91
Reference Manual
00809-0100-4530, Rev DD
May 2016
Rapid level changes
Optimize the transmitter for measurement conditions where the level changes quickly due
to filling and emptying of the tank. As a default standard, a Rosemount 5300 Transmitter is
able to track level changes of up to 1.5 in./s (40 mm/s). When the
Rapid Level Changes
check-box is marked, the transmitter can track level changes of up to 8 in./s (200 mm/s).
The
Rapid Level Changes
check-box should not be used in normal conditions when the
product surface moves slowly.
Product dielectric range
Note
Applicable to “Liquid Product Level” and “Solid Product Level” measurement modes.
Enter the range of the dielectric constant (DC) for the product in the tank. The selected
range of dielectric constant is used for setting the automatically calculated amplitude
thresholds.
Upper product dielectric constant
Note
Applicable to “Interface Level with submerged” and “Product Level and Interface Level”
measurement modes.
Enter the Upper Product Dielectric Constant (DC) as accurate as possible. The Upper
Product Dielectric Constant (DC) is essential for calculating the interface level and the upper
product thickness. In addition, it is used for setting the automatically calculated amplitude
thresholds.
In case it is unknown, use the Dielectric Constant Chart or Upper Product Dielectric
Constant Calculator embedded in the configuration tools as help when configuring the DC.
See
“Product dielectric range/upper product dielectric constant” on page 109
for more
information.
If the dielectric constant of the lower product is significantly smaller than the dielectric
constant of water, you may need to make special adjustments, see
for further information.
“Interface measurements” on page 224
for criteria on the dielectric constants that need
to be fulfilled for interface measurement.
5.4.4
Volume configuration
For volume calculations, you can choose one of the standard tank shapes or the strapping
option. Choose
None
if volume calculation is not used. For the standard tanks, a volume
offset parameter can be specified which can be used for a non-zero volume that
corresponds to the zero level. This may be useful, for example, if the user wants to include
the product volume below the zero level.
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