Maintenance 5; Replacing The Fuse; Standard Ac Version - Teledyne 3350 Operating Instructions Manual

Alarm Oxygen Monitor
Aside from normal cleaning, the Model 3350 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.
5.1
Remove Power to Unit before replacing any fuse.
The Model 3350 has two different configurations: Standard AC Version
and AC with Battery Backup Version. Both configurations have replaceable
fuses. When a fuse blows, check first to determine the cause, then replace the
fuse(s) using the following procedures, depending on which version is used.

5.1.1 Standard AC Version

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
2. The fuse receptacle is located in the power cord receptacle
Maintenance
Replacing the Fuses
the rear panel of the control unit in the O position. Remove the
control unit power cord from the receptacle.
assembly in the upper left-hand corner of the control unit, on the
front door. See Figure 5-1.
Figure 5-1: AC Fuse Replacement
Teledyne Analytical Instruments

Maintenance 5

FUSE
5-1