K-Patents PR-21-S - Manual (Page 123)

12 Sensor verification 117
Figure 12.3 Verification display
Important: Clean and dry the prism and the sample holder very carefully be-
tween the R.I. liquids. Use a suitable solvent, e.g., ethanol.
To check that the standard liquid is properly wetting the prism, it is possible to
press soft key
OPT. IMAGE . The optical image should show like in Figure 12.4. For
more information on the optical image, please see section 5.4.1.
Figure 12.4 Optical image
A verification data collection method is implemented in the DTR. The instrument
measures each verification data point ten times and uses the average of these mea-
surements. Measuring each verification liquid takes approximately ten seconds,
during which the measurement progress display (Figure 12.5) is shown. Please
wait until the verification step 2 display reappears before proceeding to next ver-
ification liquid.
Figure 12.5 Verification in process
Pressing COMPLETE in the verification display finishes the verification procedure and
calls up the verification results.