Maintenance; Operation Of The Module - Hameg Instruments HM 8021-4 Manuel

representative or employee of, which is not
contained in thiss warranty will be binding upon
Hameg, unless made in writing and executed by
an authorized Hameg employee. Hameg makes
no other warranty of any kind whatsoever,
expressed or implied, and all implied warranties
of merchantibility and fitness for a particular use
which exceed the aforestated obligation are
hereby disclaimed by HAMEG be liable to buyer,
in contract or in tort, for any special, indirect,
incidental or consequential damages, espresses,
losses or delays however caused.
In case of any complaint, attach a tag to the
instrument with a description of the fault observed.
Please supply name and department, address
and telephone number to ensure rapid service.
The instrument should be returned in its original
packaging for maximum protection. We regret
that transportation damage due to poor packaging
is not covered by this warranty.

Maintenance

The most important characteristics of the
instruments should be periodically checked
according th the instructions provided in the
sections "Operational 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 HM 8001-2. 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.
Subject to change without notice
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 HM 80012-2 Mainframe were
followed especially for the selection of the correct
mains voltage start of operation consists
practically of inserting the module into the right or
left opening of the mainframe. The following
precautions 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
HM 8001-2 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
multipoint connector). In this case, no test signal
must be applied to the input terminals of the
module.
Generally, the HM 8001-2 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.
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