Teledyne OT-3 - Manual (Page 39)

Trace Oxygen Analyzer Maintenance
Teledyne Analytical Instruments 31
Maintenance
Aside from normal cleaning and checking for leaks at the gas
connections, the Model OT-3 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 Replacing the Fuse
CAUTION: ON AC UNITS, REMOVE THE POWER TO THE UNIT
BEFORE REPLACING THE FUSE.
When a fuse blows, check first to determine the cause, then replace
the fuse using the following procedure:
AC Units
1. On AC units, disconnect the power. 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.
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. There are two fuses in use and are
visible in the clip.
4. Remove the bad fuse and replace it with a 5x20mm 0.5 A,
250 VAC, IEC time lag (T) fuse (P/N F1130).
5. Replace the fuse holder into its receptacle, pushing in firmly
until it clicks.