8
O R I G I N A L I N S T R U C T I O N S
GB
Current measurement
Depending on the expected current, connect the test leads to the
mA and COM jacks or the 20A and COM jacks. Select the appropri-
ate measuring range using the knob. The maximum current fl owing
through the mA jack can be 200 mA. If the current exceeds 200 mA,
connect the lead to the 20A jack. The maximum current measured
in the 20 A jack can be 20 A and is not protected by any fuse.
Therefore, the measurement time of currents higher than 2 A must
not exceed 15 seconds, after which a break of at least 15 minutes
must be taken before the next measurement. The mA socket can
be loaded with a maximum current of 200 mA.
It is forbidden to
exceed the maximum values of currents and voltages for a giv-
en jack.
The test leads must be connected in series to the tested
electrical circuit. Select the range and type of measured current by
means of a switch and read the measurement result. Start by se-
lecting the maximum measuring range. The measuring range can
be changed in order to obtain more accurate measurement results.
Resistance measurement
Connect the test leads to the jacks marked “VΩ” and “COM” and
set the range switch to the resistance measurement position. Touch
the probes to the terminals of the measured element and read
the measurement result. In order to obtain more accurate meas-
urement results, change the measuring range if necessary.
It is
absolutely forbidden to measure the resistance of elements
through which electric current is fl owing.
For measurements
greater than 1 MΩ, the measurement may take a few seconds be-
fore the readout becomes stable, which is the normal response for
high resistance measurements.
Before touching the probes to the terminals of the workpiece, an
overload symbol is shown on the display.
Capacitance measurement
Connect the test leads to the jacks marked “mA” and “COM”, set
the range switch to the capacitance measurement position. Make
sure that the capacitor has been discharged before the measure-
ment.
Never measure the capacitance of a charged capacitor
as this can damage the meter and cause electric shock.
When
measuring high-capacitance capacitors, the measurement may
take about 30 seconds before the result becomes stable.
Diode test
Connect the test leads to the jacks marked “VΩ” and “COM” and
set the knob to the LED symbol. The probes are now touched to
the diode terminals: once in the forward and then in the reverse
direction. If the diode is working, it will show a voltage drop in its
forward direction expressed in mV. If connected in the reverse di-
rection, the display will show the overload symbol. Working diodes
are characterized by a low resistance in the forward direction and a
high resistance in the reverse direction.
It is absolutely forbidden
to test diodes through which electric current is fl owing.
Conduction test
Connect the test leads to the jacks marked “VΩ” and “COM”. Set
the selector to the buzzer symbol. If themeter is used to measure
conduction, the built-in buzzer will sound whenever the measured
resistance drops below 30 Ω. The buzzer can also be heard in the
range from 30 Ω to 100 Ω.
It is absolutely forbidden to test con-
ductivity in circuits through which electric current is fl owing.
Transistor test
Set the measuring range switch to the position marked with the
“hFE”
symbol (transistor gain factor measurement). Depending
on the type of transistor you have, choose either the PNP or the
NPN socket, taking care to insert the transistor’s terminals in holes
marked with the letters E – emitter, B – base, C – collector. If the
transistor is working and the connection is correct, the result of the
gain measurement will be shown on the display.
It is absolutely
forbidden to test transistors through which electric current is
fl owing.
MAINTENANCE AND STORAGE
Wipe the meter with a soft cloth. Larger amounts of dirt should be
removed with a slightly damp cloth. Do not immerse the product in
water or any other liquid. Do not use solvents, corrosive or abrasive
agents for cleaning. Care should be taken to keep the contacts of
the meter and the test leads clean. Clean the contacts of the test
leads with a cloth slightly soaked in isopropyl alcohol. In order to
clean the contacts of the meter, turn off the meter and remove the
battery. Turn the meter over and shake it gently so that larger piec-
es of dirt fall out of the meter connectors. Lightly soak a cotton stick
with isopropyl alcohol and clean each contact. Wait until the alcohol
evaporates, then install the battery. The meter should be stored in a
dry room in the supplied unit packaging.
ENVIRONMENTAL PROTECTION
Correct disposal of this product: This marking shown on
the product and its literature indicates this kind of product
mustn’t be disposed with household wastes at the end of its
working life in order to prevent possible harm to the environment
or human health. Therefore the customers is invited to supply to
the correct disposal, diff erentiating this product from other types
of refusals and recycle it in responsible way, in order to re - use
this components. The customer therefore is invited to contact the
local supplier offi ce for the relative information to the diff erentiated
collection and the recycling of this type of product.
Содержание VOREL 81775
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