Acoustic Noise Emissions; Geräuschemission; Electrostatic Discharge Immunity Testing - Keysight Technologies 53147A Service Manual

Whenever it is likely that the protection has been impaired, the instrument must
be made inpoerative and be secured against any unintended operation.
If this instrument is to be energized via an autotransformer (for voltage reduction),
make sure the common terminal is connected to the earthed pole terminal
(neutral) of the power source.
Instructions for adjustments while covers are removed and for servicing are for use
by trained personnel only. To avoid dangerous electric shock, do not perform such
ajdustments or servicing unless qualified to do so.
For continued protection against fire, replace the line fuse(s) with fuses of the
same current rating and type (for example, normal blow, time delay). Do not use
repaired fuses or short-circuited fuseholders.

Acoustic Noise Emissions

LpA<47 dB at operator position, at normal operation, tested per EN 27779. All
data are the results from type test.
Geräuschemission
LpA<47 dB am Arbeits
platz, normaler Betrieb, geprüft nach EN 27779.
Die Angagen beruhen auf Ergebnissen von Typenprüfungen.

Electrostatic Discharge Immunity Testing

When the product is tested with 8kV AD, 4kV CD and 4kV ID according to
IEC801-2, a system error may occur that may affect measurement data made
during these disturbances. After these occurrences, the system self-recovers
without user intervention.
Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide 7