Voltage Measurements - Velleman DVM68 Notice D'emploi

c. DATA HOLD button
When this button is pushed, the display will show the last reading and " D-H " symbol will When this button is pushed, the display will show the last reading and " D
appear until the button is pushed again.
Data holding will be cancelled automatically when the function switch is rotated. Data holding will be cancelled automatically when the function switch is rotated.
d. AC/DC Current of
Push this button to select AC or DC current measuring function when the function switch is set Push this button to select AC or DC current measuring function when the function switch is set
at A, mA, A positions.
Push this button to select
position.
e. Input jacks
This meter has four input jacks that are protected against overload to the limits. During use, 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 /
/
A / mA
nF / F
A
7. Operation
Risk of electric shock during operation. Be very careful when measuring live circuits.
Before measuring, always make sure the meter and/or test probes are not damaged and Before measuring, always make sure the meter and/or test probes are not
verify the connections, selected function and range.
•
Never exceed the limit value for protection. This limit value is listed separately in the Never exceed the limit value for protection. This limit value is listed separately in the
specifications for each range of measurement.
•
Do not touch unused terminals when the meter is linked to a circuit which is being tested.
•
Only use the meter in the indicated overvoltage/installation category. Never measure voltages Only use the meter in the indicated overvoltage/installation category. Never measure voltages
that might exceed the indicated category values.
•
Disconnect the test leads from the tested circuit before rotating the range Disconnect the test leads from the tested circuit before rotating the range selector in order to
change functions.
•
When carrying out measurements on a TV set or switching power circuits, always remember When carrying out measurements on a TV set or switching power circuits, always remember
that high amplitude voltage pulses at the test points might damage the meter. that high amplitude voltage pulses at the test points might damage the meter.
•
Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your fingers
behind the probe barriers at all times during measurement.
•
Do not measure current in circuits with voltages > 250V
•
Never perform resistance, diode, continuity or capacitance measurements on live circuits.
Make sure all capacitors in the circuit are discharged.

7.1 Voltage measurements

Do not measure circuits where voltages > 600V CAT III or >
occur.
Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your
fingers behind the probe barriers at all times during measurement.
terminals when the meter is linked to a circuit which is being tested. terminals when the meter is linked to a circuit which is being tested.
•
Connect the black test lead to the COM jack and the red test lead to the V F jack. Connect the black test lead to the COM jack and the red test lead to the
•
Set the rotary selector to V
•
Connect the test leads to the circuit under test.
•
The measured value appears on the display.
•
When desired, select a range manually with the RANGE button.
25.02.2011
DVM68
/ selecting button
or measuring when the function switch is set at 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
e voltages > 600V CAT III or > 1000V CAT II may
probe barriers at all times during measurement. Do not touch unused
for AC measurements or to V
7
test lead as shown below
Input Limits Input Limits
1000V DC or 750V AC rms 1000V DC or 750V AC rms
250V DC or AC rms 250V DC or AC rms
250V DC or AC rms 250V DC or AC rms
300mA DC or AC rms 300mA DC or AC rms
300mA fuse 300mA fuse protected
10A DC or AC rms 10A DC or AC rms
A/ mA and A ranges are protected by fuses. A/ mA and A ranges are protected by fuses.
Be very careful when measuring live circuits.
to a circuit which is being tested.
60Vdc or 30Vac rms. Keep your fingers
measurements on live circuits.
for DC measurements. for DC measurements.
Rev. 01
/
©Velleman nv