3B SCIENTIFIC PHYSICS 1018832 Instructieblad - Pagina 2

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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 hous-

ing 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.



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 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 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 electric-

ity, a second person is to be informed.



The 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.



When using the measuring leads always hold

them with your fingers behind the finger

guard.



To avoid false readings, which may result in

electric shocks or injuries, always replace the

battery as soon as the flat battery indicator

+ -

(

) is displayed.



Never use the multimeter when its casing is

open.

Measuring categories according to DIN EN

61010-1.



CAT I or unstipulated: Approved for measure-

ments in circuits which are not directly con-

nected to the low voltage mains grid (e.g. bat-

teries).



CAT II: Approved for measurements in cir-

cuits 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 cir-

cuits which are part of a building's wiring in-

stallation (e.g. stationary consumers, distri-

bution terminals, appliances connected di-

rectly to the distribution box).



CAT IV: Approved for measurements in cir-

cuits which are directly connected to the

source of the low voltage mains (e.g. electric-

ity meters, main service feed, primary excess

voltage protection).

2. Equipment supplied

1 Digital multimeter

1 Pair of measuring probes

1 Adapter for transistor test

1 Battery

1 Instruction manual

3. Symbol legend

Hazard, read instruction sheet

Dangerous voltages

DC voltage

DC current

AC voltage

AC current

Diode and continuity test

hFE

Current amplifying factor of a transistor