Standard Resistance Reference or Working Standards SRX-SRC Series Page 1 of 2 Economical high performance SRX SERIES SRC SERIES Designed for use as a reference or work- Economical high re sis tance, high resistance standards. ing standard in in dus tri al, re search, and voltage stan dards for ap pli ca tions re quiring v alues from 190 M up to ed u ca tion al laboratories. Features: 10 T. SRC Maximum Voltage: 5000 V Very stable - as low as 10 ppm/yr Excellent temperature coe cient - as low as 1 ppm/C Rugged Wide range of values - 1 m to 10 T Custom values are available Op onal transit case High voltage opera on - up to 5000 V for SRC series SRX Series Resistance Standard 190 k and under SRC Series Resistance Standard Two Terminals with Kel-F Washers and Guard Terminal SRX Series Resistance Standard 1 M and over SPECIFICATIONS Calibration Conditions: Transit Case: Optional Model SRC-100 light weight transit case At 23C, low power, traceable to SI. with handle, suitable for transporting and storing Connections as indicated in table. two units. The case provides mechanical protec- tion and insulation from temperature chang es Terminals: during trans por ta tion or shipping. Gold plated, tellurium copper, high current, heavy duty,low thermal-emf binding position standard 3/4 inch Optional Model SRC-100-5 light weight transit spacing. A case GROUND terminal is provided on all case with handle, suitable for transporting and stor- units. ing 5 SRC/SRX resistance standards. Dimensions: 8.6 cm H x 10.5 cm W x 12.7 cm D (3.4 x 4.15 x 5 ) Environmental Conditions: Operating Conditions: 10C to 40C Storage Conditions: -40C to 70C SRC-100-5 Lightweight transit case for 5 standards IET LABS, INC. in the GenRad Tradition www.ietlabs.com Long Island, NY TEL: (516) 334-5959 EMAIL: info ietlabs.com IET cat/SRX/04/13/2016Standard Resistance Reference or Working Standards SRX-SRC Series Page 2 of 2 SPECIFICATIONS Initial Calibration Stability Power Max. Max. Model Nominal Adjustment to Uncertainty Tempco Resistor Max. Power* 1 year Coef.** Voltage Current Terminals SRX- () Nominal (Typical) (ppm/C) type (W) (ppm) (ppm/mW) (V) (A) (ppm) (ppm) 0.001 0.001 200 200 50 20 0.2 0.1 0.015 14 A Manganin 0.0019 0.0019 200 200 50 20 0.38 0.1 0.03 14 A strip 0.002 0.002 200 200 50 20 0.4 0.1 0.02 14 A 0.01 0.01 200 100 50 20 0.2 0.1 0.15 4.5 A 0.019 0.019 200 100 50 20 0.38 0.1 0.3 4.5 A Manganin wire 0.1 0.1 200 20 50 20 0.2 0.1 0.3 1.4 A 0.19 0.19 200 20 50 20 0.38 0.1 0.6 1.4 A 1120 10 20 10 0.25 0.5 0.5 0.5 A 1.9 1.9 20 10 20 10 0.25 0.5 0.7 0.36 A 10 10 10 5 10 3 0.1 0.15 1 0.1 A 4 bp s + gnd 19 19 10 5 10 3 0.1 0.15 1.4 70 mA 50 50 10 5 10 1 0.1 0.05 2.3 45 mA 100 100 10 5 10 1 0.1 0.05 3 30 mA 190 190 10 5 10 1 0.1 0.05 4.4 23 mA Hermeti- 1K 1 k 10 5 10 1 0.1 0.05 10 10 mA 1.9K 1.9 k 10 2 10 1 cally sealed 0.1 0.05 14 7 mA 10K 10 k 10 2 10 1 wirewound 0.1 0.05 30 3 mA 19K 19 k 10 2 10 1 0.1 0.05 43 2.2 mA 100K 100 k 10 2 10 1 0.1 0.05 100 1 mA 190K 190 k 10 2 10 1 0.1 0.05 140 0.7 mA 1M 1 M 20 5 15 3 0.1 0.15 316 0.3 mA 1.9M 1.9 M 20 5 15 3 0.1 0.15 440 0.23 mA 2 bp s + gnd 10M 10 M 20 10 20 5 0.1 0.25 2000 0.1 mA 19M 19 M 20 10 20 5 0.05 0.7 5000 50 A Precision thick lm resistors 2 bp s + gnd 100M 100 M 50 15 20 5 0.01 1.2 5000 10 A sealed in a and guard case *Maximum Power is speci ed for no change in resistance value beyond stated stability. See ** Power Coef cient note for maximum rated power. **Power Coef cient: SRX units with hermetically sealed wirewound resistors have a maximum rated power of 1.0 W. Operation at values higher than 0.1 W will cause self-heating effects on the order of 50 C/W, assuming a 23C ambient temperature. This will cause a reversible change in resistance beyond stated stability. Initial Calibration Model Nominal Adjustment to Uncertainty Stability Tempco Resistor Max. Voltage Terminals SRC- () Nominal (Typical) 1 year (ppm) (ppm/C) type (V) (ppm) (ppm) 190M 190 M 0.1% 30 500 25 1G 1 G 0.5% 100 500 50 1.9G 1.9 G 0.5% 100 500 50 10G 10 G 0.5% 200 500 50 Precision thick 19G 19 G 0.5% 500 500 50 2 bp s + gnd and lm resistor 5000 100G 100 G 0.5% 900 500 50 guard sealed in a case 190G 190 G 1% 900 500 50 1T 1 T 2% 2500 500 100 1.9T 1.9 T 2% 2500 1000 200 10T 10 T 3% 10000 2000 300 ORDERING INFORMATION Standard model Select from table above Custom value SRX-XXX or SRC-XXX Transit case for SRL units SRC-100, for 2 units SRC-100-5, for 5 units Options: Triax and bnc terminals are also available Combination units in single housing available IET LABS, INC. in the GenRad Tradition www.ietlabs.com Long Island, NY TEL: (516) 334-5959 EMAIL: info ietlabs.com IET cat/SRX/04/13/2016