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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.: _______________ Your Representative is: Except as may be provided by contract, this document and all specifica- tions and drawings contained are the property of Xentaur Corporation, are issued in strict confidence, and shall no
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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. The customer agrees that in accepting and using this instrument Xen- taur Corporation’s liability arising from or in any way connected with this instrument shall be limited exclusively to performing a new ca
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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, connec- torized 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.
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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 va
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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 ..........................................................
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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 ....................................................................46 Appendix H: Samp
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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 Xen- taur 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 accordin
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XDT User’s Manual 2
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Section 2: Sensor and Sampling Techniques 2. Sensor and Sampling Techniques 2.1 Precautions using the sensor The Xentaur HTF™ Al O sensor is designed and field proven to be highly reliable, rugged and 2 3 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 sam- ple outlet must exhaust to a safe place. Check the sample line for leaks before and after connecting. If measuring
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XDT User’s Manual 2.2 Sensor Technical Specifications Type: ..................................Hyper Thin Film HTF™ high capacitance Al O . 2 3 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:.....
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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 operat- ing specifications of the sensor, and there is no chance of liquids coalescing. Examples of applica- tions suited for in-situ installations are: pure gases, output of desiccant dryers (for instrument air), glove boxes, etc. For mo
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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 enclo- sure. Refer to the ESS literature for more information. If the resources to make your own sample system are available, the following two diagrams may be used
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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. Do not install any devices upstream of the sensor, such as other measu
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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
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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 Electri- cal Code article 400, and/or other nationally or locally recognized procedures relevant to your installation. You will most probably require a
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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 2.95” DIN 43
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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 Sec- tion 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. These brackets allow the user to mount and sec
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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 0.5A 250V 4.3mH 1 AC LIVE Power Supply Module 0.1uf 275VAC AC Power Input: 2 AC NEUTRAL 0.0047uf 0.0047uf 100 to 250VAC, 50/60Hz, 10VA 3 Not Connected RFI filter board 4 AC GROUND white 5 SIG-IN Sensor Measuring SENSOR CABLE Circuitry 6 SIG-RET black 0.1uf 1M Ohm 33V 400W 7 A-OUT Analog Output 4/20mA or 0/24mA or Voltage * Logi
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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 particu- lar installation, it should have a label specifying the certifications and the approving agency. Then follow the appropriate control drawing as well as
