3
INSTALLATION
30
RM640
www.honeywellprocess.com
34-VF-25-131 iss.1 GLO Feb 2019 US
3.7.1 General notes
LPR and TLPR devices
Causes of interference signals
•
Objects in the tank or silo.
•
Sharp corners that are perpendicular to the path of the radar beam.
•
Sudden changes in tank diameter in the path of the radar beam.
Equipment and obstacles: how to prevent measurement of interference signals
Do not put the device immediately above equipment and obstacles in a silo or pit. This can have
an effect on the performance of the device.
WARNING!
LPR (Level Probing Radar)
LPR (Level Probing Radar)
LPR (Level Probing Radar)
LPR (Level Probing Radar) devices measure level in the open air or in a closed space (a metallic
tank etc.). TLPR (Tank Level Probing Radar)
TLPR (Tank Level Probing Radar)
TLPR (Tank Level Probing Radar)
TLPR (Tank Level Probing Radar) devices measure level in a closed space only. You
can use LPR devices for TLPR applications. For more data, refer to Radio approvals on page 11
.
CAUTION!
Do not install the device above objects in the silo (ladder, supports etc.) or pit. Objects in the silo
or pit can cause interference signals. If there are interference signals, the device will not
measure correctly.
If it is not possible to install the device on another part of the silo or pit, do an empty spectrum
scan.
INFORMATION!
If possible, do not install a nozzle on the silo centerline.
Figure 3-8: Equipment and obstacles: how to prevent measurement of interference signals
1
We recommend that you do an empty spectrum recording if there are too many obstacles in the radar beam (for more
data, refer to
Empty spectrum recording
on page 102).
2
Beam radius of the antenna: refer to the table below. The beam radius increases by increments of "x" mm for each
metre of distance from the antenna.
Содержание RM640
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Страница 20: ...1 SAFETY INSTRUCTIONS 20 RM640 www honeywellprocess com 34 VF 25 131 iss 1 GLO Feb 2019 US ...
Страница 56: ...4 ELECTRICAL CONNECTIONS 56 RM640 www honeywellprocess com 34 VF 25 131 iss 1 GLO Feb 2019 US ...
Страница 120: ...6 OPERATION 120 RM640 www honeywellprocess com 34 VF 25 131 iss 1 GLO Feb 2019 US ...
Страница 164: ...9 DESCRIPTION OF HART INTERFACE 164 RM640 www honeywellprocess com 34 VF 25 131 iss 1 GLO Feb 2019 US ...
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