MR8740、MR8741_user_manual_eng_20191016H.pdf - 第88页

3.5 Input Channel Setting 76 Set the analog cha nnel. For information about specific settings for e ach module, see "7.9"(p.161). 1. W aveform Display Color Specifies the color in which the waveform of the s el…

3.5 Input Channel Setting

Chapter 3 Measurement Procedure

The setting workflow for logic channels (standard LOGIC terminals LA - LB (MR8740), LA -LD

(MR8741), expansion LOGIC terminals L1A - L8D) is explained below.

• When input coupling is set to GND, the waveform will have no amplitude and

range setting is not possible.

• Due to the influence of filter attenuation, correct range setting may sometimes

not be possible.

• When making trigger settings, set the vertical axis (voltage axis) range first. If

the range is changed after specifying the trigger, the trigger setting may

change.

• When using the Variable function, set the vertical axis (voltage axis) range first.

If the range is changed after specifying the Variable setting, observation with

sufficient precision may not be possible.

• When using the Variable and Scaling functions together, make the Scaling set-

tings first. If Scaling settings are made after selecting the Variable function, the

intended display result may not be achieved.

1 Make screen display related settings

Setting logic recording width

See:

"1. Logic Width" (p.79)

2 Make display color and display position settings

Set waveform display position

Set waveform display color

See:

"2. Waveform Display Position" (p.79)

"3. Waveform Display Color" (p.79)

• Waveform display position can be specified in 1% increments.

• Not displayed for X-Y1 and X-Y4 screens.

• With MR8740, install the logic units on unit 1 to unit 8. Any logic units installed

on units 9 and after will be invalid.

3.5 Input Channel Setting

Set the analog channel.

For information about specific settings for each module, see "7.9"(p.161).

1. Waveform

Display Color

Specifies the color in which the waveform of the selected channel is displayed.

You can also select the same color as another channel.

Select

2. Vertical axis

(Voltage axis)

Range

Sets the vertical axis (voltage axis) range for each channel. The value set here is

the voltage of one increment on the vertical axis.

For information on the full-scale value for the respective modules, see the table

in the section "6. Zero Position" (p.77).

When the Variable function is on but Variable Auto Adjustment is off, the size of

the waveform on the screen will not change even if the vertical axis (voltage)

range is changed.

3. Coupling Set the input signal coupling method. Normally, DC coupling should be selected.

Select

3.5.2 Analog Channel

Procedure

To open the screen: Right-click and select [DISP] Waveform screen Right-click and select [CH.SET]

Channel settings window ([Analog] sheet)

1. 2. 3. 4. 5. 6. 7.

Move the flashing cursor to the channel for

which to make settings.

Select the settings by clicking the mouse.

To copy the settings of one channel to another

See: "7.8 Copying settings to other channels (calculation No.) (Copy function)" (p.160)

Off The waveform is not displayed. If the Auto Save setting for [Save Channel] is

[Disp Ch], data for the channel will also not be saved.

See: "Select the channel to save." (p.90)

The waveform is displayed. Set the display color by clicking [  ] or [  ].

All On-Off

Switches the waveform display of all channels to all ON or all OFF

An over-range condition has occurred

Change the vertical axis (voltage axis) range to a lower sensitivity set-

ting.

DC (V,– ) Both DC components and AC components of the input signal will be measured.

(default setting)

AC ( , ~)

Only AC components of the input signal will be measured. DC components are

blocked.

GND ( )

Input is shorted to ground. (Allows checking the zero position.)

3.5 Input Channel Setting

Chapter 3 Measurement Procedure

4. Vertical axis

(Voltage axis)

Zoom

Vertical axis (voltage axis) zoom-up or zoom-down settings can be made sepa-

rately for each channel. The settings will be used for display.

Zooming is carried out using the zero position as reference. The measurement

resolution does not change.

See: "6.5.3 Magnifying and Compressing Vertical Axis (Voltage Axis)" (p.131)

To achieve a user-specified zoom setting, the Variable function is used. By

reversing plus/minus, the waveform can be inverted.

See: "7.5 Variable Function (Setting the Waveform Display Freely)" (p.155)

"7.7 Inverting the Waveform (Invert Function)" (p.159)

5. Vernier Fine adjustment of input voltage can be performed arbitrarily on the Waveform

screen (display only). When recording physical values such as noise, temperature

and acceleration using sensors, amplitude can be adjusted to facilitate calibration.

See: "7.6 Fine Adjustment of Input Values (Vernier Function)" (p.158)

6. Zero Position Sets the 0 V level display position. If the 0 V input level has shifted, perform

zero-adjust.

See: "2.6 Adjusting the Zero Position (Zero-Adjust)" (p.58)

See: "2.7 Performing Calibration (When Mounting MR8990)" (p.59)

If the zero position of the 8969 and U8969 Strain Unit is out of alignment, perform

auto balance.

See: "7.9.4 Setting Model 8969 and U8969 Strain Unit" (p.165)

The zero position is as shown in the illustration below.

(Example: 8966 Analog Unit)

• Simply moving the display position will not apply an offset to the input.

• Zoom of the vertical axis direction (voltage axis) is based on the zero position.

• The voltage range displayed in the waveform screen changes with zero posi-

tion and zoom of the vertical axis (voltage axis) but the measurable range does

not change.

A/D Data

2047

-2047

A/D Data

0 V

2000 LSB

0 %

50 %

100 %

Display screen

(Zero position: 0%)

Display screen

(Zero position: 50%)

Display screen

(Zero position:100%)