K-Patents PR-03 - Manual (Page 118)

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112 PR-03 instruction manual
1. Take the sensor from the process and place it on a table.
Note: Keep the PR-03-M with the flow cell and place it on a table with the flow cell (medium adaptor)
up. Use the flow cell as a sample holder.
2. Allow the sensor temperature to settle close to 25 ◦ C. The temperature does not have to be exactly 25 ◦ C,
since the differences in the calibration temperature are compensated by the software.
3. Ensure that the prism is clean without any traces of the process liquid. Use a cleaning solvent appropriate
for the process medium.
4. Use the certified standard R.I. liquids, which correspond to the values indicated in the Final test section
of the latest Delivery Data Sheet or Standard calibration sheet of your PR-03 sensor. The three R.I.
values are selected by K-Patents calibration software to represent the used R.I. range.
5. Check the R.I. calibration with the three R.I. liquids. The use of K-Patents PR-03 sample holder (see
Figure 5.15) or of the flow cell (medium adaptor) is recommended to ensure a right portion of liquid on
the prism.
6. The R.I. calibration can be checked against the standard R.I. liquid values as follows:
Display Key-in sequence Value to be checked Acceptable value
from Normal display
Information display D Standard RI (25 ◦ C) Sample R.I. ± 0.0006
Corrective action if the verification fails
If the verification does not meet the acceptance criteria defined above, the following steps can be taken to
correct the calibration of PR-03.
1. Ensure that the prism is in good condition
See Section 6 for more details of prism mounting and dismounting.
2. The following values and diagnostics should be checked from the Indicating transmitter displays with
the standard R.I. liquid on the prism.
Display Key-in sequence Value to be checked Acceptable value
from Normal Display
Raw sensor data C-A LED below 200
Image diagnostics C-A-A-A-A Max intensity OK Yes
Endpoint below 75% Yes
Image below corner Yes
Slope OK Yes
Left curve OK Yes
Right curve OK Yes