SICK DUSTHUNTER C200 - Calibrating Dust Concentration Measurement Based on Scattered Light Measurement

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8011952/YWL2/3-0/2016-08| SICKOPERATING INSTRUCTIONS | DUSTHUNTER C200
Subject to change without notice
4 START-UP AND PARAMETER SETTINGS
4.4.7.2 Calibrating dust concentration measurement based on scattered light measurement
▸ Select device file “MCU”, set the measuring system to “Maintenance” mode
▸ Enter the Level 1 password (see “Password and operating levels”, page 84).
▸ Select the “Configuration / IO Configuration / Output Parameters DUSTHUNTER”
directory (see “SOPAS ET menu: MCU/Configuration/IO configuration/Output Param-
eters”, page 71) and assign the “SI” (scattered light intensity) measured variable to an
analog output.
▸ Estimate the measuring range required for the dust concentration in operational state
and enter this in the
“Analog Output 1 (2/3) Scaling” field assigned to the selected
analog output assigned to the scattered light intensity.
▸ Select the “Configuration / Application Parameter” directory see “SOPAS ET menu: DH
C200/Configuration/Application parameter (example)”, page 64) and then select
“Scattered light” in the “Primary measuring principle” field.
▸ Deactivate “Maintenance” mode.
▸ Carry out the gravimetric comparison measurement according to DIN EN 13284-1.
▸ Determine regression coefficients from the mA values of the analog output for
“Scattered light intensity” and the actual dust concentrations measured gravimetrically.
c: Dust concentration in mg/m³
K2, K1, K0: Regression coefficients of the function c = f (I
out
)
I
out
: Current output value in mA
SI: Measured scattered light intensity
LZ: Live Zero
MBE: Defined upper range limit value
(value entered for 20 mA;
normally 2.5 x fixed limit value)
cK2I
out
2
⋅ K1 I
out
⋅ K0++=
(1)
I
out
LZ SL
20mA LZ–
MBE
-----------------------------
⋅+=
(2)