K-Patents PR-23 Troubleshooting Guide - Manual (Page 12)

TROUBLESHOOTING GUIDE
FOR PR-23 ALL MODELS 12 (14)
January 9, 2015
K-PATENTS OY

Postal Address: P.O.Box 77, FI-01511 Vantaa, Finland

Street Address: Elannontie 5, FI-01510 Vantaa, Finland

Tel. int.+358 207 291 570
Fax int.+358 207 291 577  [email protected]  www.kpatents.com  Vat No. FI03035575  Business ID 0303557-5  Registered in Helsinki
the sensor.
Solution: The cables should be inspected, and if the problem is not resolved, the sensor processor card
needs to be replaced by K-Patents or a trained service person. If the sensor has leaked liquid, most likely all
the electronics and optics needs to be replaced.
4.5 Description: Inaccurate measurement
Cause(s): These issues are generally related to prism coating, which may result in a constantly increasing
concentration reading. It is also common that the fault is found in the reference measurement method (lab
instrument).
Solution: Clean the prism of the sensor carefully and check the optical image. Proceed with the built-in
verification procedure. If the verification fails, the instrument needs to be inspected by qualified person
before recalibration. If the instrument passes, it is an indication that the issue is related to the process
conditions (too low flow velocity) or ineffective washing.
Figure 11 Verification procedure for checking the calibration