JEOL JSM-6390 LA, User Manual

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SEM manual ETHZ v1.4
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A9.4) Abnormal and known hardware-software bugs
WARNING: The following list abnormal behaviour that will hopefully be fixed one day…
A9.4.1) Wrong EDS energy calibration
Starting in April 2019, we have observed a few times a shift in the X-ray peak position.
This is due to the EDS hardware losing its calibration. This is NOT visible on low X-ray
energy lines (e.g., O K
a
or Si K
a
) and should be observable at higher energy (> 5 keV).
Check the position of the Fe K
a
X-ray line (or any other line > 5 keV) and ensure it
matches the theoretical position (Fe K
a
= 6.40 keV; Fe K
b
= 7.06 keV).
If you observe a significant shift in energy (> 0.1 keV, see
Fig. A9.3.1 ), call for assistance,
or perform the reset of the Thermo NSS box as described below:
1) Select the acquisition mode “Spectrum” in the left menu.
2) Open the tab “Detector Status” on the bottom right panel.
3) Click on “Advanced Status”. It launches the program “FrontEnd Status”.
4) Close the software “NSS”.
5) Click on the button “Reboot” in “FrontEnd Status”. The connection light turns red
(disconnected). Locate the white box behind the Thermo PC (behind the table); wait
5-10 seconds until the indicator light on the top of this box turns green.
6) In “FrontEnd Status” click on “Reconnect”. The connection light should turn green in
the software. If not, you have clicked too early (the hardware was not fully
restarted). Wait and try again. If you still cannot connect, ask for assistance.
7) Restart the Thermo NSS program.
8) Re-run an analysis and check the sum. Ask for assistance if you still observe a shift
in the energy of a high-energy X-ray line.