Center 28 - Measurement of Duty Cycle; Battery Changing

TRMS Clamp Meter
10
6-9 Measurement Of Duty Cycle (%)
Switch the main function to range.
Press button to
%
range.
Connect red test lead to“+”terminal and black one to the “COM”
terminal.
Place the touch prods in contact with the points whose % is to be
measured.
Read the result on the LCD panel.
A duty cycle is the percent of time that an entity spends in an active
state as a function of the total time under consideration.
Definition
In a periodic event, duty cycle is the ratio of the duration of the event
to the total period of a signal.
duty cycle 


100%
where
τisthedurationthatthefunctionisactive.
Tistheperiodofthefunction.
7. BATTERY CHANGING
(1) When the battery voltage drop below proper operation range the
symbol will appear on the LCD display and the battery
needs to be changed.
(2) Before changing the battery, switch the main dial to “OFF ”and
disconnect test leads.
(3) Open the back cover by an appropriate tool.
(4) Replace the old battery with new 3V (CR2032) battery.
(5) Close the Battery cover .