14
58-601 Pulsar
®
Radar Transmitter
2.4.1.5 Standpipes and Stillwells
PULSAR can be mounted in a standpipe or stillwell but
certain considerations should be given:
• Metal stillwells only: Sizes 3–8 inches (80–200 mm).
• Diameter must be consistent throughout length; no reducers.
• Use only horn antennas sized to pipe ID; 3–6"
(80–150mm); 8" pipe can use a 6" horn.
• Stillwell length must cover complete range of measurement
(i.e., liquid must be in stillwell).
• Welds should be smooth.
• Vents: holes <0.5" diameter, slots <0.5" width.
• If an isolation valve is used, it must be a full port ball valve
with an I.D. equal to the pipe diameter.
• Bridles/Bypass Installations: The launcher (index mark)
should be rotated 90° from process connections.
• Configuration must include an entry for PIPE I.D.
See Section 2.6.5.1, Item 35- PIPE I.D.
• There will be some increased dielectric sensitivity; system
GAIN will be reduced when PIPE ID >0.
2.4.2 Installing the Transmitter
• Remove the protective plastic cap from the top of antenna.
• Carefully place the transmitter on the antenna.
• Rotate the transmitter to face the most convenient direction
for wiring, configuration and viewing. Do not tighten the
universal connector (large hex nut) nor the set screw on the
housing base. The transmitter launcher must be oriented
properly for optimal performance.
• Do not place insulating material around any part of the
radar transmitter including the antenna flange.
2.4.2.1 Orientation
The PULSAR transmitter utilizes a linearly polarized,
microwave beam that can be rotated to improve its perform-
ance. Proper orientation can minimize unwanted target
reflections, decrease sidewall reflections (multipath) and
maximize direct reflections from the liquid surface. The index
mark located on the side of the launcher is oriented in the
same direction as the polarization.
The index mark is also present for reference(1 dot: GP/IS or
2 dots: XP). The launcher is considered to be at 0° when
the index mark is closest to the tank wall.
Set Screw
Universal
Connector
Index
Mark
1 dot: GP/IS
2 dots: XP
Index
Mark
inde
x m
ark
45
°
Polarization Pattern
PULSAR Mounted in Stillwell (Bridle)
