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Percent Oxygen Analyzer Maintenance 5
5-7
Teledyne Analytical Instruments
Table 5-1: Self Test Failure Codes
Power
0OK
1 5 V Failure
2 15 V Failure
3 Both Failed
Analog
0OK
1 DAC A (0–1 V Concentration)
2 DAC B (0–1 V Range ID)
3 Both Failed
Preamp
0OK
1 Zero too high
2 Amplifier output doesn't match test input
3 Both Failed
5.5 Major Internal Components
The Micro-Fuel cell is accessed by unlatching and swinging open the
front panel, as described earlier. Other internal components are accessed by
removing the rear panel and sliding out the entire chassis. See Figure 5-4,
below. The gas piping is illustrated in Figure 2-4, and the major electronic
components locations are shown in Figure 2-5, in chapter 2.
WARNINGS: See warnings on the title page of this manual.
The 3000PA contains the following major components:
• Analysis Section
Micro Fuel Cell (B-1 standard—others available)
Nylon Probe and Holder
Sample System
• Power Supply
• Microprocessor
• Displays
5 digit LED meter
2 line, 20 character, alphanumeric, VFD display
• RS-232 Communications Port.
See the drawings in the Drawings section in back of this manual
for details.