Instructions
1.General Safety Requirements 
1 
1. General Safety Requirements  
Before use, please read the following safety precautions to avoid any possible bodily 
injury and to prevent this product or any other connected products from damage. In 
order to avoid any contingent danger, ensure this product is only used within the 
range specified.  
Only the qualified technicians can implement the maintenance.  
To avoid Fire or Personal Injury: 
  Connect the probe correctly. The grounding end of the probe corresponds to the 
grounding phase. Please don't connect the grounding end to the positive phase.  
  Use  Proper  Power  Cord. Use only the power cord supplied with the product and 
certified to use in your country. 
  Connect or Disconnect Correctly. When the probe or test  lead  is connected to a 
voltage source, please do not connect and disconnect the probe or test lead at random.   
  Product Grounded. This instrument is grounded through the power cord grounding 
conductor. To avoid electric shock, the grounding conductor must be grounded. The 
product  must be  grounded  properly  before any connection with its input or output 
terminal.  
When powered by AC power, it is not allowed to measure AC power source 
directly, because the testing ground and power cord ground conductor are 
connected together, otherwise, it will cause short circuit. 
When powered by battery, the product must ground connection. To avoid electric 
shock, there must be a ground wire connect between ground and the ground port 
(on the back of product panel). 
  Check  all Terminal Ratings. To avoid fire or shock hazard, check  all  ratings and 
markers of this product. Refer to the user's manual for more information about ratings 
before connecting to the instrument. 
  Do not operate without covers. Do not operate the instrument with covers or panels 
removed. 
  Use Proper Fuse. Use only the specified type and rating fuse for this instrument. 
  Avoid exposed circuit.  Do not touch exposed junctions and components when the 
instrument is powered. 
  Do not operate if in any doubt. If you suspect damage occurs to the instrument, have 
it inspected by qualified service personnel before further operations. 
  Use your Oscilloscope in a well-ventilated area. Make sure the instrument installed 
with proper ventilation, refer to the user manual for more details. 
  Do not operate in wet conditions. 
  Do not operate in an explosive atmosphere. 
  Keep product surfaces clean and dry.  










