IET Labs SRac Series User And Service Manual Download Page 1

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PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT

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TEL: (516) 334-5959 • FAX: (516) 334-5988

www.ietlabs.com

IET LABS, INC.

SRac Series

Resistance Standard

User and Service Manual

Visit www.ietlabs.com for manual revision updates

SRac im/January 2019

Summary of Contents for SRac Series

Page 1: ...ENT Email info ietlabs com TEL 516 334 5959 FAX 516 334 5988 www ietlabs com IET LABS INC SRac Series Resistance Standard User and Service Manual Copyright 2019 IET Labs Inc Visit www ietlabs com for...

Page 2: ...PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT Email info ietlabs com TEL 516 334 5959 FAX 516 334 5988 www ietlabs com IET LABS INC...

Page 3: ...t no charge when returned to IET Changes in this product not approved by IET or application of voltages or currents greater than those allowed by the specifications shall void this warranty IET shall...

Page 4: ...2002 96 EC This product complies with the WEEE Directive 2002 96 EC marking requirements The affixed label indicates that you must not discard this electrical electronic product in domestic household...

Page 5: ...taken Make all connections to the instrument before applying power Note the instrument s external markings described under Safety Symbols DO NOT Operate in an Explosive Atmosphere Do not operate the...

Page 6: ...USED TAKE ALL MEASURES TO AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE CONDUCTORS WHEN USING THIS INSTRUMENT Use extreme caution when working...

Page 7: ...d 100 M 6 3 2 3 Connections for values 100 M 7 3 3 Thermal emf Considerations 7 3 4 Environmental Conditions 7 3 4 1 Operating Temperature 7 3 4 2 Storage Temperature 7 3 5 Shipping and Handling 7 Cha...

Page 8: ...e 1 1 SRac Series Resistance Standard 1 Table 2 1 SRac Specifications 2 Figure 2 1 Sample label affixed to unit 3 Figure 3 1 Connections for values 6 Table 4 1 Replaceable Parts List 9 Figure 4 1 SRac...

Page 9: ...ange of 18 C to 28 C Because of the low temperature coefficient they require no oil or temperature bath The SRac series units are available in values ranging from 1 m to 10 M with custom values availa...

Page 10: ...esistance PCR of 5ppm at rated power due to internal heating Foil resistors have a voltage coefficient VC of 3ppm V SPECIFICATIONS Calibration conditions At 23 C low power traceable to SI units Connec...

Page 11: ...3 SRX SRC Series 3 Specifications...

Page 12: ...e 20 ppm year 0 25 W 10 ppm C 0 5 ppm mW 15 C to 30 C 0 C to 40 C REPORT 82893 Tech 21 Oct 2015 Date CTS 23 5 Temp C Due Cert No 2073 01 Calibrated Resistance R 999 996 48 m Meas Uncertainty 9 6 ppm L...

Page 13: ...ohmmeter CURRENT LO Current return to source e g ohmmeter SENSE HI Measurement point for a four wire ohmmeter SENSE LO Measurement point for a four wire ohmmeter GND Guard or shield Table 3 1 Connect...

Page 14: ...ues and ac values at 1 kHz This also makes calibration easy as the SRac can be calibrated at dc rather than ac For resistance values below 1 M it is recommended to use the dc value for the ac value at...

Page 15: ...one de vice the following should be observed Calibration Interval General Considerations Required Equipment Calibration Procedure 4 3 1 Calibration Interval The recommended SRac Series calibration int...

Page 16: ...International Model 6010C ESI model 242 242A 242C or 242D Ahigh precision high stability digi tal multimeter e g Fluke 8508A along with a set of resistance stan dards for ratio mode 4 3 4 Calibration...

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