Transistor Test; Audible Continuity Test; Battery And Fuse Replacement - Velleman DVM851 Mode D'emploi

10.6 TRANSISTOR TEST

Do not conduct transistor measurements on live circuits. For
transistor test use the included adaptor socket.
1. Connect the black test lead (-) to the "COM" jack and the red test
lead (+) to the "mA" jack.
2. Set the rotary switch in the "hFE" position.
3. Determine whether the transistor is of the NPN- or PNP-type and
locate the emitter, the base and the collector. Insert the leads into
the proper holes in the included transistor socket.
4. Connect the black test lead (-) to the "COM" terminal and the red
test lead (+) to the other terminal of the transistor socket.
5. The display will show the approximate hFE-value at the moment of
testing. Base current 10μA, Vce 3V.

10.7 AUDIBLE CONTINUITY TEST

Do not conduct diode- or continuity measurements on live
circuits. Make sure all capacitors in the circuit are depleted.
1. Connect the red test lead to "VmA" and the black one to "COM".
2. Set the range switch in the "
3. Connect the test leads to two points of the circuit to be tested. If
continuity exists, the built-in buzzer will sound.

Battery and Fuse Replacement

WARNING: To avoid electrical shock always disconnect the
test leads prior to opening the housing. To prevent fire
hazards, only use fuses with the same ratings as specified in
this manual.
Remark: refer to the warning on the battery compartment
There are no user-serviceable parts inside the device.
Refer to an authorized dealer for service and/or spare parts.
Disconnect the test leads from the test points and remove the
test leads from the measuring terminals before replacing the
batteries or fuses.
 When" " is displayed, the battery should be replaced.
 Fuses rarely need replacement and blown fuses almost always result
from human error.
V. 03 – 23/10/2015
DVM851
" position.
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