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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 inputCurrent input to picoammeter
Channel 2 inputCurrent input to picoammeter
Auxiliary inputVoltage input to ADC
Gain Ranges1010-105 V/A
Maximum Current Input100µA
Frequency ResponseDC to 30Hz
Gain Accuracy+1%
Gain Stability200ppm/°C
Output Stability5ppm/°C to 500ppm/°C depending on sensitivity
Linearity< 0.025% departure from linearity from zero to full scale
ADC Resolution4½ digit BCD (0 to 19999) i.e. > 14 bit resolution
ADC Integration Time100ms
Auxiliary input range0- 9.8V
Picoammeter Input ImpedanceVirtual earth
Auxiliary input impedance1 MΩ

Interface & Mechanical

InterfaceUSB via 417/417T Unit (I2C)
ControlFront panel/ USB
Front Panel Controlled FeaturesInput select, gain range select, auxiliary input select
DimensionsDual width module, 3U high
Connector BNC
DisplayDigital display of 417 unit, channel C

Ordering Information

S400_487487 picoammeter module

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