SICK DUSTHUNTER SP100 Ex-3K, Руководство по эксплуатации

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83 8020216/19YN/V3-0/2020-12| SICK O P E R A T I N G I N S T R U C T I O N S | DUSTHUNTER SP100 Ex-3K
Subject to change without notice
CONFIGURING
9
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)
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Enter the regression coefficients
There are two options:
– Direct input of K2, K1, K0 in a measured value computer.
– Use the regression function of the measuring system (use without measured value
computer).
In this case, the correlation to the scattered light intensity has to be determined. To do
this, calculate the regression coefficients cc2, cc1, cc0 to be entered in the mea-
suring system from K2, K1, K0.
Using (2) in (1), the result is as follows:
Using (3), the result is as follows:
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Now enter the regression coefficients cc2, cc1 and cc0 determined in directory
“Configuration/Application parameters” (
see “Defining regression coefficients”,
page 76 ) (set sender/receiver unit to “Maintenance” state and enter the Level 1
password).
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After entering, set the sender/receiver unit to “Measurement” mode again.
c K2 I
out
2
⋅
K1 I
out
⋅
K0 + + =
(1)
I
out
LZ SL
20mA LZ –
MBE
-----------------------------
⋅
+ =
(2)
NOTE:
In this case, the regression coefficients set in the sender/receiver unit and the
measuring range set in the control unit may no longer be changed anymore as
this will impair the calculation of the dust concentration from the scattered light
values. The dust concentration is displayed in mg/m³ on the LC display of the
control unit as an uncalibrated value.
c cc2 SL
2
⋅
cc1 SL
⋅
cc0 + + =
(3)
c K2 LZ SL
20mA LZ –
MBE
-----------------------------
⋅
+
 
 
2
K1 LZ SL
20mA LZ –
MBE
-----------------------------
⋅
+
 
 
K0 +
⋅
+
⋅
=
cc1 2 K2 LZ K1 +
⋅ ⋅ ( )
20mA LZ –
MBE
-----------------------------
 
 
⋅
=
cc0 K2 LZ
2
⋅
K1 LZ
⋅
K0 + + =
cc2 K2
20mA LZ –
MBE
-----------------------------
 
 
⋅
2
=