Fluke DC Resistance Standards

5420

Features

Convenient air resistors don’t require oil or air baths
Calibrate resistance thermometers and other devices
Includes NIST-traceable calibration data with uncertainty to 1 ppm
Easily transported for on-site resistance calibration

Specifications
Model	Nominal Value W	Stability, ppm 6 Months	Stability, ppm 12 Months	Max Change, ppm from 23°C ±5°C (±ppm)	Calibration Uncertainty, ±ppm
742A-1	1	5	8	3.0	1.0
742A-10	10	5	8	3.0	1.0
742A-25	25	5	8	3.0	1.0
742A-100	100	4	6	3.0	1.0
742A-1K	1K	4	6	2.0	1.5
742A-10K	10K	2.5	4	1.5	1.0
742A-100K	100K	4	6	2.0	2.5
742A-1M	1M	6	8	2.0	5.0
742A-10M	10M	6	9	3.0	10.0
742A-7002	Transit Case (holds two units)

Do you need high-accuracy working standards for precise, on-site resistance calibrations? If you’d like to avoid maintaining traditional standard resistors in oil baths, Hart has a complete assortment of DC air resistors manufactured by Fluke, with Fluke’s proprietary tellurium-copper five-way binding posts.

The Fluke 742A Series covers values from 1 ohm all the way to 10 megohm. These are the finest-quality air resistors you can buy. They’re durable, easy to maintain, and easy to use. 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.

Care has been taken to reduce resistance changes brought about by thermal and mechanical shock. Retrace (shift in resistance) is typically less than 2 ppm after cycling between 0°C and 40°C.

Each of these resistors comes with a NVLAP-accredited report of calibration from Fluke. Accredited recalibrations are available from either Fluke or Hart.

Ordering Information
742A-1	Resistor, DC Standard, 1W
742A-10	Resistor, DC Standard, 10W
742A-25	Resistor, DC Standard, 25W
742A-100	Resistor, DC Standard, 100W
742A-1K	Resistor, DC Standard, 1 KW
742A-10K	Resistor, DC Standard, 10 KW
742A-100K	Resistor, DC Standard, 100 KW
742A-1M	Resistor, DC Standard, 1 MW
742A-10M	Resistor, DC Standard, 10 MW
742A-7002	Transit Case
1960	Cal, DC Standard Resistor

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