Input Jacks; Measuring Voltage; Measuring Current; Measuring Resistance - Velleman DVM68 Manual Del Usuario

2.3 AC/DC Current or
Push this button to select AC or DC current measuring function when the function switch is set at µ A, mA, A
positions.
Push this button to select

Input Jacks

2.4
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 /
/
µ A / mA
nF / µ F
A
µ A/ 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
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 µ A, mA or A range to be used and push
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.
Remarks :
1) For resistance above 3.26MΩ, it may take a few seconds to stabilize reading. This is normal for high resistance
measuring.
2) When the input is not connected, i.e. at open circuit, the figure "OL" will be displayed for the overrange condition.
3) When checking in-circuit resistance, be sure the circuit under test has all power removed and all capacitors are
fully discharged.
DVM68
/ Selecting button
or measuring when the function switch is set at
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 the source or load under
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
/ ∼ button to select DCA or ACA mode.
- 5 -
/ position.
VELLEMAN