Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 332
Figure 196 nected as shown in Figure 197. The sum of the stand-ard meter readings should equal the reading of themeter being tested. In this case it is not necessary tobalance the load. … Figure 197 It is of great importance for accurate testing that agood stop watch be employed, although for approxi-mate tests the second hand of the ordinary watch servesthe purpose quite well. The longer the time of thetest, using the latter method, the less the error. Recording Wattmeters 331 When…
Electrical engineering · Electric testing
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