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Seaward RBB5-F Cropico Resistance Standards & Decades

Name: Seaward RBB5-F Cropico Resistance Standards & Decades
Brand: Seaward
SKU: SeawardRBB5-F
Price: 1547.70 USD
Availability: InStock

0 reviews | Catalog: RBB5-F | Model: Seaward RBB5-F

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RBB5-F High Accuracy 0.05% Decade Box

Accuracy 0.05% for premium dials
Resistance coils wound in selected low TC wire
Special Waidner Wolff decade minimises switch contact resistance
Total Range 11.111 Mega ohm
5 and 6 decades available
Special models for Pt100 simulation
Special model for insulation simulation
Smallest Steps 0.001 milli ohm

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List Price: $1,547.70

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HIGH ACCURACY DECADE BOXES WITH VERSATILE WIDE OHM RANGE

A versatile range of resistance decade boxes, available in 5 & 6 decades. Both high accuracy and a wide range, 0.001 ohm to 11 mega ohm, are combined in a rugged case. The switches used are gold plated to ensure a low contact resistance and negligible thermal E.M.F. Some models employ the Waidner Wolf technique to eliminate the errors that may be caused by the variations in switch contact resistance. These models are particularly suited to applications such as Pt100 simulation where resolutions as low as 0.001 ohm (» 0.0025°C) are required.

THE RBB SERIES

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, & 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 250 V 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)

Resistance Measurement:

RBB5				RBB6					Decade	Accuracy	Current Max mA
B	C	D	E	B	C	D	E	F	Decade	Accuracy	Current Max mA
				•					10 x 0.001 Ω	± 2%	2000
•				•	•				10 x 0.01 Ω	± 1%	2000
•	•			•	•	•			10 x 0.1 Ω	± 0.5%	2000
•	•	•		•	•	•	•		10 x 1 Ω	± 0.2%	600
•	•	•	•	•	•	•	•	•	10 x 10 Ω	± 0.05%	200
•	•	•	•	•	•	•	•	•	10 x 100 Ω	± 0.05%	60
	•	•	•		•	•	•	•	10 x 1k Ω	± 0.05%	20
		•	•			•	•	•	10 x 10k Ω	± 0.05%	6
			•				•	•	10 x 100k Ω	± 0.1%	2
								•	10 x 1M Ω	± 0.1%	0.3

Model	No. Decades	Total Resistance	Resolution	Sutable for Pt100 Simulation	Resolution °C when Simulating Pt100	Residual Resistance Ω
RBB5-B	5	1,112.1 Ω	0.01	•	0.025	1 Ω
RBB5-C	5	11,111 Ω	0.1	-	-	0.012 Ω
RBB5-D	5	111,110 Ω	1	-	-	0.012 Ω
RBB5-E	5	1.1111M Ω	10	-	-	0.012 Ω
RBB5-F	5	11,111 Ω	100	-	-	0.012 Ω
RBB6-B	6	1,112.11 Ω	0.001	•	0.0025	1 Ω
RBB6-C	6	11,112.1 Ω	0.01	-	0.025	1 Ω
RBB6-D	6	111,111 Ω	0.1	-	-	0.013 Ω
RBB6-E	6	1.11111M Ω	1	-	-	0.013 Ω
RBB6-F	6	11.1111M Ω	10	-	-	0.013 Ω