Alpha MSR Series

Alpha MSR Series

The MSR series from Alpha Electronics offers a compact standard resistor suitable for the calibration of low resistance milliohm meters. The internal construction and connection terminals are designed to optimize AC characteristics and minimize the effect of thermoelectromotive force. Alpha's Bulk Metal® Foil resistive elements are used to ensure the best long-term stability and lowest temperature coefficients are achieved. The MSR calibration resistor is a cost effective and simple product, offering both high stability and low temperature coefficient.

  • Compact standard resistor for low resistance calibration
  • Compact, lightweight, portable and easy to operate
  • Excellent performance versus cost ratio
  • Resistive pattern designed to minimize difference performance between AC and DC
  • Standard resistance values of 0.001Ω, 10mΩ and 100mΩ available as well as custom resistances
  • Maximum working voltage of up to 0.01V (model MSR-1N0)
  • Maximum working current of up to 10A (model MSR-1N0)
  • Maximum power rating of 0.1W
  • Maximum working temperature of +50°C
  • Storage temperature range of 0 to +50°C
  • 5 terminals

The MSR is a compact suitable standard resistor for daily calibration of milliohm meters, etc. Although the MSR series is a low cost, easy to use product, it offers both high stability and low temperature coefficient. The MSR is most suitable as a standard resistor to be used on the job site.

The MSR series has a weight of approximately 150g and dimensions of 50mm x 44mm x 65mm.

The below table gives the full specifications for each model available of the Alpha MSR series:

Alpha MSR Specifications
Specifications
Accuracy
  • ±500 ppm (0.001Ω)
  • ±200 ppm (0.01Ω and 0.1Ω)
Additional Features
  • Compact standard resistor for low resistance calibration
  • Compact, lightweight, portable and easy to operate
  • Excellent performance versus cost
  • Resistive pattern designed to minimize difference performance between AC and DC
  • Certificate of Calibration and Inspection sheets traceable to NMIJ (National Metrology Institute of Japan) are provided only for DC operation at shipment
Maximum Power Rating
  • 0.1W
Maximum Resistance
  • 0.1Ω
Minimum Resistance
  • 0.001Ω
TCR
  • ±15 ppm (0.001Ω)
  • ±10 ppm (0.01Ω)
  • ±5 ppm (0.1Ω)

We are pleased to provide you with a range of additional content including videos, product datasheets, case studies, white papers and application notes for your reference. Please see below for the latest content available:

 

 

DOCUMENTATION
PDF DocumentAlpha Electronics MSR milliohm meter calibration resistor series datasheet
PDF DocumentAlpha Electronics traceability chart information for their standard resistor offerings
PDF DocumentAlpha Electronics calibration information and case options for their standard resistor offerings
PDF DocumentAlpha Electronics additional services and custom products available to compliment their standard resistor ranges
PDF DocumentAlpha Electronics standard resistors databook, covering all models they have to offer

 

 

 

VIDEOS
Resistor Stability Put to the Test (Demo Video)

In this video, host Richard Zuratt from VPG puts the stability of the three major resistor technologies — foil, thin, and thick film — to the test. Each resistor type is subjected to an overload pulse and its change in resistance value is recorded. Due to the homogeneous nature of the VPG Bulk Metal® Foil resistor, it is the only of the three to experience no change from the high power pulse. This demonstrated performance makes foil resistors the technology of choice for critical applications where long-term stability and survivability are paramount.
A head to head comparison of the survival rates of precision thin film nichrome (NiCr) resistors versus VFR Bulk Metal Foil resistors in a high humidity environment.

All resistors that are based on nichrome, which is a category that includes both thin film devices and Bulk Metal Foil resistors, are susceptible to electro-chemical corrosion or etching when placed in a high humidity environment and powered with a very low wattage. But since the nichrome element of a Bulk Metal Foil resistor is hundreds of times thicker than the element in a thin film device with the same value, it will last much longer under these conditions. This video shows the actual etching process and survival times for thin film and foil nichrome resistive elements as they are tested in 100% humidity conditions.
Comparison Testing of Chip Resistor Technologies Under High Vibration

Surface-mount resistors suffer physical stresses when exposed to high vibration or thermally unstable environments. Failure modes commonly occur in welds, solder joints, connectors, and terminations, ultimately resulting in circuit failure. In this demonstration, vibration-table-mounted boards are subjected to ±2° deflection 25 times per second and monitored for any ΔR > 0.1%. All the chip resistors failed in 2 to 12 minutes (8K to 16K cycles). But the Alpha MPP molded Bulk Metal® Z-Foil resistor with flexible terminations experienced over a million cycles with no change in resistance.
VIDEOS
Resistor Stability Put to the Test (Demo Video)

In this video, host Richard Zuratt from VPG puts the stability of the three major resistor technologies — foil, thin, and thick film — to the test. Each resistor type is subjected to an overload pulse and its change in resistance value is recorded. Due to the homogeneous nature of the VPG Bulk Metal® Foil resistor, it is the only of the three to experience no change from the high power pulse. This demonstrated performance makes foil resistors the technology of choice for critical applications where long-term stability and survivability are paramount.
A head to head comparison of the survival rates of precision thin film nichrome (NiCr) resistors versus VFR Bulk Metal Foil resistors in a high humidity environment.

All resistors that are based on nichrome, which is a category that includes both thin film devices and Bulk Metal Foil resistors, are susceptible to electro-chemical corrosion or etching when placed in a high humidity environment and powered with a very low wattage. But since the nichrome element of a Bulk Metal Foil resistor is hundreds of times thicker than the element in a thin film device with the same value, it will last much longer under these conditions. This video shows the actual etching process and survival times for thin film and foil nichrome resistive elements as they are tested in 100% humidity conditions.
Comparison Testing of Chip Resistor Technologies Under High Vibration

Surface-mount resistors suffer physical stresses when exposed to high vibration or thermally unstable environments. Failure modes commonly occur in welds, solder joints, connectors, and terminations, ultimately resulting in circuit failure. In this demonstration, vibration-table-mounted boards are subjected to ±2° deflection 25 times per second and monitored for any ΔR > 0.1%. All the chip resistors failed in 2 to 12 minutes (8K to 16K cycles). But the Alpha MPP molded Bulk Metal® Z-Foil resistor with flexible terminations experienced over a million cycles with no change in resistance.

This product is available fully compliant to the RoHS EU directive 2011/65/EU.

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