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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
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PRODUCT DESCRIPTION
Zero value measurement
The sender diode is switched off for zero point control so that no signal is received. This
means possible drifts or zero point deviations are detected reliably in the overall system
(e.g., due to an electronic defect). A warning signal is generated when the “zero value” is
outside the specified range.
Control value measurement (Span test)
Sender beam intensity changes between 70 and 100% during control value determination.
The light intensity received is compared against the standard value (70%). The measuring
system generates an error signal for deviations greater than ±2%. The error message is
cleared again when the next function check runs successfully. The control value is deter-
mined with high precision through statistical evaluation of a high number of intensity
changes.
Contamination measurement
For contamination measurement the receiver optics is slewed into a reference position
and the scattered light intensity is measured. The measured value determined and the
value defined as factory setting are used to calculate a correction factor. This fully compen-
sates any contamination that occurs.
A value between live zero and 20 mA is output on the analog output for contamination
values < 40% ; when this value is exceeded, the “Malfunction” status is output (on the
analog output the set error current;
see “Factory settings”, page 63
analog outputs parameters”, page 65
Fig. 4: Contamination and control value measurement
Receiver optics in reference position
