Cat I; Measurement Categories Cat; Proper Operating Conditions; Warranty And Repair - Hameg Instruments HM5510 Manuel

CAT I

The following remarks concern only the safety of the user.
Other aspects e.g. the maximum input voltage etc. are cove-
red in the Specifi cations section of this manual and are to be
observed as well.
This measuring instrument is destined for measurements in
circuits which are not connected in any way with the mains,
i.e. battery operated resp. galvanically isolated circuits. Direct
measurements (i.e. without galvanic isolation) in circuits of
measurement categories II, II, and IV are prohibited. Galvanic
isolation is ensured by an isolation transformer of Safety Class
II or a transducer such as a current probe of Safety Class II,
using any of these allows at least indirect measurements. In
any case the measurement category of the transducer must
be checked.

Measurement categories CAT

The measurement categories were created with respect to the
different kind of transients incurred in practice. Transients are
short, fast, and fast-rise changes of voltage or current, they
may be periodic or non-periodic. The amplitudes of transients
increase with decreasing distance from their source.
CAT IV: Measurements at the source of a low voltage supply,
e.g. at electricity meters.
CAT III: Measurements inside a building, e.g. at distribution
sites, power switches, permanently installed mains
outlets, permanently mounted motors etc.
CAT II: Measurements in circuits which are directly con-
nected with the low voltage supply, e.g. household
appliances, portable tools etc.
CAT I: Electronic instruments and circuits which contain
circuit breakers resp. fuses.
Overhead lines
CAT IV
Premises Permanently installed
In-house machinery, distribution sites,
installation power conductors, mains
outlets close to the CAT IV
installation
CAT III

Proper operating conditions

Operation in the following environments: industry, business
and living quarters, small industry. The instruments are
destined for operation in dry, clean environments. They must
not be operated in the presence of excessive dust, humidity, or
chemical vapors neither in case of danger of explosion.
The maximum permissible ambient temperature during ope-
ration is + 10 to + 40 degr. C. In storage or during transport the
temperature limits are: - 40 to + 70 degr. C. In case of exposure
to low temperature or if condensation is to be 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, suffi cient ventilation must be ensured. Operation
for extended periods of time require the horizontal or tilted
(handle) position.
Do not block the ventilation holes.
Nominal specifi cations are valid after 30 minutes warm-up at
23 degr. C. Specifi cations without tolerances are typical values
taken of average production units.
STOP

Warranty and repair

HAMEG instruments are subject to a strict quality control.
All instruments are burned in for 10 hrs prior to shipment. By
intermittent operation almost all early failures are detected.
After burn-in a thorough test of all functions and of quality is
run, all specifi cations and operating modes are checked.
In case of reclamations during the two years warranty period
please contact the dealer from whom you purchased your
HAMEG instrument. Customers from the Federal Republic of
Germany may directly contact HAMEG for warranty processing
in order to speed up the procedure.
Mains outlets for
household appliances,
portable tools, PC,
refrigerator etc.
I m p o r t a n t h i n t s
CAT II
Subject to change without notice
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