Teledyne 3000TA-XL-EU Operating Instructions Manual page 98

Maintenance 3000TA-XL-EU
Solution:
Turn the analyzer off, then turn back on again. Press the System key
when prompted by the analyzer "Press System for Default Values". This
will return the analyzer to its default settings in calibration and zero
values. If erratic behavior continues clean sensor contacts or replace the
sensor.
Possible Cause:
Atmospheric oxygen may be diffusing in through the vent and affecting
the oxygen level which the sensor sees.
Solution:
Increase flow rate and/or length or vent tubing in order to dilute or
minimize the diffusion of oxygen from the vent back to the sensor.
Inaccurate zero operation (i.e. the user has zeroed the
Problem:
analyzer accidentally on gas much higher than one would normally use
for a zero gas).
Solution:
Turn the analyzer off, then back on again. Press the System key when
prompted by the analyzer "Press System for Default Values". This will
return the analyzer to its default settings in calibration and zero values.
Now proceed to carefully calibrate and zero the analyzer.
Teledyne Analytical Instruments 82