The AH2700A measures capacitance and loss in medium- and high-impedance ranges, and thus allows using three-terminal rather than five-terminal connections to the DUT (Device Under Test). Its unmatched precision is the result of a uniquely designed ratio transformer which is the culmination of over 40 years of 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 50 Hz - 20 kHz to give capacitance/loss results which are independent of the exact test frequency.
Measures extremely low loss down to a dissipation factor of 1.5x10-8 tan d, a conductance of 3x10-7 nanosiemens or a resistance up to 1.7x106gigohms
Frequency | Accuracy | Stability | Temperature Coefficient | Resolution | |
kHz | ppm | ppm/year | ppm/°C | aF | ppm |
0.1 | ±9 | ±<1.9 | ±0.07 | 16 | 0.8 |
1 | ±5 | ±<1.0 | ±0.035 | 0.8 | 0.16 |
10 | ±11 | ±<1.9 | ±0.07 | 2.4 | 0.5 |
Front Panel Display Limitations:
(The front panel display may further limit the range and resolution of the capacitance and loss.)
Capacitance: 0.1 aF is best display resolution for C and CS.
Loss: G: 10-7 nS is best conductance display resolution.
D: 10-7 is best dissipation display resolution.
RS: 10-7 kΩ is best series resistance display resolution.
RP: 10-7GΩ is best parallel resistance display resolution.
Remote Device Reporting Limitations:
Capacitance: 0.01 aF is best resolution for C and CS.
Loss: G: l0-8 nS is best conductance resolution.
D: 10-8 is best dissipation resolution.
RS: 10-7 kΩ is best series resistance resolution.
RP: 10-8 GΩ is best parallel resistance resolution.
Frequencies: 50, 60, 70, 80, 100, 120, 140, 160, 200, 240, 300,
400, 500, 600, 700, 800 Hz and 1.0, 1.2, 1.4, 1.6, 2.0, 2.4, 3.0,
4.0, 5.0, 6.0, 7.0, 8.0, 10, 12, 14, 16 and 20 kHz ± 0.0025%.
Sensitivity to changes in power line voltage:
Capacitance: ± 0.002 ppm per 1% change in line voltage.
Loss: Not measurable.
DC Bias: Up to ±100 volts may be applied to the DUT through the external DC bias input.
AC Test Signal Voltages: Any voltage from 0.0003 to 15 V may be entered to a resolution of 0.1%. The available ranges for a given entered voltage are on the line in Table 1 having the next highest voltage. The AH2700A will automatically use the lesser of the user's selected voltage or the highest voltage listed
in the table which provides sufficient range to be able to measure the capacitance and loss of the DUT. The voltages listed have tolerances of ±5%.
Temperature range: 0° to 45°C while operating
-40° to +75°C while in storage
Humidity: 0 to 85% operating relative humidity, non-condensing.
0 to 60% storage relative humidity, non-condensing.
Power requirements: 25 watts, 48 to 440 Hz, 85 to 115, 102 to 138, 187 to 253 and 204 to 276 volts rms
Packaging: The instrument is 3.5 inches (8.9 cm) high and 15 inches (38.1 cm) deep behind the front panel. Hardware for rack mounting and a bail for bench top use are provided.
Weight: 18 pounds (8.2 kg)
Safety and EMC conformity: conforms to EN61326:1998 and EN 61010-1: 1993/A2: 1995
Patents: The AH2700A is protected by U.S. Patent No.4,772,844, 6,204,673 and 6,987,391
Warranty: The AH2700A is covered by a three year warranty.
Forward and return shipping is covered during the first three months of the warranty.