Teledyne 8800A, Operating Instructions Manual

Page: 37 / 72

8800 Series Trace Moisture Analyzer Instruction 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 C heck S um F ailed. return to your representative
ERR/AD
+
A/D converter failure.
sy
st
em
te
st
s
on
ce p
er 2
m
in
.
for service.
ERR/REF
+ Ref erence voltage for A/D out of spec.
LO/BAT
+ Lo w supply voltage.
LO
RNG/
+
TEMP
Instrument lo w temp erature rang e
has been exceeded. make sure that the unit is at a
HI
RNG/
+
TEMP
Instrument hi gh temp erature rang e
has been exceeded.
temperature of -10°C to +50°C.
OPN/
+ Sensor circuit is open .
dewpoint dis
play
te
st
s
SAT/
+ Sensor is sat urated. see table in sensor troubleshooting section 2.5
SHR/
+ Sensor circuit is shor ted.
...
Trying to calculate dewpoint for undefined sensor. select sensor and recalibrate.
DB
+ Trying to calibrate an undefined sensor.
cal
ib
ra
tio
n
te
st
s
see calibration instructions.
SEN/2LO
+ Sen sor reading is ‘ too’ lo w 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
+ EEP ROM write cycle not completed.
m
is
cel
laneous
if this persists, return for service.
LOC
+ Attempting to modify a loc ked unit. unlock unit, see set-up state 3.4.5.-10.
SEC
+ Attempting to unlock a sec ured 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, Xen ( Greek
Ξ
=X)
display is dark
No power to instrument check power to instrument, check fuse