P.O. Box comprises three pair of
ratio
coils of 10, 100 and1000 ohms and 16 series coils. Total 11110 ohms.
Two tapping
keys are provided for battery and galvanometer.
Standard Quality
a) Manganin Coils, Accuracy: Ratio
coils 0.05%, others 0.1%
b) Precision Quality, Constantan
Coils, Accuracy: Ratio of Coils 0.02%, others
0.05%
c)
Educational Quality, Constantan Coils, Accuracy: Ratio of Coils
0.1% and others 0.2%
