Standard electronic decade value tables decade table vishay dale document number 31001 for technical questions, contact. It has five or six switches, one for each decade of resistance, so you can dial in any resistance typically 1. Sep 28, 2014 the device is powered by an 18v transformer and rectifier and, as a bonus, stynus got all of his parts on the cheap which made this a great solution to the expensive resistance decade box problem. When needed to determine the correct resistance value, the rd300 offers 7 decades of resistance ranges, from 1 to over 11m. Suppose if the voltage null condition occurs at 250 ohms of the resistance decade box, then the unknown resistance is also 250 ohms. The switch dials have clear markings and in an easy to read inline format. To get a varying value of resistance on a particular point in electrical circuit. Further the gold plated switches have been employed in the best grade of decade resistance box to provide very low contact resistance with driftfree values. This users manual contains useful information regarding the instruments functions and operating.
High accuracy and precision clear visual indication high stability and low temperature coefficient compact and robust. You can also choose from electronic, hydraulic decade resistance box there are 64 suppliers who sells decade resistance box on, mainly located in asia. Revision 04oct06 335 standard resistance values are obtained from the decade table by multiplying by powers of 10. What are the applications of a decade resistance box in the. Decade resistance boxes 2786 models 278610 and 278620 sixdial decade resistance boxes allow quick and easy setting of a wide range of resistance. Model 2793 is a highaccuracy, stable dc variable re sistor with 6 dials and is available in two styles. F excellent for circuit development five decade ranges of. Users 2793 279301, 279303 manual decade resistance box. Manufacturer of decade box decade resistance box, decade capacitance box, decade inductance box offered by crown electronic systems, new delhi, delhi.
We are also manufacture decade resistance box for educational institutes. Decade resistance box in17 equipment heathkit brand. Binding posts 3 offer simple and secure connections. Decade resistance box high precision decade resistance box. Low resistance measurement is performed for many reasons, including, but not limited to safety, performance and quality testing. Voltmeters digital of suitable accuracy and very high resolution 1mv. They work using the simple principal of mechanical switching of resistance to a greater or lower impedance which enables checking of equipment at various resistances. Wheatstone bridge circuit theory, example and applications. Here are some accessories that you may want to have around when using with the decade resistance box. Digital decade resistance box on the cheap hackaday.
Housed in a robust ventilated case, the 1065 can withstand arduous use whilst maintaining accuracy and reliability. As per our process temperature range, we have three different types of formulas for the resistance calculations. Decade resistance box hookup guide introduction a decade box is a tool that contains resistors of many values accessed via mechanical switches. These resistance boxes are used in combination with voltage or current standards to adjust voltage or current, as dummy load resistances or as an arm of ac bridges. Decade capacitance boxes decade boxes, decade resistance boxes decade boxes, decade resistance boxes 1 ohms to 11. In prototyping of electronic circuits, a decade box is a type of test equipment that can be used to substitute the interchanging of different values of certain passive components with a single variable output. University of north carolina at charlotte department of.
Connect the 2090 via rs232 connection usb to rs232 adapter available to a computer to automate any task performed by a decade resistance box to automate calibration or ate tasks. How many times while prototyping a circuit you had to search for a particular resistor value spending almost half an hour trying to find it. Resistance decade box by g4cnh april 2017 a resistance decade box is something you may never need and yet if you do ever want one, you will be glad you have one at hand. The concept is simple, a decade box is a tool that contains resistors of many values that can be accessed via mechanical switches. The top countries of suppliers are china, india, and pakistan, from which the percentage of decade resistance box supply is 71%, 21%, and 3% respectively.
Then i shaw the prices of used and new ones and thought that im in a crisis and they are too expensive for me. Edfms resistance capacitance decade box edfms new combo decade box features 7 decade switches for resistance and 6 decade switches for capacitance. Adjust the knobs to output any of the discrete resistances offered by the box. Heathkit resistance and capacitor substitution boxes youtube. A resistance decade box kurbelwiderstand, made in former east germany in prototyping of electronic circuits, a decade box is a type of test equipment that can be used to substitute the interchanging of different values of certain passive components with a single variable output. Decade resistance box calibration decade resistor calibration. I connected then up to an autoranging multimeter so that you can see the changes in resistance. To save a schematic under a different name simply click on file save as on the toolbar and enter the name of your choice. It has four range selectors covering 09 ohms, 1090 ohms, 100900 ohms, and 9000 ohms, which allows the user to select any resistance in one ohm increments from 1 ohm to 9,999 ohms.
Resistance standards, decade resistors, ohmmmeters iet labs. This is a must have device if you do a lot of breadboarding. Iet is the worlds leading resistance decade box manufacturer. Decade boxes, decade resistance box time electronics.
To open an existing file click on file open on the toolbar and select the file to open. Set the lcr meter for dcr dc resistance measurement. Decade boxes are made for resistance, capacitance, and inductance, the values of which can be increased incrementally by way of switching the points of contact for the input. Resistance decade substitution box kit from ir analysir. Decade resistance box kit tool name drbkitassembling manualdrbkit is an assembly kit for a variable resistance box that is available for practical use. Thus if an attempt is made to use the decade resistance to carry say the one ampere necessary for the ammeter the resistamce box vill be damaged. These boxes are more for serious circuit development. User manual resistance decade box extech instruments. Decade resistance box in17 equipment heathkit brand, heath co benton harbor mi, build 1967.
