Ashcroft S5500 Instrukcja instalacji i konserwacji - Strona 5
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Drukuj stronę5.2 Description of function
The temperature is transferred via thermal conduction to a compressed inert gas inside the sensor. The properties of
gases mean that any temperature change brings about a change in pressure, and this is transferred via a capillary
tube (in the fixed stem or executed as a flexible capillary line) to the Bourdon tube on the gauge. This produces a
deflection of the Bourdon tube that is proportional to the change in pressure. A rotary movement is produced via a
connecting rod and a movement, which is transferred to the indicator arm using an arbor. The angle of rotation for the
complete range is approx. 270°.
5.3 Description of components
5.3.1 Bulb
The temperature sensor has a diameter of 6-10 mm and a length of 55-1000 mm, and contains the inert gas under
pressure. Its active length is 55-190 mm, depending on the diameter. The temperature sensor must not be subjected
to pressure without a supplementary thermowell.
5.3.2 Capillary line
The capillary tube is located in a protected position within the stem, or is executed as a flexible part with or without
additional flexible armor or a plastic sheathing.
5.3.3 Case
The window uses multi-layer safety glass. This device is fitted with a rear plug capable of being blown out.
5.3.4 Dial with pointer
The gauge is equipped with a dial and pointer pursuant to EN 13190.
Erläuter ung, z usätzlich ei n Hi nweis :
5.3.5 Instrument connection
The instrument connection is located on the underside of the gauge and can be executed as a threaded or flanged
connector. Union instrument connections permit the case to be oriented according to the point of installation.
5.4 Accessories
Please contact the manufacturer regarding special tools and accessories.
6 Transport
6.1 Safety
The thermometer should be protected against the effects of knocks and impacts. The device should only be
transported in the packaging provided, to protect against glass breakage. The device should only be transported in a
clean condition (free from residues of measuring media).
6.2 Transport inspection
The delivery is to be checked for completeness and damage during transport. In the event of damage during transport,
the delivery is not to be accepted, or only accepted subject to reservation of the scope of the damage being recorded
and, if necessary, a complaint initiated.
6.3 Storage
The gauge is to be stored in dry, clean conditions, within a temperature range of -20 to +60 °C, protected against
direct exposure to sunlight and protected against impact damage.
7 Mounting/Installation
7.1 Safety
Thermowells must be used for all processes and flowing media subjected to pressure. They protect the thermometer
stem against corrosion and mechanical damage, and permit the thermometer to be removed without leaks.
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