Lascar Electronics, Inc. Meters DPM 970

The DPM 970 is a digital AC voltmeter module featuring a 3¬O digit LCD display with a digit height of 19mm (0.75 inches) and LED backlighting. It is designed to measure true RMS voltage and current, with a full-scale reading of 500V AC (2kV) and 2mA as standard. The module allows for measurement of various AC voltages and currents by changing scaling resistors or adding a shunt. Calibration is facilitated through two multi-turn potentiometers for offset and scale adjustments. The device connects via screw terminals and is housed in a robust carrier suitable for bolting or panel mounting. The DPM 970 includes a digital hold function to freeze the last displayed reading, enhancing usability in various applications. The operating temperature range is from 0°C to 50°C, with an overall accuracy of ±1.5% (±2 counts). It supports a sample rate of 3 samples per second and has an input impedance of 1 MΩ for the 2kV range. The module requires a DC supply voltage between 7.5V and 14V, with a typical current draw of 1.5 mA (50 mA with backlighting on). Engineers should consider the DPM 970 for applications requiring reliable voltage and current measurements in a compact and user-friendly format.