fail safe operation in case of power failure.
Section 3: Instrument 3.3.2.5 Interfacing to the RS-232 option The optional RS-232C interface is provided on the P1 connector. The configuration is 9600 baud, Even Parity, 8 Bits, 1 Stop, all received characters are echoed. The ground of the RS-232C interface is connected to the frame (AC power) ground however it is isolated from the sensor ground, see section 3.1.1.
XDT User’s Manual 3.4.2 Display Conventions 1. To display characters with the 7 segment numeric display, the following pseudo-alphanumerics are used: Numbers: 0 12 3 4 5 6 7 8 9 01234567 89 Letters: ABCDEF GH IJ LNOP QRS TUXYZ ABCDEF GH I JL NOPQRSTUXYZ Symbols: ? - . ? -. 2. The instrument will indicate whether a particular mode allows changing a parameter by showing the word “SET” in the upper left corner of the display. Be careful not to change any parameter inadvertently. 3.
Section 3: Instrument • • switches described above. With a front face plate which has labeled holes placed immediately above the circuit board switches, thus the operator may push the switches without removing the face plate, by making use of a probe such as a paper clip. With a front plate containing four membrane switches connected to the circuit board, providing the operator with a easy to use interface. XDT (C) 1999 XENTAUR CORP.
XDT User’s Manual parts per million by volume computed at the sensor pressure (more about pressure later). The LBS and G/M3 are density measurements, pounds of water per million standard cubic feet and grams of water per standard cubic meters, respectively, both in Natural Gas, they are computed according to data derived by IGT Research Bulletin 8, taking into account sensor pressure.
Section 3: Instrument 3.4.4.2 Alarms There are two independent optional alarms, they are named HI and LO alarms. Each alarm can activate a single pole double throw relay rated at 10A 250VAC or 30VDC per contact. Instruments for use in Division 2 Hazardous Areas have hermetically sealed relays rated at 3A 125VAC. Specially ordered instruments may have a third alarm, refer to the supplied addendum for relay contact rating, pinouts and user interface issues.
XDT User’s Manual 5. Push the MODE button. The display will show: SET HI **** ˚C DEWPOINT the ‘DEWPOINT’ indicator means that we are changing the alarm trigger dewpoint 6. Push the UP or DOWN buttons until the display shows: SET HI ˚C DEWPOINT 7. Push the MODE button. The display will show: SET HI * ˚C the Z indicates that we are changing the hysteresis of the alarm. 8. Push the UP or DOWN buttons until the display shows: SET HI ˚C 9.
Section 3: Instrument 3.4.4.3.1 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, and the XTR65W sensor should be re-calibrated after prolonged exposure to liquid water. Simply follow steps 1 - 7 of the procedure below, removing the sensor from the sample gas stream.
XDT User’s Manual 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.
Section 3: Instrument • • • • • • • • point the waiting time may have to be increased - specially if the sensor was wet before the procedure is initiated. Consult with your representative to determine sufficient waiting time for your application. Make sure the instrument is unlocked. Press the MODE button a few times until the display shows CAL. Press the DOWN button to select the Self Calibration mode. The display will show SLF/CAL Press the UP button to confirm entry into the Self Calibration mode.
XDT User’s Manual • • • • • • DEWPOINT legends will also appear. Use the UP and DOWN buttons to modify this dewpoint to match the dewpoint of the reference gas. Press the MODE button, the display will alternately show 720 / HRS / INTR, indicating that the calibrations are scheduled at 720 hours interval. Use the UP and DOWN buttons to change the interval time to whatever is determined to be most effective for your application, consult with your representative if you are in doubt.
Section 3: Instrument • The instrument will display the measurement using the newly acquired calibration values. The instrument computes the dewpoint from the measured capacitance of the sensor. The sequence of computations is as follows: • The capacitance is converted to percent of full scale (-100°C to +20°C dp), using the low dB, low dew, and saturated dB when performing SpanCheck values. • Cal Adj is applied to correct the mid point of the curve.
XDT User’s Manual CAUTION: 2), 3), 4) and 5) are set at the factory and need only be modified when a sensor is changed. 2. Selecting the sensor type: In this mode the user can select the software matching the type of sensor installed in the instrument: XT1 : XTR-100 (-100°C to +20°C); XT6 : XTR-65 (-65°C to +20°C); DB : show impedance of any sensor, disable Open and Short error massages.
