Omega HHM23 User Manual page 9

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.
Resistance and Continuity Measurements
1. Set the Function/Range switch to the desired resistance range or continuity
position.
2. Remove power from the equipment under test.
3. Connect the red test lead to the "VW " jack and the black test lead to the
"COM" jack.
4. Touch the probes to the test points. In ohms, the value indicated in the
display is the measured value of resistance. In continuity test, the beeper
sounds continuously, if the resistance is less than 100W .
WARNING
The accuracy of the functions might be slightly affected, when exposed to
a radiated electromagnetic field environment, eg, radio, telephone or
similar.
7