Operating Manual

Chapter 5 Radar Fine Tuning Accu-Wave
5-4 TN Technologies
“Material Type and Measurement Head Setup” Menu (continued)
Display Comments
flange mounted seal
velocity correction
value = 0.000
NEXT↓↓ HELP→→
Displayed if “antenna with flange mounted seal” is
selected above. Enter velocity correction value (in cm)
to correct for the reduced propagation velocity of the
process seal(s). See Error! Reference source not
found.. If this value is left at zero, the process seal
will induce a small offset error.
Direct Entry Code: ‘086003’
spectrum
count to average 1
(1 - 64)
NEXT↓↓ HELP→→
Increase number of averages to improve measurement
on non-agitated low dielectric materials such as light
hydrocarbons. Values over 8 can slow the response of
the gauge. Do not use values > 1 on agitated to
turbulent surfaces.
Direct Entry Code: ‘022004’
Optimize system for
best Accuracy
Chg to “Resolution”→→
Continue as is.↓↓
[Service only item]
Use default value for best accuracy. Changing to
“Resolution” can somewhat improve ability to resolve
closely spaced echoes at the cost of a slight decrease
in the accuracy of the distance/level measurement.
Modify Range of Measurement
To maximize resolution and minimize false echoes, the system establishes a Range of
Interest (ROI) over which it looks at candidate echoes. The default ROI is based on values
entered during the primary measurement setup (see page 3-2). If the primary measurement
is level, the ROI extends from the zero level point to the maximum level point. If distance
is the primary measurement, the ROI extends from the zero distance point to the maximum
distance point.
Using the “Modify Range of Measurement” menu items, the ROI can be modified to allow
measurements below the zero level (readout will show a negative level) or above the
“maximum” level. Alternately, the ROI can be set to exclude the zero level point.
The slope correction and distance offset correction entries allow you to fine tune the
gauge’s distance measurement to correct for any variations due to the gauge installation or
to adjust the gauge’s readout to match the distance / level readings from another level
measuring device.