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Department All Physics Items
| Usage | : This bridge is very suitable for the use of wires and cables manufacturers. It is being extensively used for finding the resistance of transformer windings, contact resistance of relays etc. |
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| Basic Structure | : Terminals for battery, galvanometer, current and potential terminals are all provided on the bakelite panel enclosed in a teak wood box. |
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| Range of Measurement |
: The bridge has a range of 0.2 micro ohm to 11ohms. | |
| Range Multiplying | Least | Factor Count |
| 2 Milli ohm to 11 ohm | x 100 | 2 Milli ohm |
| 0.2 Milli ohm t o 1.1 ohm | x 10 | 0.2 Milli ohm |
| 20 Micro ohm to 11 ohm | x 1 | 20 Micro ohm |
| 2 Micro ohm to .011 ohm | x 0.1 | 2 Micro ohm |
| 0.2 Micro ohm to .0011 ohm | x 0.1 | 0.2 Micro ohm |
| Maximum Current | : 10 amperes intermittently and 5 amperes continuously. | |
| Accuracy | : + 0.05% + 1 small division of the slidewire. | |
| Multiplying Ratios | : A rotary switch furnishes 5 multiplying ratios of x100, x10, x1, x0.1 and x0.01. | |
| Standard Resistance | : There are 10 coils of 0.01 ohm each arranged on a rotary dial plus a circular slidewire of total resistance 0.01 ohm and 500 sub-divisions. Each sub-division is equal to 0.00002 ohms on the normal range. |
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| Current Reversing Switch | : A battery reversing switch is provided to reverse the current in the bridge to eliminate thermal effects. |
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| AP-672B(ii) | INDUSTRIAL KELVIN BRIDGE Same as above but with an additional range factor of x1000 to give the range of measurement as 0.2 micro ohms to 110 ohms. |
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| ACCESSORIES OF INDUSTRIAL KELVIN BRIDGE | ||
| AP-672-C | ADJUSTABLE D.C. CURRENT SOURCE | |
| Basic Structure :The unit consist of a variac, a step down transformer | ||