Teledyne 3000ZA2G - Zirconium oxide analyzer - Manual (Page 22)

Operational Theory 3000ZA2G
Teledyne Analytical Instruments 10
Figure 2-2: Zirconia Sensor Assembly
2.3 Sample System
The sample system delivers gases to the ZrO
2
sensor from the
analyzer rear panel inlet. Depending on the mode of operation either
sample or calibration gas is delivered.
The Model 3000ZA2G 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 system for the standard instrument incorporates 1/8”
tube fittings for sample inlet and outlet at the rear panel. The sample or
calibration gas that flows through the system is monitored by a
flowmeter downstream from the cell.
Figure 2-3 shows the flow diagram. Shaded portions of the diagram
pertain to instruments with other options as listed. In the standard
instrument, calibration gases can be connected directly to the Sample In
port by teeing to the port with appropriate valves.