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57-642 ECLIPSE Model 705 Guided Wave Radar Transmitter for Hygienic Industries
4.3 Electronics Mounting
The ECLIPSE Model 705 unit has a removable transmitter
design.
Incorporating a unique high frequency connector, free rota-
tion of the transmitter head is independent of the probe ori-
entation.
4.4 Basic Start-Up
A radar signal is an electromagnetic pulse that reflects at a
change in dielectric. Typical Life Sciences applications are
water for injection (WFI) or high purity water based. High
purity water has a very high dielectric (WFI is approximate-
ly 12-15). This is considered high dielectric from a GWR
standpoint. Furthermore, adding salts or media to the water
drastically increases the dielectric value of the process.
Typical applications are within a metallic vessel that pro-
vides additional benefit to the technology’s signal efficiency.
These factors allow very low gains to reduce the signal-to-
noise ratio. The MAGNETROL ECLIPSE unit uses para-
meters tagged “Dielectric Range” and “Sensitivity” to adjust
the unit’s gain.
4.4.1 Probe Length
The overall length of the probe should be measured after
making any field modifications including bending, cutting,
or adding length. When the unit’s probe length has been
configured in its final form, enter that exact length into the
Probe Length parameter within the transmitter and then
ensure a “Dry Probe” status which confirms that the end of
probe signal is measured correctly.
4.4.2 Blocking Distance and Damping
Other relevant configuration parameters are Blocking
Distance and Damping.
Blocking Distance is a configurable “dead-band” that can be
entered into the unit. Although the Model 705 unit can
typically read from the tip of the probe to the top of the
flange, Life Sciences applications may require the use of
blocking distance to ignore some distance from the top of
the probe. It may be used when an electromagnetic pulse
reverberates along an unusually long nozzle to create a phe-
nomenon called “ringing.” Ringing generates a false level
signal beyond the bottom of the nozzle. In extreme cases,
blocking distance also may be used to ignore spray from a
nozzle that is too close to the probe and cannot be
addressed by reducing sensitivity.
