12
11
Ω
Hz
%
VFC
OFF
V
、
V
、
mV
μA mA A
8
.
Function
Selection
Knob
and
Buttons
Description
AC/DC voltage measurement
Resistance measurement
Diode PN junction voltage measurement
Circuit continuity measurement
Capacitance measurement
Frequency measurement
Duty ratio measurement
Temperature measurement
AC/DC current measurement
Frequency conversion voltage measurement (low-pass)
Power off
Functions
Buttons Operation:
RANGE button: press to switch between automatic/manual ranges, once every press will switch to a higher
gear, and it will jump to the minimum range when pressing at the maximum range. To quit the manual range
mode, users can press this button for over 2s or switch the function selection knob. (Only suitable for
V
,
V
,
A
,
Ω
)
MAX/MIN button (UT17B PRO): press to enter manual range mode and display the maximum value,
then press it again to display the minimum value. To exit the MAX/MIN measurement mode, press this button
for over 2 seconds or switch the knob. (Only suitable for
V
,
V
,
mV
,
Ω
)
MAX button (UT15B PRO): press to enter manual range mode and display the maximum value. To exit MAX
/MIN measurement mode, press this button for over 2 seconds or switch the knob. (Only suitable for
V
,
V , mV ,
Ω
)
MIN button (UT15B PRO): press to enter manual range mode and display the minimum value. To exit MAX/
MIN measurement mode, press this button for over 2 seconds or switch the knob. (Only suitable for
V
,
V , mV ,
Ω
)
REL button: press to save the first measured value as reference, then input again, the displayed value is the
different value between current measured value and the reference value, press it again to exit relative
measurement mode. (Only suitable for
V , V , mV , I ,
Ω
,
)
Hz/% button (UT17B PRO): under voltage and current measurement mode, press this button to switch to
frequency or duty ratio measurement mode.
SELECT button: press to select functions (only suitable for multi-range). Under AC voltage mode, press this
button will display VFC and enter low-pass filter measurement mode, which can measure variable frequency
voltage stably, press this button again to exit VFC measurement mode.
HOLD button (suitable for full range):
Press to lock hold the displayed value, and LCD will display symbol, press it again to relieve and enter the
normal measurement mode.
BL button ( ): press to turn on/off the background light sensing function.
LIGHT button ( ): turn on or off the flashlight lighting function
UT15B PRO/UT17B PRO User Manual
UT15B PRO/UT17B PRO User Manual
