The product is a multifunctional power analyzer with single phase and three phase instantaneous variable measurement functions, including W, Wdmd, var, vardmd, VA, VAdmd, PF, PFavg, V, AL, An, Hz, THD (maximum and minimum values for all measurements); measured energies include kWh and kvarh (4 quadrants); load curve can be displayed graphically (daily, weekly, monthly display).
The WM4-96 is a modular universal utility meter and power analyzer that can measure energy, water, and gas in single, dual, or multi‑time modes. It supports direct power‑quality measurements, indirect energy measurements via watt‑hour meters, and optional gas and water metering management. The device includes optional RS‑422/485, RS‑232, pulse and alarm outputs, and MODBUS RTU/JBUS communication.
The manual covers hardware specifications, input and output configurations, software functions (Wm4Soft Network and Remote), data logging, harmonic analysis, and installation requirements. It also provides programming details, password protection, and environmental ratings such as IP65 front protection and operating temperature ranges.
| Power supply range | 18‑60 VAC/VDC, 90‑260 VAC/VDC |
|---|---|
| Front protection rating | IP65 |
| Display resolution | 128 × 64 dots |
| Sampling frequency | 6400 samples/s @50 Hz |
| Memory size | 2 Mbyte |
| Dimensions (front) | 96 × 96 mm |
| Weight | ≈ 600 g |
| Operating temperature | 0 °C to +50 °C |
It supports MODBUS RTU, JBUS, and optional RS‑422/RS‑485 or RS‑232 serial interfaces.