Before Use; Dc Voltage Measurement - Velleman AVM460 Manual Del Usuario

• Only use the included test leads. When damaged, replace them with test leads of
the same type and with the same specifications. Test leads, including the probes,
must be in good order: clean, with no broken or cracked insulation.
• Always verify that all connections are reliable and safe.
• Before measuring, always check the selected range.
• Avoid body contact with ground potential (e.g. metallic terminals, output sockets,
lead clamp...) while measuring. Make sure to be electrically insulated from ground
during measurement.
• Always use the device within its specified range. NEVER switch to the current or
resistance ranges when measuring voltages.
• Calibration and repair must be performed by a qualified technician. Refer to your
local dealer.
• Never attempt to measure voltages when connected to the current terminal.
• Replacement fuses must be of the correct type and rating.
4.
Features
• CAT II 300V MAX to earth
• 3-colour scale display
• voltage (AC & DC) measurements: up to 500V
• resistance measurements: with ohm adjusting knob
• battery-check function
• fuse and diode protection
• 1 x AA-battery included
• comes with protection holster
5.
Use
GENERAL
This compact and sensitive multi-meter can accurately measure AC and DC
voltages, DC current, resistance, and there is also a battery checker. The single
button function and range control is easy to operate. It has a mirrored scale for
making accurate readings with 3 different colours for rapid scale identification. The
handy and sturdy case with optional rubber protection makes this meter a user
friendly instrument. It will provide many years of trouble free service.

BEFORE USE

• Open the back of the unit and place one AA size battery into the battery holder.
Ensure that the polarity corresponds to that shown.
• Note: for the best readings, keep the meter flat on a non-metallic surface.
Select the range such that the pointer lies in the upper 1/3 of the meter scale.
• If the pointer does not rest exactly over "0" to the left of the scale, turn the
plastic screw in the lower centre of the meter face to bring the needle to "0".
• Ensure that the test leads are the right way around when measuring DC voltage
and current.

DC VOLTAGE MEASUREMENT

• Set the selector switch to one of the DCV positions: it is better to start with a
high voltage range and then switch down.
• Position the ends of the test probes on the circuit under test: ensure they are
the right way around.
• Read the voltage on the black DC scales.
Be extremely careful when measuring voltages above 50V.
13/02/2009
AVM460
3
©2008 Velleman Components nv
®