K-Patents PR-23 - Manual (Page 188)

180 PR-23 instruction manual
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 13.5) is shown. Please
wait until the verification step 2 display reappears before proceeding to next ver-
ification liquid.
Figure 13.5 Verification in process
The sample holder keeps the sample on the prism surface and also blocks the
ambient light from reaching the prism. The K-Patents universal sample holder
PR-1012 (Figure 13.1) can be used with any K-Patents sensor.
Pressing
COMPLETE in the verification display finishes the verification procedure and
calls up the verification results.
If verification is successful, i.e. all measurements are within ±0.0004 of the nomi-
nal values, you get the message
VERIFICATION OK , see Figure 13.6 below.
Figure 13.6 Verification completed successfully (here only with one RI liquid)
Note: The sensor verification concerns only the refractive index n
D
measurement.
The calculation of concentration from n
D
and process temperature TEMP is not in-
cluded, see Section 6.6, “Calibrating the concentration measurement”.
If the verification fails, please see section 13.4 for corrective action.