Subject to change without notice
17
I m p o r t a n t h i n t s
In case of any complaints, please contact your
supplier.
Any adjustments, replacements of parts, main-
tenance and repair may be carried out only by
authorized technical personnel. Only original
parts may be used for replacing parts relevant to
safety (e.g. power switches, power transformers,
fuses). A safety test must always be performed
after parts relevant to safety have been replaced
(visual inspection, PE conductor test, insulation
resistance measurement, leakage current mea-
surement, functional test). This helps ensure the
continued safety of the product.
Maintenance
The most important characteristics of the instru-
ments should be periodically checked according to
the instructions provided in the sections “Opera-
tional check and “Alignment procedcure. To obtain
the normal operating temperature, the mainframe
with inserted module should be turned on at least
60 minutes before starting the test. The specified
alignment procedure should be strictly observed.
When removing the case detach mains/line cord
and any other connected cables from case of the
mainframe HM8001-2. Remove both screws on
rear panel and, holding case firmly in place, pull
chassis forward out of case. When later replacing
the case, care should be taken to ensure that
it properly fits under the edges of the front and
rear frames. After removal of the two screws at
the rear of the module, both chassis covers can
be lifted. When reclosing the module, care should
be taken that the guides engage correctly with the
front chassis.
Operation of the module
Provided that all hints given in the operating
instructions of the HM8001-2 Mainframe were
followed especially for the selection of the cor-
rect mains voltage start of operation consists
The
product may only be opened by
authorized and qualified personnel.
Prior to working on the product or
before the product is opened, it must
be disconnected from the AC supply
network. Otherwise, personnel will
be exposed to the risk of an electric
shock.
practically of inserting the module into the right
or left opening of the mainframe. The following
pre-cautions should be observed:
Before exchanging the module, the mainframe
must be switched off. A small circle (o) is now
revealed on the red power button in the front
centre of the mainframe.
If the BNC sockets at the rear panel of the
HM8001-2 unit were in use before, the BNC cables
should be disconnected from the basic unit for
safety reasons. Slide in the new module until the
end position is reached.
Before being locked in place, the cabinet of the
instrument is not connected to the protective earth
terminal (banana plug above the mainframe mul-
tipoint connector). In this case, no test signal must
be applied to the input terminals of the module.
Generally, the HM8001-2 set must be turned on
and in full operating condition, before applying any
test signal. If a failure of the measuring equipment
is detected, no further measurements should
be performed. Before switching off the unit or
exchanging a module, the instrument must be
disconnected from the test circuit.
