Measuring Resistance - USAG 075 A Manuel D'utilisation

b. The DC voltage under measurement is more than about 600V dc when the meter is in
the highest DC voltage range.
c. The DC current under measurement is more than about 10A dc when the meter is in the
highest DC current range.
d. The AC current under measurement is more than about 10A ac when the meter is in the
highest AC current range.
Measuring DC or AC Voltage
1. Connect the black test lead to the "COM" terminal and thered test lead to the
" " terminal.
2. Set the range switch to the "
" " position for ac voltage measurement.
3. Select autorange mode or manual range mode with the "RANGE" button.
measured beforehand, select the highest range and then reduce it range by range until
satisfactory resolution is obtained.
4. Connect the test leads across the source or circuit to be measured.
5. Read the reading on the display. For DC voltage measurements, the polarity of red lead
connection will be indicated as well.
Note: To avoid electric shock to you or damages to the meter, never apply a voltage higher
than 600V between the terminals.
Measuring DC or AC Current
1. Connect the black test lead to the "COM" terminal. If the current to be measured is less
than 400mA, connect the red test lead to the "µA/mA" terminal. If the current is between
400mA and 10A, connect the red test lead to the "10A" terminal instead.
2. Set the range switch to desired
3. Press the "S" button to select DC current or AC current measurement, the display will
show the corresponding symbol.
4. Turn off power to the circuit which you want to measure. Then discharge all high voltage
capacitors.
5. Break the circuit path to be measured, then connect the test leads in series with the
circuit.
6. Turn on power to the circuit, then read the display. For DC current measurements, the
polarity of the red test lead connection will be indicated as well.
Note: If the magnitude of the current to be measured is not known beforehand, select the
highest range and then reduce it range by range until satisfactory resolution is obtained.

Measuring Resistance

1. Connect the black test lead to the "COM" terminal and the red test lead to the
" " terminal.
2. Set the range switch to position.
3. Connect test leads across the object to be measured.
4. Read the reading on the display.
Note :
1. For measurements > 1M , the meter may take a few seconds to stabilize reading. This
is normal for high resistance measurements.
2. When the input is not connected, i.e. at open circuit, "OL" will be displayed as overrange
indication.
3. Before measurement, disconnect all power to the circuit to be tested and discharge all
capacitors thoroughly.
" position for dc voltage measurement or to the
or position.
21