Operating Instructions

Table Of Contents
8.5.19 Auto False Echo Suppression (2.2.5.2.)
Enables a ’learned’ TVT curve to be used in place of the default TVT curve. See Auto False
Echo Suppression (Page 153).
Note
If possible adjust Auto False Echo Suppression parameters with an empty or almost empty
vessel. 
Set Auto False Echo Suppression and Auto False Echo Range during startup, if possible.
Options
OFF Default TVT curve will be used.
* ON ’Learned’ TVT curve will be used.
LEARN ’Learn’ the TVT curve.
1. Determine Range (the distance within which the learned TVT will replace the default TVT).
Measure the actual distance from the sensor reference point to the material surface using
a rope or tape measure, and make allowances for the actual location of the device. 
2. Subtract 2 m (6.56 ft) from this distance, and use the resulting value.
To use Auto False Echo Suppression via SIMATIC PDM: 
1. Open the menu Device – Auto False Echo Suppression and set Range. For more detail
see Auto False Echo Suppression (Page 153). 
2. Select Learn. The device will automatically revert to On (Use Learned TVT) after a few
seconds. 
To set Auto False Echo Suppression via the handheld programmer:  
1. Go to 2.2.5.3. Auto Suppression Range and enter new value.  
2. Go to 2.2.5.2. Auto False Echo Suppression . Press RIGHT ARROW to open Edit Mode. 
3. Select Learn. The device will automatically revert to On (Use  Learned TVT) after a few
seconds.
8.5.20 Auto Suppression Range (2.2.5.3.)
Defines the endpoint of the Learned TVT distance. Units are defined in sensor units.
Values Range: 0.00 to 30.00 m
Default: 1.00 m
1. Press RIGHT ARROW to open Edit mode. 
2. Enter the new value and press RIGHT ARROW to accept it.
3. Set 2.2.5.2. Auto False Echo Suppression (Page 87).
Parameter reference
8.5 Setup (2.)
SITRANS LR260 with mA/HART
Operating Instructions, 11/2019, A5E32337683-AD 87