Velleman DVM68 - Manual (Page 7)

DVM68
25.02.2011 7
c. DATA HOLD button
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.
d. AC/DC Current of / selecting button
Push this button to select AC or DC current measuring function when the function switch is set
at µA, mA, A positions.
Push this button to select or measuring when the function switch is set at
position.
e. 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 Red Lead Connection Input Limits
DCV / ACV V / Ω / F 1000V DC or 750V AC rms
kHz V / Ω / F 250V DC or AC rms
Ω / /
V /
Ω
/ F 250V DC or AC rms
µA / mA mA / Cx 300mA DC or AC rms
nF / µF mA / Cx 300mA fuse
A A 10A DC or AC rms
µA/ mA and A ranges are protected by fuses.
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
verify the connections, selected function and range.
• 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
that might exceed the indicated category values.
• Disconnect the test leads from the tested circuit before rotating the range
change functions.
• 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.
• 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
fingers behind the probe barriers at all times during measurement.
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
• Set the rotary selector to V for AC measurements or to V for DC measurements.
• 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.
Rev. 01
©Velleman nv
When this button is pushed, the display will show the last reading and " D-H " symbol will
Data holding will be cancelled automatically when the function switch is rotated.
Push this button to select AC or DC current measuring function when the function switch is set
measuring when the function switch is set at /
This meter has four input jacks that are protected against overload to the limits. During use,
test lead as shown below
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
µA/ mA and A ranges are protected by fuses.
Be very careful when measuring live circuits.
Before measuring, always make sure the meter and/or test probes are not damaged and
Never exceed the limit value for protection. This limit value is listed separately in the
to a circuit which is being tested.
Only use the meter in the indicated overvoltage/installation category. Never measure voltages
Disconnect the test leads from the tested circuit before rotating the range selector in order to
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.
60Vdc or 30Vac rms. Keep your fingers
measurements on live circuits.
e voltages > 600V CAT III or > 1000V CAT II may
Always be careful when working with voltages above 60Vdc or 30Vac rms. Keep your
probe barriers at all times during measurement. Do not touch unused
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 VΩF jack.
for DC measurements.