Decade Boxes

In order to offer our customers the best selection of testing instruments we are proud to offer accurate and dependable decade boxes. Decade boxes purchased through Electri-Temp are manufactured by some of the most experienced and knowledgeable companies in the industry who are well aware of what customers require in their decade boxes. The refined experience of our manufacturing partners ensures that decade boxes are manufactured with the applications and specifications of the customer in mind. Combined with competitive pricing, the functionality, features and capabilities of our decade boxes can’t be beat. Our decade boxes provide customers with the quality that comes with industry know-how and the accuracy made possible with cutting edge technology.

We offer a versatile selection of durable decade boxes measuring in a wide variety of decades with very high levels of accuracy. Our decade boxes are suitable for a variety of applications including use in the field, laboratory, and as automated test equipment. Our line of decade boxes is geared to suit the differing needs of our customers and includes models that are engineered for low cost and high precision as well as decade boxes that are manufactured specifically for applications requiring extremely high accuracy in settings such as electrical laboratories.

All of our decade boxes are constructed with high quality components with specific models designed expressly for durability and arduous use in the field. In addition, all of our decade boxes are serviceable and can be repaired by our manufacturing partners to ensure long lasting decade boxes.

Our line of decade boxes includes models with features and capabilities such as:

Available residual capacitance compensation
Available residual resistances: 1 ohm, 70 milliohm, 80 milliohm
Decade boxes available with 1,3,6 and 9 decades
5, 6 and 8 decades
Error tolerances as low as 0.01 %
Fully-serviceable decade boxes
Gold-plated Switch Contacts and Solid Copper Input Terminals
High dissipation models
Light weight models
Long term stability ± 20ppm/year
Low-cost models
Up to 5kV max voltage
Models with 1% accuracy
Models with 5 watts per coil
Models with 5% accuracy
Most models suitable for Pt100 Simulation
Negligible Thermal e.m.f.s

Decade Resistance Boxes 005 Precision ‘OO’ Series 0.01%	RBB Resistance Decade 0.05 High Accuracy RBB Series 0.05%	High Dissipation RBC Series
Low-cost, RM6 1% Accuracy	Wide-range RM8 Series 0.1%	Cost-saving RM6N Series 1%
Computer-Controlled Series 1422	High Resistance High Voltage RH9 Series

Decade Resistance Boxes 005

005/6/8 High Accuracy Resistance Decade Boxes / 5, 6 and 8 Decades + Special Models for Pt100 Simulation

A versatile range of resistance decade boxes available in 5, 6 and 8 decades. High Accuracy and wide range 0.001 ohm to 11 Megohms are combined in a compact lightweight case. The switches have gold plated contacts to ensure a low contact resistance and negligible thermal emf.

Some resistance decade box models are particularly suited to Pt100 simulation with resolution as low as 0.001 ohm (0.0025°C).

High Accuracy Resistance Decade Boxes / 5, 6 and 8 Decades

Key Features
• High Accuracy 0.01% and High Performance
• Suitable for Pt100 Simulation
• 5, 6 and 8 Decades
• Long Term Stability ± 20ppm/year
• Low Temperature Co-efficient ± 3ppm/°C to + 85 °C
• Gold Plated Switch Contacts and Solid Copper Input Terminals
• Negligible Thermal e.m.f.s
• Light Weight / Small Size
• With Certificate of Conformity
• In-House Test Figures Optional

RBB Resistance Decade 0.05

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.

Key Features
• 5 and 6 Decades Available
• Total Range 11.111 MΩ
• Smallest Steps 0.001Ω
• 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

RBC High Dissipation Resistance Decade

RBC High Dissipation Resistance Decade 5 Watts per coil

The RBC Series is a robust range of high dissipation resistance decades available in 4, 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%
• 0.1Ω to 111,111Ω
• Fully Serviceable

RM6 Resistance Decade

RM6 Resistance Decade / Total Resistance 11.1111 M Ohms, Resolution 10 Ohms

This small cost effective decade resistance box further enhances our comprehensive range, offering excellent value for money. This 6 decade model has a total resistance of 11.1111 Megohms with a resolution of 10 ohms. The accuracy of ±1% is achieved using metal film resistors which have a power rating of 0.4 Watt, the maximum specified voltage is 250V.

Designed for durability, the case is polished hardwood with a light alloy top panel which is clearly marked with the switch position numbers and decade values. The size is only 287 x 65 x 65 mm. The RM6 is a valuable addition to any workshop or laboratory offering a wide range of values with minimum cost.

Key Features
• 6 Decades
• Range 10Ω to 10 MΩ
• Accuracy 1%
• Low Cost

RM8 Resistance Decade

RM8 Resistance Decade / Total Resistance 1.1111111 Megohm, Resolution 0.01 ohm

The model RM8 decade resistance box is designed to complement our range of resistance boxes, offering a very wide range 0.01ohm to 1Megohm in a compact and versatile unit. The low decade steps of 0.01ohm enables very high resolution, when simulating resistance values and the power rating is 1.0 watt per coil.

