Teledyne 3020M - Explosion proof paramagnetic oxygen analyzer - Manual (Page 56)

5 Maintenance Model 3020M
5-2
Teledyne Analytical Instruments
Figure 5-1: Major Internal Components
To swing open the cover panel, remove all screws.
5.3 Sensor Replacement
The Paramagnetic Sensor is maintenance free, and has a long life.
Should the sensor fail, contact the factory for service and replacement.
5.4 Fuse Replacement
The 3020M requires two 5 x 20 mm, 4 A, T type (Slow Blow) fuses.
The fuses are located inside the explosion proof housing on the Electrical
Connector Panel, as shown in Figure 5-2. To replace a fuse:
1. Disconnect the Unit from its power source.
2. Place a small screwdriver in the notch in the fuse holder cap,
push in, and rotate 1/4 turn. The cap will pop out a few
millimeters. Pull out the fuse holder cap and fuse, as shown in
Figure 5-3.
Preamp PCB
Main PCB
Display PCB
Sensor Gas Control Valves
Customer Interface Panel
(Electrical Connector Panel)
Door Subassembly
(Cross Section)
Box Subassembly
(Gas Connector Panel
not shown)
24V Sensor Power Supply
located behind Customer
Interface Board.