Accuracy 3% low residual capacitance max operating voltage 300vdc, 230vac 50hz these decade boxes are built into a metal bench top box. Edfms resistance capacitance decade box edfms new combo decade box features 7 decade switches for resistance and 6 decade switches for capacitance. Decade resistance box calibration up to 100 megaohms. Extech division decade box,1 to 11,111,110 ohm,resolution 1 ohm,accuracy 1%,0. Decade boxes are used to check and calibrate test equipment. If youre installing the decade resistance in an enclosure. To open an existing file click on file open on the toolbar and select the file to open. Im working on a general radio type 602j decade resistance box.
To get a varying value of resistance on a particular point in electrical circuit. The main function of these decade boxes is to create a resistance, capacitance. Models 278610 and 278620 sixdial decade resistance boxes allow quick and easy setting of a wide range of resistance. Resistance decade box precision resistance a resistance decade box houses several precision resistors ohms organized in decades of ten ex. As a default a blank file named circuit 1 is opened up on the workspace. Decade boxes handheld resistance decade box enlarge mfr. This users manual contains useful information regarding the instruments functions and operating procedures, as well as precautions that should be observed during use.
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. Decade resistance box high precision decade megohm box. Traditional decade boxes looked like something out of dr. Read the color code and record the values of your three resistors. The 1040 is an accurate hand held decade resistance box designed to meet the needs of industry and education. Wide range decade boxes for product design or calibration checks durable construction case may be grounded separately 3 binding posts permit isolated substitutions 1% resistance substitution from 1 to 11, 111, 110ofeatures. 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. Last week in my college physics lab we got to use these variable resistance boxes. The economical models carry silver plated phosphors bronze switches with silver plating providing driftfree values. Then i shaw the prices of used and new ones and thought that im in a crisis and they are too expensive for me. These resistance boxes are used in combination with voltage or current standards to adjust voltage or current, as dummy resistances or as an arm of ac bridges. The yokogawa 2786 decade resistance boxes are six dial boxes that allow quick and easy setting of a wide range of resistance. The slimline design means it takes up minimum bench space and is easily transportable. The slimline design means it takes up minimum bench space and is.
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. This useful tool may be set resistance value from 1. It is possible to set the box to higher resistance values by setting switches to eleven, instead of ten, but the total resistance value must then be calculated by adding. 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 resistance box in17 equipment heathkit brand, heath co benton harbor mi, build 1967. 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. Accuracy of the 9340 decade resistance boxes is better than 0. Oh, well, ill try using some wax to get the gloss back. If you have access to a laser engraver, you can etch it into the enclosure. Decade boxes decade lcr boxes manufacturer from mumbai.
A decade resistance box, for instance, is normally used to alter the characteristics of laboratory circuits. Heathkit eu30a heath decade resistance module used working. Resistance standards are a complete family of easy to use resistance standards. General radio company 3dial decade inductor type 1490c. Adjust the knobs to output any of the discrete resistances offered by the box. Dials are connected internally so that their values add to one another. The 2786 decade resistance boxes are stable variable resistors with 6 dials which can be set accurately and quickly. How a decade resistance box works and how to build one jan. 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. Resistance decade box, 10w load all electronics corp. 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.
Detailed information about building and using the decade resistance can be found it its hookup guide. I knew i had to have one, and why not make it mysel. I should have remembered conrad hoffmans admonition to not use solvents to clean up the front panel, but i forgot and used hitest isopropyl alcohol. All calibrations include as foundas left data with measurement uncertainty. To open an existing file click on file open on the toolbar and select the file. 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. 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.
They had two inputs and six dials, and could generate one million different resistances across the two inputs. 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. 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. What are the applications of a decade resistance box in. 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. Mc systems 4441 r probe micropositioner right hand side. Decade resistance box provides any r within a wide range of values first dial is the units or r.
A power resistance decade box designed to meet the standard for industrial use and technical education purposes. Decade capacitance boxes decade boxes, decade resistance boxes decade boxes, 1 mohms to 111 mohms decade boxes, decade resistance boxes 1 ohms to 11. The high prices of commercial units, even on auction sites, rule out buying one for the odd occurrence you may need it. The omega db series of resistance decade boxes is a family of instruments. Capacitance decade boxes model bc05 range decade 1 0. A decade resistance box is a precisely adjustable resistance and thus a usefull tool for testing and troubleshooting. Model 2793 is a highaccuracy, stable dc variable re sistor with 6 dials and is available in two. Others may be tuned to low electrical frequencies to calibrate sensors or other resistance based applications such as ac and dc bridges.
