Prokit's Industries MT-3109 - Manual (Page 7)

MT-3109 AC/DC Digital Clamp Multimeter
Button Operation Performed
Select
 Press SELECT button to select the alternate
functions marked in blue color on the Meter's
faceplate including Hz, Duty%,
, ,
40 , and 400 .
 After the Meter entering Sleep Mode, press and
hold SELECT to turn the Meter on, it will disable the
Sleep Mode feature.
The Effectiveness of Functional Buttons
Not every functional buttons can be used on every rotary switch
positions. Below table describe which functional buttons can be
used on which rotary switch positions
Rotary Switch Functional Buttons
Positions SELECT RELA HOLD
● ● ●
Ω N/A ● ●
/ ● N/A ●
Hz / Duty% N/A ● ●
40 ● ● ●
400 ● ● ●
N/A ● ●
Display Symbols (see figure 2)
6