13
58-601 Pulsar
®
Radar Transmitter
2.4.1.3 Obstructions
Almost any object that falls within the beam pattern will cause
reflections that may be misinterpreted as a false liquid level.
Although PULSAR has a powerful False Target Rejection
routine, all possible precautions should be taken to minimize
false target reflections with proper installation and orientation.
2.4.1.4 Nozzles
Improper installation in a nozzle creates “ringing” that will
adversely affect measurement. The antenna should always be
mounted so the active section of the antenna is a minimum
of 0.5" (12mm) outside the nozzle. Antenna extensions are
offered to allow the PULSAR transmitter to work reliably in
nozzles with “L” dimensions of 1" (25 mm), 4" (100mm),
8" (200mm) or 12" (300mm). Standard antennas (no
extension) are shown below for reference. See Section 3.6.5
for dimensional drawings of all antenna designs including
nozzle extensions.
0.50" (13 mm)
Minimum
2" (50 mm)
Minimum Diameter
Dielectric Rod Antenna
Coupling
2" (50 mm)
2" (50 mm)
8" (200 mm)
Horn Antenna
" L " Dimension
2.8
(55)
0.68 (17) Thread
Engagement
A
C
B
D
∅
3
(76)
H
∅
Aperture
Model #
Antenna
Extension
(maximum “L”
dimension)
All
All
BSP
8th Digit
Dim A
Dim B
Dim C
0
1" (25 mm)
2.2 (56)
11.1 (282)
3.0 (76)
1
4" (100 mm )
5.1 (130) 14.0 (356)
5.9 (150)
2
8" (200 mm)
9.1 (231) 18.0 (457)
9.9 (251)
3
12" (300 mm)
13.1 (333) 22.0 (559) 13.9 (353)
Antenna Extension O.D.
Dimension D
TFE Rod
∅
1.625 (41)
PP Rod
∅
1.50 (38)
All-Plastic
Rod
∅
1.625 (41)
Model #
Antenna
Extension
(maximum “L”
dimension)
3" Horn
4" Horn
6" Horn
8th Digit
Dim H
Dim H
Dim H
0
1" (25 mm)
2.7 (51)
1
4" (100 mm )
N/A
4.6 (117)
2
8" (200 mm)
8.4 (213)
8.3 (211)
3
12" (300 mm)
12.4 (315)
12.4 (315)
Aperture
2.95" (75 mm)
3.75" (95 mm)
5.75" (146 mm)
DIELECTRIC RODS
HORNS
