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8012426/YWL2/3-0/2016-08| SICK
O P E R A T I N G I N S T R U C T I O N S | DUSTHUNTER SP100
Subject to change without notice
PRODUCT DESCRIPTION
2
2.2.7
Non-return valve
When the measuring system is used in applications with overpressure in the duct, it is
possible to protect the sender/receiver unit, external purge air unit and the environment
against the consequences of purge air supply failure by installing a non-return valve on the
purge air connection of the sender/receiver unit (
see “Installation of non-return valve”,
).
2.2.8
Test equipment for linearity test
A linearity test can serve to check the correct measurement function (see Service Manual).
In this case, filter glasses with defined transmission values are positioned in the beam
path and the values compared against those measured by the measuring system.
Compliance within the allowed tolerance means the measuring system is working correctly.
The filter glasses with holder required for the check are deliverable including a carrying
case.
On the sender/receiver unit for internal duct pressure up to +200 kPa, the non-return
valve is part of this unit.