The RM8 uses double pole switching to minimize the effects of contact resistance. The lower value decades (0.01 and 0.1ohm) are manufactured from manganin resistance wire and the other decades from selected metal film resistors. This offers good stability combined with excellent load and temperature coefficients. Housed in a hardwood case with metal panel the size is only 254 x 145 x 80 mm and the connections are with 4 mm binding posts that will accept spade or banana plugs.

Key Features
• 8 Decades
• Wide Range 0.01Ω to 1MΩ
• Accuracy 0.1%
• Exceptional Value for Money
• Compact Size
• Power Rating 1W / Coil

RM6N Resistance Decade

RM6N, RM6 N2, RM6 N3 Resistance Decade

Total Resistance 11.1111 Megohm, Resolution 10 Ohms

The RM6-N is a space and cost-saving 6 decade resistance box . 3 models are available covering the range 1ohm to 111.111 Megohm. An additional 1kohm resistor is available at the terminals enabling the user to make a simple divider. The RM6-N incorporates 0.6 watt metal film resistors with a specified accuracy of ±1%. The maximum permissible voltage is 250 V d.c. Designed for durability and ease of maintenance, the case is high impact polystyrene, and the size is only 190 x 140 x 70 mm.

The RM6-Ns constitute an ideal tool for use in all electrical and electronic laboratories or workshop environment offering a wide range of values with minimum cost.

Key Features
• 6 Decades
• 3 models to choose from
• Range 1Ω to 100 MΩ
• Accuracy 1%
• Small Size and Low Cost

1422 IEC Resistance Decade

Computer-Controlled High-Precision Resistance Decade
Model 1422 IEC, 1423 IEC, 1424 IEC, 1422 RS232, 1423 RS232, 1424 RS232

Highest precision, temperature and long-term consistency are characteristic features of the described high-precision resistance decade. Many years of experience, tried-and-tested technology and the use of field-proven materials guarantee the high level of precision.

The decade resistors consist of low-capacity and low-inductance wire wound of Zeranin. The low temperature coefficient of this material, the low error tolerance of the resistors and the long-term stability achieved through careful artificial ageing are the guarantee for reliable conformity with the technical specifications for this decade resistor.

A specially developed precision stepping switch with high-quality contact materials and optimal brush construction guarantee very good reproducibility. The contacts are self-cleaning and virtually free of thermoelectric power. All 6 decade resistor stages are contained in an attractive 19" casing . The casing acts as screen against electrostatic interference. It is conductively connected to the earth socket on the front panel. Electrical connection of the decade resistor to the screen is possible with a connecting link.

The two sub-decades R D1 and R D2 are arranged so that they can be operated independently. An insulated plug-in link joins the two sub-decades together to form a six decade resistor.

This makes the decade resistors suitable for universal applications. Very low zero-sequence resistance has been achieved by circuit optimization. This very low zero-sequence resistance is divided again if only one decade section is being used.

Application
A prime feature of the high-precision resistance decades is the design, fulfilling a host of functions. Meeting a whole range of requirements in practice they are used as.

Computer Control
Each of the 3 versions - type 1422, 1423 or 1424 - is also available with computer control. IEEE488 and RS232 interfaces are available. The RS232 version is easily extended to RS485 or RS422. The stepping motors used do not alter the known high long-term stability and reproducibility of the decades with computer control either.

Key Features
• 6-stage high-precision resistance decade
• 2 x 3-stage high-precision resistance decade
• 2 variable normal resistors
• Scalers with random-setting divider ratio
• Ranges from 10 x 0,01Ohm to 10 x 100,000 Ohm
• Error tolerance 0,01 %
• Resistor material: ZERANIN®
• Temperature coefficient < =2 ppm/K
• Long-term stability < 0,01 % over years

RH9A High Resistance High Voltage

RH9A High Resistance / High Voltage

Decade Boxes - Total Resistance 1 Terraohm- Resolution 1 kilohm - Max Voltage 5000 Vdc

Designed using the Cropico High Quality SP1 switch combined with specially selected resistors, this range of high ohm resistance decades is ideal for the calibration of insulation test sets with a voltage rating up to 5kV.

Housed in a rugged plastic carrying case with up to 9 decades the RH series covers the range 1 kΩ to 1 TΩ and is equally at home in the laboratory, workshop or field application.

Key Features
• 1, 3, 6 and 9 Decades available
• Range 1kΩ to 1TΩ
• Max Voltage 5kV
• Accuracy ± 0.1%
• Portable Case

Alphatek, ASL, Calibration, Clare, Cropico, Data Acquistion, Decade Boxes, Digital Thermometers, Dry Blocks / Furnaces, Electrical Safety Tester, GMC,
Hipot / Dielectric Strength Testers, Insco, Insulation Testers, Isotech, Liquid Baths, Measurement, Megohmmeters, Microhmmeters, Micro Movements,
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