Sonel CMM-40, User Manual

Page: 55 / 112

CMM-40
– USER MANUAL
53
5.3 mV voltage measurements
ATTENTION!
Do not measure mV voltages if a motor on the circuit is being
switched ON or OFF. Large voltage surges may occur that
can damage the meter.
In order to realise a measurement of mV voltage, it is necessary to
realise the following actions:

Set the function switch to the mV position,

with the RANGE button set the measurement range manually
if necessary,

Press the MODE
button to indicate “
DC
” or “
AC
”, or in AC
range press EXIT for two seconds and chose
”
AC+DC
”,

Insert the black test lead banana plug into the negative COM
jack. Insert the red test lead banana plug into the positive V
jack,

Touch the black test probe tip to the negative side of the cir-
cuit. Touch the red test probe tip to the positive side of the cir-
cuit,

Read the mV voltage in the display,

Having done the measurement disconnect the test leads from
the meter.