Matco Tools MD79 Manual Del Usuario página 5

4
4) OPERATION
WARNING: Before and after hazardous voltage measurements, test
the voltage function on a known source such as line voltage to
determine proper meter functioning.
ACV, DCV, DC+ACV Line-level Hz, & EF (NCV) functions
Inputs, other than that of EF as described below, are made through the
test lead terminals COM/+. Defaults at ACV* Function. Press SELECT
button momentarily to select DCV, DC+ACV, Line-level Hz or EF**
(NCV) function in sequence.
Note:
*ACV (and hence AC+DCV & Line-level Hz) function is equipped with
digital low-pass filter, and is capable of dealing with VFD (Variable
Frequency Drives) signals. It also improves ACV reading stability in
noisy electrical environments.