Decade Boxes

What are Decade Boxes?

Decade boxes are test instruments which use a series of resistors, capacitors, or inductors to replicate different electrical values. They can be quickly and easily substituted into a circuit and replace any standard value component. Their ability to be configured to nearly any resistance, capacitance, or inductance makes decade boxes a convenient way to find the optimum value for circuit operation. They are ideal for verifying the accuracy of test equipment prior to use as well as troubleshooting.

They are known as decade boxes because they have controls that correspond to the digits in a decimal number - a control for the tens position, a control for the hundreds position, and so on.

How they work?
Decade boxes are passive devices that consist of switches and either a series of resistors, capacitors, or inductors of different values arranged to form “decades”. Decades are set up in factors of ten. For example, a resistance decade box may have a 5 ohm, 2 ohm, and two 1 ohm resistors in the first decade. The second decade may have a 50 ohm, a 20 ohm, and two 10 ohm resistors. The third decade may have a 500 ohm, a 200 ohm, and two 100 ohm resistors. With this combination, this three decade box can be switched to any value from 1 ohm to 999 ohms in 1 ohm steps. Some decade boxes may have 6 or more decades to allow for very wide ranges and highly precise values. Decade boxes are characterized by their range, maximum resolution, and accuracy.
Using a decade box for testing consists of setting the box to the desired value and hooking up the input device such as a transmitter, controller, multimeter, etc. The display value of the input device should match the set value of the decade box.
Types of Decade Boxes
• Resistance Decade Boxes – can simulate resistance for testing the accuracy of thermostats, temperature controllers, multimeters, and others.
• Capacitance Decade Boxes – can simulate capacitance for testing the accuracy of multimeters and other instruments that measure capacitance.
• Inductance Decade Boxes - can simulate inductance for testing the accuracy of multimeters and other instruments that directly measure inductance

Applications include
• Field and laboratory work
• Educational establishments
• Design work

Things to Consider When Selecting a Decade Box:
• Is this for simulating resistance, conductance or inductance?
• What range is required?
• How much resolution is needed?
• What level accuracy is preferred?

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Beskrivning Pris Decade Box Type Calibrated Resistance Resolution Best Maximum Resistance Accuracy Best Minimum Resistance Accuracy Residual Resistance Capacitance Resolution Best Capacitance Accuracy Residual Capacitance Inductance Resolution Best Inductance Accuracy Residual Inductance Power Rating Temperature Coefficient
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RS-artikelnummer 193-8686
VarumärkeRS PRO
435,11 kr
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Resistance - - 1% - - - - - - - - 0.3W -
RS-artikelnummer 382-6451
Tillv. art.nrDR 07
VarumärkeELC
1 602,70 kr
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Resistance - ±1% - - - - - - - - 0.5W ±50ppm/°C
RS-artikelnummer 306-9232
Tillv. art.nrDC 05
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2 429,90 kr
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Capacitance - - - - - 100pF ±1% - - - - - ±125ppm/°C
RS-artikelnummer 617-692
Tillv. art.nr1040
VarumärkeTime Electronic
6 001,86 kr
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Resistance - ±1% ±0.1% Less than 250mΩ - - - - - - 1W ±50ppm/°C
RS-artikelnummer 203-243
Tillv. art.nr1040
VarumärkeTime Electronic
6 882,86 kr
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Resistance RSCAL ±1% ±0.1% Less than 250mΩ - - - - - - 1W ±50ppm/°C
RS-artikelnummer 537-2574
Tillv. art.nr1065
VarumärkeTime Electronic
11 429,07 kr
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Resistance - 0.1Ω ±5% ±1% 20mΩ - - - - - - 10W ±200ppm/°C
RS-artikelnummer 255-581
Tillv. art.nrTEK905
VarumärkeMartindale
2 512,62 kr
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Capacitance - - - - - 100pF ±5% 30pF - - - - -
RS-artikelnummer 669-586
Tillv. art.nr1040
VarumärkeTime Electronic
7 225,86 kr
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Resistance UKAS ±1% ±0.1% Less than 250mΩ - - - - - - 1W ±50ppm/°C
RS-artikelnummer 537-7490
Tillv. art.nr1065
VarumärkeTime Electronic
12 310,07 kr
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Resistance RSCAL 0.1Ω ±5% ±1% 20mΩ - - - - - - 10W ±200ppm/°C
RS-artikelnummer 306-9210
Tillv. art.nrDL 07
VarumärkeELC
2 326,50 kr
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Inductance - - - - - - - - 1µH ±5% - - -
RS-artikelnummer 537-7636
Tillv. art.nr1065
VarumärkeTime Electronic
12 653,07 kr
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Resistance UKAS 0.1Ω ±5% ±1% 20mΩ - - - - - - 10W ±200ppm/°C
RS-artikelnummer 301-4894
Tillv. art.nrRM6-N2
VarumärkeCropico
3 445,32 kr
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Resistance RSCAL ±1% - 0.1Ω - - - - - - 0.6W ±100ppm/°C
RS-artikelnummer 306-9226
Tillv. art.nrDR 04
VarumärkeELC
1 085,70 kr
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Resistance - ±1% - - - - - - - - 0.5W ±50ppm/°C
RS-artikelnummer 670-665
Tillv. art.nrRM6-N
VarumärkeCropico
3 591,86 kr
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Resistance UKAS 10Ω ±1% - 0.1Ω - - - - - - 0.6W ±100ppm/°C
RS-artikelnummer 537-2619
Tillv. art.nr1071
VarumärkeTime Electronic
6 512,65 kr
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Capacitance - - - - - 10pF ±1% 55pF - - - - ±300ppm/°C
RS-artikelnummer 912-0018
Tillv. art.nr1061
VarumärkeTime Electronic
4 115,33 kr
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Resistance RSCAL ±1% - 150mΩ - - - - - - 0.75W 100ppm/°C
RS-artikelnummer 792-1976
Tillv. art.nrRBB6-F
VarumärkeCropico
14 293,76 kr
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Resistance UKAS 10Ω ±0.1% ±0.05% 0.013Ω - - - - - - 0.33W ±3 ppm/°C, ±5 ppm/°C
RS-artikelnummer 301-4901
Tillv. art.nrRM6-N2
VarumärkeCropico
3 788,32 kr
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Resistance UKAS ±1% - 0.1Ω - - - - - - 0.6W ±100ppm/°C
RS-artikelnummer 792-1143
Tillv. art.nrRBB5-B
VarumärkeCropico
9 723,48 kr
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Resistance UKAS 0.01Ω ±1% ±0.05% - - - - - - 0.33W ±3 ppm/°C, ±5 ppm/°C
RS-artikelnummer 816-0163
Tillv. art.nr1061
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Resistance - ±1% - 150mΩ - - - - - - 0.75W 100ppm/°C
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