9

Model UT231: OPERATING MANUAL

Operation Performed

AC Voltage (main display) + Frequency
(secondary display)
AC Current (main display) + AC Voltage
(secondary display)
Active power (main display) + Phase
angle (secondary display)
Apparent power (main display) +
Reactive power (secondary display)
Power factor (main display) + Phase
angle (secondary display)
Active Energy (main display) + Time
(secondary display)

Temperature 

 (main display) +

Temperature   (secondary display)
Press 

LOAD 

once, MR icon shown, the

Meter displays the next stored reading,
the left secondary display showing the
index increase one.
Press 

USB

 once to turn the USB

Button

MENU

Operation Performed

interface on, USB appears and the Meter
beeps.
Press 

USB 

again to turn the USB

interface off, USB disappears and the
Meter beeps.
It is invalid at active energy mode.
Press once to enter 

LOAD

 mode, MR

appears and the Meter beeps.
Press again to exit 

LOAD

 mode, MR

disappears and the Meter beeps.
Press and hold 

LOAD 

for 1 second to

display the stored data quickly.

Button

USB

USB

LOAD

Calibrating data.  It is not recommended to
calibrate the meter without authorization.

CAL

SAVE

Press once to store single reading, MEM
appears and the Meter beeps.
Press and hold for over 1 second to
continuous store reading, MEM blinks
and the Meter beeps.  The index number