X-ray Source Emission Controller XR40B-EC

The XR40B-EC electronic unit controls the X-ray source emission current.



Prevac are a world leader in the design and production of analytical and deposit scientific and research equipment. Their systems operate in a high and ultra high vacuum environment. They design and construct UHV and HV systems fully adapted to the individual requirements of research projects and industrial applications.


It fully controls the high voltage X-ray source power supply XRHV01-PS via analogue interface 0 – 5V, so the user can see the high voltage and emission current on the XR40B-EC display. The XR40B-EC displayed emission current is the exact emission current (corrected by the water leakage current of the cooling system). This combination allows very convenient and stable control of the X-ray source. The XR40B-EC controller has several interlocks: master interlock, two X-ray tube cover interlocks, high vacuum interlock, cooling water interlock and remote interlock to fully protect both the user and X-ray source. If any interlock condition is not meet the source is disabled. Two operating modes, Standby and Operate, guarantee the most accurate and stable emission immediately after starting an experiment. Easy firmware update via USB port. Unit can be remotely controlled via RS232/485 or Ethernet interfaces. Autosave function (XR40B-EC unit) for saving your parameters/unit preset and applying them automatically after restart.

Capability to operate up to two X-ray sources.

If any interlock condition is not met, the source cannot be powered on. In addition to these three interlocked safety mechanisms, water leakage current is continuously monitored.

Technical data

Supply voltage 100 – 240 VAC, 50/60 Hz
(power consumption max 1600W)
Emission current range (Ie) 0 – 50 mA, accuracy 0.1 mA
Anode high voltage range (UHV) 0.5 kV – 15 kV, accuracy 0.1 kV
Cathode current (Icath) Output 1: 2.5 A
Output 2: up to 6 A in operate mode
Anode power limit 750 W
Emission curent ramp 0.1 – 50 mA/sec
High voltage ramp 1 – 1000 V/sec
Interlocks Master, 2 X-ray cover, high vacuum, cooling water, remote
Communication interface RS232/485, Ethernet
Communication protocol MODBUS-TCP
User interface XR40B-EC 7″ TFT display with touchscreen, digital encoder
Interface languages English, German, Polish
Dimensions XR40B-EC 483 x 133 x 380 mm (W x H x D), 19″ rack mountable
Weight (approx.) XR40B-EC 7 kg



Instruments with Electronics Brochure

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  • X-ray monochromator quartz crystal heating
  • Software control (Version Pro, Extended or Library Module)

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