HBM P6A Manual de usuario
Absolute pressure transducer
P6A
Mounting instructions
Electrical
measurement
of mechanical
quantities
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3
P6A
Contents Page
Safety instructions 4..............................................
1 List of components supplied 7.................................
2 Application 7.................................................
2.1 Use in areas where there is a risk of explosion 8...............
3 Construction and operating mode 8............................
4 Assembly 8...................................................
5 Electrical connection 11........................................
5.1 Cable extension 12..........................................
6 Differential pressure measurement circuit 13.....................
7 Measurement 14...............................................
7.1 Measuring dynamic pressures 14.............................
8 Technical Data (in accordance with DIN 16 086) 15................
9 Dimensions (in mm) 16.........................................
10 Options 18....................................................
11 Certificate of Conformance 19..................................
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4P6A
Safety instructions
Use in accordance with the regulations
The P6A pressure transducer is to be used exclusively for pressure
measurement and directly related control tasks. Any other use is deemed to
be not as prescribed.
To ensure safe operation, the transducer must only be used in accordance
with the specifications in the User Manual. It is also essential to comply with
the statutory and safety regulations relevant to the particular application. This
also applies to the use of accessories.
The pressure transducer is not a safety device as defined in the regulations
for use. The perfectly safe operation of this pressure transducer requires
suitable transport as well as technically correct storage, installation and
assembly coupled with careful operation.
General dangers in non-observance of the safety instructions
The pressure transducer corresponds to the state of the art and is safe to
operate. The pressure transducer can give rise to residual danger if
improperly installed and operated by untrained personnel.
All personnel involved in the installation, commissioning, maintenance or
repair of the pressure transducer must have read and understood the User
Manual and in particular the technical safety instructions.
Accident prevention
Care must be taken to ensure that when the pressure transducer is being
installed or removed, there is no pressure in the circuit.
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5
P6A
Residual dangers
The scope of the capabilities and components provided with the transducer
covers only a part of pressure measurement technology. Equipment planners,
installers and operators must plan, carry out and accept responsibility for the
safety engineering aspects of pressure measurement technology in such a
way that residual dangers are kept to a minimum. All existing regulations must
be complied with. There must be reference to the residual dangers connected
with pressure measurement technology.
Where residual dangers arise when working with the P6A, these are
highlighted in this Manual with the following symbols:
Symbol:
DANGER
Meaning:
Maximum danger level
Signifies a directly dangerous situation which, if the safety requirements are
not observed, will result in death or serious physical injury.
Symbol:
WARNING
Meaning:
Possibly dangerous situation
Signifies a possible dangerous situation which, if the safety requirements are
not observed, could result in death or serious physical injury.
Symbol:
CAUTION
Meaning:
Dangerous situation
Signifies a possible dangerous situation which, if the safety requirements are
not observed, could result in damage to property or mild to moderate physical
injury.
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6P6A
Symbol:
Note
Signifies that important information is being given about the product or the use
of the product.
Symbol:
Meaning:
CE mark
The CE mark enables the manufacturer to guarantee that the product
complies with the requirements of the relevant EC guidelines (see Certificate
of Conformance at the end of this User Manual).
Safety-conscious working
Fault-messages must only be acknowledged if the cause of the fault has been
eliminated and no further danger exists.
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7
P6A
Conversions and modifications
The pressure transducer must not be modified from the design or
safety-engineering point of view without our express agreement. Any
modification precludes liability on our part for any damage resulting therefrom.
Qualified personnel
The pressure transducer must only be installed and operated by qualified
personnel strictly in accordance with the technical data relating to the safety
requirements and safety rules and regulations below. ‘ It is also essential to
comply with the statutory and safety regulations relevant to the particular
application. This also applies to the use of accessories.
”Qualified personnel” means persons familiar with the installation, assembly,
commissioning and operation of the product who possess the qualifications
appropriate to their function.
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8P6A
1 List of components supplied
P6A Absolute Pressure Transducer, User Manual
P6A 10 to 500bar: 1 USIT1) gasket U 12.7 x 20 x 1.5
Also available:
-- Cable socket HK6S
(for variants with HS6P connector2)) Order no. 3-3312.0095
-- Unterminated connector cable
(for variants with HS6P connector2)) Order no. 1-KAB405.30A-3
-- Connecting plug MS3106A16S-1P Order no. 1-MS3106P7
-- 15-pin D-connector Order no. 3-3312.0182
-- Adapter for process port
M20 , to 500bar Order no. 1-P3M/500/M20
G1/2, to 500bar Order no. 1-P3M/500/R1/2
1) The USIT-gasket as delivered is a standard version supplied by C. Freudenberg, 69469 Weinheim. It
consists of mineral oil-based synthetic rubber and corrosion-resistant steel, and can be used from --30 to
+100C.
2) Corresponds to PT06E-10-6S, supplied by Bendix or UPT06J-10-6S, supplied by Canon
2 Application
Absolute pressure transducers are suitable for measuring static and dynamic
pressures in fluids and gases. They are available for various measuring
ranges in steps from 1 to 500bar and with various electrical connection
options, see Chapter 10 ”Options”.
The transducer housings are made from stainless steel, and seal the
measuring system hermetically against all harmful influences, so that even
continuous harsh operating conditions do not adversely affect the reliability
and precision of the transducers.
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9
P6A
Parts in contact with the medium are made of 1.4301 and 1.4542 stainless
steel. Any fluid or gas (vapour) that does not attack these steels is a suitable
measurement medium. The pressure transducer is attached by means of its
threaded connector for the pressure connector and can be installed in any
position. In particular cases there are specific instructions in Chap. 4
”Assembly” which must be followed!
3 Construction and operating mode
The internal measurement tube bears the strain gauges that are connected to
a Wheatstone bridge. The SG application is located in a hermetically sealed
reference chamber. This protects it from ambient effects and the pressure
measurement is not affected by the ambient pressure (absolute pressure
transducer).
The measuring membrane is strained by the pressure applied. As a result,
with thin-film strain gauges the ohmic resistance changes proportionally to the
pressure and the Wheatstone bridge is detuned.
4 Installation
Caution: Pulling on the housing or the cable entry will result in
mechanical damage to the transducer.
Pressure transducers can be screwed into place in any location. If a
transducer is used for measuring dynamic pressure trends in fluids,itmust
be installed with the pressure connector upwards so that an air-bulge cannot
form in the measurement tube.
When tightening, the wrench (size 27) must only be applied
to the clamping area of the mounting flange, and not to the
housing or cable entry.The permitted tightening torque is
30Nm.
WARNING
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10 P6A
For a perfect seal the bearing surfaces must be substantially flat and free from
tooling marks. The pin hole must have no spot-facing and should be only
lightly deburred, since the pressure of the measurement medium forces the
packing lips against the transducer and the bearing surface.
Caution: Before the P6A pressure transducer is installed or
removed, care must be taken to ensure that there is no
pressure in the circuit.
AF 27
USITRing
sharp-edged
Fig. 4.1: Installation of the pressure transducer
DANGER
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