VOLTCRAFT DSO-111 User manual

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DSO-111 Oscilloscope
Quick Guide

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Table of Contents
1. General Safety Requirements.................................................................................. 1
2. Safety Terms and Symbols....................................................................................... 2
3. User Guidebook........................................................................................................... 4
Structure of the Oscilloscope................................................................................................ 4
Front Panel...............................................................................................................................................4
Rear Panel............................................................................................................................................... 6
General Inspection.................................................................................................................... 7
Basic Operation......................................................................................................................... 7
Probe Compensation................................................................................................................8
Set the Probe Attenuation Coefficient................................................................................. 9
Use the Probe Safely................................................................................................................ 9
X-Y Mode....................................................................................................................................10
4. Troubleshooting........................................................................................................ 12
5. Appendix...................................................................................................................... 13
Appendix A: Enclosure..........................................................................................................13
Appendix B: General Care and Cleaning.......................................................................... 13

1.General Safety Requirements
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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. 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.
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.

2.Safety Terms and Symbols
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2. Safety Terms and Symbols
Safety Terms
Terms in this manual. The following terms may appear in this manual:
Warning: Warning indicates the conditions or practices that could result
in injury or loss of life.
Caution: Caution indicates the conditions or practices that could result in
damage to this product or other property.
Terms on the product. The following terms may appear on this product:
Danger: It indicates an injury or hazard may immediately happen.
Warning: It indicates an injury or hazard may be accessible potentially.
Caution: It indicates a potential damage to the instrument or other property might
occur.
Safety Symbols
Symbols on the product. The following symbol may appear on the product:
Hazardous Voltage
Refer to Manual
Protective Earth Terminal
Chassis Ground
Test Ground

2.Safety Terms and Symbols
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To avoid body damage and prevent product and connected equipment damage,
carefully read the following safety information before using the test tool. This
product can only be used in the specified applications.
Warning:
In X-Y mode, the X Input and Y Input of the oscilloscope are not electrically
isolated. The channels should adopt a common ground during measuring.
To prevent short circuits, the 2 probe grounds must not be connected to 2
different non-isolated DC levels.
The diagram of the oscilloscope ground wire connection:
Warning:
To avoid fire or electrical shock, when the oscilloscope input
signal connected is more than 42V peak (30Vrms) or on circuits of
more than 4800VA, please take note of below items:
Only use accessory insulated voltage probes and test lead.
Check the accessories such as probe before use and
replace it if there are any damages.
Remove probes, test leads and other accessories
immediately after use.
Do not apply input voltages above the rating of the
instrument because the probe tip voltage will directly
transmit to the oscilloscope. Use with caution when the
probe is set as 1:1.
Do not use exposed metal BNC or banana plug connectors.
Do not insert metal objects into connectors.