742A Resistance Standards

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  • 742A Resistance Standards
  • 742A Resistance Standards
  • 742A Resistance Standards

Key features

  • High-accuracy working standards for on-site resistance calibration.
  • Small, rugged, and easy to transport.
  • Temperature stability and six-month stability to 2.5 ppm.
  • Temperature range: 18°C to 28°C.
  • Designed to reduce resistance changes caused by thermal and mechanical shock.

Product overview: 742A Resistance Standards

High accuracy working standards for on-site resistance calibration

  • Small and rugged resistance calibrators 
  • No oil or air baths required
  • 18° to 28° C operating range
  • Six-month stability to 2.5 ppm
  • Supplied with temperature characterization

742A Resistance Standards are high accuracy working standards for precision, on-site resistance calibration. Their excellent temperature stability allows them to be used from 18°C to 28°C with typically less than 2 ppm degradation. Using the calibration table supplied with the standards, which lists corrections in 0.5°C increments, this uncertainty can be reduced to near zero. No cumbersome oil or air baths are required.

Because 742A Resistance Standards are small and rugged, they are easy to transport. Care has been taken to reduce resistance changes brought about by thermal and mechanical shock. Retrace (permanent shift in resistance) is typically less than 2 ppm after cycling between 0°C and 40°C.

The 742A-1 1 Ω and the 742A-10k 10 kΩ units are ideally suited for Artifact Calibration of 5700A/5720A Calibrators. The other values can be used to verify the calibration if you desire.

A convenient transit case, designed to hold two standards, is available as an option.

Specifications: 742A Resistance Standards

General Specifications
12 Values from 1Ω to 19 MΩ in x1 and x1.9Best 1 Year Specification:±4 ppm
Operating Temperature18-28°C
Storage Temperature 0-40°C
Retrace Error (hysteresis)23°C-18°C-23°C cycle:Negligible resistance shift
23°C-28°C-23°C cycle:Negligible resistance shift
23°C-0°C-23°C cycle:< 2 ppm resistance shift
23°C-40°C-23°C cycle:< 2 ppm resistance shift
Calibration Documentation17025 accredited report of calibration included
Size8.6 cm H x 10.5 cm W x 12.7 cm D (3.4 in H x 4.15 in W x 5 in D
Weight.68 kg to .91 kg (1.5 lbs. to 2 lbs.) depending on the model

Models: 742A Resistance Standards

742A-1
1 Ω Resistance Standard

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742A-1.9
1.9 Ω Resistance Standard

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742A-10
10 Ω Resistance Standard

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742A-25
25 Ω Resistance Standard

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742A-100
100 Ω Resistance Standard

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742A-1k
1 kΩ Resistance Standard

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742A-10k
10 kΩ Resistance Standard

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742A-19k
19 kΩ Resistance Standard

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742A-100k
100 kΩ Resistance Standard

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742A-1M
1MΩ Resistance Standard

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742A-10M
10 MΩ Resistance Standard

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742A-19M
19 MΩ Resistance Standard

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