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Operating conditions
Maintenance
The instrument has been designed for indoor use.
The permissible ambient temperature range during opera¬
tion is -I-10°C... -t-40°C. It may occasionally be subjected to
temperatures between -l-10°Cand -10°C without degrad¬
ing its safety. The permissible ambient temperature range
for storage or transportation is -40°C ... -I-70°C.
The maximum operating altitude is up to 2200 m (non¬
operating 15000 m). The maximum relative humidity is up
to 80%.
If condensed water exists in the instrument it should be
acclimatized before switching on. In some cases (e.g.
extremely cold oscilloscope) two hours should be allowed
before the instrument is put into operation. The instrument
should be kept in a clean and dry room and must not be
operated in explosive, corrosive, dusty, or moist environ¬
ments. The oscilloscope can be operated in any position,
but the convection cooling must not be impaired.
The ven¬
tilation holes may not be covered.
For continuous opera¬
tion the instrument should be used in the horizontal posi¬
tion, preferably tilted upwards, resting on the tilt handle.
The specifications stating tolerances are only valid if
the instrument has warmed up for 30 minutes at an
ambient temperature between -h15C°and +30C°. Val¬
ues not stating tolerances are typical for an average
instrument.
Guarantee
Each instrument runs through a quality test with 10 hour
burn-in before leaving the production. Practically every early
failure is detected in intermittent operation by this method.
However, it is possible that a component fails only after a
lengthy operating period. Therefore a
functional guaran¬
tee of 2 years
is given for all units. The condition for this is
that no modifications have been made in the instrument. In
the case of shipments by post, rail or carrier it is recom¬
mended that the original packing is carefully preserved.
Transport damages and damage due to gross negligence
are not covered by the guarantee.
In the case of a complaint, a label should be attached to the
housing of the instrument which describes briefly the faults
observed. If at the same time the name and telephone
number (dialing code and telephone or direct number or
department designation) is stated for possible queries, this
helps towards speeding up the processing of guarantee
claims.
Various important properties of the oscilloscope should be
carefully checked at certain intervals. Only in this way is it
largely certain that all signals are displayed with the accu¬
racy on which the technical data are based. The test
methods described in the test plan of this manual can be
performed without great expenditure on measuring instru¬
ments. However, purchase of the new HAM EG scope test¬
er HZ 60, which despite its low price is highly suitable for
tasks of this type, is very much recommended.
The exterior of the oscilloscope should be cleaned regularly
with a dusting brush. Dirt which is difficult to remove on the
casing and handle, the plastic and aluminium parts, can be
removed with a moistened cloth (99% water -Fl % mild
detergent). Spirit or washing benzine (petroleum ether) can
be used to remove greasy dirt. The screen may be cleaned
with water or washing benzine (but not with spirit (alcohol)
or solvents), it must then be wiped with a dry clean lint-free
cloth. Under no circumstances may the cleaning fluid get
into the instrument. The use of other cleaning agents can
attack the plastic and paint surfaces.
Switching over the mains/line voltage
The instrument is set for 220 V line voltage on delivery. It
can be switched over to other voltages at the fuse holder
combined with the 3-pole appliance inlet at the rear of the
instrument. Firstly the fuse holder printed with the voltage
values is removed using a small screw driver and - if
required - provided with another fuse. Refer to the table
below for the prescribed value of the fuse. Then replace the
fuse holder so that the impressed white triangle points to
the desired voltage. Here pay attention that the cover plate
is also correctly engaged. The use of repaired fuses or short
circuiting the fuse holder is not allowed. Damage arising
because of this is not covered by the guarantee.
220
R
\
ir>
N>
CM
1-
o
0
0
1
oil
V-
y
Fuse type: Size 5 x 20 mm; 250 V~, C;
lEC 127, Sheet III; DIN
sheet 3).
Cutoff: time lag (T).
Line voltage
110V~±10%
125V~±10%
220V~±10%
240V~±10%
41 662 (possibly DIN 41 571
Fuse rating
T0.63 A
T0.63 A
T0.315A
T0.315A
M2
Subject to change without notice
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