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Epson XDT manual display is dark, Legend denotes a beeping accompaniment to the message

Models: XDT

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Page 37

XDT User’s Manual

		DISPLAY		EXPLANATION			REQUIRED ACTION


	LO	ERR		PROM check sum failed.	tests

	HI	ERR		RAM write/read test failed.			cycle power
	HI	ERR		RAM write/read test failed.	on		cycle power
					on
	%	ERR		Unidentified power-up failure.	power		if problem persists,

	C.S.F/			EEPROM Check Sum Failed.			return to your representative
	C.S.F/			EEPROM Check Sum Failed.			return to your representative

	ERR/AD			A/D converter failure.	2 min.		for service.

	ERR/REF			Reference voltage for A/D out of spec.
					per
	LO/BAT			Low supply voltage.	per
	LO/BAT			Low supply voltage.	once


	LO RNG/			Instrument low temperature range	tests
	TEMP			has been exceeded.	tests		make sure that the unit is at a
	TEMP			has been exceeded.	system		make sure that the unit is at a

	HI	RNG/		Instrument high temperature range			temperature of -10°C to +50°C.
	TEMP			has been exceeded.

	OPN/			Sensor circuit is open.	dewpoint display

	SAT/			Sensor is saturated.		tests	see table in sensor troubleshooting section 2.5

	SHR/			Sensor circuit is shorted.

	...			Trying to calculate dewpoint for undefined sensor.			select sensor and recalibrate.
	...			Trying to calculate dewpoint for undefined sensor.			select sensor and recalibrate.

	DB			Trying to calibrate an undefined sensor.	calibration
						tests	see calibration instructions.
	SEN/2LO			Sensor reading is ‘too’ low to be from a saturated sensor,			see calibration instructions.
	SEN/2LO			Sensor reading is ‘too’ low to be from a saturated sensor,
				thus can not be calibrated

	2LO			While Compensating for cable length, the measurement did not	cable	tests	Check the means of opening & shorting the sensor
				correspond to the expected open or short values.			cable. see section 3.4.5 - 11
	2HI			correspond to the expected open or short values.			cable. see section 3.4.5 - 11



	ERR/EEP			EEPROM write cycle not completed.			if this persists, return for service.

	LOC			Attempting to modify a locked unit.			unlock unit, see set-up state 3.4.5.-10.

	SEC			Attempting to unlock a secured unit.

	HI	(flashing	while	The HI Alarm (alarm #1) relay is deenergized.			See section 3.4.4.2 Setting the Alarms.
	viewing DEWPOINT)

	LO	(flashing	while	The LO Alarm (alarm #2) relay is deenergized.
	viewing DEWPOINT)				miscellaneous

	A.O./OPN			The Analog Output ‘sees’ an open circuit			check the cables connecting the analog output, make
							sure the terminating impedance is less that 500Ω.

	PSI flashing when dis-			Pressure correction is enabled, the dewpoint is computed using			refer to section 3.4.4.1
	PSI flashing when dis-						refer to section 3.4.4.1
	playing dewpoint			programmed pressures

	-70°C (-94°F) with			An XTR-65 sensor is measuring less than -70°C or -94°F D.P.			check instrument
	flashing DEWPOINT						upgrade to XTR-100 sensor

	RNG			number can not be displayed in 3½ digits

	XEN			Turn on message, Xentaur (Greek Ξ=X)

	display is dark			No power to instrument			check power to instrument, check fuse

Legend: denotes a beeping accompaniment to the message.

/denotes alternately flashing messages.

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Image 37

Epson XDT display is dark, Legend denotes a beeping accompaniment to the message, denotes alternately flashing messages

Contents

yyyyyyyy Sensor Serial No Instrument Serial No Acrobat is a trademark of Adobe Systems Incorporated Swagelok, Cajon are trademarks of SWAGELOK CoEpson is a registered trademark of Seiko Epson Corporation 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 2.3 Sensor Installation & Sampling Techniques 2.2 Sensor Technical SpecificationsNOT RECOMMENDED 2.3.1 In-situ Installation2.3.2 Extractive Installation 2.4 Mechanical Installation Symptom 2.5 Troubleshooting unexpected readingsDiagnostic/Remedy Possible Cause3.1.1 Electromagnetic Compatibility Considerations 3. Instrument 3.1 Precautions using the XDTInput resolution 3.2 Instrument Technical SpecificationsAlarm relay contacts Mains Supply Voltage3.3.1 Instrument Mechanical Installation 3.3 Installation3.3.1.1 XDT-PM DIN43700 Enclosure Installation 3.3.1.2 XDT-NEMA IP65 Enclosure Installation3.3.2 Electrical Connections 3.3.2.1 Connecting PowerSENSOR CABLE 3.3.2.1.2 Low Voltage DC Powered Option - Electrical Power Connection 3.3.2.1.1 AC Mains Electrical Power Connection3.3.2.3 Wiring the Alarm Contacts 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 0 12 3 4 5 6 7 3.4.2 Display ConventionsABCDEF GH IJ LNOP QRS TUXYZ 3.4.3 Push Buttons3.4.4.1 Viewing Dewpoint Mode 3.4.4 Operating Stateparts per million by volume computed at the sensor pressure more about pressure later. The LBS 3.4.4.2 Alarms 3.4.4.3 Start Calibration HI **** ˚C3.4.4.3.1 SpanCheck Mode 3.4.4.3.2 Single Point Self Calibration, manual or scheduled Page XDT User’s Manual 3.4.4.4 Viewing Serial Number Mode 3.4.5 SetUp Stateb. SpanCheck the sensor c. Dry-down the sensor for at least 12 hrs Secured Password Protection the hook-up and testing of the user’s monitoring equipment3.5 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 Spare parts may be ordered through your representative 3.7 MaintenanceXDT 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 16.24˚C˚F Appendix B Flow Diagram of Set-Up State User InterfaceSETCNF/CBL/SHR SET SHR SETCNF/CBL/OPN SET OPN SET END SETSEN/XT1unitsC Sensor Mechanical Appendixcable with molded-on male BNC connector female BNC connector 2.230XDT User’s Manual Appendices Appendix D Optional Sensor FittingsTerminal Connector Appendix E XDT Circuit Board DimensionsTOP VIEW SIDE VIEWStandard mounting with clip-on compression brackets Appendix E continued XDT-PM Enclosure Mounting DimensionsEnvironmentally sealed mounting with gasket and clip-on screw clamp mounting bracketsXDT User’s Manual Appendices Appendix E continued XDT-NEMA Enclosure Mounting DimensionsAppendix 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 Tested Instrument ˚C Appendix H Sample Gas Filter Considerations85 -80 -75 -70 -65 -60 -55 -50 Chilled mirror reference instrument MBW ˚CAC Power Appendix I XDT Grounding ConsiderationsFacility SensorAppendix J Analog Output vs. Dewpoint Relationship of 4-20mA output and instrument reading in ppmV or LBS HELP command Appendix K RS-232C Interface ProtocolReset LoginBLBLErrorStringCRLF BLMeasurement UnitsSPElapsed TimeSPAlarm StatusCRLF“Error SensOpen” or “Error SensShort” or “Error SensSat” S C K n mSerial Number Command “?” commandWho Command Reset CommandState User Interface Appendix L Procedure for Exchanging XDT SensorsDewpoint Appendix M Uncertainty in LBS & ppmV calculationsDewpoint Appendix M Return Authorization Number Request Form Xentaur Return Authorization Number Request FormTo obtain a RAN fill out this form and fax to CustomerPage Index SymbolsPage Page water