|
|
|
 |
Fluke DC Resistance
Standards - 742A |
|
|
|
|
DC Resistance Standards
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.
|
 |
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.
|
|
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 Ω |
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 |
|
|
|
|
|
|
Ordering Information |
|
Model |
Description |
|
742A-1 |
Resistor, DC Standard, 1Ω |
|
742A-10 |
Resistor, DC Standard, 10Ω |
|
742A-25 |
Resistor, DC Standard, 25Ω |
|
742A-100 |
Resistor, DC Standard, 100Ω |
|
742A-1K |
Resistor, DC Standard, 1KΩ |
|
742A-10K |
Resistor, DC Standard, 10KΩ |
|
742A-100K |
Resistor, DC Standard, 100KΩ |
|
742A-1M |
Resistor, DC Standard, 1MΩ |
|
742A-10M |
Resistor, DC Standard, 10MΩ |
|
742A-7002 |
Transit Case (holds two units) |
|
1960 |
Cal, DC Standard Resistor |
|
|
|
