Teledyne 3010TB - Split architecture trace oxygen analyzer - Manual (Page 50)

4 Operation Model 3010TB
4-22: Part I
Teledyne Analytical Instruments
IMPORTANT: In the event of loss of flow through the analyzer, if the
vent is vented to a location of high oxygen content,
oxygen will back diffuse through the vent line and in
most cases quickly saturate the cell with oxygen which
can then require a quite long purge down time for
the sensor when then exposed to low oxygen concen-
trations. In the event that flow is to be interrupted into
the analyzer, it is suggested that the user do one of the
following:
1. Bag the sensor in nitrogen during this time
2. Install a shut off valve on the vent port of the ana-
lyzer or somewhere within the users sample system.