Alpha ADR 1-Dial Series

Alpha ADR 1-Dial Series

The ADR 1-dial resistance box series from Alpha Electronics offers a range of standard resistors which are ideally suited for repetitive daily work. The single dial system means the resistance is easily switched from one value to another. This greatly improves work efficiency and helps to avoid mistakes, which may happen when using a 6-dial decade standard resistor. They are ideally suited for RTD simulation for platinum (Pt) related products and conductive meters.

  • Fully customisable 1-dial resistance box (up to 24 resistance values)
  • Up to 5-digit resistance values on switching contacts may be specified
  • Resistance values available from 1Ω up to 1MΩ
  • Improved work efficiency and elimination of careless mistakes
  • Lightweight, compact size
  • High precision
  • High stability

The resistance elements utilize Bulk Metal® Foil technology and the connections to the rotary switch are made by using 4-terminal junctions. This ensures that high precision, high stability and low temperature coefficients are achieved.

The ADR-1xxx 1-Dial resistance box is fully customisable. Up to 24 different resistance values can be set into the box.

The ADR-1xxx series has a weight of approximately 1kg and dimensions of 100mm x 150mm x 80mm.

The below table gives the full specifications available for the Alpha ADR 1-dial resistance box series:

Alpha ADR 1-Dial Specifications

Tolerance and temperature coefficient varies with resistance values.

Specifications
Additional Features
  • Fully customisable 1-dial resistance box
  • Up to 24 resistance values in a single device
  • Up to 5-digit resistance values on switching contacts may be specified
  • Improved work efficiency and elimination of careless mistakes
  • Lightweight, compact size
  • High precision, high stability
Maximum Resistance
  • 1MΩ
Minimum Resistance
Number of Terminals and Contacts
  • Contacts: maximum 24
  • Terminals: 2 to 5
TCR
  • ±2.5 ppm/°C
  • ±5 ppm/°C
Tolerance
  • ±0.02%
  • ±0.05%
  • ±0.1%

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 ADR 1-dial resistance box (RTD simulator) 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.

RoHS Compliance

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

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