This is a very multipurpose equipment for the measurement of low dc currents. It has 6 decade ranges with 100% over-ranging from 10-9A to 10-4A. For the ease, readings are directly obtained on a 3½ digit DPM. The excellent characteristics of ultra low bias current, low offset voltage, low drift and low noise have been fully utilized to obtain best results in the present picoammeter. The instrument uses a well designed precision FET input electrometer operational amplifier which offers the lowest input bias currents available in any standard operational amplifier. The instrument is capable of accepting either polarity of the input current. Well regulated power supplies are incorporated to use the instrument upto 10% changes in a.c. main’s voltage.

Specifications:-

• Multiplier: X1, X10, X102, X103, X104, X105.

• Accuracy: 0.2% for all ranges.

• Resolution: 1pA, 10pA, 100pA, 1nA, 10nA, 100nA.

• Input Resistance: 2.5KW, 0.25KW, 25W, 2.5W, 0.25W, 0.025W.

• Display: 3½ digit 7 segment LED (12.5mm height) with auto polarity.

• Input: Through amphenol connector.

• Power Supply: 220V ±10%, 50Hz.

• Weight: 2.5Kg.

• Dimensions: 240mm X 275mm X 120mm.