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Standard Resistors SeriesDatabookStandard ResistorsResistance BoxesCustom Productsalpha-elec.co.jp
Standard Resistorswww.alpha-elec.co.jp
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Table of ContentsUSR-SF Series — New Stress-Free Ultra Stable Primary Standard Resistor . 2ASR Series — Primary Standard Resistor. 3CSR Series — Working Standard Resistor. 4LSR Series — High Power Standard Resistor. 5MSR Series — Milliohm Meter Calibration Resistor. 6ATV Series — I/V Converter. 7ADR Series — Precision Programmable Resistance Box/RTD Simulator. 8ADR Series — 6-Dial Decade Resistance Box/RTD Simulator. 9ADR-1000 Series — 1-Dial Resistance Box/RTD Simulator. 10ATS Series — Resistance Transfer Standard. 11Custom Products. 12Traceability Chart. 14Calibration. 15Global Contact Map. 16Revision: 19-May-2015For any questions, co.jp1
USR-SF SeriesNew Stress-Free Ultra Stable Primary Standard ResistorFEATURES Utilizing New Generation Stress Free Bulk Metal Foiltechnology Long-term stability: 0.5 ppm/yr (0.2 ppm/yr typical) Temperature coefficient: less than 0.05 ppm/ C at23 C 5 C Excellent humidity coefficient of resistance less than0.1 ppm/% RH Excellent pressure coefficient of resistance less than0.001 ppm/hPa Available wide range of resistance values at 1Ω, 10Ω,25Ω, 100Ω, 1KΩ, 10KΩIncorporated the technology ofThe National Institute ofAdvanced Industrial Science and Technology(The Japanese patent number 2010-114994)MASSApprox. 2.5 kg (5.5 lbs)CONFIGURATION in millimetersDESCRIPTIONThe USR-SF series is an ultra stable primary standardresistor which is an enhanced version of the USR/ASRseries through the use of Bulk Metal Foil technology.USR-101SFC1P1The ultra stable resistive element utilizes new generationstress-free Bulk Metal Foil technology developed byAlpha Electronics with 37 years experience and is basedon using proprietary Nickel Chrome alloy. This results inextremely low temperature coefficients as 0.05 ppm/ Cat 23 C 5 C. This performance is unique to AlphaElectronics throughout the world.P2C2GNDNominal Resistance 100Maximum Wattage 1 WThe stress-free resistance element eliminates stressfactors using a special treatment process and isencapsulated in a specially-designed ceramic case toprotect against humidity and oxidation. Thus, less than0.5 ppm/year (0.2 ppm/year typical) is realized.USR-101SFAlpha's Bulk Metal Foil construction provides excellentAC characteristics—superior to performance ofconventional wirewound standard resistors.The USR-SF, with its extreme long-term stability and lowTCR, can be used in air which reduces cost and operationfor maintenance of oil bath.The resistive elements are held by special designed caseso, it's suitable for environment with vibration 100ΩUSR-102SF1 kΩUSR-103SF10 kΩAccuracyUncertaintyof werRatingPowerCoefficientOperatingTemp. RangeStorageTemp. Rangeppmppmppm/ Cppmppm/yrWppm/power* C CNumberofTerminals 2 2.5@ 23 C 0.05@23 5 C 0.5@23 5 C 0.5( 0.2actual)1.0 118–280–505* Rated power will be different per future additional low values.www.alpha-elec.co.jp2For any questions, contactsales-alpha@alpha-elec.co.jpDocument No.: 67048Revision: 17-Apr-2015
ASR SeriesPrimary Standard ResistorFEATURES Excellent long-term stability of resistance, less than3 ppm/year Low temperature coefficient, less than 0.2 ppm/ C The resistance value may be specified from 1Ω to10 MΩ Excellent AC characteristics due to non-wirewoundtechnology Compact and sturdy construction designed for easyoperation and storage Certificate of Calibration and Inspection sheetstraceable to NMIJ* are provided at shipment.*NMIJ: National Metrology Institute of JapanMASSApprox. 2.5 kg (5.5 lbs)DESCRIPTIONCONFIGURATION in millimetersThe ASR series is an extremely stable standard resistor.Alpha’s Ni/Cr alloy Bulk Metal Foil technology is usedas the resistive element, providing high stability andlow temperature coefficient. The process of building astandard resistor requires significant experience and agreat degree of skill. Due to our long-term experiencein developing and enhancing ultra stable Bulk Metal Foil technology, we are able to provide products withconsistency of performance under strict quality control.19.05 38.1 19.0536With the extreme stability of this resistor relative totemperature change, the ASR can be used in air withoutoil bath or critical environmental temperature controleliminating added expense and maintenance problems.76112The ASR is designed to be used in a broad range ofenvironments—from a production floor for making precisemeasurements, to a corporate traceability system as acalibration and reference standard.155The resistors are mounted in a compact sturdy box withcover whose construction is designed to protect theresistor and terminals from any .ofNominal AccuracyCoefficient RetraceCalibrationValueppmASR-1R0ppmppm/ 0MΩ 5 10 2.5@ 23 C 5 2 @ 0.2@ 0 23 C 23 0 C23 50 C 23 C23 50 C 23 C 0.5PowerRatingPowerCoefficientWppm/power*0.5 5 30.1 6 1 3Max.Max.Max. Operating StorageWorking Working Working Temp.Temp.Temp.Current VoltageRangeRange 00.313160.101000 C CNumberofTerminals50 50–10 603* Power Power ratingDocument No.: 67022Revision: 30-Mar-2015For any questions, co.jp3
