1408_9706 电路图.pdf

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1、534 Main Street, Westbury, NY 11590 IET LABS, INC. in the GenRad T TEL: (516) 334-5959 (800) 899-8438 FAX: (516) 334-5988 Con tents p. 2 Applic. pp. 4-8 Selection pp. 9-11 Products pp. 12-87 GenRad prod ucts pp. 50-87 Index p. 89 57 10 pF and 100 pF combination High stability Low voltage coeffi cien

2、t Reference Standard Capacitor 1408-9706 Capacitor Series1408-9706 Capacitor Series Electronic cat/1482/09-15-03 Ultra-high stability. The continuously improv- ing accuracy of capacitor calibrations by NIST brings a better knowledge of capacitance to standards laboratories - provided, of course, the

3、 laboratories have adequate reference standards. The 1408 Reference Standard Ca- pacitors, with their high stability, are suitable for calibration in parts in 107. The 1616 Preci- sion Capacitance Bridge is highly recommended for accurate calibration of a wide range of working standards from such a

4、reference. This unit includes two standards, 10 pF and 100 pF, plus a self-contained air bath whose temperature is held constant to within 0.01 per year to assure the utmost stability of the standards. Since ti carries its own environ- ment, it is well adapted for use in laboratories without an oil

5、bath or closely-controlled ambi- ent temperature or in portable laboratories and calibration centers. The air bath operates from 12 volts so that it is an easy matter to transport it under power at all times. SPECIFICATIONS Nominal Value: 10 pF and 100 pF. Calibration: A certifi cate of calibration

6、is supplied with each capacitor, giving the measured direct capacitance at 1 kHz and at the specifi ed temperature near 30C, the air-bath temperature. The measured value is obtained by a comparison to a precision better than 0.5 ppm with standards whose values are determined and maintained by period

7、ic calibrations made by NIST. Adjustment Accuracy: 5 ppm. Stability: Estimated to be better than 1 ppm per year. Temperature Coeffi cient: 2 2 ppm/C for 100 pF; 5 2 ppm/C for 10 pF. Temperature Cycling: from 0 to 60C, 1 ppm hysteresis at 30C. Electrical: Dissipation Factor: 10-5 at 1 kHz. Voltage: 7

8、50 V max. Residual Impedances: See Figure 1 Fig.1 Value (pF) LH, LL (H) CD (pF) CH (pF) CL (pF) 10 0.05 100 30 28 100 0.05 100 30 28 Terminals: Two locking G874 coaxial connectors or BNC connec- tors; various patch cords available. Air-Bath Characteristics: Temperature: 30C nominal with stability of

9、 0.01C/year, 0.005C/hour if ambient temperature is kept within 1C. Temperature Coeffi cient: 0+0.05ppm/C from 17 to 29C ambient temperature; thermometer well provided for calibration. General: Connectors can be made to the front or the rear as your application dictates. A 12-volt input is provided t

10、o maintain a con- stant air-bath temperature even while the unit is in transit. Power: 105 to 125 V or 210 to 250 V, 50 to 60 Hz, 5 W; 12 V at 0.4 A; for dc operation, battery connectors provided on rear. Mechanical: Dimensions: 22.2 cm H x 21.4 cm W x 40.7 cm D (8.72 x 8.42 x 16); (approx.) Weight: 12 kg (25 lb.) net, 16 kg (34 lb.) shipping; (approx.) ORDERING INFORMATION 1408-9706 10/100 pF Air bath Reference Standard Capacitor RadioFans.CN 收音机爱 好者资料库