Frequency Or % Duty Cycle Measurements; - 20 Ma Measurements; Special Functions; Autoranging/Manual Range Selection - Sonel CMM-40 Manual De Uso

The temperature probe is fitted with a type K mini connector.
A mini connector to banana connector adaptor is supplied
for connection to the input banana jacks.
5.11

Frequency or % duty cycle measurements

In order to realise frequency or % duty cycle measurement it is nec-
essary to realise the following actions:

Set the rotary function switch to the green Hz/% position,

Insert the black lead banana plug into the negative COM jack
and the red test lead banana plug into the positive Hz jack,

Touch the test probe tips to the circuit under test

Read the frequency on the display,

Press the MODE button to indicate "%",

Read the % duty cycle in the display,

Having done the measurement disconnect the test leads from
the meter.
% 4 – 20 mA measurements
5.12
In order to realise measurement it is necessary to realise the follow-
ing actions:

Set up and connect as described for DC mA measurements,

Set the rotary function switch to the 4-20mA% position,

The meter will display loop current as a % with 0mA=-25%,
4mA=0%, 20mA=100%, and 24mA=125%.Special functions
6.1

Autoranging/manual range selection

When the meter is first turned on, it automatically goes into au-
toranging. This automatically selects the best range for the meas-
urements being made and is generally the best mode for most
measurements. For measurement situations requiring that a range
be manually selected, perform the following:
Caution:
6

Special functions

CMM-40 – USER MANUAL
,
59