CSR SeriesWorking Standard ResistorFEATURES Usable in air without oil bathWide resistance range available from 1 mΩ to 100 MΩExcellent performance versus costTerminals aligned in a single row for easier wiringand placement Certificate of Calibration and Inspection sheetstraceable to NMIJ* are provided at shipment.*NMIJ: National Metrology Institute of JapanMASSCONFIGURATION in millimetersApprox. 300g (0.66 lbs)DESCRIPTIONThe CSR series has Bulk Metal Foil resistanceelements, which have the same excellent stability andlow temperature coefficient of resistance as the ASRseries—a precision level that cannot be provided byany other resistance material. In addition, the CSR isdesigned for equal ease of use in the laboratory or onthe production floor. It’s construction is designed to givepriority for portability and workability, being used in airwithout an oil bath.CUSTOMIZED SPECIFICATIONSAvailable for any customized resistance value.Contact to our sales department for more StorageTemp.RangeWppm/mW Cppmppm/ Cppm/year1 mΩ 100 10 20CSR-10N10 mΩ 50 5 15CSR-R10100 mΩ 25 2.5 ngTemp.Range .101.00CSR-101100Ω0.033.16CSR-1021 kΩ0.0110.0CSR-1N0 5 1 50.5 0.050 500.1CSR-10310 kΩ0.00331.6CSR-104100 kΩ0.001100CSR-1051 MΩ0.0003316CSR-10610 MΩ 10CSR-107100 MΩ 25www.alpha-elec.co.jp4 5 0.01 100.10.00011000 250.010.000011000For any questions, ls518 283Document No.: 67023Revision: 30-Mar-2015
LSR Series High Power StandardResistorFEATURES For high power measurement Excellent long-term stability Compact size. Usable in air. Low temperaturecoefficient for small resistance values Temperature efficient design to control self-heating Certificate of Calibration and Inspection sheetstraceable to NMIJ* are provided at shipment.*NMIJ: National Metrology Institute of JapanMASSApprox. 600g (1.3 lbs)High Current OptionDESCRIPTIONThe LSR series is developed to meet the requirements ofhigh current / low resistance applications. Bulk Metal Foilresistive elements are used to ensure the best long-termstability and lowest temperature coefficient is achieved.CONFIGURATION in millimetersThe enclosure is made of perforated aluminum to alloweffective temperature dissipation, especially underconditions of high electrical power.The LSR can be used in air without oil bath or coolingunit, it is suitable for a wide range of applications, suchas high precision measurements, calibration in corporatemetrology labs, and a reference for precision powersupplies, etc.HIGH CURRENT OPTIONAbility to change terminal knobs for measuring the powerup to 4W (63A) for 1 mΩ type (see the picture). Add P tothe end of model number, when ordering.Type: LSR-1N0PThe spacing between voltage terminals is 19.05 mm.SPECIFICATIONSSeriesLSR-1N0Temp.Nominal Accuracy Coefficient StabilityValueppmppm/ Cppm1 mΩ 100LSR-10N10 mΩ 50LSR-R10100 mΩ 25Document No.: 67024Revision: 30-Mar-2015 2.5PowerPowerRating CoefficientW 201 104StorageMax.Max.WorkingTemp. Working Working Temp.Range Current VoltageRangeppm/mW 0.025For any questions, contactsales-alpha@alpha-elec.co.jp C0 50AmV31.631.620.02006.32632 C18 28NumberofTerminals4www.alpha-elec.co.jp5
MSR Series Milliohm Meter CalibrationResistorFEATURES Compact, lightweight, portable and easy to operate Excellent performance versus cost Resistive pattern designed to minimize differenceperformance between AC and DC Certificate of Calibration and Inspection sheetstraceable to NMIJ* are provided only for DC operationat shipment*NMIJ: National Metrology Institute of JapanMASS AND SIZE Mass: 150g (0.33 lbs) Size: 50 D 44 H 65 W mmCUSTOMIZED SPECIFICATIONSAvailable for any customized resistance value.Contact to our sales for more details.DESCRIPTIONThe MSR series is a standard resistor whose internalconstruction and terminals are designed to optimizeAC characteristics and minimize the effect of thermo-electromotive force, respectively. The MSR is a compactsuitable standard resistor for daily calibration of milliohmmeters, etc. Although the MS
The ASR series is an extremely stable standard resistor. Alpha’s Ni/Cr alloy Bulk Metal Foil technology is used as the resistive element, providing high stability and low temperature coefficient. The process of building a standard resistor requires significant experience and
