User Manual

47
UT108/109 OPERATING MANUAL
present measurement range.
O. Data Outputting
● Press and hold Hz button for over 2 seconds to enter or exit RS232C or USB mode.
● The sleep mode feature will be disabled after entering RS232C or USB mode.
P. Display backlight
Press and HOLD button for over 2 seconds to turn on or turn off the display backlight.
Q. The BLUE button
It uses for selecting the required measurement function when there is more than one
function at one position of the rotary switch.
R. Automatic power off
The meter power off automatically if you have not changed the rotary switch or pressed a
button for 15 minutes.