Description:
The whole of precision. The 1621 represents the fi rst major improvement in nearly a decade in ultraprecise laboratory capacitance intercomparisons and dielectric measurements. It is a completely self-contained system capable of capacitance measurements in increments as small as 0.1 aF (10-7 pF) and conductance measurements in increments as small as 100 aS (10-10 μS; equivalent to a shunt resistance of 1010 MΩ). Measurements are three terminal, with 2- or 3-terminal connection, and provision is also made for the connection of an external standard for comparison measurements. Such capability and precision are usually accompanied by restricted frequency and complex operation. The 1621, however, avoids these diffi culties. Little degradation of performance occurs from 10 Hz to 10 kHz and operation to 100 kHz is possible. Balances are achieved by in-line readout lever switches-easily adjusted and read correctly. All digits of capacitance and conductance, as well as pertinent multipliers, are also provided by BCD
coded contact closures, available* at rear-panel connectors for use by printers or data-processing equipment.
Three integrated units. The 1621 is an assembly of three integrated instruments: A precision ratio-arm bridge, a highly stable oscillator, and an extremely sensitive detector. Most of the bridge‛s internal standards are enclosed in an insulated housing to reduce the effects of ambient temperature changes; unused standards are disconnected to reduce shunt capacitance at the detector input. The oscillator provides up to 125 V or 5 A for suffi cient signal to be detected even with unbalances as small as one part in 108 of 10 pF. The detector contains three meters to help you speed the balance: One displays the magnitude and the other two simultaneously display the in-phase and quadrature components of any unbalance.
Features:
10-7 pF to 10 μF
12-digital readout, 10-ppm basic accuracy
10-10 μS to 1000 μS
5-digital readout, 0.1% basic accuracy
3-terminal measurements with 2- or 3- terminal con-nection
comparison measurements
simple lever balance with in-line readout
Frequency: 10 Hz to 100 kHz.
Supplied: 1616 Precision Capacitance Bridge, 1316 Oscillator, 1238 Detector, all necessary interconnection cables, and power cord.
Available: 1408 REFERENCE STANDARD CAPACITORS (10 pF and 100 pF) for calibration.
Power: 100 to 125 and 200 to 250 V, 50 to 60 Hz, 51 W.
Mechanical: Bench or rack models.
DIMENSIONS:
Bench: 61.6 cm H x 50.2 cm W x 38.1 cm D (24.25" x 19.75" x 15"),
Rack: 53.1 cm H x 48.3 cm W x 29.1 cm D (20.91" x 19" x 11.44").
WEIGHT:
Bench: 48 kg (105 lb) net, 64 kg (140 lb) shipping;
Rack: 41 kg (90 lb) net, 57 kg (125 lb) shipping.
