8508A
Service Manual
4-12
Fuse Replacement and Line-Voltage Selection
W
Caution
To avoid fire hazard, use only the fuse arrangements that
appear in the fuse specification Tables 4-1 and 4-2 below.
Additionally, the supply network must be fused at a maximum
of 16 A, and if the power cable plug is internally fused, a 5 A
fuse must be fitted in the power cable plug.
To avoid shock hazards, disconnect all line-power and input
terminal connections before attempting to access the fuse(s).
Line-Power Fuse F1 and Voltage Selection
The power-input and voltage-selection module on the rear of the Multimeter houses the
line-power fuse F1. See Figure 4-9. A fuse tray to the right of the module serves as a fuse
holder and a line-voltage-selection device. A small window on the fuse tray shows the
currently selected line voltage, 115 or 230. The fuse rating is a function of the selected
line voltage as shown in Table 4-1.
Use the following procedure to change the fuse or change the line power selection:
1.
Remove the fuse tray by placeing a small screwdriver blade under the tab on the fuse
tray and pulling the tray from the module.
2.
To change the voltage selection, rotate and position the fuse holder in the tray so the
desired line voltage shows in the fuse-tray window.
3.
As necessary, remove and replace the fuse with one that corresponds to the selected
line voltage. See Table 4-1.
4.
Slide the fuse tray back into the power-input and voltage-selection module, and
secure it by firmly pressing it into place.
adj019f.eps
Figure 4-9. Rear Panel – Power Input Fuse and line Power Locations
Table 4-1. Power Input Fuse 1
Power Input
Fuse F1
Fuse Action
Fuse Rating
IEC 127 (UL/CSA)
Fluke
Part No.
Manufacturer
& Type No.
115 VAC
TH
Time delay HBC
1.25 A (2 A) @ 250V
920204
Schurter
001.2505
230 VAC
TH
Time delay HBC
630 mA (1 A) @ 250V
920203
Schurter
001.2502
Summary of Contents for 8508A
Page 6: ...8508A Service Manual iv ...
Page 8: ...8508A Service Manual vi ...
Page 10: ...8508A Service Manual viii ...
Page 12: ...8508A Service Manual 1 2 ...
Page 32: ...8508A Service Manual 1 22 ...
Page 34: ...8508A Service Manual 2 2 ...
Page 40: ...8508A Service Manual 2 8 ...
Page 84: ...8508A Service Manual 3 44 ...
Page 88: ...8508A Service Manual 4 2 ...
Page 108: ...8508A Service Manual 5 2 ...
Page 120: ...8508A Service Manual 5 14 ...