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Introduction
The Handheld XRF gun makes contact elemental measurements on section halves and prepared powder mounts. The XRF emits a primary X-Ray beam that bombards the material and excites electrons. The movement of electrons emits secondary fluorescent radiation that is measured in the gun. These energy patterns are characteristic to elements and determine what is present.
The Handheld XRF can be run either independently or through an attached pc laptop. The Innov-x-Delta Advanced PC Software is available on both the gun and computer, and functions the exact same. However, layout and presentation of the software is different.
Point of Interest
The Handheld XRF can run independently. Meaning that measurements can be made using either the gun or the attached computer system. The two systems are independent, and do not communicate to each other when connected. Thus it is important to stay consistent in method choice. Either you use the gun or the computer system, without switching back and forth.
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Caution: if using the computer system method do not un-plug the gun, turn off or exit the program, or turn off the gun prior to exporting data. If you do so, there is a possibility you will lose data.
Getting Started
Turn on the pXRF by pressing the power button located on top of the machine (Figure 1). When the button turns green the pXRF is powered on.
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This takes you into the main software page.
Setting Parameters
You are now in the main measurement window. First set the Mode to measure in. The gun has a Geochemical and Soil Mode. Each mode has different scanning parameters which preferentially pick up some elements better than others. The gun will remember the chosen mode and does not have to be chosen each time a new measurement is taken or the Gun is turned off/on.
Choosing a Mode (Soil or Geochem)
- To access the Modes click on Mode at the top of the screen (Figure 5). This directs you to the 'Mode' Screen and in the left panel you can choose between the Geochemistry and Soil modes. Click on each to see the features of each Mode and select the one best for your analysis.
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- Now that the Mode is set, establish a measuring time for each beam.
Timing each beam
- Each Mode has preset measuring times but these are changeable. To access the Measurement Time click on the Setup Button at the top of the screen (Figure 6). Then in Left Panel click on Test Condition. This brings up a screen that shows the Minimum and Maximum time currently set for each beam. Adjust the settings to your liking and click Save.
- Note: In exp. 392 the "Test End" was set to LiveTime after having some issues with exporting spectrum files. For further notes please see pXRF user guide.
Figure 6. Test Condition Window. A. 'Setup' Button on the top right of the screen. B. 'Test Condition' Option in the Left Panel. C. Minimum and Maximum Time Settings for each beam. D. LiveTime is the preferred Test End time. E. 'Save Button
Note: If the minimum time is set to 1 and the maximum to 30, if the gun determines it has a good profile in less than 30 seconds it will stop actively measuring. If you want to ensure it measures for the full time, set the minimum and maximum time to the same number.
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Beam 2 Min 30s
Beam 2 Max 30s
Making a Measurement
When you turn on the gun for the first time you need to make a Cal Check before any other measurements are taken. Place the gun in its stand as shown in Figure 7.
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This measurement is taken when the gun is turned on and every 10 hours. When a Cal Check is needed the white bar will say 'Perform a Cal Check' and the 'Start' button will gray out and be disabled until the Cal Check is completed (Figure 8). When successfully completed the white bar will say 'Cal Check completed successfully'.
Naming a Measurement
In the Analysis Window, click 
button in the upper left corner (Figure 9, arrow B). The white bar shows the current run number (arrow A).
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Click 'Save' in the lower right portion of the screen. There is no confirmation that the information has been saved. If you do not click 'Save' the information will revert back to the prior run and there will be two measurements with the same name. The measurements are parsed by time so measurements will not overwrite one another there will just be multiple measurements with the same information.
Fill out LogSheet
Remember to manually fill out the LogSheet as you are naming your measurement. LogSheets can be downloaded here XRF Log Sheet Template.xlsx
pXRF Instrument Set up
Now that a Cal Check has been performed and the sample information is updated you can start measuring.
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Figure 12. Analysis window: Test completed. A. Current run number, B. To enter test information (see Figure 10), C. Test completed, D. Start Button to start next measurement
Exporting Files
The gun writes one file per day that contains all the measurements taken in that 24 hour period. Until that file is exported the measurements are not permanently attached to the file. If files have not been exported do not disconnect the gun, turn off the software, or turn off the gun otherwise those un-exported measurements will be lost.
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For example: 10 measurements are exported at 11:00 on 03-15-2017. Then 5 new measurements are taken and exported at 15:00 on 03-15-2017. The 03-15-2017 file now has 15 measurements that are exported in spite of 10 measurements being exported earlier in the day.
Credits
This document originated from Word document XRF_QSG_374 (see Archived Versions below for a pdf copy) that was written by N. Lawler and A. Armstrong. Credits for subsequent changes to this document are given in the page history.
Archived Versions
Olympus Delta pXRF Quick Start Guide - September 27, 2022
LMUG-pXRFQuickStartGuide-230220-2007-196.pdf
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