Teledyne 2000A-EU - General purpose thermal conductivity analyzer - Manual (Page 70)

5 Maintenance Model 2000A-EU
5-2 Teledyne Analytical Instruments
Preamp
0 OK
1 Zero too high
2 Amplifier output doesn't match test input
3 Both Failed
Cell
0 OK
1 Failed (open filament, short to ground, no
power.)
2 Unbalance (deterioration of filaments, blocked
tube)
5.3 VFD Display
NOTE: Vaccum Fluorescent Display is used. It does not need
contrast adjustment.
If you cannot read anything on the VFD, especially after first powering
up, check thead VFD cable is not loose.
5.4 Fuse Replacement
1. Place small screwdriver in notch, and pry cover off, as shown in
Figure 5-1.
Figure 5-1: Removing Fuse Block from Housing
2. To change between American and European fuses, remove the
single retaining screw, flip Fuse Block over 180 degrees, and
replace screw.