You can not use LabVIEW and WTviewer to communicate with the PC using same USB driver.
The USB driver for LabVIEW and the USB driver for WTviewer is different.
Yokogawa's YKMUSB driver is used by WTviewer (Microsoft language applications).
NI-VISA driver is used by LabVIEW( NI language applications).
You can not use our YKMUSB with LabVIEW, and you can not use the NI-VISA driver with WTviewer.
You must change the USB driver, when you use WTViewer after LabVIEW, and when you use LabVIEW after WTviewer.
Please refer to the attached document for the procedures for changing the USB driver.
With 0.02% accuracy and 1MHz bandwidth, the WT3000 delivers where the highest precision measurements are required. It is the industry standard for R&D work on inverters, motor drives, lighting systems and electronic ballasts, UPS systems, aircraft power, transformer testing, and other power conversion devices.
The High-end WT1600 is designed for a wide range of applications, from energy-saving to large load applications. The WT1600 has a six element input capability to provide maximum flexibility, and Basic Power Accuracy of 0.1% with 1 MHz Bandwidth.
The WT1800 Power Analyzer offers maximum flexibility with up to six wattmeter elements, high bandwidths, simultaneous high speed digitizing, and wide voltage and current ranges. Although this model is still available, the newer WT1800E offers higher accuracy.
The WT500 Power Analyzer excels at single-phase and three-phase power measurements. Standard features include a color TFT display and USB interface for communications and memory. The instrument has a basic power accuracy of 0.1%, maximum inputs of 1000 V, 40 A and a measurement bandwidth of DC to 100 kHz.
A Digital Power Analyzer is an instrument for research & development, design validation, and manufacturing test used to accurately measure electrical power characteristics.