Teledyne 3190 Replacing the Fuse, Trace Oxygen Analyzer Maintenance, Overvoltage Category

Trace Oxygen Analyzer Maintenance 5

Overvoltage Category II

Maintenance

Aside from normal cleaning and checking for leaks, the Model 3190 should not require any maintenance beyond replacement of expended Micro- Fuel Cells, and perhaps a blown fuse. Routine maintenance includes occa- sional recalibration, as described in chapter 4, Operation.

5.1Replacing the Fuse

5.1.1 AC Powered Units

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.

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 fuse holder will slide out. The fuse in use is visible in the clip. To

Teledyne Analytical Instruments 5-1