Teledyne IR-7000 - Non-dispersive infrared series - Manual (Page 70)

Maintenance 6 IR7000
62
Teledyne Analytical Instruments., - Rev. 3
6.3.1 Error Messages
M ESSAGE D ESCRIPTION C ORRECTIVE A CTION
NEED GOOD CALS
The battery backed ram
memory has been lost.
Normal display will return after valid
zero and upscale calibrations have been
performed.
IR ZERO CAL FAIL
[CAUSE]
CALS RESTORED
OR
NEED GOOD CALS
A zero calibration was
attempted and did not
succeed. Cause of the
failure will be displayed.
Insufficient cell purge. Increase CAL
DELAY period or purge time.
Check for proper zero gas.
Check sample system for leaks.
IR UPSC CAL FAIL
[CAUSE]
OLD CALS RESTORED
A span calibration was
attempted and did not
succeed. Cause of the
failure will be displayed.
Insufficient cell purge. Increase CAL
DELAY period for AUTOmatic
calibrations or increase purge time for
MANUAL calibrations.
Check for proper span gas.
Check sample system for leaks.
IR LOW FLOW FAIL
While a calibration was
attempted, the signal from
the detector drifted in one
direction. Insufficient cell purge. Increase CAL
DELAY period for AUTOmatic
calibrations or increase purge time for
MANUAL calibrations.
NOTE: The IR LOW FLOW FAIL message will occur only after the instrument has made 5
attempts (50 seconds each) to capture a level value.
IR CAL SPAN FAIL
A calibration was
attempted that did not
produce a sufficient
difference between zero
and span gases. Most frequently, this is caused by
attempting a full calibration on the
SAMPLE gas. The instrument will
zero calibrate on your sample gas if
requested to do so!
NEED GOOD CALS
No previous successful
calibration data exists in
memory. Old calibration
data cannot be restored.
Check that the SETUP: CAL GAS
value has been set to the labeled value
on the tank of calibration gas.
Memory backup battery is discharged.
Replace.
IR CAL RESTORED
A calibration failed for
one of the above reasons.
The data from the most
recent calibration is
restored as the current
value.