Metrológia teploty

Fluke/Hart Scientific 742A-1 - Resistor, DC Standard (1W)

Fluke/Hart Scientific 742A-1 - Resistor, DC Standard (1Ω)

  • 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

More details

Dostupnosť: Na objednávku
 
Informácie

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. 

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 

3.0 

1.0 

742A-10 

10 

3.0 

1.0 

742A-25 

25 

3.0 

1.0 

742A-100 

100 

3.0 

1.0 

742A-1K 

1K 

2.0 

1.5 

742A-10K 

10K 

2.5 

1.5 

1.0 

742A-100K 

100K 

2.0 

2.5 

742A-1M 

1M 

2.0 

5.0 

742A-10M 

10M 

3.0 

10.0 

742A-7002 

Transit Case (holds two units) 



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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