Honeywell SLG 700 User Manual page 104

Probe End Type:
This parameter specifies how the probe is terminated. For Rod and Coaxial probes the only
available option is None. For Wire probes the available options are Clamp, Weight and Loop.
Probe Length:
This is a factory setting based on the purchase order. Adjustments to this parameter is only
required if the probe has been replaced or cut shorter. This parameter should always be measured
from the reference plane to the effective end of the probe. For a Coaxial probe and a Rod probe
without a centering disk, the effective end of the probe is the physical end of the probe. For a Rod
probe with a centering disk attached, the effective end of the probe is the top surface of the
centering disk. For a Wire probe with an end weight, the effective end of the probe is the top of the
end weight.
Centering Disk Type:
This parameter identifies if a centering disk is present and if so the material that it is made off. If
the centering disk was ordered with the transmitter this will be correctly set when the transmitter
leaves the factory.
Centering Disk Diameter:
If the Centering Disk Type is not set to None, an additional parameter is required to specify the
diameter of the disk. If the centering disk was ordered with the transmitter this will be correctly set
when the transmitter leaves the factory.
Propagation Factor:
Propagation factor will be factory set for the probe type ordered. If the probe is changed or a
customer supplied probe is used, this value may need to be adjusted to scale the apparent
distance to product appropriately. Consult Honeywell for details.
Blocking Distance High:
Blocking distances are areas of the sensor reading range where it is not desirable to search for
reflections, possibly due to poor signal to noise ratios. The Blocking Distance High is the distance
value measured starting from the Sensor Reference Plane. The transmitter will not attempt to
make a reading in this area. The factory-set blocking distance is set to the transition distance high.
It is recommended that the blocking distance is set to the largest value the measurement can
tolerate and that the loop current is adjusted to reach maximum before level reaches the blocking
distance. The minimum value for Blocking Distance High, as well as the transition distances is
shown in the table below.
Blocking Distance Low:
Blocking distances are areas of the sensor reading range where it is not desirable to search for
reflections, possibly due to poor signal to noise ratios. The Blocking Distance Low is the distance
value measured starting from the Probe End. For a wire probe with an end weight, the end of the
probe is considered to be the top of the end weight. The transmitter will not attempt to make a
reading in this area. A minimum value is predefined by the factory to be the same as the Low
Transition Distance.
The minimum value for Blocking Distance Low, as well as transition distances, is shown in the
table below
When in Blocking Distance, set Loop Current to:
This is the action to take regards to loop current when the sensor reading enters Blocking Distance
Low or Blocking Distance High (Default Behavior means that when in Blocking Distance Low, set
to Low Saturation, and when in Blocking Distance High, set to High Saturation).
SLG 700 Series HART Option User's Manual
Page 96 Revision 5