Toya VOREL 81775, Оригинальное руководство пользователя

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O R I G I N A L I N S T R U C T I O N S
GB
Resistance
Range Resolution Accuracy
200 Ω 0.1 Ω ±(1.0% +10)
2 kΩ 1 Ω
±(1.0% +4)
20 kΩ 10 Ω
200 kΩ 100 Ω
2 MΩ 1 KΩ
20 MΩ 10 KΩ ±(1.0% +10)
200 MΩ 100 KΩ ±(5% +10)
Open circuit voltage approx. 0.5 V (200 MΩ 3 V range; Overload protec-
tion: 250 V DC / AC RMS
Capacitance
Range Resolution Accuracy
20 nF 10 pF
±(4% +5)
200 nF 100 pF
2 uF 1 nF
20 uF 10 nF
200 uF 100 nF
Overload protection: fuse F0.5 A/250 V
Transistor test Diode test
Range h
FE
Measurement conditions
h
FE
0 ~1000 I
F
= 1 mA U
R
= 1.5 V
Measurement conditions IB = 2 μA;
UCE = 1 V
Accuracy: ± (% of indi weight of the least signifi cant digit)
OPERATION
CAUTION! To avoid the risk of electric shock, disconnect the test
leads and switch off the meter before opening the casing.
Safety instructions
Do not operate the meter in an atmosphere with excessive humidity
or in the presence of toxic or fl ammable vapours, or in an explosive
atmosphere. Before each use, check the condition of the meter and
the test leads. If you notice any faults, do not start its operation.
Replace damaged cables with new ones, devoid of defects. In the
case of any doubts, you should contact the manufacturer. During
measurement the test leads should be held by the insulated parts.
Do not touch the measurement points or unused measuring jacks
of the meter. Disconnect the test leads before changing the meas-
ured quantity. Never carry out maintenance work without ensuring
that the test leads have been disconnected from the meter and that
the meter itself has been switched off .
Replacing the battery
The multimeter requires batteries, the number and type of which
are specifi ed in the technical specifi cations. It is recommended to
use alkaline batteries. To install a battery, open the instrument cas-
ing or the battery compartment cover on the underside of the meter.
Before accessing the battery compartment it may be necessary to
slide off the cover of the meter casing. Connect the battery accord-
ing to its terminal marking, close the casing or battery compartment
cover. If a battery symbol appears on the screen, the battery must
be replaced. For the sake of measurement accuracy, it is recom-
mended to replace the battery as soon as possible after the battery
symbol appears.
Fuse replacement
The instrument uses a fast-acting safety fuse. If the fuse is dam-
aged, it should be replaced by an authorised manufacturer service
centre. Always replace a blown fuse with a new fuse with identical
electrical parameters.
Switching the meter on and o ff
Press the switch button, the display will show some digits and
symbols depending on the position of the range switch. Press the
switch again to turn off the meter. If the button is in the off position
the screen should be switched off . The meter turns off automatically
if not in use. After about 15 minutes of inactivity, the meter will auto-
matically turn off . This will reduce battery consumption.
HOLD button
The button is used to retain the measured value on the display.
When pressed, the button will ensure that the currently displayed
value remains on the display, even after the measurement is over.
Press the button again to go back to the measurement mode. The
operation of this function is indicated on the display with the “H”
character.
Connecting test leads
If the test lead plugs are capped, the caps must be removed before
plugging the leads into the jacks. Connect the leads in accordance
with the instructions in the manual. Now remove the covers (if any)
of the measuring parts and proceed with the measurements.
MEASUREMENT PROCEDURE
Depending on the current position of the range switch, the display
will show three digits. If the battery needs to be replaced, the mul-
timeter indicates this by showing the battery symbol on the display.
If the sign “–” appears on the display before the measured value,
it means that it has a reversed polarity relative to the meter’s con-
nection. If an overload symbol appears on the display, it means that
the measuring range has been exceeded and the measuring range
must be changed to a higher one.
If the scale of the measured value is not known, set the highest
measuring range and reduce it after reading the measured value.
The measurement of small quantities with a high measuring range
involves the greatest measurement error. If you select the highest
voltage measuring range, the display will show “HV” or a lightning
symbol. Special care should be taken when measuring quantities
within the highest voltage range to avoid electric shock.
CAUTION! Never allow the measuring range of the meter to be
smaller than the measured value. This can damage the meter
and cause electric shock.
The correct connection of the leads is:
The red lead goes in the jack marked “VΩ”, “mA” or “20A”.
The black lead goes in the jack marked “COM”.
In order to achieve the highest possible measurement accuracy,
optimal measurement conditions should be ensured. The ambient
working temperature should be in the range from 18 to 28
o
C. and
relative air humidity <75%.
Example of accuracy determination
Accuracy: ± (% of indi weight of the least signifi cant digit)
Measurement of DC voltage: 1.396 V
Accuracy: ±(0.8% +5)
Calculation of error: 1.396 x 0.8% + 5 x 0.001 = 0. 0.005
= 0.016168
Measurement result: 1.396 V ± 0.016 V
Voltage measurement
Connect the test leads to the jacks marked “VΩ” and “COM”. Set
the range switch to the DC or AC voltage measurement position.
Connect the test leads in parallel to an electrical circuit and read
the resultant voltage. Never measure a voltage which is higher than
the maximum measuring range. This can damage the meter and
cause electric shock.