Description： * Measurement range (no cooperate with the external PT) :
ACV : 0 to 600 ACV, 40 to 400 Hz.
* True rms for ACV measurement.
* Voltage input can cooperate with the external PT (voltage transformer) to expend the
measurement range. The PT range can be adjusted with default.
* Control setting, Hi/Lo alarm setting.
* Control relay output, alarm relay output.
* Power : 90 ACV to 264 ACV, 50/60 Hz.
* RS232/USB computer interface.