Portable Wheatstone Bridge |
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| Portable Wheatstone Bridge
(1128 C) |
General : This bridge is fully portable with a built in sensitive galvanometer and a dry battery.
Series Arm : There are 4 decades of 10 x 1, 10 x 10, 10 x 100 and 10 x 1000 ohms.
Range of Multipliers : A single rotary switch furnishes 7 range multipliers of x 1000, x 100, x 10, x 1, x 0.1, x 0.01 and x 0.001.
Battery : A built in dry battery of 4.5 V. There is a provision for using external battery for masuring high resistances.
Galvanometer: A delux galvanometer of MR 100 model, with sensitivity 10 microamperes / div. Is used.
Push Buttons: Two push buttons for battery and galvanometer are provided.
Accuracy: Both series and ratio coils are adjusted to an accuracy of better than 0.05%.
Overall accuracy of measurements is better than ± 0.1%.
A) Constantan Coil : Accuracy ± 0.1%.
B) Manganin Coil : Accuracy ± 0.02%.
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