Teledyne 3000TA - General purpose trace oxygen analyzer - Manual (Page 17)

2-5
Trace Oxygen Analyzer Operational Theory 2
Teledyne Analytical Instruments
Figure 2-3. Characteristic Input/Output Curve for a Micro-Fuel Cell
2.3 Sample System
The sample system delivers gases to the Micro-Fuel Cell sensor from
the analyzer rear panel inlet. Depending on the mode of operation either
sample or calibration gas is delivered.
The Model 3000TA sample system is designed and fabricated to
ensure that the oxygen concentration of the gas is not altered as it travels
through the sample system. The sample encounters almost no dead space.
This minimizes residual gas pockets that can interfere with trace analysis.
The sample system for the standard instrument incorporates ¼ inch
tube fittings for sample inlet and outlet connections at the rear panel. For
metric system installations, 6 mm adapters are supplied with each instru-
ment to be used if needed. The sample or calibration gas flows through the
system is monitored by a flowmeter downstream from the cell. Figure 2-4
shows the piping layout and flow diagram for the standard model.