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High Precision Decade Resistance Box

TYPE: 7400

High Precision Decade Resistance Box Type – 7400 has been designed and fabricated to meet the standard calibration requirements.

This Decade Resistance Box can serve the purpose of Precision Resistance Calibration Standards in components manufacturing industries for components comparisons in quality control and instrumentation laboratories for calibration of process control instruments, thermocouples, RTDs, temperature indicators and in engineering laboratories for resistance simulation and instrument calibration.

To meet the stringent accuracy, stability and reliability requirements, the Manganin wires have been used to construct resistors of accuracy 0.05% respectively. Further the gold plated switches have been employed in the best grade of Decade Resistance Box to provide very low contact resistance with drift-free values upto 2,00,000 operations. The economical models carry silver alloy and brass switches with silver plating providing 1,00,000 operations of drift-free values.

 Types : Silver-to-Silver or Gold plated Switches  and Terminals
 Construction : Portable in metallic cabinet
 Function : Calibration Resistance Standard
 Resistance Range : 0.01 ohm to 100 Kohm in seven decades
 Switch Resistance : 0.002 ohm per switch
 

Accuracy and Related Parameters

Decade Resistance per step Total Resistance on decade dial Accuracy Max. Current Power per step in Watt
 First 0.01 ohm   0.1 ohm   +/-2%   4 A   0.16  
 Second 0.1 ohm   1.0 ohm   +/-0.5%   1.6 A   0.25  
 Third 1.0 ohm   10.0 ohm   +/-0.05%   800 mA   0.60  
 Fourth 10.0 ohm   100.0 ohm   +/-0.05%   250 mA   0.60  
 Fifth 100.0 ohm   1.0 K. ohm   +/-0.05%   80 mA   0.60  
 Sixth 1.0 K. ohm   10.0 K. ohm   +/-0.05%   23 mA   0.60  
 Seventh 10.0 K. ohm   100.0 K. ohm   +/-0.05%   7 mA   0.50  
  Total Available Resistance : 111.1111 K. ohm
We, At Vaiseshika, offer our customers customized Decade Resistance Boxes with minimum four dial configuration as per customers’ range of resistance Value.
We also undertake to manufacture hybrid Resistance Boxes with low & high value Decade Dials from 0.001 Ohm to 1 TOhm.
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