N O Z Z L E S
Improper installation in a nozzle creates “ringing” (unde-
sired signals) which can adversely affect measurement. The
antenna should always be mounted such that the active
section of the antenna is a minimum of 0.5" (13 mm)
below the nozzle. Be sure to include any nozzle dimension
that may extend down inside the vessel. Refer to Figure 10.
Antenna extensions are offered to allow the PULSAR Model
R86 transmitter to work reliably in nozzles with an “L”
dimension up to 72" (1.8 m).
O R I E N T A T I O N
The PULSAR Model R86 transmitter utilizes circular
polarization. This means that the microwave beam does
not need to be manually adjusted (rotated) during
commissioning as is necessary with other radar transmitters.
The result is a much simpler start-up process.
M O U N T I N G
5
0.50" (13 mm)
Minimum
2" (50 mm)
" L " Dimension (Nozzle Height)
Figure 10
To limit the temperature exposure to the transmitter in high
temperature applications, a heat extension (032-6922-001) is
required between the antenna and transmitter. Refer to
“Operating Temperature Range” chart on page 6.
T E M P E R A T U R E E X T E N S I O N
H E A T E X T E N S I O N F O R U S E W I T H H I G H
T E M P E R A T U R E / H I G H P R E S S U R E A N T E N N A S
The PULSAR Model R86 can be mounted in a standpipe
or stillwell but certain items must be considered:
•
Metal stillwells only:
Inside diameter 1
3
⁄
4
–8 inches (45–200 mm).
•
Diameter must be consistent throughout length; no
reducers or gaps.
•
Use only horn antennas sized to pipe ID; 1
1
⁄
2
"–4"
(44–100mm); 8-inch pipe can use 4-inch horn.
•
Stillwell length must cover complete range of
measurement (i.e., liquid must be in stillwell).
•
Welds should be smooth.
•
Vents: holes <0.125" (3 mm) diameter,
slots <0.125" (3 mm) width.
•
If an isolation valve is used, it must be a full port
ball valve with an I.D. equal to the pipe diameter.
•
Configuration must include a non-zero entry for
PIPE I.D parameter.
S T A N D P I P E S A N D S T I L L W E L L S
