SCALES FOR ANALOGUE ELECTRICAL MEASURING INSTRUMENTS

SKALE KOD ANALOGNIH ELEKTRIČNIH MERNIH INSTRUMENATA SCALES FOR ANALOGUE ELECTRICAL MEASURING INSTRUMENTS Author: Radoje Jankovic Znamo da najveći broj vas nije imao prilike da vidi mnoge analogne instrumente za merenje raznih električnih veličina, pa smo se zato i odlučili da ovu kratku  lekciju posvetimo toj temi a kasnije ćemo je malo detaljnije obraditi. Skala električnog […]

Measuring Internal Electrical Resistance of DC Voltmeter.

Author: Radoje Jankovic Accessories:  1. Folding analog voltmeter to the hate DC voltage, range: 0 – 40 V.  2. Digital or analog universal instrument or ohmmeter.  3. Measuring wires. Remove the casing from a voltmeter as seen in the pictures. If you have no experience with precise instrument, do not open the instrument, because otherwise you’ll probably damaged permanently.  Internal resistance […]

Active power measurement using a DC wattmeter

Author: Radoje Jankovic Figures from Jankovic documentation The pictorial view of active power measurement is shown in left figure. For this purpose is used a standard analog wattmeter. The right upper figure shows the wattmeter circuits connected for power measuring in a bank of incandescent lamps. The right lower figure is standard electrical circuit for […]