Instruction Manual

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SBV System Series| Instruction manual v1.2 DEC 2021 |SAF-UM-SBVBus-en-v1.2|© 2021 Inxpect SpA
4. Functioning principles
4.11.3 Causes of masking
Possible causes of masking signals are presented as follows:
l an object that obstructs the field of view of the sensor has been placed in the detection field.
l the environment in the detection field changes significantly, for example, if the sensor is installed on
moving parts or if there are moving parts inside of the detection field.
l the configuration was saved with sensors installed in an environment that is different from the working
environment.
l temperature fluctuations.
4.11.4 Masking signal when the system is turned on
If the system was off for several hours and there were temperature fluctuations, the sensor might send a false
masking signal when it is turned on. The safety outputs activate automatically within 3 minutes when the sensor
reaches its working temperature. This does not happen if this temperature is still very far from the reference
temperature.
4.11.5 Settings
The anti-masking settings are the following:
l distance from the sensor (max. 1 m/3.3 ft, 10 cm/3.9 in steps) in which the function is active.
l sensitivity
These are the four levels of sensitivity:
Note: the function has a tolerance area where the actual detection of a masking object depends on the RCS of the
object and on the sensitivity level set. The high sensitivity level has the largest area, about 10-20 cm (3.9-7.9 in).
Level Description Example application
High The system has the highest sensitivity to
changes in the environment. (Suggested
level when the field of view is empty up to
the set masking distance)
Installations with an empty environment
and a height of less than one meter, where
objects could occlude the sensor.
Medium The system has low sensitivity to changes
in the environment. Occlusion must be
evident (deliberate tampering).
Installations with a height of more than one
meter, where masking is likely to occur only
if voluntary.
Low The system detects masking only if the
sensor occlusion is complete and the
objects are highly reflective (e.g. metal,
water) near the sensor.
Installations on moving parts, where the
environment is changing continuously, but
where static objects may be near the sensor
(obstacles on the route).
Disabled The system does not detect changes in the
environment.
WARNING! If the function is
disabled the system cannot signal
the presence of objects that might
impede normal detection. See
"Checks when the anti-masking
function is disabled" on the next
page.
See "When to disable" on the next page.
To set the distance, in the Inxpect Safety application, click Settings and then Sensors.
To change the sensitivity level or disable the function, in the Inxpect Safety application click Settings and then
Sensors.