B&K Precision 830C - Manual - Manual (Page 6)

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Category II (CAT. II) 50 V, Pollution Degree
2 environment.
 Use the meter only as specified in this
manual. Otherwise, the protection provided
by the meter may be impaired.
 The power for the meter is supplied with a
single standard 9V battery. It can also
operate from AC line using a 12V AC to DC
adaptor. If a power adaptor is selected,
please be sure to use one with correct AC
line input voltage and fulfills the safety
requirements of a relevant IEC standard.
 Use only battery specified by the meter. See
“ Installing Battery ” section for details.