MR8740、MR8741_user_manual_eng_20191016H.pdf - 第385页

18.1 Trouble Shooting 373 Chapter 18 Maintenance and Service 14 18 If the cause is unknown Perform a system reset. All settings are returned to their factory defaults. See: "18.2 Initializing the Instrument" (p…

18.1 Trouble Shooting

372

18.1 Trouble Shooting

If damage is suspected, check the "Troubleshooting" section before

contacting your dealer or Hioki representative.

If Power and Operating Mouse Malfunction

Symptom Check Item, or Cause Remedy and Reference

The display does not

appear when you turn the

power on.

Is the power cord disconnected?

Are connections made correctly?

Verify that the power cord is connected

properly.

"2.4 Supplying Power" (p.55)

Cannot operate the instru-

ment with a mouse.

• Is the USB mouse connected?

• Are you using a hub or special

mouse?

• Is there a source of interference

nearby?

• Check the USB connector.

• If you are using a hub, connect the

mouse directly to the instrument.

Use an ordinary mouse.

• Move the mouse away from the source

of interference.

If the Display or Operations Malfunction

Symptom Check Item, or Cause Remedy and Reference

Data is not displayed on

an external LCD monitor.

• Is it connected properly?

• Is it a digital LCD monitor?

• Are you using a VGA-DVI adapter

cable?

• Check the connections and power of the

instrument and LCD monitor.

• An analog monitor (VGA output) cannot

be used. Use an LCD monitor with a DVI-

D (digital output) connector.

The monitor flickers.

• Is there a source of interference

nearby?

• Are you using a special LCD moni-

tor? (Although extremely uncom-

mon, flickering may be caused by

incompatibility with the LCD monitor.)

• Move the cable away from the source of

interference.

• Use an ordinary LCD monitor.

A waveform does not

appear when measure-

ment is started

• Is the “Pre-Trigger wait” message

displayed?

• Is the "Trigger wait" message dis-

played?

When pre-triggering is enabled, triggering is

ignored until the pre-trigger portion of the

waveform has been acquired. Recording

starts when a trigger occurs.

No changes occur in the

displayed waveform.

• Is the clamp sensor or connection

cable connected correctly?

• Is the vertical axis (voltage axis)

range set properly?

• Is the low-pass filter enabled?

Verify that the clamp sensor or connection

cable is connected correctly.

Verify the input channel settings.

While measuring with the

memory function, the dis-

played frequency is much

lower than the actual fre-

quency.

Aliasing may be occurring.

Change the timebase to use a faster sam-

pling rate.

"3.4.2 Time Axis Range and Sampling

Rate" (p.67)

18.1 Trouble Shooting

373

Chapter 18 Maintenance and Service

If the cause is unknown

Perform a system reset. All settings are returned to their factory defaults.

See: "18.2 Initializing the Instrument" (p.374)

The displayed waveform

size does not change

when the input range is

changed.

Is the Variable function enabled?

Turn the Variable function off.

"7.5 Variable Function (Setting the

Waveform Display Freely)" (p.155)

If the Display or Operations Malfunction

Symptom Check Item, or Cause Remedy and Reference

If Saving is Not Possible

Symptom Check Item, or Cause Remedy and Reference

If saving is not possible to

the USB memory stick

• Is the storage media inserted properly?

• Is the storage media formatted?

• Is the remaining capacity of the storage

media too low?

• Has the number of files in the folder

reached the limit?

"2.3 Recording Media Preparation"

(p.53)

"Media information" (p.84)

Others

Symptom Check Item, or Cause Remedy and Reference

The response of remote

control is very slow.

Check the java settings.

About the java settings, see the applica-

tion disk supplied with the instrument.

18.2 Initializing the Instrument

374

Select groups of settings currently in force on the instrument, and initialize the settings. Initialization returns

the instrument to the factory default state. By default, the setting of [Setting (Stat, Ch, Trig)] and [Setting

(Env)] are selected for initialization in this screen.

Discard the waveform data saved in memory and initialize the data.

18.2 Initializing the Instrument

18.2.1 Initializing System Settings (System Reset)

Procedure

To open the screen: Right-click and select [SYSTEM] [Init] sheet

Move the flashing cursor to the item you want to initialize.

Select [On].

Select [Off] for the groups of settings that you do not want to initial-

ize.

Move the flashing cursor to the [System Reset].

Select [Exec].

A confirmation dialog box appears.

Select [Yes].

To cancel initializing:

Select [No].

Initialization is complete when "System initialized" appears.

(Status, Ch, Trig-

ger)

Current settings in Status screen, Channel screen,

and Trigger setting window (Default setting: On)

(Environment)

Current settings in the Environment sheet and File

Save sheet (Default setting: On)

(Interface)

Current settings in the Interface sheet (Default setting:

Off)

18.2.2 Initializing Waveform Data

Procedure

To open the screen: Right-click and select [SYSTEM] [Init] sheet

Move the flashing cursor to the [Clear Wave Data].

Select [Exec].

Initialization is complete when "Waveform data erased." appears.