Baumer Flex Bar 3431 - Manual (Page 2)

Page 2 Design and specifi cations subject to change without notice
Installation Manual 5850-016 www.baumerprocess.com
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 connec-
tion type no. 81 26-92X.
Installation
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.
>22 mm
2)
1)
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 adjust-
ing 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.