User manual
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UNI-T
®
UT4000 User Manual 
5.  When the USB document is confirmed the following prompt will appear : “System 
upgrade is in progress. Please wait”. (This process may take 3 to 5 minutes) 
Figure 5-4 USB upgrade in progress 
6.  When upgrade is complete, a successful upgrade prompt will appear : “Upgrade is 
successfully complete. Please remove USB device, then power off your oscilloscope 
and power it back on again to complete the process.” The oscilloscope program is 
now updated and system upgrade is complete. In the event of upgrade failure, follow 
the steps below. 
Figure 5-5 USB upgrade success 










