B&K Precision 5491B - Manual - Manual (Page 14)

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2.6 Power up
2.6.1 Power Line Connection
Follow the procedure below to connect the multimeter to line power and turn on the instrument.
1. Check to make sure that the line voltage is in the correct range of 110 V or 220 V ± 10% (198 V to
242 V) and line frequency is in the range of 60 Hz or 50 Hz ± 5% (or 47.5 to 52.5 Hz) and that the
line voltage switch is in the correct position before connecting the power cord. To check, first look
at the label on the fuse compartment to verify if it is shown as “110” or “220”. If it is not switched to
the correct one, open up the fuse compartment and turn the grey fuse holder until it shows the
correct voltage label (110 or 220) on the outer part of the fuse compartment. Then, check to make
sure correct fuse value is used for the selected voltage operation.
CAUTION: Operating the instrument on an incorrect voltage may cause damage to the
instrument, possibly voiding the warranty.
2. Before plugging in the power cord, make sure that the front panel power switch is in the off position.
3. Connect the female end of the supplied power cord to the AC receptacle on the rear panel. Connect
the other end of the power cord to a grounded AC outlet.
WARNING: The power cord supplied with the multimeter contains a separate ground wire for use
with grounded outlets. When proper connections are made, instrument chassis is
connected to power line ground through the ground wire in the power cord. Failure to
use a grounded outlet may result in personal injury or death due to electric shock.
4. Turn on the instrument by pressing the front panel power switch and instrument is ready for
measuring.
2.6.2 Input Terminals
The input terminals are shown in Figure 2-5. The multimeter is protected against overloads up to the
limits as shown in table 2-1. Exceeding these limits may result in a hazard to both the multimeter and
operator.