Teledyne 3190Z - Zirconium oxide trace oxygen analyzer - Manual (Page 32)

Maintenance Model 3190Z
Teledyne Analytical Instruments 24
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 open the spare fuse compartment, push on one end until it
slides out.
4. Remove the bad fuse and replace it with a 5
×20 mm 0.5 A,
250 VAC, IEC, time lag (T) fuse (P/N F1128) for AC units.
5. Replace the fuse holder into its receptacle, pushing in firmly
until it clicks.
5.1.2 DC Powered Units
In units with DC power, the fuse is located on the rear panel above
the ON/OFF switch.
1. Open the fuse holder by unscrewing and removing the cap
marked FUSE.
2. The fuse is located inside the receptacle, not inside the cap. Both
terminals are on the same end of the fuse. Pull straight out
without twisting to remove the old fuse from the receptacle, and
replace it with a 0.5 A, 125 VDC, very quick acting (FF)
Microfuse (P/N F51).
3. Replace the cap by screwing it back into the receptacle.
5.2 Sensor Installation or Replacement
5.2.1 When to Replace a Sensor
The sensors used in this product will typically last five years or
longer in service. Typically, the sensors will fail either high or
low. Inaccurate or erratic readings are a sign that one of the
sensors may have failed. In most cases, we recommend the
entire unit be returned to an authorized Teledyne Service Center
for sensor replacement.