Universal Measuring Device (UMD)

The UMD is a universal measuring device for use in Flying Probe Testers for PCBs.

The functional targets are comparable to those of the measuring electronics used in the earlier MANIA Ultim8 testers; however the UMD is completely new developed to achieve highest performance.

The UMD is perfectly driven and controlled by the FourStars-ES ProbeStar Software.

The main functions of the UMD are:

• Capacitance measurement
• Resistance measurement, supporting
  • Regular 2 wire continuity measurements.
  • Four wire Kelvin low resistance measurements.
  • Four wire Kelvin component measurements.

The UMD consists of 2 electronic parts:

• An analog electronic module
• A digital electronic module

The analog module contains:

• Power connector for single 24V DC supply
• Local voltage regulators
• References
• Analog components (converters, amplifiers, etc. )
• Interface to the measuring probes (Hirose PO6 coax connectors)
  max. cable length to contacting probes: 8 m each

The digital module contains:

• Interface to the controlling PC
• High speed (Xilinx) FPGA for real time data processing of measurement data
• Integrated soft cores for smart data handling and process control
• Diagnosis display

Mechanical Solution:

• Sandwich solution for easy integration into different tester types
• Assembled and tested at FourStarsES

Specification:

• Capacitance measurements:
  • Resolution: 1 fF   (femto Farad)
  • Max. C: 100nF   (nano Farad)
  • Auto ranging   (5 discrete ranges)
• 4WK low Resistance:
  • Resolution: 1 µΏ   (micro Ohm)
  • Repeatability: 5 µΏ   (laboratory environment, 5 m cables)
  • Max. R: 35.4 Ώ
  • Auto ranging   (10 discrete ranges)
• 2 wire regular resistance and 4WK component measurement
  • Resolution: 1 mΏ   (milli Ohm)
  • Max. R: 1 MΏ   (MegOhm)
  • Auto ranging (12 discrete ranges)