Teledyne 3300PA operating instructions Replacing the Fuse, Percent Oxygen Analyzer Maintenance

Percent Oxygen Analyzer Maintenance 5

Overvoltage

Category II

Maintenance

Aside from normal cleaning and checking for leaks at the gas connections, the Model 3300PA should not require any maintenance beyond replacement of expended Micro-Fuel Cells, and perhaps a blown fuse. Routine maintenance includes occasional recalibration, as described in chapter 4, Operation.

5.1Replacing the Fuse

Remove Power to Unit before replacing the fuse.

When a fuse blows, check first to determine the cause, then replace the fuse using the following procedure:

1.Disconnect the AC power and place the power switch located on the rear panel in the O position. Remove the power cord from the receptacle.

2.The fuse receptacle is located in the power cord receptacle assembly in the upper left-hand corner of the rear panel. See Figure 5-1.

Fuse

Figure 5-1: AC Fuse Replacement

3.Insert a small flat-blade screwdriver into the slot in the receptacle wall nearest the fuse and gently pry open the fuse receptacle. The

Teledyne Analytical Instruments 5-1