Maintenance - Maxwell Digital Multimeters 25108 Anleitung

EN
User Manual
the screen in mV-s. If the diode is closing, the
screen shows "1".
transistor hFe measuring
Set the RANGE switch to the hFE position.
•
Check if the transistor is PNP or NPN and place
•
the base, the emitter and the collector to the
respective hFE connectors.
The device shows the approximate hFE value
•
for the base current's 10μA and V
Continuity test with audible signal
Connect the red measuring wire to the "VΩmA"
•
connector and the black one to the "COM"
connector.
Set the RANGE switch to the " " position.
•
Connect the measuring wires to two points of
•
the circuit. If the resistance is below 30Ω±20Ω,
the device beeps.
logical test
Set the RANGE switch to the "
•
The test signal (50Hz) appears on the screen
•
for the "VΩmA " and "COM" connectors. The
outward voltage is appr. 5V p-p with 50KΩ
impedance.
M
aintenance
replacing the battery and the fuse
A fuse should seldom be replaced. The melting
•
of the fuse is a result of misuse almost every
time.
If the " " symbol appears on the screen, the
•
battery needs to be replaced.
To replace the battery and the fuse remove
•
the 2 screws from the bottom of the battery
container and replace the old ones to new
ones with paying attention to the polarity.
Warning!
To avoid electric shock make sure that the
measuring wires are removed from any circuits
before opening the device!
accessories
User manual
•
Measuring wires
•
Paper box
•
9V battery
•
2,8V state.
CE
" position.