Areas Of Use Of The Instrument; Environmental Conditions; Maintenance; Warranty And Repair - Hameg HM400 Manual

mains if the measuring object is operated via an isolation transformer
of safety class II. Indirect measurements on the mains are also possible
with special probes, e.g. current probes, which fulfill the requirements
of the safety class II. With such measurements the measurement ca-
tegory specified by the manufacturer for the probe has to be observed.
Measurement categories
The measurement categories relate to transients on the mains. Such
transients are short but very fast (short rise time) voltage or current
excursions which may be periodic or not. The amplitude of possible
transients increases the shorter the distance to the source of the
mains installation is.
Measurement category IV: Measurements directly at the source of the
mains installation, e.g. at the electricity meters.
Measurement category III: Measurements within the mains installa-
tions, e.g. at distribution points, power switches, wall outlets, perma-
nently mounted motors etc.
Measurement category II: Measurements at circuits which are
directly connected to the mains, e.g. household appliances, portable
tools etc.
Measurement category I: Electronic apparatus and fused circuits
within such apparatus.
1.7

Areas of use of the instrument

The oscilloscope is destined for use in the following areas: industrial,
housing, business, workshops.
1.8

Environmental conditions.

The permissible operating temperature range is +5 to +40 °C. During
storage or transport the temperature range is –20 to +70 °C. Conden-
sation of water during transport or storage requires a 2 hour drying
period before operation. The oscilloscope is destined for use in dry,
clean rooms. It must not be operated if there is severe dust or if the
humidity is excessive nor if there is danger of explosion or aggressive
chemical reaction.
The orientation during operation may be any. Sufficient air circulation
has to be provided, however. Continuous operation requires a horizontal
or tilted (handle) position.
Do not cover the ventilation holes!
All nominal specifications and tolerances are valid after a warm-up time
of at least 30 min. and at an ambient temperature of + 23 degr. C. Spe-
cifications without a tolerance given are those of a typical instrument.
1.9

Maintenance

Clean the outer case using a dust brush or a soft, lint-free
dust cloth at regular intervals.
Before cleaning please make sure the instrument is swit-
ched 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.
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 Warranty and repair

HAMEG instruments are subjected to a strict quality control. Prior to
leaving the factory, each instrument is burnt-in for 10 hours. By inter-
mittent operation during this period almost all defects are detected.
Following the burn-in, each instrument is tested for function and quality,
the specifications are checked in all operating modes; the test gear is
calibrated to national standards.
The warranty standards applicable are those of the country in which the
instrument was sold. Reclamations should be directed to the dealer.
Only valid in EU countries
In order to speed reclamations customers in EU countries may also
contact HAMEG directly. Also, after the warranty expired, the HAMEG
service will be at your disposal for any repairs.
Return material authorization (RMA):
Prior to returning an instrument to HAMEG ask for a RMA number
either by internet (http://www.hameg.com) or fax. If you do not have
an original shipping carton, you may obtain one by calling the HAMEG
service dept (phone: +49 (0) 6182 800 500, fax: +49 (0) 6182 800 501) or
by sending an e-mail to service@hameg.com.

1.11 Line voltage

The instrument may be operated with any voltage between 105 V to 253 V,
50/60 Hz, hence there is no line voltage selector.
The line fuses is accessible from the outside. The mains connector and
the fuse holder are one unit. The fuses can only be exchanged (if the fuse
holder was not damaged) after the mains cable has been detached. In
order to remove the fuses, use a small screw driver (appr. 2 mm) and
push it into the two slanted slots at both sides of the fuse holder, this
will release it, it will pop out by spring force. The fuses may then be
exchanged. Please take care not to bend the contact springs. Inserting
the fuse holder requires that the protruding notch points to the mains
connector. The fuse holder has to be pushed in against the spring force
until both latches catch it. It is prohibited to use „repaired" fuses or to
short -circuit the fuse. Any damages incurred by such manipulations
will void the warranty.
Type of fuse
Size 5 x 20 mm
250 V AC, C
IEC 127, p. III, DIN 41 662 (also DIN 41 571, p. 3)
Slow blow T 0.8 A.
I m p o r t a n t h i n t s
Subject to change without notice
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