Sigicom INFRA X20SR, Руководство пользователя

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12 Copyright ©Sigicom AB 2016
Correction factors for different radar placement setups.
Distance L
[m]
Correction
factor
C
for d = 5 [m]
Correction
factor
C
for d = 10
[m]
Correction
factor
C
for d = 20*
[m]
40 1.008 1.031 1.118**
50 1.005 1.020 1.077**
60 1.004 1.014 1.054**
70 1.003 1.010 1.040**
* not recommended distance
** measurement errors larger than 3.5% due to radar placement
The radar placement will be a problem if the distance d is long and
distance L is short, a potential problem could appear if being unable
to setup the radar with a short distance d to the rail. As seen in table
above, this is simply fixed by directing the radar further down the
rail (increase
L ). But then the total range of the radar might become
an issue instead.
In such a situation, a rule of thumbs could be to assure that
70m > 𝐿 > 4𝑑
in order to secure measurements with less than 3.5% error due to
radar placement.
4.5
Mounting check
It is recommended (if possible) to check the setup functionality after
mounting. This is easiest done by waiting for the passage of a
vehicle, then read “LAST value” values from the logger during or
directly after the passage. 5 seconds interval time is recommended
for the test.
By continuously pressing “F2” the last interval value will show in
the display, until it is replaced by a new one. If a reasonable value is
shown when a vehicle is passing by then the unit is set up properly.