Ammeters

Measurements of very Large Currents by Thermocouples

Measurements of very Large Currents by Thermocouples: Measurements of very Large Currents by Thermocouples – Thermocouples instruments with heaters large enough to carry very large currents may have an excessive skin effect. Ordinary shunts cannot be used because the shunting ratio will be affected by the relative inductance and resistance, resulting in a frequency effect. …

Measurements of very Large Currents by Thermocouples Read More »

DC Ammeter

DC Ammeter: DC Ammeter – The PMMC galvanometer constitutes the basic movement of a dc ammeter. Since the coil winding of a basic movement is small and light, it can carry only very small currents. When large currents are to be measured, it is necessary to bypass a major part of the current through a …

DC Ammeter Read More »