Teledyne 3000ZA-3X - Trace oxygen analyzer - Manual (Page 63)

Trace Oxygen Analyzer Maintenance
Teledyne Analytical Instruments 51
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 the UP and
DOWN key
simultaneously while
the instrument is
doing the warm up
count down.
Press the ENTER to
confirm returning the
analyzer to factor
defaults.
Re-span each of the
sensors without doing
the zero.
If the analyzer seems
to be working Ok, up
to this point, retry to
zero.