Beam sensor states
Beam sensor States Ideal range
minimum to maximum
4or5 2m-30m
2 or 3 5m to 100m
0 or 1 12m tp 100m
LPCB approval
The Beam sensor STATES 0, 1, 2 and 3 are undergoing
approval test at LPCB.
State Definition Application
State 0
Default
detection
A fire is detected when there is a 50% (3dB) fall in signal level, however if the fall is by 90% (10dB) in less than
1second and is maintained for 40 seconds, then a fault is registered. This allows the Control panel to differentiate
between a fire and a fault signal caused by accidental obscuration.
State 1 Normal
sensitivity
A fire is detected when there is a 50% (3dB) fall in signal level, however if the fall is by 90% (10dB) in less than
1 second and is maintained for 40 seconds then a fire is registered.
State 2 Medium
Sensitivity
A fire is detected when there is a 25% (1.3dB) fall in signal level, however if the fall is by 90% (10dB) in less than
1 second and is maintained for 40 seconds then a fault is registered.
State 3
Medium
Sensitivity
A fire is detected when there is a 25% (1.3dB) fall in signal level, however if the fall is by 90% (10dB) in less than
1 second and is maintained for 40 seconds then a fire is registered.
State 4 High Sensitivity
A fire is detected when there is a 10% (0.5dB) fall in signal level, however if the fall is by 90% (10dB) in less than
1 second and is maintained for 40 seconds then a fault is registered.
State 5 High Sensitivity
A fire is detected when there is a 10% (0.5dB) fall in signal level, however if the fall is by 90% (10dB) in less than
1 second and is maintained for 40 seconds then a fire is also registered.
State 15 No detection. This is a total disablement of the sensor.
4188-949 issue 3_05/10_Nano Comms inst. 43
Nano panel based system
Sensor States