Operational Theory 3000ZA
Teledyne Analytical Instruments 10
Figure 2-2: Flow Diagram with Options
2.4 Zirconium Oxide Sensor Application Notes
The following sample gases require conditioning prior to entering
the sensor:
• Flammable gases such as methane, alcohol and carbon
monoxide may cause a measurement error. They must be
filtered from the sample gas before entering the cell.
• Gases containing halogen atoms (F, Cl, Br, etc.) such as
Freon, must be filtered before entering the cell. The sensor
will be damaged by the decomposition of Freon.
• Gases containing SOx, H2S, silicone vapor and adhesives
must not enter the sensor. These components adversely affect
the performance of the sensor.
• Dust and oil should be filtered from the sample gas.
• Water vapor in contact with the sensor will damage the
sensor. Use a moisture trap or filter to remove any water
vapor in the sample.
2.5 Electronics and Signal Processing
The Model 3000ZA Trace Oxygen Analyzer uses an 8031
microcontroller with 32 kB of RAM and 128 kB of ROM to control all
signal processing, input/output, and display functions for the analyzer.
System power is supplied from a universal power supply module designed
to be compatible with any international power source. Figure 2-3 shows
the location of the power supply and the main electronic PC boards.