487 Dual-Channel Picoammeter Module

  • 487 modular dual-channel picoammeter unit

Offering short-circuit detector operation and an impressive six decades of gain, wide dynamic range measurements with excellent linearity can be realised.

Including an auxiliary voltage input, the 487 can be operated from the front panel or fully automated over the USB interface. Over-load and under-load flags are included to enhance optimal remote operation.

Core benefits


  • Double width module housed within the 417/417T unit
  • Dual input, six decade picoammeter
  • Virtual ground (virtual null) input
  • Auxiliary voltage input
  • Front panel control
  • Fully programmable via USB 2.0 interface


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 & Mechanical

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

Ordering Information

S400_487 487 picoammeter module

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