Hochiki FB-1 - Manual (Page 9)

ESP FIREbeam – Installation Manual Page 9 of 19
 2011 Hochiki Europe (UK) Ltd
2-3-0-1340/ISS2/DEC11
Receiver sensitivity starts off at 5% and output power starts at 10%. The beam will start by raising its sensitivity
first and can rise all the way up to 100%, after this the output power will rise. The objective of pre-alignment is to
adjust the output power to the correct levels for the distance to be covered. As there is no reflector we are looking
for a reflection off the far wall. Power levels will rise until they reach a maximum of anything up to 6 to 7% of
received signal strength (figures may fluctuate between these values), once this is achieved the power level will
automatically stop rising any further.
By looking at the table below you need to judge if you are receiving enough power to cover the required distance.
5m.........5% 30m......20% 60m......40% 90m......65%
10m.......10% 40m......25% 70m......50% 100m....75%
20m.......15% 50m......30% 80m.......60%
NOTE: Anything more than these levels is good and continue down to 9. If you are receiving noticeably less read
on below.
These figures are approximate but if you are receiving noticeably less than these figures you may be receiving a
reflection from an object nearby and not the far wall. By moving the beam (looking at the far wall) left (x-) right (x+)
up (y+) and down (y-) you can move the beam path away from the obstacle. By doing this you will be able to
achieve a suitable output power. In extreme cases it may be necessary to physically move the beam head to obtain
a clear line of sight.
Once you are happy with your power readings press enter to accept pre-alignment and confirm these settings by
pressing the
right key
.
NOTE It may be that no reflection is received and power and sensitivity levels rise to their maximum, if this is the
case pre-alignment will automatically register Pre-Align - Complete. Confirm these settings by pressing the
right key.
OR if no reflection is seen
you will see this screen
2.5.3 Stage Three – Manual Alignment
You will now see the manual alignment screen showing anything between 0 and 6%. This is the amount of
received signal with no reflector that the beam is picking up from the environment.