IETLAB SR1 Calibration Resistor (50 ppm; 0.01 Ω ~ 10 MΩ)

  • Manufacturer: IET LAB
    Model: SR1 Series
    Origin: USA
    Guarantee: 12 month
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(Full specifications can be found on datasheet)

New Design, With Improved Specifications
Versatile working Calibration Resistor
Laboratory standard of high accuracy and stability
Adjusted to within 20 ppm of nominal
50 ppm long-term accuracy for most values

Details

datasheet

NEW DESIGN, IMPROVED SPECIFICATIONS

For a wider range of resistance values with similar performance at the same price consider our SRX Series

The Model SR1 Calibration Resistors is a laboratory standard of high accuracy and stability. The resistance of most values is initially adjusted to an accuracy of 20 ppm of nominal, with long-term accuracy guaranteed to better than 50 ppm. Other values have initial accuracy from 50 ppm to 200 ppm.

Model SR1 Calibration Resistor has been constructed to meet today’s high standards of performance. The resistance wire used is a modern alloy with excellent stability, an extremely low temperature coefficient over a wide range of temperatures, and very low thermal EMF to copper. A unifilar winding on a flat mica card is used to minimize both series inductance and shunt capacitance. The durable aluminum case provides electrostatic shielding. Gold plated terminals reduce connection errors.

Terminals appear on the top of each unit. They are also brought out the bottom of the case on removable banana plugs. This allows plugging two or more units together in either series or parallel for a wide variety of resistance values. Four-terminal resistance measurements are easily made by using the banana plugs on the bottom of the case as two of the terminals. 0.01 Ω and 0.1 Ω values have four terminals on the top and should only be used in four-wire configurations. For three-terminal or five-terminal guarded measurements, a binding post on top and a banana plug on the bottom provide connections to the case.

SPECIFICATIONS

Nominal Value

Model

Number

Adjustment to nominal

Stability per year

Calibration
Uncertainty

Temperature
coefficient

Power
coefficient

Max power

Max

current

Max

voltage

Terminals

0.01 Ω

SR1-0.01

200 ppm

100 ppm

50 ppm

20 ppm/°C

0.1 ppm/mW

2 W

14 A

0.15 V

4 bp's + gnd

0.1 Ω

SR1-0.1

200 ppm

20 ppm

50 ppm

20 ppm/°C

0.1 ppm/mW

1 W

3.0 A

0.3 V

4 bp's + gnd

1 Ω

SR1-1

20 ppm

10 ppm

20 ppm

10 ppm/°C

0.5 ppm/mW

0.25 W

0.5 A

0.5 V

4 bp's + gnd

10 Ω

SR1-10

10 ppm

5 ppm

10 ppm

3 ppm/°C

0.15 ppm/mW

0.1 W

0.1 A

1 V

4 bp's + gnd

100 Ω

SR1-100

10 ppm

5 ppm

10 ppm

1 ppm/°C

0.05 ppm/mW

0.1 W

30 mA

3 V

4 bp's + gnd

1

SR1-1k

10 ppm

2 ppm

10 ppm

1 ppm/°C

0.05 ppm/mW

0.1 W

10 mA

10 V

4 bp's + gnd

10

SR1-10k

10 ppm

2 ppm

10 ppm

1 ppm/°C

0.05 ppm/mW

0.1 W

3 mA

30 V

4 bp's + gnd

100

SR1-100k

10 ppm

2 ppm

10 ppm

1 ppm/°C

0.05 ppm/mW

0.1 W

1 mA

100 V

4 bp's + gnd

1 MΩ

SR1-1M

20 ppm

5 ppm

15 ppm

3 ppm/°C

0.15 ppm/mW

0.1 W

0.3 mA

316 V

2 bp's + gnd

10 MΩ

SR1-10M

20 ppm

10 ppm

20 ppm

5 ppm/°C

0.25 ppm/mW

0.1 W

0.1 mA

2000 V

2 bp's + gnd

 

Calibration conditions:

At 23°C, low power, traceable to SI

<1 MΩ: Five-wire

≥1 MΩ: Three-wire

Terminals:

Gold-plated, tellurium-copper, low-thermal-emf binding posts on standard 3/4 inch spacing. A GROUND terminal is provided on all units

Mechanical information:

Dimensions: 10.2 cm W x 8.9 cm H x 14.0 cm D(4.0" W x 3.5" H x 5.5" D)
Weight: 0.9 kg (2 lbs)


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