Leakage currents are generated by stray resistance paths between the measurement circuit and nearby voltage sources. These currents can degrade the accuracy of low current measurements considerably. To reduce leakage currents, use good quality insulators, reduce the level of humidity in the test environment, and use guarding. Guarding will also reduce the effect of shunt capacitance in the measurement circuit.
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To reduce leakage currents, use good quality insulators, reduce the level of humidity in the test environment, and use guarding.
为了降低泄漏电流，应当使用高质量的绝缘材料，降低测试环境中的湿度，以及采用保护技术。
You must carefully choose insulation and apply guarding potentials, and you must use an amplifier with picoampere input-bias currents.
必须谨慎选择绝缘方法和使用保护电位，必须使用输入偏置电流为微微安级的放大器。
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