INST.No.INE-475-P1CE Software Version 1.00
-14-
6.3.1-2) Functions of setting data
Data name
Function
(1)
Calibration curve
No.
An optional number from 1 to 99 can be designated as the calibration curve.
Ordinary It is designated sequentially from “1”.
(2)
Calculation mode Select the calculation mode the calibration curve The calculation mode and
wavelength number differs by the models of IRMA.
•
Calculation mode 1 to 3: The processing becomes the 2-wavelength
processing/3-wavelength processing (R1, S, R2)
on the each calculation mode.
•
Calculation mode 4: Multiple regression calculation that used each
wavelength. The wavelength number differs by the
models of IRMA.
Wavelength
λ
1
λ
2
λ
3
λ
4
λ
5
λ
6
λ
7
λ
8
λ
9
λ
10
Calculation group
Group 1
Group 2
Group 3
Calculation mode 1
R1 S R2
―
― ―
―
―
― ―
Calculation mode 2
―
― ―
R1 S R2
―
―
― ―
Calculation mode 3
―
― ― ―
― ―
R1 S R2
―
Calculation mode 4
λ
1
λ
2
λ
3
λ
4
λ
5
λ
6
λ
7
λ
8
λ
9
λ
10
(3)
Polynomial
coefficient
“a
0
to a
10
”
Polynomial coefficient is calculated by selected calculation mode.
•
Calculation mode 1 to 3: Assume that the calibration curve is represented by
the third-degree or lower-degree polynomial of
y = a
3
x
3
+ a
2
x
2
+ a
1
x + a
0
, where, “y” is the constituents and “x” is the
absorbance (“CH0” data of this detector unit).
•
Calculation mode 4: Calibration curve is calculated by multiple regression
calculation using each wavelength.
y = a
0
+ a
1
LOG(
λ
1) + a
2
LOG(
λ
2) +
····
+ a
10
LOG(
λ
10)
The wavelength number differs by the models of IRMA.
(4)
Correction
expression
coefficient
“b
0
to b
2
”
These coefficients are provided for the quadratic expression correction (zero and
span correction) with reference to the constituents “y”. Assuming that the
constituents after the correction be “Y”, we obtain “Y = b
2
y
2
+b
1
y + b
o
”.
(5)
Low/ High limit
constituents output
These specify constituents at a low limit output and a high limit output on the
analog output scaling. The output is scaled to 4mA at the low limit constituents
and 20mA at the high limit constituents.
(6)
Low/ High limit
constituents alarm
The low limit alarm is activated when the measured value is lower than the low
limit alarm set-point of constituents and the high limit alarm is activated when the
measured value is higher than the high limit alarm set-point of constituents. Use the
operator interface/display unit when the alarm outputs are required.
(7) Preset constituents
By turning on the preset output by key operations or through communications, the
constituents being set as a preset value is displayed and outputted, regardless of the
measured value.
(8) Water absorbance
Decide the water absorbance to compute the surface water ratio for measuring the
moisture content of sands, etc. [This setting is only enable when the surface water
ratio computation shown in (11) of “6.4.1 Setting data” is set to ON.]
The relation between the measured moisture content (%: mass basis moisture
content), the surface water ratio (%) and the water absorbance (%) is;
y
Surface water ratio = (Moisture content – Water absorbance) / (1 + (Water
absorbance / 100)
6. Operation
