UT219PV User Manual
16
/
27
1) Set the rotary switch to “
”. When the flex current sensor is connected, the Clamp Meter will
automatically switch to corresponding measurement range, and “CS” and the symbol of
corresponding range will be displayed.
2) Press and hold the trigger to open the clamp jaws, clamp the conductor to be measured, then
release the trigger slowly to close the clamp jaws completely.
3) Read the measurement result from the LCD (Main display: True-RMS current; Sub-display:
Frequency)
4) At ACA (clamp jaw)/flex current sensor measurement position, short press the INRUSH button to
enter the AC inrush and peak measurement function. Instantaneous current at startup of electric
appliances can be measured. The inrush current is the maximum current for an integral of 100 ms.
Short press the INRUSH button again to exit the inrush and peak measurement function. As shown
in the Figure below.
5) At ACA (clamp jaw)/flex current sensor measurement position, long press the INRUSH button to
enter the ACA-LPF measurement function. The composite signal generated by the inverter or
variable-frequency motor can be measured. Long press the INRUSH button again to exit the
ACA-LPF measurement function. As shown in the Figure below.
ACA-LPF
Warning:
● Please measure one current conductor only at a time. Otherwise the measurement result will be
incorrect.
● To ensure an accurate measurement result, please set the measured conductor at the center of the
clamp jaws. Otherwise an additional error of ±1.0% will be produced.
● When monitoring the in-circuit frequency at AC current measurement position, the amplitude shall
meet the requirements below:
