Alpha ATS Series

Alpha ATS Series

The ATS series from Alpha Electronics is a resistance transfer standard used to calibrate working standard resistors by using a primary resistor. The ATS series consists of 10 high precision resistors of the same nominal value (R) which are connected in series known as Haymon bridge construction. The ATS unit can be used as a standard resistor due to the low temperature coefficient and high stability features of Alpha Electronics Bulk Metal® foil technology, ensuring very tight matching accuracy.

  • Resistance transfer standard for calibrating standard resistors
  • Uses Bulk Metal® Foil as a resistive element
  • Usable in air without the need of an oil bath due to its superior temperature coefficient
  • Very tight matching accuracy
  • Excellent long-term stability
  • Power rating of 0.01W per resistor element, 0.1W per unit
  • Working temperature range of +23°C ±10°C
An extremely high precision resistance ratio of 1:100 maximum is obtained by using either the ATS-LC lead compensator or the ATS-SC shorting bar. These configurations consist of:
  • connecting the 10 resistors in parallel (1/10*R)
  • connecting the 10 resistors in series (10*R)

The ATS-LC lead compensator and the ATS-SC shorting bar are available as additional options.

The ATS series has a weight of approximately 3kg and dimensions of 180mm x 70mm x 332mm.

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

Alpha ATS Specifications
Specifications
AccuracyAbsolute:
  • ±20 ppm (1Ω-100Ω)
  • ±10 ppm (10Ω-1kΩ up to 100kΩ-10MΩ)
  • ±50 ppm (1MΩ-100MΩ)
Matching:
  • ±5 ppm (1Ω-100Ω up to 100kΩ-10MΩ)
  • ±10 ppm (1MΩ-100MΩ)
Additional Features
  • Resistance transfer standard for calibrating standard resistors
  • Using Bulk Metal® Foil as a resistive element
  • Usable in air without oil bath due to superior temperature coefficient
  • Very tight matching accuracy
  • Excellent long-term stability and usable as a standard resistor
Maximum Power Rating
  • 0.01W per element
  • 0.1W per unit
Maximum Resistance
  • ATS-1E1: 100Ω with 10Ω steps
  • ATS-1E2: 1kΩ with 100Ω steps
  • ATS-1E3: 10kΩ with 1kΩ steps
  • ATS-1E4: 100kΩ with 10kΩ steps
  • ATS-1E5: 1MΩ with 100kΩ steps
  • ATS-1E6: 10MΩ with 1MΩ steps
  • ATS-1E7: 100MΩ with 10MΩ steps
Minimum Resistance
  • ATS-1E1: 1Ω with 10Ω steps
  • ATS-1E2: 10Ω with 100Ω steps
  • ATS-1E3: 100Ω with 1kΩ steps
  • ATS-1E4: 1kΩ with 10kΩ steps
  • ATS-1E5: 10kΩ with 100kΩ steps
  • ATS-1E6: 100kΩ with 1MΩ steps
  • ATS-1E7: 1MΩ with 10MΩ steps
TCRAbsolute:
  • ±5 ppm/°C (1Ω-100Ω)
  • ±1 ppm/°C (10Ω-1kΩ up to 100kΩ-10MΩ)
  • ±10 ppm/°C (1MΩ-100MΩ)
Tracking:
  • ±2.5 ppm/°C (1Ω-100Ω)
  • ±1 ppm/°C (10Ω-1kΩ up to 100kΩ-10MΩ)
  • ±5 ppm/°C (1MΩ-100MΩ)

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 ATS resistance transfer standard 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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