Baumer Ident OIS-P PC 3100 series, Installation Manual, Page: 22 / 46

22 Baumer Ident OIS-P, PC3141/03 Manual
Environmental influence
communication from the point of interference,
rather than having to retransmit an entire message,
such short transients would merely increase the
required communication time by a small fraction.
If strong microwave fields from for instance
industrial microwave dryers can be suspected, an
on-site survey by a OIS-P specialist should be
carried out to determine proper installation
procedures.
3.6. Conclusions on environmental
influence
As shown, the OIS-P PC3141 system is highly
unsensitive to the typical industrial environment.
Still, common sense must be used when planning
an installation and some general rules of thumb
can be established.
1. It is recommended that installation is planned
in such a way, that communication at maxi-
mum specified distance and maximum
specified misalignment is avoided at the same
time. Thereby the access range becomes
longer, thus making object positioning less
critical and the communication capacity higher.
2. To establish if a reduction of the communi-
cation distance should be considered, the
following table will be of help. By adding the
recommended dB signal strength increase for
the factors that apply for your particular instal-
lation and comparing the total with diagrams in
section 2.2, a general understanding of a
suitable decrease in communication distance
is received.
Aspect Rec. signal
strength
adjustment
Metal in/close to the comm. lobe
(section 3.2)
- Communication in motion
0 dB
- Communication at standstill 0 - 6 dB
Foreign substances between
Data Tag and antenna
0 - 3 dB
(section 3.3)
Temperature
(section 3.4)
- Data Tag below +40
°
C 0 dB
- Data Tag at +70
°
C 2 dB
- Data Tag at +110
°
C 4 dB
Electromagnetic interference 0 dB
(section 3.5)
Table 3.c Summary on environmental influence
on communication distance.
Electromagnetic interference and metal in the
communication area when reading in motion, will not
require a reduction of the communication distance.
This will only result in a slightly longer
communication time, which should be added to the
data from the table 2.1.
3. To finally define the optimum communication
distance, on-site testing is recommended. This is
especially important when there is plenty of metal
in the communication area and communicating is
performed at standstill, as table 3.c indicates.
On-site testing is facilitated by the installation
tools available.