Andeen-Hagerling AH 2500A Overview

The AH 2500A offers unparalleled stability, resolution and accuracy in a capacitance/loss1 bridge (whether manual or automatic). Its numerous state of the art features make it an exceptionally user friendly instrument. The precision and ease of use of the 2500A are creating new applications in science, engineering and production in a range of industries.

The Model 2500A measures capacitance and loss in medium- and high-impedance ranges, and thus allows using three terminal rather than five terminal connections to the unknown. Its unmatched precision is the result of a uniquely designed ratio transformer which is the culmination of 15 years of custom bridge design and manufacture. Equally important is the unique temperature-controlled, fused silica capacitance standard which allows extremely high measurement stability and immunity to mechanical shock. These elements combine to form a true bridge operating at one kilohertz to give capacitance results which are independent of the exact test frequency.

Features:

Accuracy of 5 ppm (or 3 ppm with Option E)

Stability better than 1 ppm/year (or 0.5 ppm/year with Option E)

Resolution of 0.5 attofarad (.000 0005 pF) and 0.15 ppm (or 0.5 aF and 0.07 ppm with Option E)

Temperature Coefficient of 0.03 ppm/°C (0.01 ppm/°C with Option E)

Measures extremely low loss down to a dissipation factor of 1.5x10-8 tan delta, a conductance of 3x10-7 nanosiemens or a resistance up to 1.7x106 gigohms

Full precision measurements in less than 0.5 second and repeated measurements on the same sample in less than 40 milliseconds

Both capacitance and loss ranges cover negative values to allow for unusual samples or three terminal networks

Three terminal BNC connections minimize connector costs and number of cables

Commutation (test signal reversal) to minimize external power line or other periodic signal pickup

Autoranging

IEEE-488 and RS-232 interfaces included; external device can serve as controller or logger

Programmable features can eliminate the need for an external controller

Full or abbreviated English language commands and error messages

Large, variable brightness, eight digit display of capacitance and loss

Deviation measurements of capacitance, loss or both

Zero correction of test fixture capacitance and loss

External DC bias up to ±100 volts

External trigger capability

Automatic internal calibration

NIST traceable calibration

Self test diagnostics on power-up

Please note: The non-option-E version of the AH2500A has been replaced by the AH2550A bridge. Please refer to the AH2550A page on this site.

Andeen-Hagerling AH 2500A All Available Options

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