Precision Resistance Decade and Calibrator
Model 1405 (and Model 1406, 1407)

• Range 1406
  10 mΩ to 100 kΩ
• Range 1407
  100 mΩ to 1 MΩ
• Range 1405
  10 mΩ to > 3 kΩ
• Accuracy
  1405/06/07: 0.01 %
• Temperature coefficient
  1405/06/07: < 2 ppm/K
• Stability
  < 0.01 %

Application

The field of application of the precision decade model 1406/07 reaches from general precision measuring to simulation of a variety of measuring transducers, such as for example strain gage transducers, resistance thermometers, hygrometers and others.

The model 1405 tests and calibrates quickly and easily displays, in control and process technology which is working on a resistance thermometer basis.

Description

The decade resistors are wire-wound resistors and consist of low-capacity and low-conductivity wire coiling made of ZERANIN®. An especially developed precision stepping switch with highquality contact materials and optimal brush construction guarantees very good reproducibility.

As regards accuracy, stability and reliability, the decades model 1406/07 are designed to meet high-standard requirements.

The design of the decade model 1405 enables its use not only as precision decade resistor but also precision calibrator for all standard commercial thermometers. Two fixed series resistors of 1 kΩ serve the simulation of Pt 1000 and Pt 2000 resistance thermometers. The four connection sockets provide the possibility of simple simulation of resistance thermometers operated in four-wire technology.