The GW Instek GPM-8330 is a three-channel, digital power meter with LAN/USB/RS-232 communication interfaces. The GPM-8320/8330 series meters are designed specifically for measuring power in three-phase AC power sources, making them suitable for most electrical and electronic product testing applications (GPM-8320 provides 2 channels, and GPM-8330 provides 3 channels). The modules have a testing bandwidth of DC, 0.1Hz to 100kHz, and feature 16-bit A/D converters and a sampling rate of 300kHz. They are equipped with a 5-inch TFT LCD display, 5 digits of measurement readings, 25 different power measurement parameters, and high-precision measurement capabilities. GPM-8320/8330 also features waveform display capabilities (voltage/current/power), the integration measurement function, harmonics measurement and analysis of multiple orders, external sensor input terminals, and a variety of communications interfaces.