Section 3: Instrument a. Go to the CAL/ADJ 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, 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. 6.
XDT User’s Manual ber can be corrected by reversing the use of the UP and DOWN keys), with the “12” flashing. Pressing the “MODE” button will flash the next “0”. Pressing the “UP” button three times will display “1230”. Pressing the “MODE” button will flash the last “0”. Pressing the “UP” button four times will display “1234”. Pressing and holding the “MODE” button, will display “SET UN/ LOC”, indicating that the instrument is now unlocked.
Section 3: Instrument • • This configuration is also equipped with a NEMA sealed audio indicator (>80dB @ 3ft) mounted in the instrument enclosure. It is activated when an alarm condition occurs, it may be disabled by momentarily pressing the RESET button on the front panel. When the alarm condition ceases to exist, the audio indicator is automatically re-enabled, ready to be activated on next alarm condition.
XDT User’s Manual DISPLAY EXPLANATION REQUIRED ACTION PROM check sum failed. HI ERR RAM write/read test failed. % ERR Unidentified power-up failure. C.S.F/ EEPROM Check Sum Failed. return to your representative ERR/AD A/D converter failure. for service. ERR/REF Reference voltage for A/D out of spec. LO/BAT Low supply voltage. LO RNG/ TEMP Instrument low temperature range has been exceeded. HI RNG/ TEMP Instrument high temperature range has been exceeded.
Section 3: Instrument 3.7 Maintenance The XDT-PM and XDT-NEMA instrument 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 may be damaged. Spare parts may be ordered through your representative.
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Glossary Glossary 0/24 mA . . . . . . . . . . . . . . . . range of current for the current loop (0mA=minimum reading, 24mA=maximum reading) 4/20 mA . . . . . . . . . . . . . . . . range of current for the current loop (4mA=minimum reading, 20mA=maximum reading) - preferred because less than 4mA can indicate a fault or open circuit, also there is at least 4mA available to power equipment 7 segment . . . . . . . . . . . . . . .
XDT User’s Manual used for the circuit (see 4/20) dB . . . . . . . . . . . . . . . . . . . . . see - decibel DB25 . . . . . . . . . . . . . . . . . . . a style and size of connector - in this case with 25 pins DB9 . . . . . . . . . . . . . . . . . . . . a style and size of connector - in this case with 9 pins decibel . . . . . . . . . . . . . . . . . . a dimensionless unit representing the logarithm of the ratio of two values DEMKO . . . . . . . . . . . . . . . .
Glossary impedance . . . . . . . . . . . . . . . the ratio of voltage to current at a specified frequency measured in Ohms, a resistor of the same value would act the same as the measured circuit in-hand micro-climate. . . . . . the warm and moist “climate” created when cupping the sensor in ones hand. in-situ . . . . . . . . . . . . . . . . . . measurement with sensor located in the process stream intrinsically safe . . . . . . . . . .
XDT User’s Manual RG58 . . . . . . . . . . . . . . . . . . . a type of coaxial cable - the letters/numbers refer to the electrical characteristic of the cable (resistance/capacitance per foot of length) RG6 . . . . . . . . . . . . . . . . . . . . A type of coaxial cable - the letters/numbers refer to the electrical characteristic of the cable (resistance/capacitance per foot of length) RS-232C . . . . . . . . . . . . . . . .
XDT User’s Manual Appendices Appendix A: Flow Diagram of Operating State User Interface 30 seconds anywhere (other than "Calibration") without key press Power ON initialization and sign on message appears when changing settings of locked unit Toggle Pressure Correction HI/LO ˚C PSI 1/2 sec Viewing Dewpoint Flashing PSI indicates pressure corrected dewpoint { Flashing HI and/or LO indicates corresponding relays not energized DEWPOINT units SHORT PRESS LONG PRESS AND PSI MODE SET HI Toggle 14.
XDT User’s Manual Appendices Flow Diagram Operating State User Interface (continued) Manual & Scheduled Self Calibration Flow diagram items not related to Self Calibration are shaded in gray.
