Warranty And Repair; Maintenance; Line Fuse; 1.10 Power Switch - Hameg HM8123 Benutzerhandbuch

the temperature limits are: –20 °C to +70 °C. In case of ex-
posure to low temperature or if condensation is suspected,
the instrument must be left to stabilize for at least 2 hrs
prior to operation.
In principle the instrument may be used in any position,
however sufficient ventilation must be ensured. Operation
for extended periods of time requires the horizontal or til-
ted (handle) position. Nominal specifications are valid af-
ter 30 minutes warm-up at 23 °C. Specifications without
tolerances are typical values taken of average production
units.
1.7

Warranty and Repair

Our instruments are subject to strict quality controls. Prior
to leaving the manufacturing site, each instrument under-
goes a 10-hour burn-in test. This is followed by extensive
functional quality testing to examine all operating modes
and to guarantee compliance with the specified technical
data. The testing is performed with testing equipment that
is calibrated to national standards. The statutory warranty
provisions shall be governed by the laws of the country
in which the product was purchased. In case of any com-
plaints, please contact your supplier.
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.
Any adjustments, replacements of parts, maintenance and
repair may be carried out only by authorized technical per-
sonnel. Only original parts may be used for replacing parts
relevant to safety (e.g. power switches, power transform-
ers, fuses). A safety test must always be performed after
parts relevant to safety have been replaced (visual inspec-
tion, PE conductor test, insulation resistance measurement,
leakage current measurement, functional test). This helps
ensure the continued safety of the product.
1.8

Maintenance

Clean the outer case using a dust brush or a soft, lint-free dust
cloth at regular intervals.
The display can be cleaned using water or a glass cleaner
(but not with alcohol or other cleaning agents). Thereafter
wipe the surfaces with a dry cloth. No fluid may enter the
instrument. Do not use other cleaning agents as they may
adversely affect the labels, plastic or lacquered surfaces.
Before cleaning please make sure the instrument is switched off
and disconnected from all power supplies.
No part of the instrument should be cleaned by the use of
cleaning agents (as f.e. alcohol) as they may adversely affect the
labeling, the plastic or lacquered surfaces.
1.9

Line fuse

The instrument has 2 internal line fuses: T 0.8 A. In case of
a blown fuse the instrument has to be sent in for repair. A
change of the line fuse by the customer is not permitted.

1.10 Power switch

The instrument has a wide range power supply from 105
to 253 V, 50 or 60 Hz ±10 %. There is hence no line voltage
selector.
Important hints
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