Matco Tools MD79 - OPERATION: Basic Voltage and EF Functions; ACV, DCV, DC+ACV, Hz, EF (NCV) Functions; Note on ACV Function

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.