6.3.2 Environment memorization process
The sensor starts the surrounding environment memorization process when the Inxpect Safety application
configuration is saved. From that moment, it waits for the system to exit the alarm status and for the scene to be
static up to 20 seconds, then scans and memorizes the environment.
NOTICE: if the scene is not static during the 20 seconds interval, the system remains in a fault status
(SIGNALERROR) and the system configuration must be saved again.
It is recommended to start the memorization process after at least 3 minutes from turning on the system to
guarantee that the sensor has reached the operating temperature.
Only at the conclusion of the memorization process it is possible for the sensor to send masking signals.
6.3.3 Causes of masking
Possible causes of masking signals are the following:
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
There were temperature fluctuations.
6.3.4 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.
6.3.5 Settings
For each sensor, the anti-masking settings are the following:
l
maximum distance from the sensor (range [20 cm/7.87 in, 100 cm/3.28 ft], 10 cm/3.94 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 (3.94-7.87
in).
Level Description Example application
High The sensor 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 sensor 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 sensor 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 sensor 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.
6. Other functions
Inxpect SRE 200 Series | Instruction manual v1.5 DEC 2023|Inxpect SAF-IM-200S_5m_7_00047_en_v1.5|© 2021-2023 Inxpect SpA
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