B&K Precision 5491B - Manual - Manual (Page 13)

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2.5 Rear Panel Summary
The rear panel of the multimeter is shown in Figure 2-4. This section includes important information that
should be reviewed before operating the instrument.
Figure 2-4 Rear Panel
1. USB Device Port
Connection port for USB remote control.
2. Grounding
Chassis Grounding terminal
3. Power-Line Fuse-Holder Assembly
The multimeter can be configured for line voltage of 110/220 V ± 10% AC at line frequency of 50/60
Hz ± 5%.
Power-line fuse is used for instrument protection. (220 V/500 mA or 110 V/1 A)
Note: Please use the same-type fuse. To verify and replace the fuse, remove the power
cable and pull out the fuse holder. To select between line voltage operations of 110 V
or 220 V, turn the grey colored fuse holder until the correct line voltage label is shown
on the outer window of the fuse holder. It should say “110” or “220” depending which
way you turn it.
4. RS232 Communication Port (Model 5491B only)
Connection port for remote control via RS232.
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