Cropico RBB

High accuracy decade box with versatile wide ohm range

  • Total Range 11.111MΩ
  • Accuracy 0.05% for premium dials
  • Smallest Steps 0.001Ω

 

Cropico RBB
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Cropico RBB

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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.

Cropico RBB
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to Request a Quote

 

specification1

specification2

Dimensions
Calibration certificates including UKAS traceable are available
on request
Switches
Contact material gold plated brass
Contact resistance = 5 Mega ohm
Insulation Resistance (all paths = 10 giga ohm)
Proof voltage 1kV
Resistors

Temperature Co-efficient:
3ppm / +20C to +85C 5ppm maximum over 55C to
+ 125C 0.1, 0.01, and 0.001 dials 10ppm/C

Full Load Stability:
35ppm/10,000 hours
50ppm/26,000 hours

No Load Stability:
25ppm/10,000 hours
35ppm/26,000 hours

Over full temperature range:
-50C to +125C

Power Rating:
0.33 watt (+85C) 0.25 watt (+110C)

Maximum Continuous Working Voltage:
Up to 250V dc

Noise:
Essentially non-measurable <1.5 mV/C
Thermal E.M.F:
<0.4mV/C typical

Encapsulation:
Moulded epoxy

Windings:
Exclusive air cushioned technique provides virtually stressless
elements for improved performance. Non inductively wound.
Direction of winding reversed at half turns point

Weight
RBB5 - 0.5kg
RBB6 - 0.6kg
Size

350mm x 100mm x 80mm (W H D) approx (all models)