Features

• Each device confi gurable to 10R, 1R, and R/10

• Accuracy of transfer better than 1 ppm

• Six models, decade values from

• 1 W/step to 100k W/step

• Establish decade resistances from 0.1 W to 1M W

• Calibration traceable to the SI through an NMI

• IET Labs continues to manufacturer the SR1010 to the

same exacting specs as esi/Tegam

Description

Accuracy and Stability

The SR1010 meets or exceeds all of the requirements for resistance

transfer standards in precision measurement applications. It is easily

confi gured to transfer resistances up or down a decade from their

initial resistance value. When used with the connecting networks and

shorting bars, it provides 1 ppm transfer accuracies.

Each transfer standard contains twelve equal value precision resistors

connected in series by specially designed true 4-terminal junctions.

These special junctions assure that a 4-terminal measurement of a

series of resistors agrees with the sums of the individual resistors in

the series. Accurate parallel connections can be made with the Parallel

Compensation Network and the Shorting Bars connected to the

junctions. These standards can be connected to provide three decade

values: 10 resistors in series, 10R: 9 resistors in series — parallel,

1R: and 10 resistors in parallel, R/10. The part per million accuracy is

assured as the series value is equal to 100 times the parallel value to

better than 1 ppm.

The series — parallel value relative to either the series value or the

parallel value can be found to better than 1 ppm by making a 1:1

comparison with the remaining tenth resistor and a simple calculation.

The accuracy and precision of the individual resistors also make the

Model SR1010 ideal for use as a multi-value standard resistor or

reference voltage divider.

Ideal as a Multi-Value Standard Resistor or Reference Voltage Divider

The high accuracy and precision of the individual resistors make the

SR1010 ideal for use as a multi-value standard resistor or reference

voltage divider. The superior stability of the SR1010 makes it

particularly suitable for calibrating 6-1/2, 7-1/2 and 8-1/2 digit digital

multimeters.

IET's Resistance Technology

IET’s experience in design and manufacture of resistance standards

has made our standards highly respected throughout government and

industry.

The SR1010 uses the same basic design as the SR1030 Transfer

Standard without the use of oil.