MR8740、MR8741_user_manual_eng_20191016H.pdf - 第160页
7.4 Converting Input Values (Sca ling Function) 148 About the Scaling Function Use the scaling function to co nvert the measured voltage units output from a sensor to the physical units o f the parameter being measuremen…
7.3 Displaying New Waveforms Over Past Waveforms (Overlay)
147
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Chapter 7 Utility Functions
7
Description When the Overlay function is enabled ([Auto] or [Manual]).
• The Roll Mode function (p.145) and Overlay functions (p.146) cannot both be
enabled at the same time. When the Roll Mode is enabled, the Overlay func-
tion is automatically set [Off]. And when Overlay function is enabled, automat-
ically turns the Roll Mode [Auto].
• The following operations are not available on the Waveform screen.
Waveform scrolling, Zoom function On/Off, Changing horizontal axis (time
axis) magnification/compression, Changing zero position
• In the following cases, overlaid waveforms are cleared and only the most
recent waveform is displayed.
• When [Format] was changed on the [Status] sheet
• When the [Combo Area] setting has been changed ([Format] set to [X-Y
Single] or [X-Y Quad])
• Waveform display setting was changed on [Unit List] sheet or [Each Ch]
sheet (Display magnification, zero position, variable, display on/off, wave-
form color)
7.4 Converting Input Values (Scaling Function)
148
About the Scaling
Function
Use the scaling function to convert the measured voltage units output from a sensor
to the physical units of the parameter being measurement.
Hereafter, "scaling" refers to the process of numerical value conversion using
the Scaling function.
Gauge scales, scale values (upper and lower limits of the vertical axis (voltage
axis)) and A/B cursor measurement values can be displayed in scaled units.
Scaling is available for each channel.
Scaling Setting Example
See: When using a clamp sensor (p.150) (Example: Converting [ V ] [ A ])
When using the Strain Unit (p.151) (Example: Converting [
] [ G ])
Scaling Methods Two scaling methods are available:
• Conversion Ratio Setting
• Two-Point Setting
7.4 Converting Input Values (Scaling Function)
[A]
Before Scaling After Scaling
Set the physical value per volt (conversion ratio:
eu/V) of the input signal, an offset value and mea-
surement unit name (eu: engineering units) for
conversion, so measurement values acquired as
voltage are converted to the specified units.
Example:
Conversion ratio: A value per volt, Offset value:
B, Unit name: A
Conversion Ratio Setting
[A]
[V]
Convert from slope (conversion ra-
tio) and offset value
B
(:Example: Converting [V] [A])
Set the voltage values of two points of the input
signal, the converted unit value of these two
points and the name of the converted measure-
ment units, so measurement values acquired as
voltage are converted to the specified units.
Example:
Unit name: A
Voltage value at
2 points
Voltage of units to
convert
V
H
: Higher poten-
tial point
A
H
: Value for higher
potential point
V
L
: Lower poten-
tial point
A
L
: Value for lower
potential point
Two-Point Setting
A
H
A
L
V
L
V
H
[A]
[V]
Conversion ratio and offset value are
calculated from the two points and
converted
Actual measurement values
Converted unit values
7.4 Converting Input Values (Scaling Function)
149
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Chapter 7 Utility Functions
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2
3
4
1
2
4
3
4
Procedure
To open the screen: Right-click and select [CHAN] [Each Ch] sheet
1
Enable the Scaling function.
Select
Move the flashing cursor to the [Disp] item.
2
Select the scaling conversion method.
Select
Move the flashing cursor to the [Method] item.
3
Specify the physical units.
Move the flashing cursor to the [Unit], and enter
the physical unit name. (Up to 7 characters)
See: "Entering Text" (p.141)
4
Enter the numerical values for conversion.
When you have selected [Ratio] (set conver-
sion ratio and offset)
Move the flashing cursor to the [Ratio] and [Off-
set] items.
Enter numerical values in each field.
When you have selected [2-Point] (set input val-
ues for two points and the values after conver-
sion)
Move the flashing cursor to the [Input P1], [Scale
P1], [Input P2], and [Scale P2].
Enter numerical values in each field.
Off No scaling.
NUM
Displayed as a decimal and includes a unit (m,
k, etc.).
SCI
Displayed as an exponent (the power of ten)
Ratio Specify by conversion ratio.
Point
Specify by two points.
-9.9999E+9 to 9.9999E+9
-9.9999E+9 to 9.9999E+9
Input example:
Decimal1.2345 mV
Exponent1.2345E-03V
Display selecting [Ratio] for [Method] item
Display selecting [Point] for [Method] item
• When saving text or results of numerical calculation, some characters and
symbols used for display on the instrument will be converted as follows.
(MR8740/MR8741 display saved string)
•
2
^2,
3
^3, ~u, ~o, ~e, °~c ,
±~+, (display only)uE, °C (display only)C
To enter the current input value as is for P1 or P2
Select [Monitor Val].