Digital Picoammeter (DPM-111-C2)
• Measures current down to 1pA • All solid state and IC design, • Very low offset current • Built-in computer interface.
This is a very versatile 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 instrument uses a well designed precision FET input electrometer operational amplifier AD549, which offers the lowest input bias currents (5OfA with ±5V supplies) available in any standard operational amplifier. The excellent characteristics of AD549, 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 first operational amplifier AD549 is used in low level current to voltage configuration and the output has been directly read on a 3½ digit panel meter.
Technical data
- Model
- DPM-111-C2
- Manufacturer
- SVS Labs
- Multiplier
- X1, X10, X10², X10³, X104, X105
- Accuracy
- 0.2% for all ranges
- Power Supply
- 220V ±10%, 50Hz
- Input
- Through BNC connector
- Software
- DACC and CAMM, both Window
- Current from photo multiplier tubes, photometers etc.
- • Measures current down to 1pA • All solid state and IC design
- • Very low offset current • Built-in computer interface
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