These ultra-high-stability capacitors are suitable for calibration of standards requiring an uncertainty of parts in 107, such as the AH2700A.
The 1408 Standard Capacitor includes three standards: 1 pF, 10 pF, and 100 pF.
It maintains its own stability because it has a self-contained air-bath whose temperature is held constant.
The continuously improving accuracy of capacitor calibrations by NIST brings a better knowledge of capacitance to standards laboratories - provided, of course, the laboratories have adequate reference standards. The 1408 Reference Standard Capacitors, with their high stability, are suitable for calibration in parts in 107. The 1616 Precision Capacitance Bridge is highly recommended for accurate calibration of a wide range of working standards from such a 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 environment, it is well adapted for use in laboratories without an oil bath or closely-controlled ambient 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.
Capacitor Value | Frequency | Stability |
1 pF | 400 Hz | ± 10 ppm/year |
1 kHz | ± 4 ppm/year | |
10 pF | 400 Hz | ± 3 ppm/year |
1 kHz | ± 1 ppm/year | |
100 pF | 400 Hz | ± 3 ppm/year |
1 kHz | ± 1 ppm/year |
Nominal values:
1 pF, 10 pF, 100 pF
Calibration Report:
SI traceable calibration data provided
Calibration Conditions:
At 30°C (air-bath temperature)
At 400 Hz & 1 kHz
Electrical:
Dissipation Factor: < 10-5 at 1 kHz
Max Voltage: 750 V
Air-Bath Characteristics:
Temperature: 30°C nominal with stability of 0.01°/year,
<0.005°/hour is ambient temperature is kept within 1°C
Temperature coefficient: 0 + 0.05 ppm/°C from 17 to 29 °C
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 to maintain a constant air-bath temperature even while the unit is in transit.
Power:
105 to 125 V or 210-250 V
50 to 60 Hz
5 W
12 V at 4 A for dc operation, battery connectors are provided on rear
