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In any of the following cases the instrument must be taken out
of service and locked away from unauthorized use:
–
Visible damages
–
Damage to the power cord
–
Damage to the fuse holder
–
Loose parts
–
No operation
–
After longterm storage in an inappropriate environment,
e.g. open air or high humidity.
–
Excessive transport stress
1.7
Operating conditions
The instruments are destined for use in dry clean rooms. Ope-
ration in an environment with high dust content, high humidity,
danger of explosion or chemical vapors is prohibited. Operating
temperature is +5 °C ... +40 °C. Storage or transport limits are
–20 °C ... +70 °C. In case of condensation two hours are to be
allowed for drying prior to operation.
For safety reasons operation is only allowed from 3 terminal
connectors with a safety ground connection or via isolation
transformers of class 2. The instrument may be used in any
position, however, sufficient ventilation must be assured as
convection cooling is used. For continuous operation prefer a
horizontal or slightly upward position using the feet.
Do not cover either the holes of the case nor the
cooling fins.
Nominal specs are valid after a warm-up period of min. 30 min.
in the interval of +23 °C. Values without a tolerance are typical
of an average production instrument.
1.8
Warranty and Repair
Our instruments are subject to strict quality controls. Prior to
leaving the manufacturing site, each instrument undergoes 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 nation-
al standards. The statutory warranty provisions shall be gov-
erned by the laws of the country in which the product was
purchased. In case of any complaints, 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 discon-
nected from the AC supply network. Otherwise,
personnel will be exposed to the risk of an electric
shock.
Any adjustments, replacements of parts, maintenance and re-
pair 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 measure-
ment, functional test). This helps ensure the continued safety
of the product.
1.9
Maintenance
Before cleaning please make sure the instrument
is switched off and disconnected from all power
supplies.
Clean the outer case using a dust brush or a soft, lint-free dust
cloth at regular intervals.
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 lac-
quered surfaces.
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.
1.10 Line voltage selector
The instrument is destin-
ed for operation on 115
or 230 V mains, 50/60 Hz.
The proper line voltage
is selected with the
line voltage selector. It is
necessary to change the
fuse observing the proper
values printed on the back
panel.
1.11 Change of fuse
The mains fuse
is accessible on the back panel. A change of
the fuse is only allowed after the instrument was disconnected
from the line and the power cord removed. Fuse holder and
power cord must not show any sign of damage. Use a screw
driver to loosen the fuse holder screw counterclockwise while
pressing the top of the fuse holder down. The top holding the
fuse will then come off. Exchange the defective fuse against
a correct new one. Any „repair" of a defective fuse or brid-
ging is dangerous and hence prohibited. Any damages to the
instrument incurred by such manipulations are not covered by
the warranty.
Type of fuse:
5 x 20 mm; 250V~, C;
IEC 127/III; DIN 41662
(DIN 41571/3).
Value
115 V: 200 mA slow blow
230 V: 100 mA slow blow
I m p o r t a n t h i n t s
Subject to change without notice
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