XDT User’s Manual Appendices Appendix B: Flow Diagram of Set-Up State User Interface Power-Up with MODE key depressed Power ON initialization and sign on message appears when changing settings of locked unit LOC go to Operating State 4 min anywhere without key press Choose alternate units to show when displaying dewpoint. SET ALT/DSP blank ˚F ˚C ppm LBS G/m3 PSI % ˚C˚F Temp˚F Temp˚C { Factory default is blank, (there is no alternate display).
cable with molded-on male BNC connector Viton A O-ring female BNC connector UR TA 0 0 5 P P C- ~1.45" XEN H 40 3/4"-16 14mm x 1.25mm D TE LIS NM 76 2.230" 3" min 1 flats for 1 / 4 " wrench XDT User’s Manual Appendices 5/16"-24 tension washer Appendix C: Sensor Mechanical Removable Sensor encapsulated in 100 sintered stainless steel, unscrew to remove.
XDT User’s Manual Appendices Appendix D: Optional Sensor Fittings 41
XDT User’s Manual Appendices Appendix E: XDT Circuit Board Dimensions 4.250" 3.875" 3.502" 0.155" Optional Key Pad Connector 0.146" 0.335" 0.195" 2.125" TOP VIEW SIDE VIEW 0.44" 0.627" C US 0.965" DEWPOINT TRANSMITTER 0.662" M O D E 1 C L C L S2 AY PL 0.740" S DI 2.315" S1 A In udi di o ca to r 1.030" 0.805" 1.853" 1.453" 1.052" XDT (C) 1999 XENTAUR CORP. R S3 0.5" 2.140" J.F.M.A.M.J.J.A.S.O.N.D 4.630" score line, break to fit in PM box 5.145" MADE IN USA 4.935" 4.
XDT User’s Manual Appendices 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 mounting brackets) 43
XDT User’s Manual Appendices Appendix E (continued): XDT-NEMA Enclosure Mounting Dimensions 44
XDT User’s Manual Appendices Appendix F: Sensor/SpanCheck™ Theory of Operation ns o Se ew N Capacitance (nF) 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 gases into or out of the Aluminum Oxide pores.
XDT User’s Manual Appendices Appendix G: Dewpoint Response time Analysis Manufacturers of dewpoint sensors will make unbelievable claims of speed. But without supporting data revealing the conditions under which the measurements were made, such as flow rate, temperature, the dewpoint at which the test was performed, and most importantly the units of measure. This last aspect can be extremely deceiving, consider the following example.
XDT User’s Manual Appendices Of course analyzing on a wet-up step will produce much faster results, because all sensors are fast on wet up, since Al2O3 (like most materials) adsorbs faster than it desorbs. Testing with a small step e.g. in the -10°C to 0°C dewpoint range will produce even faster results, and allow manufacturers to make far-fetched claims of response time of 5seconds for a 90% of step change.
XDT User’s Manual Appendices Appendix H: Sample Gas Filter Considerations Sample treatment with pre-filtering may be a necessity in many instances. However the filter housing and element may affect the dewpoint reading and/or the response time of the system. Below is a graph comparing measurements from the same calibrated sensor with and without a filter utilizing a polycarbonate bowl. All other parameters, which may affect the measurement, were kept constant.
XDT User’s Manual Appendices Appendix I: XDT Grounding Considerations Sensor Measuring Circuitry 0.1uf 1M Ohm 33V 400W Not Connected 4 AC GROUND 5 SIG-IN 6 SIG-RET 7 A-OUT Earth Safety Ground Facility AC Power o AC NEUTRAL 3 white lo RFI filter board AC LIVE 2 d 0.0047uf 1 un 275VAC Sensor black 8 A-RET 9 TxD N O T cause gro Module 0.0047uf 0.1uf Sensor casing connects to piping con ne cti o Analog Output 4/20mA nt h ro s 0.5A 250V 4.
XDT User’s Manual Appendices Appendix J: Analog Output vs. Dewpoint The current output of the XDT, varies with the measured dewpoint. 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: (I – Z) × (H – L) D = ----------------------------------------- + L S where: I = current supplied by XDT analog output in mA. Z = value of zero output of current loop in mA: for 4/20 = 4, for 0/24 = 0.
