UNI-T UT219P User Manual page 8

if the measured conductor is not placed at the center of the clamp jaws. The clamp can only
measure a current conductor at a time, if it measures two or more current conductors at the
same time, the reading will be incorrect.
3) Press SELECT to cyclically read active power, apparent power, reactive power, power factor,
and phase angle, as shown below:
Short press Short press
Main display: Active power Main display: Apparent power Main display: Reactive power
Auxiliary display 1: Power factor Auxiliary display 1: Power factor Auxiliary display 1: Power factor
Auxiliary display 2: AC voltage Auxiliary display 2: AC voltage Auxiliary display 2: AC voltage
Auxiliary display 3: AC current Auxiliary display 3: AC current Auxiliary display 3: AC current
Short press
Main display: Phase angle
Auxiliary display 1: Active power
Auxiliary display 2: AC voltage
Auxiliary display 3: AC current
Note:
Phase angle is in reference to voltage.
Do not input voltage over 1000Vrms. It is possible to measure higher voltage, but it may
damage the clamp.
Avoid electric shock when working with high voltage.
Disconnect test leads with the measured circuit after all measurement operations are completed.
The high voltage warning symbol " " will appear on the LCD if the measured voltage is over
30V AC; the red backlight flashes if the measured voltage is over 1000VAC.
Do not release the trigger abruptly when pressing and holding it. Hall sensor is sensitive to
magnet, heat and mechanic stress, impact can cause reading variation in a short time.
To ensure measurement accuracy, please place the measured conductor at the center of the
clamp jaws. Error of ±1.0% of reading will be produced if the measured conductor is not placed
at the center of the clamp jaws.
Incorrect wire connection will cause negative active power and cause the red backlight to
flash, please check if the connections of voltage input terminal and clamp jaws are correct.
4. 3-phase power measurement
Wire connection interface:
The places of clamp jaws, black test lead and red test lead are shown in the figure below.
Black test lead
4.1 3-phase 3-wire (3P3W) balanced mode (Fig. 8)
Red
L1/R/A
Black
L2/S/B
L3/T/C
AC 3-phase 3-wire power measurement (3P3W balance)
Fig. 8
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UT219P User Manual
Short press
Main display: Power factor
Auxiliary display 1: Active power
Auxiliary display 2: AC voltage
Auxiliary display 3: AC current
Short press
Clamp jaws
Red test lead
UT219P User Manual
1) Connect red test lead (connected with red alligator clip already) with "V" terminal; and black
(connected with black alligator clip already) with "COM".
Δ
2) Set the rotary switch to "3PW", press " / 3P3W " to select 3P3W balance mode, then the
clamp enters wire connection interface, as shown below:
"L1" on top right corner indicates the jaws clamp L1 live wire, "L2" on bottom left corner
indicates test lead from COM terminal connects with L2 live wire, "L1" on bottom right corner
indicates test lead from V terminal connects with L1 live wire. The finger symbol on "HOLD"
segment flashes to indicate pressing "HOLD" button to enter measurement interface.
3) According to the wire connection interface (Fig. 8), clamp L1 live wire, connect L1 live wire
with test lead from V terminal, and connect L2 live wire with test lead from COM terminal,
then press "HOLD" button to enter measurement interface.
4) In measurement interface, press SELECT button to cyclically read active power, apparent
power, reactive power, power factor and phase angle, as shown below:
Short press Short press
Main display: Active power Main display: Apparent power Main display: Reactive power
Auxiliary display 1: Power factor Auxiliary display 1: Power factor Auxiliary display 1: Power factor
Auxiliary display 2: AC voltage Auxiliary display 2: AC voltage Auxiliary display 2: AC voltage
Auxiliary display 3: AC current Auxiliary display 3: AC current Auxiliary display 3: AC current
Short press
Main display: Phase angle
Auxiliary display 1: Active power
Auxiliary display 2: AC voltage
Auxiliary display 3: AC current
4.2 3-phase 4-wire (3P4W) balance mode (Fig. 9)
Red
L1/R/A
L2/S/B
L3/T/C
Black
N
AC 3-phase 4-wire power measurement (3P4W balance)
Fig. 9
Short press
Main display: Power factor
Auxiliary display 1: Active power
Auxiliary display 2: AC voltage
Auxiliary display 3: AC current
Short press
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