Sensitivity characteristics of a low-frequency bridge network

I. M. Stein: It seems to me that the method and apparatus described accomplish two things. First, the bridge circuit and the type of detector used permit of a great precision of balance; that is, the quantity being measured may be measured precisely enough to give the accuracy desired in locating the open circuit. Then, having a set-up which gives the desired precision, we have two options. One is to chart each long cable by putting “opens” at certain known places and making measurements; the other is to get rid of the non-linear characteristic so that no charting is necessary.