Teledyne 3000ZA - Trace oxygen analyzer - Manual (Page 69)

Trace Oxygen Analyzer Maintenance
Teledyne Analytical Instruments 57
analyzer.
2. If erratic behavior
continues, replace
sensor.
Atmospheric oxygen
diffusing through vent
and altering the
oxygen level the
sensor sees Increase flow rate
and/or length of vent
tubing to dilute or
minimize oxygen
diffusion from vent to
sensor.
Inaccurate zero
operation (i.e. user has
zeroed the instrument
using a gas concen-
tration much higher
than normal for a zero
gas). Turn analyzer off,
then back on again.
Press System key
when prompted by
analyzer “Press
System for Default
Values”. This will
return the analyzer to
default calibration and
zero settings. Now
proceed to carefully
calibrate and zero the
analyzer.