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Epson XDT manual Relationship of 4-20mA output and instrument reading in ppmV or LBS

Models: XDT

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Relationship of 4-20mA output and instrument reading in ppmV or LBS

XDT User’s Manual Appendices

-100°C to +20°C settings, because the 4-20mA provides sufficient resolution to measure the out- put better than the specified accuracy of the sensor.

Relationship of 4-20mA output and instrument reading in ppmV or LBS

Instrument reading in ppmV

20mA

10

100

1000

10000

49.3 LBS =

12mA

0.56 LBS =

289.1 LBS

.5

˚

C

-20˚C

= 0˚C

8mA

-60˚C

=

-38

range

AO

= 1019.3 ppmV

˚C

=

+20

.=1066ppmV

High

.197LBS =

range

.=86063ppmV

5mA

AO

4/20mAoutput

˚

C

High

.5

-

50˚

4.5mA

-

65

˚C

=

C = 38

range

-100

range

=

AO

Low

.83

AO

ppmV

Low

4.1mA

0.1

1

10

100

1000

Instrument reading in LBS of H2O / million cubic feet

51

Image 58

Epson XDT manual Relationship of 4-20mA output and instrument reading in ppmV or LBS

Contents

yyyyyyyy Sensor Serial No Instrument Serial No Epson is a registered trademark of Seiko Epson Corporation Swagelok, Cajon are trademarks of SWAGELOK CoAcrobat is a trademark of Adobe Systems Incorporated Microsoft Windows is a registered trademark of Microsoft CorporationWarning Labels Warranty Table of Contents Appendix D Optional Sensor Fittings 1.0 Overview of the XDT XDT User’s Manual 2. Sensor and Sampling Techniques 2.1 Precautions using the sensor 2.2 Sensor Technical Specifications 2.3 Sensor Installation & Sampling Techniques2.3.1 In-situ Installation NOT RECOMMENDED2.3.2 Extractive Installation 2.4 Mechanical Installation Diagnostic/Remedy 2.5 Troubleshooting unexpected readingsSymptom Possible Cause3. Instrument 3.1 Precautions using the XDT 3.1.1 Electromagnetic Compatibility ConsiderationsAlarm relay contacts 3.2 Instrument Technical SpecificationsInput resolution Mains Supply Voltage3.3.1.1 XDT-PM DIN43700 Enclosure Installation 3.3 Installation3.3.1 Instrument Mechanical Installation 3.3.1.2 XDT-NEMA IP65 Enclosure Installation3.3.2 Electrical Connections 3.3.2.1 Connecting PowerSENSOR CABLE 3.3.2.3 Wiring the Alarm Contacts 3.3.2.1.1 AC Mains Electrical Power Connection3.3.2.1.2 Low Voltage DC Powered Option - Electrical Power Connection 3.3.2.2 Sensor Connection3.3.2.4 Interfacing to the Analog Output 3.3.2.5 Interfacing to the RS-232 option 3.4 Operating the Instrument3.4.1 Starting up ABCDEF GH IJ LNOP QRS TUXYZ 3.4.2 Display Conventions0 12 3 4 5 6 7 3.4.3 Push Buttons3.4.4 Operating State 3.4.4.1 Viewing Dewpoint Modeparts per million by volume computed at the sensor pressure more about pressure later. The LBS 3.4.4.2 Alarms HI **** ˚C 3.4.4.3 Start Calibration3.4.4.3.1 SpanCheck Mode 3.4.4.3.2 Single Point Self Calibration, manual or scheduled Page XDT User’s Manual 3.4.5 SetUp State 3.4.4.4 Viewing Serial Number Modeb. SpanCheck the sensor c. Dry-down the sensor for at least 12 hrs the hook-up and testing of the user’s monitoring equipment Secured Password Protection3.5 Resetable Audio-Visual Alarm Option NFPA compliant 3.6 Troubleshooting the Instrument Legend denotes a beeping accompaniment to the message display is darkdenotes alternately flashing messages 3.7 Maintenance Spare parts may be ordered through your representativeXDT User’s Manual Glossary used for the circuit see 4/20 pounds of water per RG58 . . . . . . . . . . . . . . . . . . . a type of coaxial cable - the letters/numbers refer to the electrical characteristic of the cable resistance/capacitance per foot of length Cancel Calibration it is not performed Appendix A Flow Diagram of Operating State User InterfaceXDT User’s Manual Appendices Cancel Calibration it is not performed Flow diagram items not related to Self Calibration are shaded in grayhere SETCNF/CBL/SHR SET SHR SETCNF/CBL/OPN SET OPN SET END Appendix B Flow Diagram of Set-Up State User Interface16.24˚C˚F SETSEN/XT1unitscable with molded-on male BNC connector female BNC connector AppendixC Sensor Mechanical 2.230Appendix D Optional Sensor Fittings XDT User’s Manual AppendicesTOP VIEW Appendix E XDT Circuit Board DimensionsTerminal Connector SIDE VIEWEnvironmentally sealed mounting Appendix E continued XDT-PM Enclosure Mounting DimensionsStandard mounting with clip-on compression brackets with gasket and clip-on screw clamp mounting bracketsAppendix E continued XDT-NEMA Enclosure Mounting Dimensions XDT User’s Manual AppendicesAppendix F Sensor/SpanCheck Theory of Operation Appendix G Dewpoint Response time Analysis 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 -10C to 0C dewpoint range will produce even faster results, and allow manufac- turers to make far-fetched claims of response time of 5seconds for a 90% of step change. The cus- tomer has to be aware of these manipulations of data and be able to ascertain the real-world response time they can expect out of a sensor 85 -80 -75 -70 -65 -60 -55 -50 -45 Appendix H Sample Gas Filter ConsiderationsTested Instrument ˚C Chilled mirror reference instrument MBW ˚CFacility Appendix I XDT Grounding ConsiderationsAC Power SensorAppendix J Analog Output vs. Dewpoint Relationship of 4-20mA output and instrument reading in ppmV or LBS Reset Appendix K RS-232C Interface ProtocolHELP command Login“Error SensOpen” or “Error SensShort” or “Error SensSat” BLMeasurement UnitsSPElapsed TimeSPAlarm StatusCRLFBLBLErrorStringCRLF S C K n mWho Command “?” commandSerial Number Command Reset CommandAppendix L Procedure for Exchanging XDT Sensors State User InterfaceDewpoint Appendix M Uncertainty in LBS & ppmV calculationsDewpoint To obtain a RAN fill out this form and fax to Xentaur Return Authorization Number Request FormAppendix M Return Authorization Number Request Form CustomerPage Symbols IndexPage Page water