English - Hameg Instruments HM8010 Manuel

General information
General information
regarding the CE marking
HAMEG instruments fulfill the regulations of the
EMC directive. The conformity test made by HAMEG
is based on the actual generic and pro-duct
standards. In cases where different limit values are
applicable, HAMEG applies the strictest standard.
For emission the limits for residential, commercial
and light industry are applied. Regarding the
immunity (susceptibility) the limits for industrial
environment have been used.
The measuring and data lines of the instrument
have much influence on emission and immunity
and therefore on meeting the acceptance limits.
For different applications the lines and/or cables
used may be different. For measurement operation
the following hints and conditions regarding
emission and immunity should be observed:
1. Data cables
For the connection between instruments resp. their
interfaces and external devices, (computer, printer
etc.) sufficiently screened cables must be used.
Maximum cable length of data lines must not
exceed 3 m. The manual may specify shorter
lengths. If several interface connectors are
provided only one of them may be used at any time.
Basically interconnections must have a double
screening. For IEEE-bus purposes the double
screened cables HZ72S and HZ72L from HAMEG
are suitable.
2. Signal cables
Basically test leads for signal interconnection
between test point and instrument should be as
short as possible. Without instruction in the manual
for a shorter length, signal lines must be less than
3 meters long.
Signal lines must be screened (coaxial cable -
RG58/U). A proper ground connection is required.
In combination with signal generators double
screened cables (RG223/U, RG214/U) must be
used.
3. Influence on measuring instruments.
In the presence of strong high frequency electric
or magnetic fields, even with careful setup of the
measuring equipment an influence can not be
excluded.
18
Subject to change without notice
This will not cause damage or put the instrument
out of operation. Small deviations of the mea-
suring value (reading) exceeding the instru-ment's
specifications may result from such conditions in
some cases.
HAMEG GmbH