3. Lock the isolation valve handle with the safety pin (1).
a. Remove the special 5x10 guide plate screw (2) using a 5 mm Allen key.
b. Remove the nozzle from the isolation valve completely (3).
11.7 Thermal cover for SDI2‑23
Thermal cover PR‑7064 prevents heat flow between process and ambient surroundings. It
helps maintain the sensor tip and the prism surface at process temperature and may reduce
prism coating. Use thermal cover when the temperature dierence between the process and
the ambient is more than 30 °C or when the process temperature is over 60 °C.
Chapter 11 – Safe-Drive
211
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