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. Frankensteins lab large wooden enclosures, with engraved front panels and big. We are also manufacture decade resistance box for educational institutes. Housed in a robust ventilated case, the 1065 can withstand arduous use whilst maintaining accuracy and reliability. These resistance boxes can be used in combination with voltage or current generators for adjusting voltage or current. When needed to determine the correct resistance value, the rd300 offers 7 decades of resistance ranges, from 1 to over 11m. Then i had a look on prices of 10 throw switches and well i thought i design a box without those expensive switches. Extech instruments resistance decade box380400 the home. It is ideal for service, prototype and experimental use. Before using this product, thoroughly read this manual to understand how to use it properly. Yokogawa 2786 decade resistance box decade boxes instrumart. Keep this manual in a safe place for quick reference in the event that a question arises.
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 and output. Apr 07, 2020 a decade resistance box, for instance, is normally used to alter the characteristics of laboratory circuits. This repository is for a decade resistance box kit, adjustable between 0 ohms and 999,990 ohms in 10 ohm steps. Others may be tuned to low electrical frequencies to calibrate sensors or other resistancebased applications such as ac and dc bridges. This is the sparkfun decade resistance box, an involved pth soldering kit that allows you to quickly and accurately dial in a specific resistance value between 0 and 999,990, in 10 increments. Users 2793 279301, 279303 manual decade resistance box. Contact information of yokogawa offices worldwide is provided on the. Thank you for purchasing the 2793 decade resistance box. Iet is the worlds leading rlc decade box manufacturer.
Consider you have a tunable potentiometer with a range. If so, you need to install simplified chinese font pack for acrobat reader to display the file properly. In the decade box github repository, there is an svg file of the panel legend. Decade resistance box calibration decade resistor calibration. General radio 602j decade resistance box antique radios. Digital decade resistance box on the cheap hackaday. Resistance decade substitution box kit from ir analysir. If youve ever been designing a circuit and had to experiment with different values of caps and resistors, you probably didnt like it much. Combined decade lcr box 3 in 1 combo box is a suitable desk top instrument made for educational institutes, testing laboratories and electronic research and development organizations. I was interested in having a decade resistance box because i find it convenient when working with opamps, filters etc. 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. Hello, i am planning to do the programmable decade resistance box. Precision lab grade resistor standard with accuracy.
Decade resistance box in17 equipment heathkit brand. Extech instruments resistance decade box380400 the home depot. Decade resistance box hookup guide introduction a decade box is a tool that contains resistors of many values accessed via mechanical switches. The leeds and northrup decade resistance box shown above is a common item found at swap meets and on line auctions. They are known as decade boxes because they have controls that. My doubt is how can implement the variable resistance value in steps of 1% using microcontroller. Alternatively, it can also be used to identify the best value for circuit operation and then read that value from the switches. The main function of these decade boxes is to create a resistance or capacitance with a specific value by using a. To save a schematic under a different name simply click on file save as on the toolbar and enter the name of your choice. Some pdf files may contain simpilfied chinese fonts. The concept is simple, a decade box is a tool that contains resistors of many values that can be accessed via mechanical switches. It can be a hassle to switch out components over and over, trying to find the right combination to suit y.
Decade boxes resistance decade wnist cert of cal enlarge mfr. Solid hardware case screw binding posts, 9 x 6 x 5. If you arent lucky enough to have access to a laser cutter, you can simply print it on paper, trim it to fit, and stick it on with adhesive tape. Iet is the worlds leading resistance decade box manufacturer. The 727270 cal d from tenma is a resistance decade box. It can also be used to identify the best value for circuit operation. How a decade resistance box works and how to build one. General radio genrad type 1607a transferfunction immitance bridge 1607a. Decade resistance boxes resistance calibration boxes. Now one would expect to pay a high price for decade boxes that give something like 10 milliohms resolution but for general purpose at home, a.