5.5 Measurement XRF equipment operation is instrumentspecific and shall be in accordance with the instrumentmanufacturer’s instructions. Always ensure that the correctmeasurement file is selected for the application to be measured. Typically, instruments will slide the measuring stage outof the instrument when the measurement chamber is opened.The test sample is then positioned on the programmable X-Ystage such that the laser pointer points at the measurementlocation. When the measurement chamber is closed, thestage will automatically retract into the chamber.