Velleman DVM 890L User Manual - page 12
DVM890L GB
11
4.10 Diode Test and Audible Continuity Test
Range
Description
Test Condition
/
Display shows approx.
forward voltage of
diode
Forward DC current approx. 1mA
Reversed DC voltage approx. 2.8 Volts
/
Built-in buzzer sounds
if conductance is less
than approx. 30
Ω
Open circuit voltage approx. 2.8 Volts
5. Maintenance
Your Digital Multimeter is an electronic precision instrument. In order to avoid damage, avoid
tampering with the circuitry.
A: Never connect more than 1000 Volts DC or 700 Volts AC to the instrument.
B: Never connect a voltage source to the instrument with its function switch set to the OHM
position.
C: Never operate the DVM unless the back cover is in place and fully closed.
D: Battery and/or fuse replacement should only be performed once the test leads have been
disconnected and the power is OFF.
5.1 9-Volt battery replacement
Check the condition of the 9V battery when following the procedure described above. If the battery
needs to be replaced : open the back cover, remove the old battery and replace it with a battery of
the same type.
5.2 Fuse replacement
Should the fuse need replacement : only use 200mA fuses that are identical to the original in
physical size.