What is the purpose of the black paint on the LDO sensor caps?

Document ID

Document ID TE6480

Published Date

Published Date 13/03/2017
Question
What is the purpose of the black paint on the LDO sensor caps?
Summary
Purpose of the black paint on the LDO sensor caps
Answer
This black coating is to prevent stray light from influencing readings.  The caps should be replaced annually or when about 50% of this black coating is missing.  Using the probe in organics or performing aggressive cleaning will deteriorate this coating.