Leaders in Synchrotron beamline systems and components

I200 2-channel digital electrometer

I200 2-channel digital electrometer

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Features

  • Two independent gated integrator channels
  • Dynamic range 0.1pA to 100 μA
  • Integrated digitisation and communications
  • Integrated calibration test source
  • Selection of current and charge integration modes
  • External trigger capability
  • Optional high-precision analog output for servo control applications
  • Auxiliary I/O port

Applications

  • Ionization chambers
  • Two electrode beam position monitors
  • Photodiodes
  • Ultra-low current and charge measurement
  • With servo control option:
  • Stabilisation of double crystal monochromators for synchrotron beamline experiments by control of the crystal cage piezo motor amplifier
  • Stabilisation of beam position in charged particle or photon beamlines

Options

  • Auxiliary HV output 0 to 1000 V
  • Alternative feedback capacitor options
  • Servo control options

Specifications

Parameter Value
Operating principle Gated integrator (charge integrating amplifier)
Integration capacitor Dual, selectable
Input noise < 10 fA rms + 1 fA rms per pF input load up to 100 pF (1 second integration, 10 pF capacitor, 0 V bias)
Input offset current < 100 fA at 0 V bias, 25 C
< 600 fA at 0 V bias, 50 C
< 200 fA at 400 V bias, 25 C
Stability Output drift < 5 ppm / C / hour
Integration time User selectable, 100 μsec minimum
Integration modes 0: continuous current; 1: continuous charge, 2: lossless charge; 3: external gate integration; 4: externally-triggered burst mode
External gate 0/+5 V, 50 ohm or fibre-optic receiver, software-selectable
Digitisation 16 bit bipolar, 250 kHz
Auxiliary HV PSU (Factory option) 0 to 1000 V programmable (polarity and maximum voltage factory selectable), 1mA max. Noise and ripple < 0.1%
Power input +24 V (+/- 2 V) DC, 350 mA typ, 500 mA max
Controls Two rotary switches for loop address and comms mode/baud rate
Displays Status LEDs (power, device status, comms mode, data transmission rcv/xmit). “HV on” LED
Case material Stainless steel sheet
Weight 1.64 kg (3.6 lb)
Operating environment 10 to 35 C (15 to 25 C recommended to reduce drift and offset) , < 70% humidity, non-condensing, vibration < 0.1g all axes (1 to 1000 Hz)
Shiping and storage environment -10 to 50 C, < 80% humidity, non-condensing, vibration < 2g all axes, 1 to 1000 Hz