3B SCIENTIFIC PHYSICS 1017895 Folha de instruções - Página 2

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The demo multimeter conforms to safety regula-

tions for electrical measurement, control and la-

boratory equipment, as specified in DIN EN

61010-1, protection class 2 and to measuring ca-

tegory CAT II for up to 600 V. The nominal volt-

age between the phase conductors and the neu-

tral for voltage and current measurements (in cir-

cuits directly connected to mains electricity) must

not exceed 600 V in order to conform to CAT II.

The meter is intended for measurements within

its measuring ranges and in a measuring environ-

ment as described in detail in the course of this

manual. Safe operation of the multimeter is gua-

ranteed if it is solely used as specified. Safety can-

not be guaranteed, however, if the multimeter is

used incorrectly or handled without due care and

attention. In order to avoid serious injury due to

current or voltage shocks, the following safety in-

structions are to be observed at all times.

The multimeter may only be used by persons who

are able to recognise the risks of contact and take

due precautions to avoid them. Voltages in ex-

cess of 33 V AC (RMS) or 70 V DC are to be re-

garded as actively dangerous if the current,

charge or energy stored should exceed certain

values (see DIN EN 61010-1).



Carefully read the instruction manual before

using the multimeter and obey the instruc-

tions therein.



The multimeter may only be used in a dry,

dust-free environment with no risk of explo-

sions occurring.

The assumption needs to be made that unfore-

seen voltages may be present in the vincinity of

objects being measured (e.g. faulty equipment).



Before using the multimeter, check the hou-

sing and measuring leads for damage and if

there should be any malfunctions or visible

damage, the multimeter is not to be used.

Pay specific attention to the insulation for the

measuring sockets.



The multimeter may not be used to make

measurement on circuits which exhibit co-

rona discharge (high voltage).



Particular care is to be taken when making

measurements on high-frequency circuits

where dangerous voltages may arise due to

superimposition of components.



The authorised measuring range is not to be

exceeded. If measurements are made when

the magnitude of the variable is unknown, al-

ways select a large measuring range before

shifting down to lower ones.

2. Safety instructions



Make very sure that the voltage value be-

tween the measured contact and earth or be-

tween the ground socket and the measure-

ment socket does not exceed 600 V.



Before using the analogue multimeter to

check that a voltage source is not exhibiting

any actual voltage, check that the meter is

working properly by selecting the battery test

function.



When measuring current, make sure the

electricity is turned off before the analogue

multimeter is connected into the circuit.



When making measurements, always con-

nect the ground lead first. Disconnect the sig-

nal measurement lead before unplugging the

ground.



Turn off the multimeter before opening the

casing, disconnect the power to the circuit

and the measuring leads from the multimeter.

If measurements are made where there are any

risks of coming into contact with electricity, a sec-

ond person is to be informed.



The demo-multimeter should not be stored,

set up or operated within reach of children.



When the multimeter is used by teenagers,

trainees etc., a suitable person should super-

vise to ensure the equipment is used safely.



If measurements are to be made where volt-

ages exceed 33 V AC (RMS) or 70 V DC, be

especially careful and only use safety experi-

ment leads.

Measuring categories according to DIN EN

61010-1.

CAT I or unstipulated: Approved for measure-

ments in circuits which are not directly connected

to the low voltage mains grid (e.g. batteries).

CAT II: Approved for measurements in circuits

which are directly connected, by a mains lead

and plug for instance, to the low voltage mains

grid (e.g. household or office appliance and lab

equipment).

CAT III: Approved for measurements in circuits

which are part of a building's wiring installation

(e.g. stationary consumers, distribution terminals,

appliances connected directly to the distribution

box).

CAT IV: Approved for measurements in circuits

which are directly connected to the source of the

low voltage mains (e.g. electricity meters, main

service feed, primary excess voltage protection).