Velleman DVM1090 User Manual - page 10
DVM1090 GB
9
5.9. Measuring
AC
Current
WARNING
Deactivate the circuit to be tested before connecting it to the meter.
1. Connect the black test lead with the COM jack and the red test lead with the A jack for current measurements up
to 200mA. Move the red lead to the 10A jack for measurements up to 10A.
2. Select the desired A-range with the range switch.
3. Select the AC measuring mode with the DC/AC button.
4. Connect the test leads in series with the load to be measured.
5. Read the value from the LCD.
REMARKS
•
The LCD displays the overrange indication “1” if the measured value is too high for the range you are using.
Select a higher range.
•
Place the range selector in the highest position if the value to be measured is unknown beforehand.
•
Respect the limit values
: the max. current for socket A is 200mA, the max. current for the 10A socket is 10A.
The fuse will blow if the limit values are exceeded.
5.10. Resistance Measurements
WARNING
Disconnect the circuit to be tested and make sure that all capacitors are fully discharged before measuring the in-
circuit resistance.
1. Connect the black test lead with the COM jack and the red test lead with the
Ω
jack.
2. Select the desired
Ω
range with the range switch.
3. Connect test leads with the resistance under measurement.
4. Read the value from the LCD.
REMARKS
•
The LCD displays the overrange indication “1” if the measured value is too high for the range you are using.
Select a higher range.
•
The meter may need a few seconds to display a stable reading when measuring resistances > 1M
Ω
.
•
The overrange indication “1” is displayed when the input is not connected e.g. in case of an open circuit.
5.11. Capacitance Measurements
WARNING
Disconnect the test leads from the circuits to be measured before testing a capacitor in order to avoid electroshocks.
Also make sure the capacitors have been discharged fully before inserting them into the socket.
1. Connect the black test lead with the COM jack and the red test lead with the jack.
2. Select the desired F range with the range switch and press the L/C button.
3. Make sure the capacitor has been fully discharged and connect the test leads with the capacitor to be tested.