Vaisala K-PATENTS PR-43, User Manual

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Figure 13 Diagnostics page
4.2.1 Diagnostic values
The diagnostic values provide additional information about the measurement.
• CALC is the calculated concentration value without the field calibration adjustment.
• QF or Quality Factor is a value in the range 0 ‑ 200. The QF value depends on process
medium optical properties. A typical good value is 100, but there are process media
where 50 is acceptable. The QF value should stay constant during the process. Falling QF
value may indicate prism coating.
• CCD gives the position of the shadow edge on CCD in %.
• LED is a measure of the amount of light from the light source in %. The value should be
below 100 %.
• BGlight indicates the amount of outside light reaching the CCD. A value above 120
triggers a warning. A value above 240 triggers OUTSIDE LIGHT ERROR .
• Traw is the uncompensated process temperature.
4.3 Parameters
All the refractometer’s functional parameters can be changed using the Parameters page. The
link to the Parameters page is located in the menu displayed on the right- hand side of the
computer display.
PR-43 Series User Guide M212455EN-B
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