MG 43 Series - Setting Display Scaling

2343DV2 EM-9422-B Rev.3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
4. SETTING DISPLAY SCALING
■ DISPLAY SCALING
Set display scaling within the range of -1999 to 9999 for measurement range (conformance range).
The display scaling values include A and B. A decimal point can be set in any position.
• Display scaling value A is a display value for the measurement range 0%.
• Display scaling value B is a display value for the measurement range 100%.
• Decimal point position can be set in common for both display scaling value A and B.
e.g. Input code ‘SC’ 0 – 10 mA DC, to display 0 – 10 mA DC input as 0.0 – 100.0%
Measurement range 0%
Measurement range 100%
Input signal 0%
Input signal 100%
Display scaling value A
Display scaling value B
Decimal point position
0 mA DC
10 mA DC
0 mA DC
10 mA DC
0.0%
100.0%
888.8 (1 decimal place)
■ SETTING DISPLAY SCALING (APPLICATION)
When the input signal has to be changed suddenly, the process meter can be used with simple calculation without chang-
ing the input code within the permissible input range (e.g. input code ‘SC’ 0 – 10 mA used for 2 – 10 mA DC). Obtain the
values parallel shifted from the desired display values for the input signal to the measurement range 0% and 100%. Set
the obtained values as display scaling value A and B.
IMPORTANT
• The display accuracy will be worse with smaller input span.
• Desired display values may not be available depending on the input span.
The next paragraph describes how to calculate the display scaling value A and B.
Display scaling value B
100.0%
Display scaling value A
0.0%
Measurement range 100%
10 mA
Measurement range 0%
0 mA
Input signal 100%
10 mA
Input signal 0%
0 mA
Measurement range
Input signal
Display scaling value
Input
Display
Display scaling value B
Display scaling value A
Input signal
0 mA
10 mA
Desired display value