Epson XDT manual Display Explanation Required Action

XDT User’s Manual

	DISPLAY		EXPLANATION			REQUIRED ACTION
LO	ERR		PROM check sum failed.	tests
HI	ERR		RAM write/read test failed.			cycle power
				on
%	ERR		Unidentified power-up failure.	power		if problem persists,
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.
				once
LO RNG/			Instrument low temperature range	tests
TEMP			has been exceeded.			make sure that the unit is at a
				system
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.
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,
			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
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
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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