Slide switches allow easy addition and subtraction of resistance values. Here in this case, the wheatstone bridge is balanced by adjusting the decade resistance box until the voltmeter reads zero value. Use the lcr meter to measure r x1, r x2, and r x3, and record the values in table 61. Iet manufactures a variety of rtd simulators for the field, the laboratory or automated stations. A decade resistance box is a precisely adjustable resistance and thus a usefull tool for testing and troubleshooting. Decade boxes resistance decade wnist cert of cal enlarge mfr. The 1433 is a precision resistance source with excellent characteristics of stability, temperature coeffi. The decade resistance boxes have current ratings that must be observed. Time electronics 1061 resistance decade box is a low cost, low ohm decade box suitable for both educational and industrial applications ideal decade box for educational purposes and industrial applications with its 6 large switches and clear numerical readout and precision 1% accuracy. I was interested in having a decade resistance box because i find it convenient when working with opamps, filters etc. Simply dial in the desired resistance on the thumbwheel switches. Part of a series of materials in the under contract with the. They are known as decade boxes because they have controls that.
This repository is for a decade resistance box kit, adjustable between 0 ohms and 999,990 ohms in 10 ohm steps. Resistance box, often called rheostat, is an apparatus equipped with numerous ranges of coils. Any number of decades from one to eleven is available. Decade resistance box calibration up to 100 megaohms. All calibrations include as foundas left data with measurement uncertainty. This users manual contains useful information regarding the instruments functions and operating procedures, as well as precautions that should be observed during use. Eico 1171 vintage resistance decade box restoration page 1. Browse over 30,000 products, including electronic components, computer products, electronic kits and projects, robotics, power supplies and more. Model m622 is high accuracy resistance decade box with range from 1. The extech 380400 resistance decade box is the perfect tool for testing and calibrating in the product design process as it can be easily substituted into a circuit and function in the place of any component with a standard value. Thank you for purchasing the 2793 decade resistance box.
Decade boxes handheld resistance decade box enlarge mfr. These precision instruments cover the requirements of both field and laboratory work, and are commonly used in educational establishments. It can also be used to identify the best value for circuit operation. As we are discussing about calibration via a decade resistance box, we need to calculate the equivalent resistance which to be applied from a decade resistance box to the conductivity transmitter for the calibration purpose. Models 278610 and 278620 sixdial decade resistance boxes allow quick and easy setting of a wide range of resistance.
Tool list decade resistance box kit tool name manual. Decade resistance boxes resistance calibration boxes. The use of a resistance box or a decade box is to help calibrate instruments used to measure electrical values such as voltage, current, and resistance. A look inside the resistance and the condenser capacitor substitution boxes. Some pdf files may contain simpilfied chinese fonts. The economical models carry silver plated phosphors bronze switches with silver plating providing driftfree values. A precision low ohm resistance box designed for general laboratory work including platinum resistance.
Before using this product, thoroughly read this manual to understand how to use it properly. The box which contains the resistors of different values for estimating and comparing the resistance is known as the resistance box. Solid hardware case screw binding posts, 9 x 6 x 5. For more information about the decade resistance box, check out the resources below. If so, you need to install simplified chinese font pack for acrobat. How a decade resistance box works and how to build one jan. The slimline design means it takes up minimum bench space and is easily transportable. Then i had a look on prices of 10 throw switches and well i thought i design a box without those expensive switches. Resistance decade box model 380400 introduction congratulations on your purchase of the extech 380400 resistance decade box. Decade box chassis decade box cover pointer knob resistor bank assembly range 1 resistor bank assembly range 2 resistor bank assembly range 3 resistor bank assembly range 4 resistor bank assembly range 5 resistor bank assembly range 6 switch rotor shown in extreme counterclockwise position for zero resistance. Nov 23, 2016 this video will show you how to build your own decade resistance box. The main application of the resistance box is to control the specific value of current to flow through the circuit.
What are the applications of a decade resistance box in. The main function of these decade boxes is to create a resistance or capacitance value by using a combination of the rotary decade switches. Thank you for purchasing the 2786 decade resistance box. A decade resistance box is a similar device but is for more precision work. Model 2793 is a highaccuracy, stable dc variable re sistor with 6 dials and is available in two.
Consider you have a tunable potentiometer with a range. Decade box decade resistance box manufacturer from new delhi. Detailed information about building and using the decade resistance can be found it its hookup guide. These resistance boxes are used in combina tion with voltage or current standards to adjust voltage or current, as dummy load resistances or as an arm of ac bridges. How many times you measured a resistor with your multimeter, just to make sure it really is the value you. As a default a blank file named circuit 1 is opened up on the workspace.
Both can be used independently or also has the ability to combine both resistors and capacitors to create an rc network that can also be connected in series or parallel via three way switch. The direction of galvanometer deflection indicates whether the decade box resistance must increase or decrease. The high prices of commercial units, even on auction sites, rule out buying one for the odd occurrence you may need it. The leeds and northrup decade resistance box shown above is a common item found at swap meets and on line auctions. And the corresponding resistance value in the box is equal to the unknown resistance.
Resistance decade box model rd300 introduction the rd300 resistance decade box is a convenient tool aiding you both in design and testing as well as calibration of your test equipment. The purpose of designing such boxes is to provide electrical resistance against the current flow, by introducing a voltage drop across terminals. Below we will look at a number of applications where low resistance measurement plays a vital function. The rm6n is a space saving 6 decade resistance box, 3 models are available covering the range 1 ohm to 111,111 mega ohm. Before using this product, thoroughly read this manual. An additional 1 kilo ohm resistor is available at the terminals enabling the user to make a simple divider. To calibrate the rtd transmitter, the following equipment will be required. Data resistance boxes we stock those from martindale and cropico are designed to help calibrate equipment in schools. Introduction specification the 8000 is a compact, robust and accurate decade resistance box designed to meet the needs of both industry and education. This device offers 7 decades of resistance ranges from 1 to over 11mohms in 1ohm steps. In this blog post i will explain how a decade resistance box works and will give a tutorial on how to build your own for less than 50. A power resistance decade box designed to meet the standard for industrial use and technical education purposes.