CIAS Elettronica S.r.l. Ed. 2.2
Installation Handbook page 40 to 43 ERMO 482
g) Repeat the pointing operation on the horizontal adjustment of the transmitter module.
h) After having obtained the best pointing, lock the horizontal movement of the TX and RX
modules.
i) Unlock the vertical movement of the RX module and direct it towards the top.
Slowly move it towards the bottom till obtaining the maximum reading on display (2)
and on the led (3) by proceeding as per the horizontal adjustment.
j) Repeat the vertical movement on the TX module. After having obtained the maximum
reading, lock the vertical movement on modules TX and RX.
k) Press key “loop” (17) and check that Loop Closure led “open” (18) turns off; check
that after a recovery period of approx. 2 mins at the Closed Loop,. the value “field Rx”
read on display (2) reaches approx. 6 V 10 %, and that the led at the centre of the
bar is on.
Note: the absolute value precision of this test (6 V ) isn't very important,
because it doesn't depend by the absolute value of microwave (MW) received
signal, but it is related to the instrument STC 95 adjustment.
On the contrary the stability of this test, is directly related to the stability of the
received microwave (MW) signal, for this reason the instability of this test mean that
the RF received signal is in some way perturbed, in this case is necessary to check for
the absence of moving object into the protecte area, or check if the received signal is
too weak and so affected by large amount of noise. In case of uncertainty check the
real working condition by means of a scope connected to RCA connector of STC 95
(see point "S").
l) Press key “” (10) till led “V Rag Rx” (7) is on. Check that a voltage value within 2,5
6,5 V . is read on the display. This AGC voltage value is directly proportional to the
distance between the transmitting and receiving heads.
m) Press key “” (10) till the Sensitivity Measurement led “sens Rx / Tx” (6) is on.
Operate on the SEN trimmer present in module RX (fig. 10) till a value within 0,3 and 9
V 5 % is read on the display. Note that the value of 0,3 V corresponds to the
maximum sensitivity, and that value 9 V corresponds to the minimum sensitivity.
The alarm crossing tests usually are performed with a walking person (standing) moving
at a speed of 0.5 m/s. We suggest to start this tests with the sensitivity adjusted at
50 % (trimmer position) and the integration adjusted at 40 % (trimmer position).
The final sensitivity adjustment must be related to the specific site requirements.
Note: Too much Sensitivity can cause unwanted alarms. We suggest to adjust the
max. sensitivity at no more than 75 % (trimmer position), which correspond at about 1,6
V . Too low sensitivity can miss alarm in case of little dimension intruder.
We suggest to adjust the min. sensitivity at no less than 25 % (trimmer position), which
correspond at about 6,7 V .
n) Adjust the INT trimmer on module RX (figure 9) till obtaining the required Integration
(max clockwise). The integration function act on intruder crossing speed. The alarm
crossing tests usually are performed with a walking person (standing) moving at a speed
of 0.5 m/s. The final integration adjustment must be related to the specific site
requirements.
To Next Page
Loading...
