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VC型静电仪是一种交流感应式静电仪表。它由电抗变换器、交流放大器、振荡器、功率放大器、同步电压放大器及电源所组成。由于有自动讯号输出,因而还可配上自动记录器和警报器。该仪器可用来在实验室和现场测量带电物体的静电位、电容,计算电荷和能量,从而判断静电位是否会构成危险。该仪器的静电测量是基于振动电容式原理;电容测量采用充电法直读式方案。其主要性能和规格如下:电位测量范围O～±50千伏;电容测量范围0～0.01微法;电位测量精度<±3％;电容测量精度<±6％;而且,零点漂移误差也较小;交直流二用(交流电源220伏±10％、50赫;直流电源12伏)。主体外形尺寸28.5×19×12.5厘米。重量4公斤。本文详细地介绍了该仪器的设计思想和保证测量精度的技术措施。
VC-type electrostatic instrument is an AC induction electrostatic meter. It consists of reactance converter, AC amplifier, oscillator, power amplifier, synchronous voltage amplifier and power supply. With automatic signal output, it can also be equipped with automatic recorder and alarm. The instrument can be used to measure the electrostatic potential and capacitance of charged objects in the laboratory and in the field, and calculate the charge and energy to determine whether the electrostatic potential poses a danger. The instrument’s electrostatic measurement is based on the principle of vibration capacitance; capacitance measurement using direct-reading charging program. The main performance and specifications are as follows: Potential measurement range O ~ ± 50 kV; capacitance measurement range 0 ~ 0.01 microfarads; potential measurement accuracy of ± 3%; capacitance measurement accuracy of ± 6%; and zero drift error is also small ; AC and DC two-use (AC 220 V ± 10%, 50 Hz; DC 12 V). The main dimensions of 28.5 × 19 × 12.5 cm. Weight 4 kg. This article describes in detail the design of the instrument and technical measures to ensure measurement accuracy.