Maintenance - Maxwell 25301 User Manual

attention to the correct polarity when needed.
Note:
if the measured capacitor's value exceed the maximum
value of the range and the device shows overload („1"),
select a higher range.
unit: 1 nF=10 -3 μF or 1000 pF
do not connect external voltage or current to the
connector. turn off power and discharge capacitors
before measuring. discharge electrolyte capacitors before
measuring!
diode and continuity test
Connect the black measuring wire to the
•
„COM" connector and the red one to the „V/ Ω"
connector. (Note: the polarity of the red wire
is +)
Set the function switch to
•
Connect the wires to the ends of the diode.
•
The opening voltage of the diode is displayed
on the screen.
Connect the wires to the two points of
•
the circuit. There is a beeping sound if the
resistance is below 90Ω.
Note:
if you do not connect a part to the connector (or there is
•
a break), the screen will show „1".
the diode receives 1ma of current under the test.
•
the display shows the opening voltage of the diode
•
in mV and overload if you connected the diode with
reverse polarity.
transistor hFe test
Set the function switch to hFE position.
•
Determine if the transistor is NPN or PNP
•
and place the part into the connector
corresponding to its type.
The amplification factor of the transistor is
•
displayed on the screen.
I = 10 μA, V = 2,8 V
BC
w
arning
When measuring voltage make sure that the
•
wires do not connect to a current measuring
connector and that the function switch is not
set to resistance or diode measuring mode.
Always make sure that the wire is connected to
the proper connector.
Be careful when measuring voltage above 50V,
•
especially with high voltage equipment.
Avoid connecting to "live" circuits.
•
When measuring current, disconnect the
•
power from the circuit before connecting the
multimeter and do not measure above 20A.
Before measuring resistance and diode make
•
sure the circuit is not under power.
Always use the proper function and range for
•
the measurement. If you have doubts about
the range of the measurement, select the
highest available one and move backwards
from that.
Make sure that the wires and the insulation are
•
intact.
Be careful, do not exceed the thresholds given
•
in the manual.
Only replace fuses to the same type and value.
•
When replacing batteries or fuses disconnect
•
position. all external power sources and turn the
multimeter off.
M
Battery replacement (1 x 9V)
Disconnect all external power sources from the
•
device. Turn the multimeter off and remove
the measuring wires.
Unscrew the screws and remove the lower
•
cover.
Remove the depleted battery and replace it to
•
one of the same type.
Fuse replacement
Disconnect all external power sources from the
•
device. Turn the multimeter off and remove
the measuring wires from the connectors.
Unscrew the screws and remove the lower
•
cover.
Replace the melted fuse to one of the same
•
type and value (5x20 mm, 200 mA / 250 V „F"
type.)
aintenance
EN
User Manual