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 122
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… … The Evershed Testing Set. This simple testingoutfit, Fig. 69, consists of an ohmmeter and a hand 100 ELECTRICAL INSTRUMENTS. generator. To test an insulation or other resist-ance, all that is required is to connect the resist-ance to the binding posts, turn the generatorhandle and read the…
Electric testing · Electric apparatus and appliances
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