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Step Voltage Generator: Outputs a step voltage of (1200±50) V
Decay Time: Adjustable range of 0–180 seconds, with an error of ±0.01 seconds
Signal Acquisition Sensor: A metal disc with φ(30±1) mm, surrounded by a grounded protection ring; the probe is connected to an amplifier. The distance between the sensor surface and the top of the support ring is (50±1) mm
Electrode: A stainless steel disc with a diameter of φ(70±1) mm, fixed on an insulating bracket
Support Ring: A metal ring with an inner diameter of φ(100±1) mm; the distance between the top of the support ring and the electrode surface is (4.0±1) mm, coaxial with the electrode
Specimen Clamping Ring: Composed of an inner ring and an outer ring, with the specimen placed between them. The outer diameter of the inner ring is (250±1) mm, and the inner diameter is (220±1) mm, grounded and coaxial with the electrode and support ring. The outer ring is made of elastic (bendable) material for easy specimen clamping
Decay Ratio: Adjustable range of 0.1%–100%
Specimen Size: 300 mm × 300 mm
Power Supply: AC 220V; 50Hz
Voltage Application Device: Capable of generating a step voltage of (1200±50) V within 30 μs.
Signal Acquisition Sensor: Addresses zero drift and external interference in electrostatic potential, optimizes signal processing, and improves detection accuracy.
Computer Control: Real-time display of voltage-time curves, voltage half-life, and shielding coefficient of the specimen; data storage, historical data query, and curve printing functions.
