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14
5
Key function
POWER
Press
POWER
key for a long time for bootstrap and restore function gear during
previous power-off automatically after bootstrap. Press the key for a short time under
bootstrap status for power-off.
HOLD(UT241)
Press the key for a short time to keep display data;
HOLD/LIGHT(UT242/243)
Press the key for a short time to keep display data or press backlight ON/OFF key for a long
period.
MENU
Function menu selection key: Please select active power (kW)+voltage(V)+current(A),
apparent power (kVA)+voltage(V)+current(A), inactive power(kVar)+voltage(V)+current(A),
power factor (COS
)+voltage (V)+ current(A), reverse power factor (SIN
)+voltage(V)
+current(A), phase location angle(
)+voltage(V)+current(A), frequency(Hz)+voltage(V)
+current(A), electric energy(kWh)+active power(kW)+statistic period and phase sequence
judgment in sequence. (Only UT243 has this function.)
HARM
Press the key for a short time to enter into harmonic measurement mode with switchover
circulation for total voltage harmonics to total wave distortion rate, total voltage harmonics to
fundamental wave distortion rate, voltage harmonics, total current harmonics to total wave
distortion rate, total current harmonics to fundamental wave distortion rate and current
harmonics.Press the key for a long time to alter harmonic frequency mode temporarily under
harmonic mode for invalidation after power-off.
LIGHT(UT241)
Press backlight ON/OFF key for a long time.
USB
UT242/UT243
Press USB communication ON/OFF key for a long time.
LOAD
Press LOAD key for a short time once to enter into single LOAD data status and
press it again to exit LOAD status.
Press LOAD key for a long time to enter into continuous circulation LOAD data status
and press it again to exit LOAD status.
SELECT
Phase A, B & C and total phase power selection key
SAVE
Press the key for a short time once to record data.
To record data continuously when pressing SAVE key for a long time and press it for a
short time to exit continuous SAVE status.
LCD will display FULL symbol to show that RAM is full of data when displaying data save
quantity of 999. Next group of data cannot be saved until pressing CLEAR key for a long time
to eliminate data in RAM.
/CLEAR
Press
key for a short time during measurement in active power/apparent
power/inactive power function gear to calculate and save power for the 1st phase of
currently measured measurement result. Measure the 2nd phase of power and press
key again to calculate and save the 2nd phase of data power. Measure the 3rd
UT241/242/243 OPERATING MANUAL
UT241/242/243 OPERATING MANUAL
