描述 Description

Murata Power Solutions’ new DMR20-1-FM is the world’s smallest, self-powered, ac linefrequency monitor. Simply connect 85 to 264Vac (45-65Hz) power and the meter is fullyoperational—no additional components are required. The unit can also measure distorted120Vrms power sources with triangle and square waveforms, as well as quasi sine waveoutputs of dc to ac power inverters.An ultra-stable, quartz-crystal controlled microprocessor provides accuracies of ±0.02Hzover the operating temperature range of -25 to +60°C. DMR20-1-FM frequency monitorsfeature a large, 0.30”/7.6mm, bright LED display that can be easily read from 10 feetaway (3 meters). A built-in resettable fuse and out-of-range indication assures long termreliability.The DMR20-1-FM is housed in a rugged, round polycarbonate case that provides excellentprotection against moisture, dust, shock and vibration. Panel installation is straightforward:using available tooling, simply drill and punch a 1.2 inch (30.5mm) diameter hole andanti-rotation notch, insert the meter and gasket, and securely fasten the meter using thesupplied hex nut. The nut and gasket are designed to provide moisture ingress protection toIP67/NEMA 6.DMR20-1-FM is exactly the same size as Murata Power Solutions’ DMR20-1-ACV (ac volts),DMR20-10-DCM (dc volts), and DMR20-1-TMP (temperature) digital panel meters.