During Use; Opening The Instrument (Outside Explosive Atmosphere); Protection Devices - Metrix MX 57 EX Manual De Instrucciones

X02137A00 - Ed. 1 - 12/01

1.1.3. During use

∗
Never exceed the protective limiting values given in the specifications, in particular
those concerning intrinsic safety. Use the instrument exclusively on an intrinsically
safe circuit.
∗
When the multimeter is linked to measurement circuits, do not touch unused
terminals.
∗
When the scale of the value to be measured is unknown, check that the scale
initially set on the multimeter is the highest possible or, wherever possible, choose
the autoranging mode.
∗
Before changing functions, disconnect the test leads from the circuit under test.
∗
When performing current measurements, never change of range, do not connect or
disconnect leads without first isolating the current. If you do, there is a risk of
generating surge currents which can blow the fuse or damage the instrument.
∗
Never perform resistance measurements on live circuits.
1.1.4. Symbols

1.1.5. Opening the instrument (outside explosive atmosphere)

∗
Before opening the instrument, always disconnect from all sources of electric
current and make sure not to be loaded with static electricity, which may destroy
internal components.
∗
Fuse must be replaced with fuse of the same rating and type.
∗ Any adjustment, maintenance or repair work carried out on the multimeter should
be carried out only by appropriately qualified personnel, after having taken into
account the instructions in this present manual. A "qualified person" is one who
is familiar with the installation, construction and operation of the equipment and
the hazards involved.
This qualified person must be familiar with equipment for explosive atmospheres
and be trained in the general rules for intrinsic safety.
∗
When the instrument is open, for maintenance purposes for example, remember
that some internal capacitors can retain a dangerous potential even after the
instrument is powered down.
∗
If any faults or abnormalities are observed, take the instrument out of service and
ensure that it cannot be used until it has been checked out.
∗
It is recommended to remove the battery from the instrument if not used.
1.2.

Protection devices

ASYC II series instruments are fitted with various protection devices :
∗
One intrincally safe fuse provides protection during measurements of intensity type.
∗
A special intrinsic safety case ensures IP 67 sealing.
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W arning : Refer to the user's m anual.
Da ng e r, h ig h v oltage : R isk of elec tric sh oc k E arth term ina l
Intrincally safe portable digital multimeter
Chapter II