Keithley 6514 System Electrometer: A Precision Solution for High Resistance and Low Current Measurement
In the fields of semiconductor characterization, materials science research, and high-end component testing, the accurate measurement of extremely low currents and very high resistance is a fundamental yet critical challenge. The Keithley 6514 System Electrometer is a benchmark instrument designed specifically to meet this challenge. With its exceptional sensitivity, low-noise design, and integrated features, it has become the preferred tool for researchers and engineers working with picoampere-level current measurements and resistance measurements exceeding 10^16 Ω.
Maintaining the specified measurement accuracy and stability of such high-sensitivity instruments is crucial for the reliability of experimental data. The?Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department?provides professional calibration and maintenance services to support these precision measurement devices, ensuring ongoing measurement accuracy.
The 6514 System Electrometer: Defining the Benchmark for Low-Level Measurement
The 6514 is more than just an electrometer; it is a precision measurement platform integrating multiple functions such as a voltage source, ammeter, and charge meter.
Core Performance and Technical Features:
Extremely High Current Measurement Sensitivity:
Offers resolution down to 10 fA (0.01 pA), with a typical input bias current as low as 3 fA, enabling accurate capture of leakage currents in most semiconductor devices and insulating materials.
Wide Dynamic Range:
The current measurement range spans from 10 fA to 20 mA, covering over 12 orders of magnitude. It can measure rapidly changing current signals without range switching, avoiding errors associated with it.
Multi-Function Integration:
High-Resistance Measurement:?Utilizes the built-in voltage source (up to 200V) for direct high-resistance measurement, simplifying test system configuration.
Charge Measurement:?Features an integrator function for measuring minute charge, suitable for studying piezoelectric effects, photoelectric effects, etc.
Low-Noise Voltage Measurement:?Provides high input impedance and low-noise voltage measurement capabilities.
Excellent Input Protection and Low-Noise Design:
Employs a triaxial (Guard/Triax) interface to minimize measurement errors introduced by cable leakage and external environmental noise—a key design element for achieving fA-level measurements.
Key Application Scenarios
Semiconductor Device Characterization: Measuring transistor gate leakage, diode reverse saturation current, PN junction characteristics.
Insulation Performance Testing of New Materials: Evaluating volume and surface resistivity of thin films, ceramics, polymers, etc.
Photodetector Characterization: Measuring photodiode dark current, photoconductivity.
Capacitor Leakage Current Testing: Precision measurement of insulation resistance for high-quality capacitors.
Precision Instrument Accuracy Assurance
For high-precision instruments like the 6514, the gain accuracy of the measurement channels, the output accuracy of the voltage source, and the extremely low internal noise floor are fundamental to ensuring valid measurement results. Even slight performance drift can lead to measurement errors by orders of magnitude. Therefore, regular professional metrology calibration is essential.
The?Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department?provides users with critical support services for such precision measurement instruments:
Precision Metrology and Calibration:?Provides standard-based, traceable calibration services to ensure the accuracy of all 6514 measurement functions (current, voltage, resistance, charge) meets technical specifications.
Performance Testing and Diagnosis:?Tests key instrument parameters like noise level, zero drift, and input impedance to assess its overall performance status.
Maintenance and Repair:?Offers professional fault diagnosis and component-level repair for encountered failures or performance degradation, restoring the instrument to its original performance.
Measurement System Setup Consultation:?Provides technical consultation for high-resistance/low-current measurement needs, including instrument selection, connection solutions (e.g., use of triaxial cables), and grounding/shielding techniques.
Conclusion
The Keithley 6514 System Electrometer sets the industry standard in the low-level measurement domain through its exceptional sensitivity and functionality. Its value is fully realized in its unparalleled measurement precision.
Ensuring this precision is maintained long-term requires professional and rigorous technical support as a backbone. Partnering with a specialized service provider like the?Shenzhen Bao'an Shajing Fangfengrui Instrument Equipment Business Department means users can establish a reliable quality safeguard for their critical research and test data, ensuring the authenticity and scientific integrity of every measurement result.
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