XDT User’s Manual Appendices -100°C to +20°C settings, because the 4-20mA provides sufficient resolution to measure the output better than the specified accuracy of the sensor. Relationship of 4-20mA output and instrument reading in ppmV or LBS Instrument reading in ppmV 10 20mA 100 5˚ C 8. -3 = e ng ra AO Hi gh 5˚ C 5. Lo w AO ra ng e = -6 4.5mA 4.1mA 0.1 1.97 LBS = -50˚C = 38.83 ppmV 4/20 mA output 5mA 00 e = ˚C 0˚ e ng h g Hi AO ra = +2 C 289.1 LBS = 0˚C = 6063.
XDT User’s Manual Appendices Appendix K: RS-232C Interface Protocol The instrument uses a simple protocol to communicate to a host computer through its RS-232C interface, see section 3.3.2.5 for electrical connections. The interface is configured as 9600 baud, Even Parity, 8 Bits, 1 Stop; and it echoes all received characters. To illustrate the protocol, the following notation conventions are used in this section: The characters sent or received are depicted in bold.
XDT User’s Manual Appendices The mode argument is optional and may be specified only if an interval was specified. It may be “N” for numeric reporting or “G” for graphic reporting of the measurement. The mode argument defaults to numeric mode. The graphic mode may be chosen only for °C or °F, it will plot a graph of the measurement on printers which can respond to the Epson Graphic Commands, and have at least 80 character columns.
XDT User’s Manual Appendices The printer should have at least 80 character columns, and it is best to use continuous form paper. “?” command Requests a single report of the measurement in the currently selected format. send:?CR The unit will respond in the format selected with the Data command, for example: receive: BL-59.3degCSP01:23:45SPNoAlrmCRLF The default factory setting for the instrument is to respond in numeric format in the user chosen units.
XDT User’s Manual Appendices Appendix L: Procedure for Exchanging XDT Sensors To exchange sensors one must know the measured low attenuation of the sensor at some low dewpoint as well as the calibration adjustment value. These numbers can be found on the shipping container serial number label. Through the following steps it is helpful to refer to Appendix A: Flow Diagram of XDT Set-Up State User Interface 1. Power up (or reset) the XDT while holding down the MODE key, in order to enter the Set-Up state.
XDT User’s Manual Appendices Appendix M: Uncertainty in LBS & ppmV calculations Uncertainty of LBS & ppmV calculations due to +/-3°C measurement accuracy 29 48 44 38 34 600 1000 900 800 700 24 19 15 10 5 2.5 1 0.5 0.25 0.1 0.05 Calculated LBS H2O / mmscf -20 -25 -30 Measured Dewpoint °C -35 -40 -45 -50 -55 -60 int po Dew -65 -3°C -70 3°C nt + oi ewp D -75 -80 9 8 7 500 400 300 200 100 90 80 70 60 56 50 40 30 20 10 5 6 4 3 2 1 0.9 0.8 0.7 0.6 0.
Appendix M: Return Authorization Number Request Form Xentaur Return Authorization Number Request Form • • • • Xentaur must approve and assign a Return Authorization Number (RAN) to any instrument being returned. The RAN must appear on all paperwork and packaging. The issuance of a RAN does not automatically imply that the instrument is covered by our warranty.
Index Symbols °C .........................................................17 °F ..........................................................17 A AC power voltage ................................10 accuracy °C,°F specification .............................4 calculated lbs or ppmV ....................56 adjusting low sensor attenuation and dewpoint ..............................26 alarms checking ...........................................19 present setup ....................................19 relay contacts .
Index copper tubing .........................................6 copyright .................................................i corrosive gases .................................3, 20 CSA ......................................................13 cUL ........................................................4 current loop computations ....................................50 linearity ............................................50 load ...................................................14 range setting ..............
Index NPL ........................................................1 O oil ...........................................................3 operating state ......................................17 operating state flow diagram ................37 optionally ordered features/capabilities .1 outdoor installation ................................9 outputs ..................................................10 overview .................................................1 P parts per million by volume .................
Index 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 ..............................
XENTAUR CORPORATION, 84F HORSEBLOCK ROAD, YAPHANK, NY 11980 U.S.A.
