Teledyne 3290 - OEM percent oxygen analyzer - Manual (Page 39)

Percent Oxygen Analyzer Maintenance
Teledyne Analytical Instruments 29
Maintenance
Aside from normal cleaning and checking for leaks at the gas
connections, the Model 3290 should not require any maintenance
beyond replacement of expended sensors, and perhaps a blown fuse.
Routine maintenance includes occasional recalibration, as described in
Chapter 4, Operation.
5.1 Replacing 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