KROHNE OPTITEMP TRA-TCA Plus EN - Manual (Page 28)

3
INSTALLATION
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OPTITEMP TRA/TCA PLUS
www.krohne.com 01/2012 - 4000630301 - MA OPTITEMP TRA/TCA Plus R01
To avoid measurement errors, ensure that the insertion length ("b" in the drawing below) meets
the following requirements:
• Insertion length = 10...15 x thermowell diameter, but at least 100 mm / 3.94" (shorter
insertion lengths are possible but they impair measuring accuracy).
• Tubes with Ø < 300 mm / 11.8": thermowell tip should project past the middle of the pipe is
possible, if the flow velocity of the product allows it.
3.4.2 Other installation requirements
• A well-insulated pipeline or tank around the measuring point reduces the heat transfer and
the distorting influence of the ambient temperature.
• To avoid measurement errors caused by poor heat transfer, the measuring insert must
always be in contact with the bottom of the thermowell (this is normally guaranteed by the
spring-loaded version of the measuring insert).
• Choosing the right gasket for the process connection depends on the process conditions; the
manufacturer can thus only give the general recommendation that the gasket must comply
with the individual requirements of the measuring point (e.g. pressure, temperature,
chemically aggressive media).
Figure 3-2: Permitted insertion length
INFORMATION!
For more information on the maximum insertion length, please refer to the subsection "Typical
load types".
DANGER!
When a seal is damaged or incorrect, the medium may leak out, causing material damage or
bodily harm! It is the sole responsibility of the operator to select the right seal.
.backup.book Page 28 Tuesday, January 10, 2012 11:57 AM