Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 380
ent. When M is 1 ohm and iVis 1000 ohms, measurementsof resistance as small as .001 ohm may be made with the required 343 48 ELECTRICAL MEASUREMENTS accuracy. Bridges are usually arranged with a reversing key sothat M and N may be interchanged; hence M could be 1000 and N1, and measurements of… … Fig. 52. Portable Dial Type Testing SetCourtesy of Leeds and Northrup Company, Philadelphia is illustrated in Fig. 52. The rheostat of the bridge is made up offour dials, the one marked units, Fig. 53, consisting of a series often 1-ohm coils, the second marked tens consisting of a series often…
Electrical engineering
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