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Velleman DVM852 Manual

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DVM851
V. 03 – 23/10/2015 13 ©Velleman nv
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 "VmA" and the black one to "COM".
2. Set the range switch in the " " position.
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.
… 13 …


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