Moving-coil measuring instruments
for direct current and direct voltage
Moving-coil measuring instruments for direct current and direct voltage
Moving-coil measuring instruments serve for measuring direct current and direct voltage. For extending the measuring range, shunts, series resistors or voltage dividers are used. The energy consumption of moving-coil measuring instruments is very low; they may thus be connected to shunts, speed sensors, thermocouples, measuring transducers or similar.
Moving-coil measuring instruments are manufactured according to EN 60 051 as well as according to the other relevant VDE and EN regulations. The accuracy amounts to 1.5 % referred to the full scale. When adjusting moving-coil measuring instruments for their connection to shunts, an input lead resistance of 0.06 Ω is principally accounted for, this corresponds to an input lead of 1.3 m, 2 x 0.75 mm2. The measuring elements are mounted in a shock-resistant housing from polycarbonate. The housing dimensions comply with DIN 43 880 for built-in equipment for electrical installations. Connection is made to touch-proof captive M5 screws (max. 10 mm²).