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Anti-masking
This function consists of detecting undue obstructions in the sensor lens, ensuring that the sensor’s operation is not impai-
red if its detection area is obstructed.
If the lens is obstructed, the sensor starts counting for 30 seconds. While the tamper attempt remains, the red LED flashes
at regular intervals and the TROUBLE and ALARM outputs remain open, indicating sensor masking.
After clearing the lens, the sensor automatically detects the restoration of operation and returns to the normal state.
PROB
ALARM
30s
= 30 cm
~
= 30 cm
~
Position change
This function consists of monitoring undue changes in the sensor installation angle, ensuring that it does not become
unusable if its installation position is changed.
Upon detecting a change in the installation position, the sensor starts counting for 30 seconds. While the tamper attempt
remains, the red LED flashes and the ALARM and TROUBLE outputs open for 3 seconds, indicating sensor masking. After
3 seconds the sensor returns to normal status.
PROB
30s
3s
Power supply voltage monitoring
The IVP 9000 MW MASK periodically monitors its supply voltage.
When detecting supply voltage below 9 volts, the red LED periodically flashes and the PROBLEM output remains open as
long as the supply voltage is below the recommended level.
PROB
< 9 V
