Teledyne IR-7000 - Non-dispersive infrared series - Manual (Page 71)

NDIR Gas Analyzer Maintenance 6
Teledyne Analytical Instruments., - Rev. 3 63
LINEARIZER ERROR
The linearizer software
has failed in the self-
diagnostic test while in
use.
Press either UP or DOWN key to
acknowledge the alarm and continue
normal operation.
If the message occurs again, turn the
instrument off for 10 seconds then
power back up.
LINEARIZER FAILURE
The linearizer software
has failed during the
power –up self-diagnostic
test.
To clear the message, turn the
instrument off for 10 seconds, then
power back up.
If the message re-occurs, discontinue
use of the instrument and contact LSC.
CALVALUE CHANGED
The stored calibration
readings have failed in
the continuous self-test.
Press either UP or DOWN key to
acknowledge the alarm and continue
normal operation.
If the message occurs again, turn the
instrument off for 10 seconds then
power back up.
If the message re-occurs, discontinue
use of the instrument and contact LSC.
NO EPROM PRESENT
Some portion of the
permanent memory is not
available to the
microprocessor.
Turn the instrument off for 10 seconds,
then power back up.
If the message re-occurs, discontinue
use of the instrument and contact LSC.
EXTERNAL RAM FAILURE
Some portion of the
addressable memory is
failing initialization self-
test.
Turn the instrument off for 10 seconds,
then power back up.
If the message re-occurs, discontinue
use of the instrument and contact LSC.
NO DATA READY FAILURE
A hardware fault has been
detected in the main
board.
To clear the message, turn the
instrument off for 10 seconds, then
power back up.
If the message re-occurs, discontinue
use of the instrument and contact LSC.
O2 SENSOR FAIL
The digitized oxygen
sensor is significantly out
of range.
Replace the O
2
sensor.
If the message re-occurs, discontinue
use of the instrument and contact LSC.
O2 ZERO FAIL
[CAUSE]
OXYCALS RESTORED
NEED GOOD CALS
An O
2
zero calibration
was attempted and did not
succeed.
Insufficient cell purge. Increase CAL
DELAY period or purge time.
Check for proper zero gas.
Check sample system for leaks.