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Resistance Standards & Decades

Code: #RBBC

Resistance Standards & Decades

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Resistance Standards & Decades

Xuất xứ: England

High accuracy decade box with versatile wide ohm range

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

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.

Resistance Standards & Decades

Calibration
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 / +20°C to +85°C ±5ppm maximum over –55°C to + 125°C 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:
-50°C to +125°C
Power Rating:
0.33 watt (+85°C) 0.25 watt (+110°C)
±3ppm / +20°C to +85°C ±5ppm maximum over –55°C to + 125°C 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:
-50°C to +125°C
Power Rating:
0.33 watt (+85°C) 0.25 watt (+110°C)
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)

 

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