Fluke 190-104/EU/S 4-channel hand-held oscilloscope, ScopeMeter® 190 series II, hand-held 3894617 사용자 설명서

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107 

• 

The batteries may be empty. Check the battery 
symbol at the top right of the screen. A

symbol 

indicates that the batteries are empty and must be 
charged. Connect the BC190 power adapter. 

• 

The test tool is still on but the ‘display auto off’ timer is 
active, see Chapter 6 ‘Setting the Display AUTO-off 
Timer’. To turn the display on press any key (restarts 
the ‘display AUTO-off’ timer), or connect the BC190 
power adapter. 

• 

The power down timer is active, see Chapter 6 
‘Setting the Power Down timer’.  
Press 

 to turn the test tool on. 

• 

Make sure that the test tool is on (press 

) 

• 

You might have a problem with the screen contrast. 
Press 

, then press 

 . Now you can use 

the arrow keys to adjust the contrast. 

• 

The display ‘auto off’ timer is active, see Chapter 6 
‘Setting the Display AUTO-off Timer’. To turn the 
display on press any key (restarts the ‘display AUTO -
off’ timer), or connect the BC190 power adapter. 

If the test tool cannot be turned off due to a software 
hangup, do the following: 

• 

Keep the ON/OFF key pressed for at least 5 seconds. 

• 

Make sure that the test tool is turned on. 

• 

Make sure that the interface cable is properly 
connected between the test tool and the PC. Use only 
the test tool mini USB port for communication with a 
computer! 

• 

Make sure that no SAVE/RECAL/COPY/MOVE action  
from or to a USB-stick is being performed.   

• 

Make sure that the USB driver has been correctly 
installed, see Appendix A.