Calibration
Figure 26: Menu - “Analyzer Settings”
7.1 Complete Calibration Procedure
A complete calibration procedure consists of (see Figure 27: Analyzer Cailbration Pro-
cedure page 59):
1. Check/set offset and gain with voltmeter, i.e. the calibration of the modules via
high precision voltmeter and high voltage probe (section on page )
2. “MCD Calibration” , i.e. the estimation of the energy shifts of the single chan-
nels for selectable slit/lens combinations (see section 7.3 on page 60), which in-
cludes the calibration of the peak position independent of pass energy (see sec-
tion 8.1 on page 65)
If the achieved values differ substantially from the existing default values or a
strong dependence on pass energy is observed for the spectra, this can point out
an analyzer malfunction which can not be corrected by the calibration procedure.
Please contact SPECS and send some spectra to assist in diagnosis.
3. the estimation of the analyzer workfunction (see section 7.4 on page 61) and
fine tuning of the offset for all modules (except 40V) via Fermi edge measure-
ments (Figure 29: Fermi Edge Operation page 62) and optionally
58 PHOIBOS
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