Milltronics IQ Radar 160, Instruction Manual, Page: 41 / 81

PL-550 IQ Radar 160/160 Ex Page 41
Operation
Operation
Overview
The IQ Radar 160/160 Ex is a level measuring device for use with liquids and
slurries. Using advanced pulse radar technology, the device calculates
material level by first emitting a series of radar pulses and then analyzing their
reflections.
The device consists of an enclosed electronic component, mounted to a
flanged antenna component. The electronic component generates a 5.8 GHz
(U.S.A. 6.3 GHz) radar signal, which is directed to the antenna, waveguide, or
horn.
The radar signal is emitted axially from the antenna and propagates along this
axis in a defined conical beam decreasing in strength at a rate inversely
proportional to the distance.
The radar pulse detects the interface between the dielectric constant of the
atmosphere, and that of the material being measured. Electro-magnetic wave
propagation is not sensitive to the temperature and atmospheric conditions or
variations in the vessel.
The series of echoes from the pulses transmitted are sensed by the antenna
during the receive period of the electronics. The echoes are stored as a
profile of the activity in the vessel. The profile is analysed and the distance of
the material surface to the radar antenna is determined. This distance is used
as a basis for display of material level and mA output.
Transceiver
The IQ Radar 160/160 Ex transceiver operates under 1 of 5 sets of preset
conditions (P003), summarized as follows:
parameter
value
measurement
response
echo
verification filter
fail-safe
timer
1 0.1 m/min slow on on 100
2 1 m/min • on on 10
3 10 m/min • on on 1
4 100 m/min • off on 0.1
5 1000 m/min fast off off 0
When the echoes are received, the relevant echo extraction technique (P820
and P830) is applied to determine the true material echo.