Teledyne 8800A Operating Instructions Manual page 37

8800 Series Trace Moisture Analyzer Instruction Manual
DISPLAY
LO ERR +
HI ERR +
% ERR +
+
C.S.F/
+
ERR/AD
+
ERR/REF
+
LO/BAT
LO RNG/ +
TEMP
HI RNG/ +
TEMP
+
OPN/
+
SAT/
+
SHR/
...
+
DB
+ Sensor reading is 'too' low to be from a saturated sensor,
SEN/2LO
While Compensating for cable length, the measurement did not
2LO
2HI
+
ERR/EEP
+
LOC
+
SEC
HI (flashing while
viewing DEWPOINT)
LO (flashing while
viewing DEWPOINT)
+
A.O./OPN
PSI flashing when dis- Pressure correction is enabled, the dewpoint is computed using
playing dewpoint
-70°C (-94°F) with An XTR-65 sensor is measuring less than -70°C or -94°F D.P.
flashing DEWPOINT
RNG
+
XEN
display is dark
Legend: + denotes a beeping accompaniment to the message.
denotes alternately flashing messages.
/
EXPLANATION
PROM check sum failed.
RAM write/read test failed.
Unidentified power-up failure.
EEPROM Check Sum Failed.
A/D converter failure.
Reference voltage for A/D out of spec.
Low supply voltage.
Instrument low temperature range
has been exceeded.
Instrument high temperature range
has been exceeded.
Sensor circuit is open.
Sensor is saturated.
Sensor circuit is shorted.
Trying to calculate dewpoint for undefined sensor.
Trying to calibrate an undefined sensor.
thus can not be calibrated
correspond to the expected open or short values.
EEPROM write cycle not completed.
Attempting to modify a locked unit.
Attempting to unlock a secured unit.
The HI Alarm (alarm #1) relay is deenergized.
The LO Alarm (alarm #2) relay is deenergized.
The Analog Output 'sees' an open circuit
programmed pressures
number can not be displayed in 3½ digits
Turn on message, Xen (Greek Ξ=X)
No power to instrument
see table in sensor troubleshooting section 2.5
Check the means of opening & shorting the sensor
check the cables connecting the analog output, make
sure the terminating impedance is less that 500Ω.
30
REQUIRED ACTION
cycle power
if problem persists,
return to your representative
for service.
make sure that the unit is at a
temperature of -10°C to +50°C.
select sensor and recalibrate.
see calibration instructions.
cable. see section 3.4.5 - 11
if this persists, return for service.
unlock unit, see set-up state 3.4.5.-10.
See section 3.4.4.2 Setting the Alarms.
refer to section 3.4.4.1
check instrument
upgrade to XTR-100 sensor
check power to instrument, check fuse