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Cropico RBC Decade Resistance Box
HIGH ACCURACY, HIGH CURRENT DECADE BOXES
WITH VERSATILE WIDE OHM RANGE
The RBC Series is a robust range of high dissipation resistance
decades available in 5 or 6 decade versions and suitable for
applications where reasonably precise and stable adjustable
loads are required.
Constructed using the same high quality
components as our other resistance decades and housed in a
light alloy ventilated case, the RBC Series will withstand the most
arduous use and give many years service.
All parts are fully
serviceable and can be repaired in our workshop should the more
enthusiastic user damage the units with high overloads.
Key Features
 5 and 6 Decades available
High dissipation
5 Watts per coil
Accuracy 5%
0.1 ohm to 111,111 ohm
Fully serviceable
Special model for insulation simulation
Data Sheet
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Specifications
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Calibration
Calibration certificates including UKAS traceable are available on request
Switches
Contact material gold plated brass
Contact resistance = 5 milli ohm
Insulation Resistance (all paths = 10 giga ohm)
Proof voltage 1kV
Resistors
Temperature Co-efficient: +/-3ppm / +20degC to +85degC +/-5ppm maximum over -55degC to + 125degC 0.1, 0.01, and 0.001 dials 10ppm/degC
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: -50degC to +125degC
Power Rating: 0.33 watt (+85degC) 0.25 watt (+110degC)
Maximum Continuous Working Voltage: Up to 250V dc
Noise: Essentially non-measurable <1.5 mV/degC
Thermal E.M.F: <0.4mV/degC 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
5 Dial Box - 3.0kg
6 Dial Box - 3.5kg
Size
5 Dial Box - 390mm x 105mm x 130mm (W H D) approx
6 Dial Box - 450mm x 105mm x 130mm (W H D) approx
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Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
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