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47
47DM OPERATING MANUAL EM-9510-B Rev.6
IMPORTANT
• The bargraph lower and upper limits change according to changes of the display scaling values. The bargraph lower
limit is reset to the same value as the display scaling value Zero, and the upper limit is reset to the same value as the
display scaling value Span. After setting the display scaling values, the bargraph lower and upper limits can be set
arbitrarily.
• When the high-pass filter is set to “ON”, the display scaling range is reset to the one with 0 as 50% regardless of the
display scaling settings. Refer to 17. DETECTING STEEP INPUT CHANGES for details.
• Both normal scaling (display scaling value Zero < display scaling value Span) and inverted scaling (display scaling
value Zero > display scaling value Span) can be set within the range of -20000 to 100000.
■
Normal Scaling
The display value increases when the input signal increases.
Display
Span
Zero
Display Scaling
Zero
Span
Input
Input Scaling
■
Inverted Scaling
The display value decreases when the input signal increases.
Input
Span
Input Scaling
Zero
Zero
Span
Display Scaling
Display
■
RELATION BETWEEN INPUT SCALING AND DISPLAY SCALING
The relation between input scaling and display scaling is as shown in the following figure.
e.g. To display 2 – 8 kΩ input with total resistance 10 kΩ as 0.000 – 100.000%
■
PROCEDURE TO SET SCALING VALUES
• Flow in setting scaling values
5-step settings are necessary to set scaling values.
To set the input scaling values Zero and Span, actual input signals are used. It is necessary to set a potentiometer of the
equipment or device on site to 0% and 100%. You can set the display scaling values Zero and Span, and the decimal point
position first, and then set the input scaling values Zero and Span after operating the equipment or device on site.
• Operating procedure to set scaling values
Following pages describe operating procedures in each step to set the input scaling to 2 – 8 kΩ, and the display scaling to
0.000 – 100.000% as an example.
10 kΩ
Input scaling value Span
8 kΩ
Display scaling value Span
100.000%
0 kΩ
Input scaling value Zero
2 kΩ
Display scaling value Zero
0.000%
Total resistance (10 kΩ)
Input scaling
Display scaling
STEP 5
STEP 4
STEP 3
STEP 2
STEP 1
Setting input
scaling value
Zero
Setting
display
scaling
value Zero
Setting
input
scaling
value Span
Setting
display
scaling
value Span
Setting
decimal
point
position