SCA IET | Alldatasheet

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Technical content

IET LABS, INC. in the Gen Rad Tradition www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988 SCA Series Page 1 of 3 Standard Capacitance Reference or Working Standards SCA Data Sheet/ Dec. 2022 Environment: Operating: +10 to +40°C, <80% RH Storage: -20 to +65°C Calibration Conditions: Calibrated at 23°C, <50% RH, Traceable to SI Transit Case: (see page 3) High-stability, cost-effective capacitance standards with low temperature coeffi cients, low losses, and a wide range of values. Specifi cations Nominal value Model Adjustment to nominal Temperature coeffi cient (ppm/°C) Calibration Conditions Dissipation (typical) Stability (per year) Max voltage Terminals Capacitor type Peak (V) Max Frequency 1 pF SCA-1pF ±0.1 pF +20 to +40 £ 15 Vac Parallel Model 1 kHz AH2700A or equivalent 0.002 ±0.1 pF 500 10 kHz 2 bnc connectors + gnd 10 pF SCA-10pF ±0.1 pF +20 to +40 0.002 ±0.1 pF 500 10 kHz 19 pF SCA-19pF ±0.1 pF +20 to +40 0.001 ±0.1 pF 500 10 kHz 100 pF SCA-100pF ±0.1 pF 20 0.0005 ±0.1 pF 500 10 kHz Silvered mica mechanically stabilized hermetically sealed 190 pF SCA-190pF ±0.1 pF 20 0.0005 ±0.1 pF 500 10 kHz 1.0 nF SCA-1nF ±0.02% 20 0.0003 ±100 ppm 500 10 kHz 1.9 nF SCA-1.9nF ±0.02% 20 0.0003 ±100 ppm 500 10 kHz 10 nF SCA-10nF ±0.02% 20 0.0003 ±100 ppm 500 10 kHz 2 binding posts + gnd 19 nF SCA-19nF ±0.02% 20 0.0003 ±100 ppm 500 10 kHz 100 nF SCA-100nF ±0.02% 20 0.0003 ±100 ppm 500 10 kHz 190 nF SCA-190nF ±0.02% 20 0.0003 ±100 ppm 500 10 kHz 1 µF SCA-1µF ±0.02% 20 0.0002 ±100 ppm 500 10 kHz 1.9 µF SCA-1.9µF ±0.02% 20 1 Vac Series Model 1 kHz 0.0002 ±100 ppm 100 10 kHz 4 binding posts + gnd Metallized polypropylene sulfi de hermetically sealed 5 µF SCA-5µF ±0.02% ±50 0.0005 ±200 ppm 50 10 kHz 10 µF SCA-10µF ±0.04% ±50

1 Vac

(1 kHz data included) 0.0005 ±200 ppm 22 Vrms† 1 kHz 19 µF SCA-19µF ±0.04% ±50 0.0005 ±200 ppm 44 Vrms† 1 kHz 100 µF SCA-100µF ±0.05% ±50 0.001 ±500 ppm 22 Vrms† 1 kHz 190 µF SCA-190µF ±0.05% ±50 0.001 ±500 ppm 22 Vrms† 1 kHz 1,000 µF SCA-1000µF ±0.4% -150 0.001 ±500 ppm 22 Vrms† 1 kHz 5,000 µF SCA-5000µF ±2% -150 0.001 -- 22 Vrms† 1 kHz Polypropylene 10,000 µF SCA-10000µF ±2% -150 0.001 -- 22 Vrms† 1 kHz XXX F SCA-XXX customer-selected value and power specifi cations † Maximum allowable Vrms; subject to maximum Vdc = 50 V and max Vrms = (39000/f) for C = 10 µF; (26000/f) for C = 19 µF; (13000/f) for C £100µF , where f = frequency (in Hz).

  • High-accuracy and stability
  • Capacitance values from 1 pF to 10,000 µF
  • Custom values available
  • Mechanically stabilized capacitors
  • Stability: <100 ppm/year
  • Excellent TC: as low as 10 ppm/°C
  • Low loss: D as low as 20 ppm
  • SCA-1nF-8588A available for direction connection to the Fluke 8588A to calibrate the 1 nF capacitance range Mechanical: Nominal Values Dimensions Weight 1 pF < 1 µF 8.6 cm H x 10.5 cm W x 12.7 cm D 1 µF (only) 14.3 cm H x 8.3 cm W x 6.9 cm D >1 µF £ 190 µF 8.6 cm H x 10.5 cm W x 12.7 cm D 1,000 µF 31 cm W x 8.9 cm H x 10.2 cm D 5,000 µF 53.3 cm W x 27.3 cm H x 44.5 cm D 27.2 kg (60 lb) 10,000 µF 36.3 kg (80 lb) SCA-1nF-8588A 12 cm H x 8.6 cm W x 9.5 cm D SCA Capacitance Standard

IET LABS, INC. in the Gen Rad Tradition www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988 SCA Series Page 2 of 3 Standard Capacitance Reference or Working Standards SCA Data Sheet/ Dec. 2022 Connection Schematics for Low Values Low-value SCA's have 3 terminals -- HI and LO , and GND . The capacitance of the unit is shown as CHL. There is additional capacitance to the case shown by CHG and CLG. These ca- pacitances will add to CHL unless the 3rd terminal, GND, is connected to the GUARD of the measuring instrument. CHL CLG CHG LOW HIGH GND Low Value SCA Units SCA-100nF (1.9 nF< values <1µF) SCA-1nF (values £1.9 nF) Connection Schematics for High Values High-value SCA's have 5 binding posts -- HI CURRENT , HI SENSE , LO CURRENT , LO SENSE , and GND . This 4-terminal connection circuit has special wiri ng and low-resistance conductors to minimize dissipa- tion and parasitic inductance, and improve frequency characteristics. CHL CLG CHG CURRENT LOW SENSE LOW CURRENT HIGH SENSE HIGH GND SCA-10000µFSCA-1000µF SCA-100µF (values >1µF) SCA-1µF

IET LABS, INC. in the Gen Rad Tradition www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988 SCA Series Page 3 of 3 Standard Capacitance Reference or Working Standards SCA Data Sheet/ Dec. 2022 Transit cases SRC-100 Transit Case for 2 units SRC-10-n Transit Case for n units (5 units shown) Optional Model SRC-100 or SRC-10-n lightweight transit cases provides mechanical protection and insulation from temperature chang es dur ing trans por ta tion or shipping. It is suitable for transporting and storing two or more units.

Ordering Information

Capacitance Standard Select from table above Custom value SCA-XXX Transit case for SCA units SRC-100, for 2 units; SRC-10-n, for n units For deleted case version, add " - DC " at the end of the part number SCA-1nF-8588A Direct Connection