487 Dual-Channel Picoammeter Module

Channel 1 input

Current input to picoammeter

Channel 2 input

Current input to picoammeter

Auxiliary input

Voltage input to ADC

Gain Ranges

10¹⁰-10⁵ V/A

Maximum Current Input

100µA

Frequency Response

DC to 30Hz

Gain Accuracy

+1%

Gain Stability

200ppm/°C

Output Stability

5ppm/°C to 500ppm/°C depending on sensitivity

Linearity

< 0.025% departure from linearity from zero to full scale

ADC Resolution

4½ digit BCD (0 to 19999) i.e. > 14 bit resolution

ADC Integration Time

100ms

Auxiliary input range

0- 9.8V

Picoammeter Input Impedance

Virtual earth

Auxiliary input impedance

1 MΩ

Interface

USB via 417/417T Unit (I2C)

Control

Front panel/ USB

Front Panel Controlled Features

Input select, gain range select, auxiliary input select

Dimensions

Dual width module, 3U high

Connector

BNC

Display

Digital display of 417 unit, channel C