Input Jacks; Measuring Voltage; Measuring Current; Measuring Resistance - Velleman DVM 68 Operation Manual

2.4 Input Jacks

This meter has four input jacks that are protected against overload to the limits.
During use, connect the black test lead to the COM jack and the red test lead as shown
below
Function
DCV / ACV
kHz
Ω /
/
µA / mA
nF / µF
A
µA/ mA and A ranges are protected by fuses.

3. Operating instructions

3.1 Measuring Voltage

1) Connect the black test lead (-) to the COM jack and the red test lead (+) to the
V/Ω/F jack.
2) Set the function switch at V
the source or load under measurement.
3) Read LCD display. The polarity of red connection will be indicated when making a
DC measurement.

3.2 Measuring Current

1) Connect the black test lead (-) to the COM jack and the red test lead (+) to the
mA/Cx jack for a maximum of 300mA. For a maximum of 10A, move the red lead to
the A jack.
2) Set the function switch at µA, mA or A range to be used and push
select DCA or ACA mode.
3) Connect test leads IN SERIES with the load in which the current is to be
measured.
4) Read LCD display. The polarity of red lead connection will be indicated when
making a DC measurement.

3.3 Measuring Resistance

1) Connect the black test lead (-) to the COM jack and the red test lead (+) to the
V/Ω/F jack.
2) Set the function switch at Ω range to be used and connect test leads across the
resistance under measurement.
VELLEMAN
Red Lead Connection
V / Ω / F
V / Ω / F
V / Ω / F
mA / Cx
mA / Cx
A
or V∼ range to be used and connect test leads across
Input Limits
1000V DC or 750V AC rms
250V DC or AC rms
250V DC or AC rms
300mA DC or AC rms
300mA fuse protected
10A DC or AC rms
4
/ ∼ button to
GB