Baumer Ident OIS-P PC 3100 series, Installation Manual

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OIS-P, PC3141/03 Manual Baumer Ident 21
Environmental influence
3.3 Foreign substances between
antenna and Data Tag
Microwaves penetrate through many foreign, non-
metallic substances with no or very little loss of
signal strength. However, if the reduction in signal
strength should be considerable, an appropriate
reduction in communication distance is
recommended as shown in table 3.a.
Substance Rec. signal strength
adjustment (dB/mm)
1st mm Thereafter
Water 7 0.5
Oil 1 0.2
Grease 1 0.1
Regular car paint 1 Note 1
Metallic car paint 3 Note 2
Paper 0.02 0.02
Plastic 0 - 1 0 - 0.05
Snow 0 - 0.5 0 - 0.2
Ice 0.5 0.1
Table 3.a Recommended reduction of
communication distance as a function
of foreign substance layer thickness.
The signal strength adjustment will
vary slightly, depending on the exact
composition of the contamination,
where it is applied etc.
Note 1: Layers beyond 1 mm not
likely. Adjustment for 0.2 mm
amounts to 0.5 dB.
Note 2: Layers beyond 1 mm not
likely. Adjustment for 0.2 mm
amounts to 1.5 dB.
How the recommended signal strength adjustment
relates to the communication distance can be seen
in diagrams in section 2.2.
3.4 Temperature
The antenna lobe diagrams in section 2 are valid
for temperatures up to +40
°
C.
If the ambient temperature increases or if the Data
Tags are exposed to higher temperatures than +40
°
C, this will result in a reduced signal strength and
a corresponding increase by reduction of the
communication distance should be ensured, as
indicated in table 3.c below.
Product Recommended signal
strength adjustment
+40
°°°°°
C +70
°°°°°
C +110
°°°°°
C
Data Tag
PC3104/32A,/22A
0 dB 2 dB n/a
Data Tag
PC3105/00D
0 dB 2 dB 4 dB
Note 3
Table 3.b Recommended signal strength
adjustment due to ambient temperature.
Note 3: The internal temperature must
be calculated, which will be
done by Baumer Ident on
request.
How the recommended signal strength adjustment
relates to the communication distance can be seen
in diagrams in section 2.2.
Long term exposure of Data Tags to high
temperatures should generally be avoided, as can
be concluded from section 5.2.
3.5 Electromagnetic immunity
The PC3141 system has been EMC-tested
according to the pr ETS 300339 which is required
for the CE-marking. This assures trouble-free
operation in demanding electromagnetical
environments.
Electromagnetic interference in cables
By selecting a suitable communication interface,
using specified cables and proper grounding,
optimum communication reliability is ensured.
Electromagnetic interference on the microwave
link
Industrial noise is typically present in the kHz and
low MHz frequency band. The OIS-P system is
only receptive for frequencies of 2,45 GHz +/- 5%,
so typical industrial noise will not affect the
microwave communication.
Transients from spot-welding equipment or from
switching on other welding equipment, soldering
machines and fluorescent lighting fixtures may
produce short pulses around 2,45 GHz. However,
since the OIS-P system, if interfered, will continue