3B Scientific Digital Multimeter E - Manual (Page 4)

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Subject to technical amendments
© Copyright 2012 3B Scientific GmbH
• Connect the black test lead to the meas-
urement socket "COM" and the red test lead
to the "V/Ω" socket.
A built-In buzzer sounds if the resistance is less
than 30 ± 10 Ω.
6.1.6 Transistor hFE test
• Set the measurement range dial to hFE.
• Make sure the transistor is "NPN" or "PNP"
type. Insert the transistor correctly into the
corresponding transistor test socket.
Display reading is approx. transistor hFE value.
Base current approx. 10 µA, V
CE
approx.2.8 V.
6.2 LCD Display panel angle selection
LCD display panel is locked in lie down position
in normal operating condition and storage.
• To change the display panel angle, push
down the button which is above the top
case, and release lock.
• Rotate the display panel to the best angle.
6.3 Battery and fuse replacement
• Battery and fuse replacement should only be
done after the test leads have been discon-
nected and power is off.
• Loosen screws with suitable screwdriver and
remove case bottom.
• Replace the battery resp. the fuse.
• Replace the case bottom and reinstall the
three screws. Never operate the meter
unless the case bottom is fully closed.
7. Maintenance
Beyond replacing batteries and fuses, do not
attempt to repair or service your meter unless
you are qualified to do so and have the relevant
calibration, performance test, and service in-
structions.
• Turn off the meter and remove the test leads
before you service or clean the device.
• Periodically wipe the case with a damp cloth
and mild detergent.
• Do not use abrasives or solvents.
Dirt or moisture in the measurement sockets can
affect readings.
• Shake out any dirt that may be in the meas-
urement sockets.
• Soak a new swab with isopropyl alcohol and
work around the inside of each measure-
ment socket.
8. Disposal
• The packaging should be disposed of at
local recycling points.
• Do not dispose of the battery in the regular
household garbage. Follow the local regula-
tions.
• Should you need to dispose of the equip-
ment itself, never throw it away in normal
domestic waste. Local regulations for the
disposal of electrical equipment will apply.