Setting The Level Offset; Setting The Vessel Height; Setting The Level Unit; Setting The Sensor Offset - ABB LLT100 Operating Instructions Manual

6.8 Setting the level offset

A level offset might be necessary in situations where the
measured level is different from the actual level because of the
nature of the measured substance.
For example, in a vessel containing fermenting red wine, a
solid cap forms naturally on top of the fermenting liquid during
the fermentation process. By entering the depth of this cap in
the level offset, you could obtain the actual level of liquid in the
vessel by offsetting the depth of the cap.
To set the level offset:
1. From the Device Setup menu, select Level Offset.
2. Edit the level offset and press OK. This offset will be applied
to all measurements made in the vessel.

6.9 Setting the vessel height

The vessel height (or Ullage Reference point) is the physical
height of the vessel whose level you want to measure.
To set the vessel height:
1. From the Device Setup menu, select Vessel Height (URP).
2. In the Vessel Height (URP) screen, edit the vessel height
value and press OK.

6.10 Setting the level unit

You need to set the unit used to indicate the material level
inside the monitored vessel.
To set the level unit:
1. From the Device Setup menu, select Level Units.
2. In the Level Units screen, select the unit (m, cm, mm, ft,
in) and press OK.

6.11 Setting the sensor offset

The sensor offset, as shown in Figure 15, "General model", on
page 15, is the distance separating the LLT100 from the top
of the vessel. It represents the volume where solids or liquids
can not accumulate. This distance is taken into account when
calculating ullage, for example.
To edit the offset:
1. From the Device Setup menu, select Sensor Offset.
2. From the Sensor Offset menu, edit the value and press
OK.

6.12 Selecting the measurement mode

The measurement mode needs to be selected based on the
intended application of the instrument being configured (for
more information, see Table 2 on page 17).
To set the measurement mode:
1. From the Device Setup menu, select Measurement Mode.
2. From the Measurement Mode menu, select the appropriate
mode (Standard, Clear Liquid, Positioning, Dust and
Vapor) and press OK.

6.13 Configuring filtering options

The LLT100 filtering feature is designed to filter out data that
could negatively impact the resolution of the measured level
(spikes, obstructions in the beam by mixer blades, lack of
signal, etc.)
To configure the filtering function, see chapter 7, "Configuring
filtering", on page 23.
OI-LLT100-EN Rev. D | User Guide 21