4.3.2
Ambient conditions when used outdoors
Overview
Table 4: Ambient conditions when used outdoors
Ambient conditions
1)
Rain
≤ 10 mm/h
2)
Snowfall
≤ 3 mm/h (SWE, Snow Water Equivalent)
3)
Fog
≥ 50 m (MOR, Meteorological Optical Range)
1)
Under the specified ambient conditions, a 99% availability can generally be achieved using the following
settings:
•
Multiple sampling: n = 4
•
Protective field size: 4 m at 275°
•
Object resolution: d = 70 mm
These values were determined statistically using a simulation based on real measurements.
A high availability is achieved when using smaller protective fields and a higher multiple sampling setting.
2)
Equivalent to strong rain.
3)
Equivalent to moderate snowfall.
Ambient conditions can affect the safety laser scanner. This may impair the machine’s
availability. That is to say, the safety laser scanner switches the machine off, although
no people are located in the protective field. When using the device for outdoor applica‐
tions, you need to take the ambient conditions into account and take suitable remedial
measures.
Direct weather influences can prematurely age the device.
To protect the device from ambient conditions, it is necessary to implement one of the
following measures:
b
Attach a weather hood,
b
Mount the device in a protected area of the vehicle or machine,
the machine or vehicle’s paneling", page 32
.
Further remedial measures:
b
Set multiple sampling to n ≥ 4 if the resultant response time permits this.
b
Configure the protective field to be as small as possible. (The smaller the moni‐
tored area, the higher the availability of the machine.)
b
Make provisions to transfer the safety function across to another monitoring sys‐
tem.
b
If permissible, make provisions to allow the safety system to be manually
bypassed if a suitably trained person is monitoring safe operation.
Temperature
The temperature of the device must be at least –10 °C when switched on. At lower tem‐
peratures the device must be warmed up before it is switched on.
Wind
Strong winds can further cool the device. If exposed to strong winds, the device may
switch off even at temperatures within specification.
Remedial measures:
b
Use a weather hood.
b
Mount the device in a protected area of the vehicle or machine.
Ice on the optics cover
Ice on the optics cover can affect the safety laser scanner. This may impair the
machine’s availability. That is to say, the safety laser scanner switches the machine off,
although no people are located in the protective field.
4
PROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | outdoorScan3 Core I/O
8023152/160F/2019-11-14 | SICK
Subject to change without notice
