Bridge R-329

 Bridge R329
Bridge R329 - patiekalai single-double bridge, designed for accurate measurement of resistance.

Accuracy class:
- double bridge: 1,5; 0,5; 0,1; 0,05;
- single axle: 0,05; 0,5.
Measurement range:
- double bridge: 0,000001 Om - 0,00001 Ω; 0,000010001 Ohm 0.0001 Ohm; 0,00010001 Ohm 0.001 Ohm; 0,0010001 Ohm 100.0 Ohm;
- single axle drive: 50om - 100000om; 100010om - 111110Ом.

Structural features of R329

Bridges R329 is made of separate units, mounted on cast silumin the Board, which is installed in a wooden enclosure. Dimensions the housing 520×330×240mm. Panel decade switches and plug pads made of plastic. For protection from contamination the decade switches are closed by plastic caps, mounted on the switch panel.
All resistance R329, except for the resistances of the younger decades and resistance 0.001 Ohm built-in unit of sample resistances, done on a porcelain frame. The resistance of 0.001 Ohm is made of manganin sheet (tape). The exemplary unit of resistance is removable and interchangeable. Resistance unit can be used as an independent model of resistance class 0.02. To each bridge are attached five flexible conductors resistance ≤0.001 Ohm each and special pad with two double clamps to measure short lengths of wire resistances. All measuring the resistance of the bridge can be calibrated, element by element, for which the contacts of the switches there is a special socket to (the device included are two flexible conductor, each with tip and plug.

Specifications R329

Bridge R329 - combined; the same decade resistance, and measuring resistance are used to construct schemas single bridge and double bridge scheme. Comparative shoulders of the bridge R1 and R'1 have one hundred and five decades: 10×100, 10×10, 10×1, 10×0,1 and 10×0.01 Ohm, which allows the reference resistance reference leg with the repeat accuracy of ±0,0005%. Every decade for easy adjustment and item verification is the total number of resistors with a nominal values that are multiples of 10. A zero-resistance reference leg is not exceed 0.005 Ohms. The variation of this resistance is not more than 0.0005 Ohms.
The first stage younger decades reference leg is fitted with the zero resistance, which further increases measurement accuracy for the bridge.
Comparative shoulder R1 is used in the circuits of single and double bridges, shoulder R'1 only in the double bridge circuit. Resistance shoulders relations R2 and R3 have the same value for 10ω, 100ω, and 1000om 10000Ом.
Block resistance is only exemplary in a double bridge to measure maroondah resistance on chetyrehstennoy scheme inclusion. A diagram of the bridge allows for measurements maroondah resistance use as either internal or external to the exemplary resistances.
Measurement of resistance from 10-6th to 100ω using built-in sample resistances is performed in the following way. Current clamp the measured resistance RX is connected with clip T1 unit exemplary resistance of a copper jumper with a resistance of not over 0.001 Ohm thoroughly cleaned tips. Potential leads the measured resistance connected to the terminals XA with respect polarity, resistance to them must also be no more than 0.001 Ohms.

In stock - 2pcs.