HP 41952A Operation Note page 8

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SAFETY
CONSIDERATIONS The HP 41952A/B Transmisslon/Reflection Test Sets conform to
the safety requiremcnts for IEC 348, and CSA 556B instruments,
and is 'shipped from the factory in a safe condition. This opera-
tion note contains information, CAUTIONS and WARNINGS which
must be followed by the user to ensure safe operation,
UNITS COVERED BY
THIS OPERATION
NOTE
Hewlett-Packard uses a two-part, nine character serial number
which is stamped on the serial number plate (see Figure 1-1)
attached to the inside of the carrying case. T h e first four digits
and a letter are the prefix and the last five digits are the suffix of
the serial number, The letter in the serial, number identifies the
country where the instrument was manufactured. T h e prefix is
same for all identical instruments, it changes only when a change
Is made t o the instrument. T h e suffix, however, i s assigned
sequentially and is different for each Instrument. This operation
note applies t o instruments with serial number prefixes listed
under Serial Numbers on the title page.
Units manufactured after this operation note was printed may
have a serial number prefix which is not listed on the title page.
An unlisted serial number prefix indicates that the instrument may
be different from those described in this operation note. Opera-
tion notes for new instruments may be accompanied by a yellow
Manual Supplement page, or have a different part number, This
supplement contains "Change Information" explaining h o w t o
adapt this operation note to newer instruments.
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Figure 1-1. Serial Number Plate
1-2