MG 43 Series - Page 24

2443DV2 EM-9422-B Rev.3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
■ CALCULATION OF DISPLAY SCALING
Refer to the following example to calculate the display scaling value A and B.
Example: 43DV2-SCx-R
Measurement range
Input signal
Desired display value
0 – 10 mA DC
2 – 6 mA DC
0.0 – 100.0%
Calculate the display scaling value A and B with the following formulas.
SA =
Rz × Dspan + Dz × Is – Ds × Iz
Rz Measurement range 0%
Ispan
Rs Measurement range 100%
Iz Input signal 0%
SB =
Rs × Dspan + Dz × Is – Ds × Iz
Is Input signal 100%
Ispan
Dz Desired display value 0%
Ds Desired display value 100%
Ispan Input span (Is – Iz)
Dspan Display span (Ds – Dz)
SA Display scaling value A
SB Display scaling value B
(1) Display scaling value A (SA)
In the above formulas, omit the decimal point for the desired display
values.
Ispan = 6 – 2 = 4
Dspan = 1000 – 0 = 1000
SA =
(0 × 1000) + (0 × 6) – (1000 × 2)
4
=
0 + 0 – 2000
=
-2000
= -500
4 4
(2) Display scaling value B (SB)
SB =
(10 × 1000) + (0 × 6) – (1000 × 2)
4
=
10000 + 0 – 2000
=
8000
= 2000
4 4
From the above calculations, the display scaling value A is -500, and B is
2000.
IMPORTANT
Setting the calculated display scaling value A or B below -1999 or over 9999 is not available. Change the display digit
number in such a case.
0 mA 10 mA
Measurement range
Input signal
Desired display value
Display scaling value
2 mA 6 mA
100.0%0.0%
Display scaling value A Display scaling value B
Display
Input signal
Input
0
(Dz)
0 mA
(Rz)
2 mA
(Iz)
-500
(SA)
2000
(SB)
10 mA
(Rs)
6 mA
(Is)
Desired display value
1000
(Ds)