Improving The Location Accuracy Of An Installation - Bosch Security Escort SE2000 Series Training Manual

Security Escort
4.
5.
6.
Reviewing potential problem areas
Review the potential problem areas on the maps with the customer to see which areas cause
them concerns, and which areas they consider acceptable. If the customer considers an area
acceptable, it is typically not worth spending additional time trying to improve the location
accuracy in those areas.
7.5.2

Improving the location accuracy of an installation

Once we have identified those areas that must be improved, what are the options to improve
the computed location accuracy?
Notice!
All changes using the following steps could potentially change the computed locations for all
alarms at or around the changed area. Therefore, after any change is made, the entire vicinity
around the changed area must be verified.
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Robert Bosch (SEA) Pte Ltd
discrepancies, including the actual and computed locations. We recommend using a map
or floor plan and drawing an arrow from the actual alarm location to the reported
location. It is also helpful if all successful alarm locations are marked with a P (passed).
For areas where there are alarm location problems, try facing in different directions from
the same spot.
Generate additional alarms from different spots to fully understand the extent of the
problem.
You should generate alarms in areas adjacent to the area with the problem to see if they
are also affected.
Typically the first thought is to add more receivers in the problem area. Generally this is a
bad approach. If the system was properly designed using the recommended grid layout,
adding extra receivers in any area of the grid will distort the response in adjacent areas
and floors. While it may seem to fix the problem area, typically it will create more
problems in adjacent areas. The exception is when an area is shielded by something such
as wire mesh in the walls that prevent the RF transmitted signal from passing through.
Therefore, additional receivers may have to be added in the shielded area to ensure that
all alarm transmissions will be heard.
Verify that the location of the receivers in the Transponder Database is accurate to their
physical location, and the receivers are indicated to be at the correct floor level. It is also
important that receivers that were physically stacked directly above one another on floors
of a building are also located at the same X and Y coordinates in the database.
Try changing the Transponder Database location of receivers (not the actual physical
location) one at a time while testing the alarm location response, using one of the testing
methods above. For example, if alarms are getting pulled outside a building in one area,
move the closest receiver (in the Transponder Database) to that area a little further into
the building and retest. If the area can be corrected using this method, verify the
surrounding areas to make sure they were not adversely affected. It is generally better if
the correction is done in small steps while verifying the adjacent areas, rather than trying
to correct the entire error in one step.
Starting with version 2.03 and higher, the Security Escort software allows individual
receiver sensitivity to be set in the Transponder Database. Receivers can be adjusted
from 50% to 149% of their normal sensitivity. No physical receiver changes or upgrades
are required. Try changing the Transponder Database sensitivity of receivers one at a
Troubleshooting transponders, points, receivers, and alert units | en 111
Training Manual 2017.08 | V2.18.1.0 | DOC