15
8011703/XF49/V3-1/2019-09| SICK
O P E R A T I N G I N S T R U C T I O N S | VICOTEC320
Subject to change without notice
PROJECT PLANNING
4
Fig. 4: VICOTEC320 fitting height
Fitting location selection of the respective sensor pairs depends primarily on the following
criteria:
●
Mount the sensors at a safe distance from traffic movement (see for example Section 2
of the German “Richtlinie für die Ausstattung und den Betrieb von Straßentunneln
RABT”, version 2006 (Regulations governing equipping and operating road tunnels)).
●
Good access for maintenance and checking work must be ensured. Locate the sensors
in a protected recess when possible.
●
Do not locate sensors in close vicinity to ventilators or in the fresh air flow from blowout
units so that the measured value records the effective concentration ratios.
●
The measuring beam must run lengthwise between sensors and must not be hindered
by fixtures or vehicles passing each other. Fixtures that shine (e.g. emergency exit signs)
should be at least 1 m from the optical axis.
●
No reflecting paint should be on the wall between sensors.
●
Maintain a distance of 10
±
0.1
m between both sensors.
●
Plan sufficient clearance to be able to flap or remove the enclosure cover.
Fitting options:
●
Both sensors on a wall in a recess (recommended).
●
Both sensors on a wall above the side strip; requires safety measures for maintenance
work in cramped conditions.
VICOTEC320 sensor
2.8 … 4.5 m
400
Measured values of gases are kept constant at first when the light beams are
interrupted. A malfunction message is sent to the evaluation unit when interruptions
last longer than two minutes.
