A Dual Range Voltmeter (Type EDM-80) is a precise moving coil DC meter designed for laboratory use and physics demonstrations. It allows users to measure electrical potential differences across two distinct sensitivity levels, typically switched by selecting different input terminals.
Core Technical Specifications
- Accuracy: Maintains a precision level of 2.5%.
- Scale Design: Features a 60mm analog scale protected by a clear acrylic front cover.
- Build: Fully enclosed in a sturdy, often ABS plastic case.
- Dimensions: Standard size of 125 x 80 x 80 mm.
- Adjustments: Includes a visible zero adjustment screw to ensure calibration before measurements.
Usage and Connectivity
- Parallel Connection: Always connected in parallel with the component being measured.
- Terminals: Typically uses three 4mm color-coded terminals (one common negative and two range-specific positive sockets)
- Applications: Ideal for demonstrating Ohm's Law, series/parallel circuit behaviour, and internal resistance of cells in educational settings.
Product of Inida