COSA Xentaur Xentaur LPDT - Manual (Page 36)

Section 3: Instrument
page 29
Legend: denotes alternately flashing messages.
DISPLAY EXPLANATION REQUIRED ACTION
LO (55 PROM check sum failed.
pow
er
on t
es
ts
HI (55 RAM write/read test failed. cycle power
% (55 Unidentified power-up failure. if problem persists,
&6) EEPROM Check Sum Failed. return to your representative
(55$' A/D converter failure.
s
y
st
em
t
es
ts
onc
e pe
r 2 m
in.
for service.
(555() Reference voltage for A/D out of spec.
/2%$7 Low supply voltage. check input voltage 10-33VDC
LO 51*
TEMP
Instrument low temperature range
has been exceeded. make sure that the unit is at a
HI 51*
TEMP
Instrument high temperature range
has been exceeded.
temperature of -10°C to +70°C.
231 Sensor circuit is open.
de
w
poi
nt
di
sp
la
y t
e
st
s
see table in
6$7 Sensor is saturated. sensor troubleshooting
6+5 Sensor circuit is shorted. section
 Trying to calculate dewpoint for
undefined sensor.
select sensor and
SpanCheck.
'% Trying to calibrate an undefined
sensor.
Ca
li
bra
ti on. t
es
ts see Calibration instructions.
6(1/2 Sensor reading is ‘too’ low to be a satu-
rated sensor, for SpanCheck.
(55((3 EEPROM write cycle not completed.
m
is
c el
la
ne
ous
if this persists, return for service.
/2& Attempting to modify a locked unit. unlock unit, see set-up mode.
51* number can not be displayed in 3.5 digits.
°C( °F)
w/flashing
DEWPOINT
An XTR-65 sensor is measuring less
than -70°C or -94°F dewpoint.
PSI flashing
when dew
Pressure correction is enabled.
;(1 Turn on message, Xentaur (Greek Ξ =X)