Voltage Measurements - Omega HHM31 User Manual

Voltage Measurements

1. Connect the red test lead to the "VW " jack and the black test lead to the
"COM" jack.
2. Set the Function/Range switch to the desired voltage range and press the
"AC/DC" switch to toggle between the desired voltage type. If magnitude
of voltage is not known, set switch to the highest range and reduce until a
satisfactory reading is obtained.
3. Connect the test leads to the device or circuit being measured.
4. For dc, a (-) sign is displayed for negative polarity; positive polarity is implied.
Current Measurements
1. Set the Function/Range switch to the desired current range and press the
"AC/DC" switch toggle between to the desired current type.
2. For current measurements less than 200mA, connect the red test lead to the
µAmA jack and the black test lead to the COM jack.
3. For current measurements over 200mA or greater, connect the red test lead
to the 10A jack and the black test lead to the COM jack.
4. Remove power from the circuit under test and open the normal circuit path
where the measurement is to be taken. Connect the meter in series with the
circuit.
5. Use caution when measuring 10 amps on 10A range for 60s, please waiting
for 10 minutes for next measurement of 10 amps for safety reason.
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