K-Patents PR-33-S Troubleshooting Guide User Manual
Page 8
TROUBLESHOOTING GUIDE
FOR PR-33-S AND PR-33-AC
8 (10)
January 9, 2015
K-PATENTS OY
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Postal Address: P.O.Box 77, FI-01511 Vantaa, Finland
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Street Address: Elannontie 5, FI-01510 Vantaa, Finland
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Tel. int.+358 207 291 570
Fax int.+358 207 291 577
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www.kpatents.com
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VAT No. FI03035575
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Business ID 0303557-5
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Registered in Helsinki
Solution: Troubleshoot the issue indicated by the error message.
2. Description: No optical image, low image quality
Cause(s): The CCD-element does not receive enough light to determine the borderline of reflected light vs
shadow on the optical image. Lack of light in 90 % of the cases is caused by coated or eroded prism. Liquid
leakage through the prism gasket fits this category. Remaining 10 % of the faults are related to the other
optical or electrical faults, such as broken optical fiber or detached flat cable. Severely bad optical images
are generally seen with these error messages.
Solution: Clean the prism with a glass fiberbrush and check the optical image. If that does not help, check
the prism for any scratches or marks. The prism needs to be replaced if there are any visible marks on the
polished surfaces. The leakage can be detected from abnormal temperature readings and increased head
humidity. Services can be done only by K-Patents or a trained service person.
3. Description: Spiking concentration outputs
Cause(s): Coating of the prism or prism erosion causes a bad optical image and unstable measurement.
Solution: Clean the prism. If the prism is eroded, service accordingly. If the coating is a constant problem,
consider other installation position or additional washing system.
4. Description: Cannot receive signals from the sensor or establish connection through Ethernet
Cause(s): Faulty processor card, typically originates from weak cable connections or component failure due
to excessive humidity or temperature inside the sensor. Another potential cause may be a liquid leakage
inside the sensor.
Solution: The cables should be inspected, and if the problem is not resolved, the 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 need to be replaced.
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