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RBB Series Resistance Decade Boxes

  •  4, 5 and 6 Decades Available
  • Total Range 11.111 MOhm 
  • Smallest Steps 0.001Ohm
  • Special Waidner Wolff Decade Minimises Switch Contact Resistance 
  • Accuracy 0.05% for premium dials
  • Resistance Coils Wound in Selected Low TC Wire
  • Special Models for Pt100 Simulation
  • Special Model for Insulation Simulation
Resistance Decade Boxes By CROPICO
Combining high quality, long life and permanence of calibration, the RBB Series offers an unbeatable selection of models. The reliability is built in as we use our own designed and manufactured switches combined with high quality wire wound resistors. All units are supplied complete with certificate of conformity and all measurements are of course traceable to International Standards
  • Special models are available for temperature (Pt100) and insulation resistance simulation.

    • Specification

    Model
    Number of Decades 
    Total Resistance
    Resolution
    Residual Resistance
    Size 
    Weight
    RBB4-A
    4
    1,111 W
    0.1 W
    0.01 W
    310x100x140
    2.7 kg
    RBB4-B
    4
    11,110 W
    1 W
    0.01 W
    "
    "
    RBB4-C
    4
    111,100 W
    10 W
    0.01 W
    "
    "
    RBB5-B
    5
    1,112.1 W
    0.01 W
    1 W
    384x100x140
    3.4 kg
    RBB5-C
    5
    11,111 W
    0.1 W
    0.012 W
    "
    "
    RBB5-D
    5
    111,110 W
    1 W
    0.012 W
    "
    "
    RBB5-E
    5
    1.1111 MW
    10 W
    0.012 W
    "
    "
    RBB5-F
    5
    11.111 MW
    100 W
    0.012 W
    "
    "
    RBB6-B
    6
    1,112.11 W
    0.001 W
    1 W
    450x100x140
    3.85 kg
    RBB6-C
    6
    11,112.1 W
    0.01 W
    1 W
    "
    "
    RBB6-D
    6
    111,111 W
    0.1 W
    0.013 W
    "
    "
    RBB6-E
    6
    1.11111 MW
    1 W
    0.013 W
    "
    "
    RBB6-F
    6
    11.1111 MW
    10 W
    0.013 W
    "
    "

     Accuracy
     
    Decade (Ohms)
    Accuracy of Adjustment Incremental Steps
    Power Rating
    Temperature Coefficient
    10 x 1 MW
    ± 0.1%
    0.5 W
    10 ppm/ºC
    10 x 100 kW
    ± 0.1%
    0.5 W
    10 ppm/ºC
    10 x 10 kW
    ± 0.05%
    0.33 W
    3 ppm/ºC
    10 x 1 kW
    ± 0.05%
    0.33 W
    3 ppm/ºC
    10 x 100 W
    ± 0.05%
    0.33 W
    3 ppm/ºC
    10 x 10 W
    ± 0.05%
    0.33 W
    3 ppm/ºC
    10 x 1 W
    ± 0.2%
    0.33 W
    3 ppm/ºC
    10 x 0.1 W
    ± 0.5%
    0.75 W
    10 ppm/ºC
    10 x 0.01 W
    ± 1%
    0.75 W
    10 ppm/ºC
    10 x 0.001 W
    ± 2%
    0.75 W
    10 ppm/ºC
    10 x 0.0001 W
    ± 10%
    0.75 W
    10 ppm/ºC

    Instrument selection
     

    Last modified April 2006.
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