Baumer Flex Bar 3431 User Manual

FlexBar 3431 Pressure Transmitter

Safety instructions

This instrument is built and tested ac cord ing to the current EU-direc­tives and packed in technically safe con di tion. In order to main tain this
condition and to ensure safe op er a tion, the user must follow the hints
and warnings given in this instruction.

During the installation the valid national rules have to be observed.
Ignoring the warnings may lead to severe per son al injury or substantial
damage to property.

The product must be op er at ed by trained staff. Correct and safe
operation of this equipment is de pend ent on proper transport, storage,
installation and op er a tion.

All electrical wiring must conform to local stand ards. In order to prevent
stray elec tri cal radiation, we rec om mend twisted and shielded input
cables, as also to keep power sup ply cables separated from the input
cables. The con nec tion must be made ac cord ing to the connecting
di a grams.

Before switching on the power supply take care that other equip ment
is not af fect ed. Ensure that the supply voltage and the conditions in the
environment comply with the spec i fi ca tion of the de vice.

Before switching off the supply voltage check the possible effects on
other equipment and the processing system.

WARNING

For electrical installation and com mis sion ing of explosion protected
devices, the data given in the con form i ty cer tifi cate as also the local
reg u la tions for installation of elec tri cal apparatus within explosion pro­ tect ed areas must be considered. The intrinsically safe versions can be
mounted in the explosion hazarded area according to its spec i fi ca tion
only con nect ed to a certifi ed intrinsically safe supply loop with the cor­ re spond ing electrical values.

Electrical Installation

LED, lights during auto zero adjustment

Auto Zero push button

1 & 2: Pins for connection
of FlexProgrammer

1 (+)
4 N. c.

3 (-)
2 N. c.

Plug M12, male

This Ex-approved product is manufactured by:
Baumer A/S
Jacob Knudsens Vej 14
DK-8230 Aabyhoej
Denmark

FlexBar

Zero

1 2

+1

-2

®

Profi bus
2-wire twisted pair with shield

WARNING: According to the Profi bus PA standard the cable shield

®

must be terminated in the cable gland connected to the instrument
housing.
To secure maximum tightness in the gland the correct cable diameter
should be used.

WARNING: The pins 1 & 2 must not be connected to other equipment
than the dedicated FlexProgrammer.
(Max. 15V/50mA on the pins)

PA cable

Installation Manual 5850-016www.baumerprocess.com

Page 1 Design and specifi cations subject to change without notice

Installation

1)

Factory guarantee is void on mechanical damages on the diaphragm.
Die Werksgarantie erstreckt sich nicht auf mechanische Schäden der Membran.
Les détériorations mécaniques de la membrane ne sont pas couvertes par la garantie .
Mekanisk skade på membranen er ikke omfattet af fabriksgarantien.
Mekaniska skador på trycktransmitterns membran omfattas inte av garantin.
Takuu ei koske käytön aikana tullutta mekaanista vauriota kalvossa.

2)

>22 mm

Unpacking the transmitter

If the transmitter is visibly damaged, it should not be put into operation.

Installation procedure

a) Remove protection-cap.
b) Install FlexBar 3431.
If a G1/2A version: Tighten up at 20 Nm.
c) Confi gure the display with a FlexProgrammer.
d) Establish a zero pressure condition (e.g. empty the tank)
d) Press and hold the Auto Zero button to reset the FlexBar.

Mechanical installation and cleaning

The pressure diaphragm must not be touched during installation.
Cleaning with pressurised cleaners and tools may damage the
diaphragm.
Refer to drawing no. 2:

If the transmitter has a 1/2” threaded neck, check before mounting
in a blind hole that the thread length is at least 22 mm. Use a gasket
ø28.6 x ø21.5 mm, made from a material proof against the measuring
medium, and do the clamping with an NV27 mm engineer’s wrench.
FlexBar 3431 can be mounted on a Baumer pressure gauge connec­tion type no. 81 26-92X.

For a FlexBar 3431 with a 3A/DN38 connection an O-ring with the
dimensions ø3.0 x ø19.0 mm must be used.

Mounting the pressure transmitter in closed systems (e.g. a stop cock)
can create overpressure in excess of that permit ted (400%), which
could deform the diaphragm and damage the pressure sensor.
The transmitter must not be exposed to pressure or surge exceeding 4
x span, max. 600 bar though.

The freezing point of process media and condensates must be
checked to prevent unintentional pressure rise when it is freezing.

Radiated heat may create excessively higher opera ting tempera tures
than the allowed -40...85°C (without display).

Adjusting the zero point

With FlexBar 3431 the electronic zero point can be adjusted from

-10...10% of the total measuring range.
The correct zero point pressure must be established prior to adjust­ing the zero point. Tank and pressure transmitter must have the same
temperature. If the pressure transmitter has a relative measuring cell
from 0 bar, the zero point pressure is the same as the atmospheric
pressure or the level in a tank selected as zero point level. A pressure
transmitter measuring absolute pressure has a zero point lower than 1
mbar abs.
When the required zero point pressure has been established, the Zero
push button inside FlexBar must be pressed and held. The LED will
respond with one blink per second. When the actual zero pressure
level has been stored in the memory of the FlexBar the LED will blink
twice a second.
You can revert to the factory setting by reconfi guring the FlexBar 3431
in the PDM setup. The pressure transmitter can change its zero point
slightly, due to mechanical tension and the mounting direction selected
for the pressure diaphragm. Optimal results are therefore achieved
if the zero point is adjusted after the pressure transmitter has been
mounted in place.

Installation Manual 5850-016www.baumerprocess.com

Page 2 Design and specifi cations subject to change without notice