The test series was nearly completed when it became apparent that the special alloys at the power feedthroughs into the plasma chamber resulted in thermoelectric voltages at the contact points, which reached nearly the level of the strain gage signal voltages themselves. The objective was then to compensate these thermoelectric voltages to ensure pure stress measurement. The measuring cycle already established was supplemented to include additional measurement of the thermoelectric voltage during the strain gage measuring pauses when the excitation voltage was switched off.
3. A107IPP Measuring Module
Modified A107IPP Q.bloxx modules are used at approx. 1,000 other Pt 100 measuring points.
The space required is also an important factor for a number of the 2,000 measuring points. With a width of 25 mm, the A101IPP Q.bloxx top hat rail module offers two and the A107IPP Q.bloxx module four measuring channels.
The modules are connected in groups to a number of Q.gate test controllers over a high speed serial RS485 interface. Here all data is logged synchronously, provided with a time signal and sent on to a server over a common instrument network.
The measuring systems are presently being installed; this trend-setting fusion reactor is scheduled to be put into test operation in 2014.
Use of nuclear fusion as a new, environmentally friendly source of energy could prove to be a turning point in the discussion regarding increasing energy requirements in emerging economies, the finite nature of fossil fuels as energy sources and the problems involved with CO2 emissions.