Maxwell Digital Multimeters 25304 Bedienungsanleitung Seite 4

EN
User Manual
Usage
Check the 9V battery and press the POWER
•
button. If the battery is depleted, the battery
symbol appears on the screen.
The signs near the connectors warn about not
•
exceeding the inward voltage or current. This is
to prevent damage to the inside circuits.
Before measuring set the function switch to the
•
desired position.
If you are unsure about the magnitude of the
•
result, set the switch to the highest possible
range and go backwards until you reach the
correct setting.
DC and AC voltage measuring
Connect the black measuring wire to the „COM",
•
and the red one to the „V/ W /Hz" connector.
Set the function switch to the correct V position
•
and connect the wires to the voltage source
paralelly.
Note:
If you are unsure about the magnitude of the result, set the
•
switch to the highest possible range and go backwards until you
reach the correct setting.
set the DC / AC switch to the desired (DC or AC) function.
•
If only an „OL" is displayed on the screen, it signals overload.
•
switch to a higher range.
Do not connect voltage exceeding DC 1000 V / AC 700 V to the
•
connectors. Results may be displayed at higher voltages also, but
this may lead to damage to the inside circuits.
Do not touch the high voltage circuits while measuring.
•
DC and AC current measuring
Connect the black wire to the „COM" and the
•
red one to the „mA" connector (max. 200 mA)
or the „20A" connector for measuring 200 mA
or 20A.
Set the function switch to the proper range.
•
Connect the the wires to the circuit serially.
•
For measuring current between 200 mA and
•
20A follow the instructions above, but connect
the red wire to the „20A" connector.
Note:
If you are unsure about the magnitude of the result,
•
set the switch to the highest possible range and go
backwards until you reach the correct setting.
If only an „OL" is displayed on the screen, it signals
•
overload. switch to a higher range.
The maximum inward current is 200 mA or 20 A
•
depending on the connector. (For maximum 15
seconds.)Too much currency overheats the fuse which
needs to be replaced. The 20 A measuring range is not
protected.
Maximum overload voltage: 200 mV.
•
Resistance measuring
Connect the black wire to the „COM", and the red
•
one to the „V / W / Ω" connector.
Set the function switch to the desired resistance
•
range.
Touch the wires to the measured circuit paralelly.
•
Warning: make sure that the measured circuit is
not under power!
The maximum overload capability for the
•
connector is 250 V RMS (for maximum 10
seconds).
Note:
If the measured resistance value is over the maximum
•
threshold and the device signals overload („OL"), select a
higher range. When measuring above 1 MW it may take a
few seconds for the device to stabilize the displayed value.
This is completely normal for such resistors.
If you do not connect a resistor to the connector (or there is
•
a break) the display will show „OL" .
If you are measuring a resistor that is part of a circuit make
•
sure that the circuit is not under power and all capacitors are
discharged.
Do not connect inward voltage to the device as it may lead
•
to damage to the inside circuits.
The outward voltage on connectors not under power is
•
approximately 3 V.
Capacity measuring
Set the function switch to F position.
•
Connect the measured capacitor to the
•
CX connector. Pay attention to the correct
polarity.
Note:
If the measured value exceeds the maximum value of the
•
selected range and the device signals overload („OL"),
select a higher range.
Unit: 1 nF=10-3 μF vagy 1000 pF
•
Do not connect external voltage or current to the
•
connector! Turn off the power and discharge the capacitors
before measuring. Also discharge the electrolyte
capacitors before measuring!
Before measuring discharge the electrolyte capacitors
•
more times. (Close the capacitor to 10-20 seconds and V
measure the capacitor if it is discharged.)
Diode and continuity test
Connect the black measuring wire to the „COM" , the
•
red one to „V/Ω/Hz" connector. (Note: the polarity of
the red wire is: +)
Set the function to „
•
Touch the wires to the diode's connectors. The screen
•
shows the opening voltage of the diode.
Connect the wires to two points of the circuit. If the
•
resistance is below 90 Ω the device beeps.
" position.