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XDT User’s Manual
30
Legend: denotes a beeping accompaniment to the message.
/ denotes alternately flashing messages.
DISPLAY EXPLANATION REQUIRED ACTION
LO ERR PROM check sum failed.
power on tests
HI ERR RAM write/read test failed. cycle power
% ERR Unidentified power-up failure. if problem persists,
C.S.F/ EEPROM Check Sum Failed. return to your representative
ERR/AD A/D converter failure.
system tests once per 2 min.
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. make sure that the unit is at a
HI RNG/
TEMP
Instrument high temperature range
has been exceeded.
temperature of -10°C to +50°C.
OPN/ Sensor circuit is open.
dewpoint display
tests
SAT/ Sensor is saturated. 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
correspond to the expected open or short values.
cable
tests
Check the means of opening & shorting the sensor
cable. see section 3.4.5 - 11
2HI
ERR/EEP EEPROM write cycle not completed.
miscellaneous
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
viewing DEWPOINT)
The HI Alarm (alarm #1) relay is deenergized. See section 3.4.4.2 Setting the Alarms.
LO (flashing while
viewing DEWPOINT)
The LO Alarm (alarm #2) relay is deenergized.
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-
playing dewpoint
Pressure correction is enabled, the dewpoint is computed using
programmed pressures
refer to section 3.4.4.1
-70°C (-94°F) with
flashing DEWPOINT
An XTR-65 sensor is measuring less than -70°C or -94°F D.P. check instrument
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