Endress+Hauser dosimass, Руководство по эксплуатации

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Installation Dosimass
10 Hauser
Fluid temperature
"
Caution!
Hot surface temperatures can arise at the housing of the device if fluid temperatures are > 70 °C
(158 °F).
In order to ensure that the maximum permissible ambient temperature for the transmitter

(–20 to +60 °C (–4 to +140 °F)) is not exceeded, we recommend the following orientations:
High fluid temperature
Vertical line: installation

å
4/view 1
Horizontal line: installation

å
4/view 3
Low fluid temperature
Vertical line: installation

å
4/view 1
Horizontal line: installation

å
4/view 2
3.2.4 Heating, heating insulation
Some fluids require suitable measures to avoid loss of heat or heat supply at the sensor.
A wide range of materials can be used to provide the required thermal insulation. Heating can be
electric, e.g. with electric band heaters or by means of hot water or steam pipes made of copper.
"
Caution!
Risk of electronics overheating!
• Consequently, make sure that the adapter between sensor and transmitter always remains free of
insulating material. Note that a certain orientation might be required, depending on the fluid
temperature
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ä
9.
• When using electrical heat tracing whose heat is regulated using phase control or by pulse packs,
it cannot be ruled out that the measured values are influenced by magnetic fields which may
occur, (i.e. at values greater than those permitted by the EC standard (Sinus 30 A/m)). In such
cases, the sensor must be magnetically shielded.
The secondary containment can be shielded with tin plates or electric sheets without privileged
direction (e.g. V330-35A) with the following properties:
– Relative magnetic permeability
μ
r

300
– Plate thickness d

0.35 mm (0.014")
• Information on permissible temperature ranges
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ä
36
3.2.5 Inlet and outlet run
There are no installation requirements regarding inlet and outlet runs. If possible, install the sensor
before fittings such as valves, T-pieces, elbows, etc.
3.2.6 Vibrations
The high oscillation frequency of the measuring tubes ensures that the correct operation of the
measuring system is not influenced by plant vibrations. Consequently, the sensors require no special
measures for attachment.
3.2.7 Limiting flow
See the information on
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ä
33 and

ä
36.