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Operating Instructions
General Information
Safety
This oscilloscope is easy to operate. The logical arrange¬
ment of the controls allows anyone to become familiar with
the operation of the instrument after a short time, however,
experienced users are also advised to read through these
instructions so that all functions are understood.
Immediately after unpacking, the instrument should be
checked for mechanical damage and loose parts in the in¬
terior. If there is transport damage, the supplier must be in¬
formed immediately. The instrument must then not be put
into operation.
Check that the instrument is set to the correct mains/line
voltage. If not, refer to instructions on page M2.
Use of tilt handle
To view the screen from the best angle, there are three dif¬
ferent positions (C, D, E)forsetting up the instrument. If the
instrument is set down on the floor after being carried, the
handle remains automatically in the upright carrying posi¬
tion (A).
In order to place the instrument onto a horizontal surface,
the handle should be turned to the upper side of the oscillo¬
scope (C). For the D position (10° inclination), the handle
should be turned in the opposite direction out of the carry¬
ing position until it locks in place automatically underneath
the instrument. For the E position (20° inclination), the
handle should be pulled to release it from the D position and
swing backwards until it locks once more.
The handle may also be set to a position for horizontal carry¬
ing by turning it to the upper side to lock in the B position. At
the same time, the instrument must be moved upwards,
because otherwise the handle will jump back.
This instrument has been designed and tested in accor¬
dance with
lEC Publication 348, Safety Requirements for
Eiectronic Measuring Apparatus,
and has left the factory
in a safe condition. The present instruction manual contains
important information and warnings which have to be fol¬
lowed by the user to ensure safe operation and to retain the
oscilloscope in safe condition. The case, chassis and all
measuring terminals are connected to the protective earth
contact of the appliance inlet. The instrument operates ac¬
cording to Safety C/ass/(three-conductor power cord with
protective earthing conductor and a plug with earthing con¬
tact). The mains/line plug shall only be inserted in a socket
outlet provided with a protective earth contact. The protec¬
tive action must not be negated by the use of an extension
cord without a protective conductor.
Warningl Any interruption of the protective conductor
inside or outside the instrument or disconnection of the
protective earth terminai is iikely to make the instru¬
ment dangerous. Intentional interruption of the protec¬
tive earth connection is prohibited. The mains/line piug
should be inserted before connections are made to
measuring circuits.
The grounded accessible metal parts (case, sockets, jacks)
and the mains/line supply contacts (line, neutral) of the in¬
strument have been tested against insulation breakdown
with
2000Vr.m.s. (50Hz).
Under certain conditions, 50 Hz or 60 Hz hum voltages can
occur in the measuring circuit due to the interconnection
with other mains/line powered equipment or instruments.
This can be avoided by using an isolation transformer
(Safety Class II). When displaying waveforms where the
"low-level" side of the signal is at a high potential, even
with the use of a protective isolation transformer, it should
be noted that this potential is connected to the oscillo¬
scope's case and other accessible metal parts. High volt¬
ages are dangerous. In this case, special safety precautions
are to be taken, which must be supervised by qualified per¬
sonnel if the voltage is higher than 42 V.
Most cathode-ray tubes develop X-rays. However,
the
dose equivalent rate falls far below the maximum per¬
missible value of 36pA/kg (O.SmR/h).
Whenever it is likely that protection has been impaired, the
instrument shall be made inoperative and be secured
against any unintended operation. The protection is likely to
be impaired if, for example, the instrument
- shows visible damage,
- fails to perform the intended measurements,
- has been subjected to prolonged storage under un¬
favourable conditions (e.g. in the open or in moist envi¬
ronments),
- has been subject to severe transport stress (e.g. in poor
packaging).
Subject to change without notice
Ml
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