UNI-T UT219P User Manual Download Page 12

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THD %f

Main display: THD %f
Auxiliary display 1: Frequency
Auxiliary display 3: True RMS
of THD current

Main display: THD %r
Auxiliary display 1: Frequency
Auxiliary display 3: True RMS
of THD current

Analysis of component

of 30th harmonic

THD %r

Main display: Harmonic ratio
of component of 30th harmonic
to fundamental wave
Auxiliary display 1: Frequency
Auxiliary display 2: Prompt of
analyzing 30th harmonic
Auxiliary display 3: True RMS
of component of 30th harmonic

5.2 Voltage harmonic analysis (Fig. 5)

1) Connect red test lead (connected with red alligator clip already) with “V” terminal; and black
(connected with black alligator clip already) with “COM”.
2) Set the rotary switch to “HARM”, press SELECT button to select AC voltage harmonic
analyzing, then connect alligator clips with power source or load to be measured in parallel.
3) Press “ ” or “ ” to read THD %f, THD %r, RMS of harmonic component of each order ,
and harmonic ratio of harmonic component of each order to fundamental wave, for examples:

THD %f

THD %r

Analysis of component

of 30th harmonic

Main display: THD %f
Auxiliary display 1: Frequency
Auxiliary display 3: RMS of
THD voltage

Main display: THD %r
Auxiliary display 1: Frequency
Auxiliary display 3: RMS of
THD voltage

Note:

  Do not input voltage over 1000V. 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.
  If zero crossing of harmonic does not meet the zero-crossing condition of fundamental wave
  signal for multiple times, harmonic analysis can be performed by using the mode of setting
  fixed frequency.

UT219P User Manual

6. Set the mode of electric energy accumulation (Fig. 12)

Red

Black

Power supply

Single-phase active electric energy measurement

Load

1) Set the rotary switch to “Wh/Setting”, press SELECT button to select the mode of electric
energy accumulation, the setting parameters are shown as below:

Setting value

No value
(time accumulation)

3200 cyc./1kWh

1600 cyc./1kWh

1200 cyc./1kWh

1000 cyc./1kWh

600 cyc./1kWh

500 cyc./1kWh

Serial
No.

oFF

Change the
setting value
Yes:

√

No: —

—

√

Serial No.

0.10kWh

0.05kWh

0.01kWh

Setting value

300 cyc./1kWh

250 cyc./1kWh

150 cyc./1kWh

125 cyc./1kWh

0.10kWh

0.05kWh

0.01kWh

Change the
setting value
Yes:

√

No: —

Press “ ” or “ to change the serial No. of main display. When the setting value can be

”

changed by selecting serial No., press “HOLD” to select the part to be changed (auxiliary 2,
auxiliary 3), then press “MAX MIN” to select ones place, tens place, hundreds place and
thousands place of the value in auxiliary display 2. Press “ ” or “ to change partial values.

”

After the setting is changed, press “SELECT” to enter the mode of measuring electric energy
accumulation.

Note: The changed setting will be saved in the clamp.

2) Connect alligator clips with power source or load to be measured in parallel, and clamp the
  conductor to be measured, the current flow from up to down (up: front; down: bottom cover),
  then release the trigger slowly until the clamp jaws close completely. Please make sure that
  the measured conductor centers at the clamp jaws, error will be produced 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) In measurement interface of electric energy accumulation, press “HOLD” to start or stop
accumulating electric energy.
Measurement interface of time accumulation of electric energy (Serial No.: OFF)

Fig. 12