User's Manual

PL-611 IQ Radar 300 Page 49
Applications
Applications Applications
Applications
Application Examples
These IQ Radar 300 applications examples can be used as setup references. The
parameter value tables relate the values to the functions.
Application Example: Asphalt in Storage Tank
Note: The minimum distance from the antenna face to the target is limited by the
near blanking, P800.
The application is to obtain a level
measurement and corresponding 4-20 mA
output proportional to asphalt levels in a
storage tank. The bottom of the antenna
flange is 5m from the tank bottom. The empty
level is 0m (bottom) and the full level (span) is
4.5m from the bottom. The maximum rate of
filling or emptying is about 0.1m/min. In the
event of a loss of echo, the IQ Radar 300 is to
go into fail-safe Hi after 2 minutes.
Asphalt build-up on the rod antenna does not
affect performance.
Parameter Enter
P999
----
master reset
P001
1
mode of measurement = level
P002
1
material = liquid
P003
2
measurement response = 1m/minute
P004
240
antenna
= dielectric rod, standard
length
P005
1
units = metres
P006
5
empty distance = 5m
P007
4.5
span = 4.5m
P070
2
fail-safe timer = 2 minutes
P071
1
fail-safe = Hi
P820
1
algorithm = factory
P830
4
TVT type = factory
P837
(Note below)
2 & 1
Auto Near TVT = 0 (factory set)
Note: Only set P837 if product is at least 2.5m (78”) away. If closer, leave P837 at 0
00
0
until such time the level drops below 2.5m (78”).
Run: To start normal operation, press the PROGRAM key .
Empt
y
(P006)
Span
(P007)