User guide

Percent Paramagnetic Oxygen Analyzer Maintenance 5
5-1
Teledyne Analytical Instruments
Maintenance
5.1 Routine Maintenance
Aside from normal cleaning and checking for leaks at the gas connec-
tions, routine maintenance is limited to replacing Paramagnetic Sensor and
fuses, and recalibration. For recalibration, see Section 4.4 The Zero and
Span Functions.
WARNING: SEE WARNINGS ON TITLE PAGE OF THIS MANUAL.
5.2 Major Internal Components
All internal components are accessed by unbolting and swinging open
the front cover, as described earlier. The major internal component locations
are shown in Figure 5-1, and the fuse receptacle is shown in Figure 5-2.
The 3020M contains the following major internal components:
• Paramagnetic Sensor
• Paramagnetic Sensor 24Vdc Power Supply
• Customer Interface PCB (Power Supply on bottom surface)
• Preamp PCB (Contains Microprocessor)
• Front Panel PCB (Contains Displays)
5 digit LED meter
2 line, 20 character, alphanumeric, VFD display
• Solenoid Operated Gas Control Valves (–C option only).