1404 IET | Alldatasheet
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Long Island, NY IET LABS, INC. in the Gen Rad Tradition www.ietlabs.com TEL: (516) 334-5959 • EMAIL: info@ietlabs.com Primary Standard Capacitor
1404 Series Page 1 of 2
1404 Datasheet October 9 2013
Features: NEW 5 nF and 10 nF now available A national laboratory standard For calibrating working standards Standard for dissipation factor Available in 10, 100 and 1000 pF 20 ppm/year stability, typically better Hermetically sealed in dry nitrogen These capacitors have been designed as primary reference standards of capacitance with which working standards can be compared. IET's 1620A and
1621 Precision Capacitance
Measuring Systems are particu- larly well suited for this purpose and can be conveniently used to accurately calibrate a wide range of working standards in terms of a 1404 Reference Standard Capacitor. IET has expanded on the GenRad 1404 Series with the New 1404-5nF and 1404-10nF Standard Capacitors. These build on the outstanding time- tested performance and stability features of the classical design of the original GenRad 1404's. Model 1404-A 10 nF and 1404-C 10 pF Figure 1 Equivalent circuit showing direct capacitance, CD, and average values of residual inductance, L, and terminal capacitances, CH and CL. See specifi ca- tions for values of residuals In combination with an accurately known external resistor, this capacitor also becomes a standard of dissipation factor. All critical parts of the plate assem- bly are made of invar for stability and low temperature coeffi cient. After heat cycling and adjustment the assembly is mounted in a heavy brass container, which after evacuation, is fi lled with dry nitrogen under pressure slightly above atmospheric and sealed. The container is mounted on an aluminum panel and protected by an outer aluminum case. Each capacitor is subjected to a series of temperature cycles to determine hysteresis and temperature coeffi cients and to stabilize the capacitance. Two locking bnc coaxial connectors are used as terminals (other connec- tors such as 874 type are available as options). The outer shell of one is connected to the case, but the outer shell of the other is left unconnected to permit the capacitor to be used with an external resistor as a dissipation -factor standard.
1404-9701 1404-A, 1000 pF 1404-9702 1404-B, 100 pF 1404-9703 1404-C, 10 pF 1404-5nF 1404-A, 5 nF 1404-10nF 1404-A, 10 nF
ORDERING INFORMATION
Accuracy Short Term Drift Long Term Drift Max Change with Orientation Maximum Voltage Dissipation Factor 1404-A 1404-B 1404-C < ±6 ppm ±5 ppm to a ca- pacitance about 5 ppm above the nominal value less than 2 ppm less than 20 ppm per year 10 ppm and completely reversible 750 V peak < 10 -5 at 1 kHz 1404-5 nF 1404-10 nF ±100 ppm ±500 ppm less than 12 ppm less than 40 ppm per year 15 ppm and completely reversible 100V peak < 10 -5 at 1 kHz Calibration: An A2LA certifi cate of calibration is supplied with each capacitor, giving the measured direct capacitance at 1 kHz, 30 Vac and 23° ±1°C. Temperature Coeffi cient of Capacitance: A measured value with and accuracy of ±1 ppm/°C is given on the certifi cate. Model Temperature Coeffi cient 1404-A 1404-B 2 ±2 ppm/°C from -20°C to +65°C 1404-C 5 ±2 ppm/°C from -20°C to +65°C 1404-5 nF 1404-10 nF 4 ±6 ppm/°C from -20°C to +65°C Temperature Cycling: For temperature cycling over range from -20°C to +65°C , hysteresis (retraceable) is less than 20 ppm at 23°C. Residual Impedance: Model C H CL L 1404-A 1404-B 1404-C 30 pF 28 pF 0.05 µH 1404-5 nF 1404-10 nF 130 pF 127 pF 0.1 µH Terminals: Two BNC coaxial connectors (legacy locking G874 coaxial connectors are available). Outer shell of one connector is ungrounded to permit capacitor to be used with external resistor as a dissipation factor standard. Mechanical: Model Dimensions Weight 1404-A 1404-B 1404-C (16.9 cm H x 17.2 cm W x 20.4 cm D 3.9 kg 8.5 lb 6.4 kg 14 lb Shipping 1404-5 nF 1404-10 nF (23 cm W x 23 cm H x 22 cm D) 9" x 9" x 8.5" 16 kg 35 lb 18 kg 40 lb Shipping Long Island, NY IET LABS, INC. in the Gen Rad Tradition www.ietlabs.com TEL: (516) 334-5959 • EMAIL: info@ietlabs.com Primary Standard Capacitor