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8024592/2019-08| SICK
O P E R A T I N G I N S T R U C T I O N S | NAV210
Subject to change without notice
PRODUCT DESCRIPTION
3
3.7.3
Output of measured values of a second reflective pulse
The NAV210 also measures a potential second reflective pulse and sends this measured
value in a measured value telegram. A second reflective pulse occurs, for example, when
the NAV210 next hits a raindrop. This reflects part of the energy (first reflective pulse).
The other part of the beam continues and is then reflected by an actual object (second
reflective pulse).
Fig. 12: Principle of operation for measuring the second reflective pulse
Important
•
After the first reflective pulse, you must wait a certain period of time before you can
measure with full accuracy again. This depends on the target that the first reflective
pulse reflected.
An application in the connected host can therefore observe the second reflective pulse for
the measurement or ignore the first reflective pulse, for example. This can lead to better
results in dusty environments, for example, or it can even facilitate special applications,
such as measuring through a pane (e.g., in an ATEX environment).
Send pulse
Reflective pulse
1
2
t
