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5 Construction and function
5.1 Overview
1 Coupling
rod
2 Separating
diaphragm
3 Measuring
diaphragm
4 Movement
5 Torsion
tube
6 Transfer
lever
7
Pressure transfer liquid
5.2 Description
of
function
The pressures to be compared act hydraulically via the separating diaphragm on the measuring diaphragm. When the
pressure is equal, the measuring diaphragm is in the rest position. In the event of a pressure difference, a force is
generated on the measuring diaphragm which causes it to be deflected in the direction of the lower pressure. Using a
torsion tube, the movement along the measurement path is conveyed out of the closed measurement system as a
rotary movement, and translated via the attached movement into an angle of turn of between 0 and 270°.
If a unilateral stress on the measurement system occurs which exceeds the measurement range, the separating
diaphragms are supported on similarly-contoured molded parts of the system housing, thereby protecting the
measurement system against overload.
5.3 Description
of
components
5.3.1 Scale
with
pointer
The pressure gauge is equipped with a dial and pointer similar to EN 837, nominal size 100 mm.
Erläuterung, zusätzlich ein Hinweis:
5.3.2 Instrument
connection
The instrument connection is located on the underside of the pressure gauge and can be a threaded or flanged
connector pursuant to DIN EN 61518.
5.4 Accessories
Please contact the manufacturer regarding special tools and accessories.
6 Transport
6.1 Safety
The pressure gauge 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 must be checked for completeness and damage during transport. In the event of damage during
transport, the delivery must not 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 pressure gauge must be stored in dry, clean conditions, within a temperature range of -40 to +60 °C, protected
against direct exposure to sunlight and protected against impact damage.
