itaia Photometer FM-1, Руководство по эксплуатации

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Operating manual: PHOTOMETER FM-1 4
2. Guideline for Connection and Use of Photometer
2. 1. Field of Use
Photometer is designed for measuring and regulating illumination in traffic areas. Using it
we can provide adequate road ilumination at any time and any light conditions. It's
primary application is illumination control for tunnels and under passes based on L
20
measurement according to CIE standard. Photometer FM-1 is provided with analogue
U/I output for PLC or tunnel SCADA connection. For local illumination control 4-channel
230
V AC programmable outputs are available. Measuring range, output channel
switching and time averaging interval are PC programmable using software provided.
2. 2. Mounting and Placement
Photometer comes with wall fixture. Pole fixture is also available
(optional)
.
For light conditions measuring at the entrance of the tunnel, install the photometer at the
stopping distance before the entrance portal. It should be mounted at height approx.
4,5 m and pointed directly to the entrance of the tunnel. When mounting on the pole,
make shure, the pole has proper grounding!
For in-tunnel light conditions measuring
(allways choose full stainless-steel-housing option)
, the
photometer should be pointed to the spot one reach in 3 seconds at maximum allowed
speed. In this case the driver’s view cannot be simulated very accurately due to
mounting height versus distance, hence the measuring result must be adopted by
multiplying with a constant
(usually between 1.05 and 1.20)
.
Once mounted, undisturbed view field must be provided for the photometer. There
should be no disturbing objects, either any light sources or light reflecting objects in it's
view field vicinity. Any of these can considerably affect the measuring accuracy.
2. 3. Connections
Photometer is connected to the mains power supply 230 V AC and to the tunnel light
controlling system. Cables with 3-7 leads at minimum 0.75 mm
2
must be used for 230 V AC
power supply and contactor outputs. For analogue U/I output and communication coaxial 2-3
lead data cable is recommended. Maximum connection distance is up to 400 metres. For
parametric setup connect the photometer with personal computer and run software.
Connection distance can be up to 20 metres for RS-232
(200 m for RS-485 –optional)
.
All necessary connectors are accessible by removing rear cover (
see Pictures 1, 2 and Table 1
).
After final connection and successful commission tighten well all cable glands and place
provided desiccant bag in the photometer housing pushing it towards front window. Make
sure it is not touching any electrical part!