Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)
Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 121
Fig. 07. In operation the resistance to be measured isconnected to posts A and D. The telephone isheld to the ear and the battery key on the tele-phone is closed. The stylus is tapped at variouspoints on the rheostat wire until no sound is heard … Fig. G8. in the telephone, the resistance being measured willbe found in the figures at the point of stylus con-tact, where no sound was obtained. The numbers are to be read in that color corre- PORTABLE TESTING SETS. 99 sponding to the plug socket in use. If the plugis in a red hole, read the red…
Electric testing · Electric apparatus and appliances
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
