LEEM-20 Electric Meter Modification and Calibration Experiment (Milliammeter)

Experiments
1. Ammeter modification and calibration;
2. Modification and calibration of voltmeter;
3. Modification and design of ohmmeter.

The main technical parameters
1. Pointer type refitted meter: measuring range 1mA, internal resistance about 155Ω, precision 1.5;
2. Resistance box: the adjustment range is 0～11111.0Ω, and the accuracy is 0.1 level;
3. Standard ammeter: 0～2 mA, 0～20mA two ranges, three and a half digital display, accuracy ±0.5%;
4. Standard voltmeter: 0～2V, 0～20V two ranges, three and a half digital display, accuracy ±0.5%;
5. Adjustable stabilized voltage source: output 0～2V, 0～10V two gears, stability 0.1%/min;
6. Users who need it can increase the two-way protection of the meter head, so that the needles will not be damaged!