Velleman DVM030 Bedienungsanleitung Seite 13

10.2 DC CURRENT MEASUREMENT
Do not measure circuits that may contain voltages > 1000 VDC or
> 750 VAC
Use extreme caution when measuring voltages higher than 60 VDC
or 30 VAC rms.
Always place your fingers behind the protective edges of the test
probes while measuring!
1. Remove the power from the circuit under test and discharge the
capacitors of the circuit.
2. Set the rotary switch to current measuring range.
3. Insert black test lead banana plug into the negative COM jack, for
current measurement less than 400mA insert the red test lead banana
plug into the µ/mA jack, for current measurement between 400mA to
10A, insert the red test lead banana plug into 10A jack.
4. Break the circuit under test, connect the black test lead to the more
negative side of the break, and connect the red test lead to the more
positive side of break.
5. Turn on the power of circuit under test and read the value in LCD
display. If only display OL, which means the input over range and
requested to select the higher range.
6. Turn off the power of circuit under test and discharge all capacitors,
remove the test leads and recover the measured circuit.
Notes
• Set the rotary switch to higher range if not known the current range
under test, and then lower down until the best accuracy.
• If display"OL" for over range, set the rotary switch to higher range.
• Indicates the max current is 500mA or 10A based on jacks the red test
leads to be inserted, fuse will be blown out at over-range current.
10.3 RESISTANCE MEASUREMENT
Do not conduct resistance measurements on live circuits. Make sure
all capacitors in the circuit are depleted.
1. Set the rotary switch to Ω position, press "FUNC" button to indicate Ω
on the display.
2. Insert the black test lead banana plug into the negative COM jack,
insert the red test lead banana plug into the positive V Ω jack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
V. 01 – 04/05/2023
DVM030
13 ©Velleman Group nv