Sonel CMM-40, User Manual

Page: 53 / 112

CMM-40
– USER MANUAL
51
4.3 Test leads
The manufacturer guarantees correct measurement indications
provided original test leads are used.
WARNING:
Connection of inadequate test leads constitutes a risk of
electric shock with a dangerous voltage or may be a cause of
measurement errors.
5 Measurements
It is recommended to get acquainted thoroughly with the con-
tents of the present chapter since it describes the measurement
systems, the manner of realisation of measurements and the basic
principles of interpretation of the results.
5.1 DC voltage measurements
ATTENTION!
Do not measure DC 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 DC voltage, it is necessary
to realise the following actions:

Set the function switch to the VDC position,

with the RANGE button set the measurement range manually
if necessary,

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 voltage in the display,

Having done the measurement disconnect the test leads from
the meter.