User manual
2638A 
Users Manual 
7-18 
Table 7-2. Troubleshooting Chart (cont.) 
Problem  Causes and Solutions 
Cannot read USB drive.  Cause 1: USB drive not installed properly.   
Solution 1: Make sure the USB drive is fully inserted. The LED light will 
illuminate in less than 30 seconds. 
Cause 2: USB driver locked by application (LED lights always illuminated even 
if USB drive is not installed.)   
Solution 2: Cycle the power with the main power switch and insert the USB 
drive again. 
Cause 3: USB drive not recognized. 
Solution 3: Replace the USB drive. 
Cause 4: USB drive inoperative or damaged. 
Solution 4: Replace USB drive. 
Product does not start 
to scan after the scan is 
started. 
Cause 1: The Product is waiting to be triggered. 
Solution 1: Check the trigger type in the test setup and make sure the trigger is 
properly configured. 
Product does not record 
when I start a scan. 
Cause 1: The Auto Recording feature is not turned on. 
Solution: Manually push record to start recording or turn on Auto Recording in 
the test setup. 
The Product starts with 
default settings. 
Cause: The SRAM battery is dead.   
Solution: Contact Fluke Calibration. See Chapter 1.  
Product is out of 
memory. 
Cause: The internal memory or USB drive is out of space.   
Solution: Delete or transfer some files to free up memory. 










