Xdt user’s manual 30, Display explanation required action, Display is dark – Epson XDT User Manual
Page 37
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 tes
ts
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.
s
y
st
em
tes
ts
once p
er
2
mi
n.
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 dis
p
lay
te
st
s
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.
cal
ib
ra
ti
o
n
te
st
s
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.
cabl
e
te
st
s
Check the means of opening & shorting the sensor
cable. see section 3.4.5 - 11
2HI
ERR/EEP
EEPROM write cycle not completed.
m
is
cel
laneous
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 500
Ω.
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