VOLTCRAFT DSO-2154 User manual

DSO-2154 Oscilloscope
Quick Guide

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Table of Contents
1. General Safety Requirements.......................................................................................... 1
2. Safety Terms and Symbols................................................................................................2
3. Quick Start........................................................................................................................4
Introduction to the Structure of the Oscilloscope............................................................ 4
Front Panel..............................................................................................................................................4
Rear Panel...............................................................................................................................................5
Control Area........................................................................................................................................... 6
User Interface Introduction..................................................................................................... 7
How to Implement the General Inspection..........................................................................9
How to Implement the Function Inspection........................................................................9
How to Implement the Probe Compensation................................................................... 10
How to Set the Probe Attenuation Coefficient.................................................................11
How to Use the Probe Safely................................................................................................ 12
How to Implement Self-calibration......................................................................................13
Introduction to the Vertical System.................................................................................... 13
Introduction to the Horizontal System...............................................................................14
Introduction to the Trigger System.....................................................................................15
How to Measure Automatically.................................................................................................16
4. Communication with PC................................................................................................ 17
5. Appendix......................................................................................................................... 18
Appendix A: Enclosure.............................................................................................................. 18
Appendix B: General Care and Cleaning.................................................................................18

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.
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
2
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:
The four channels 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:
It is not allowed to measure AC power when the AC powered oscilloscope is
connected to the AC-powered PC through the ports.
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.
Remove USB cable which connects oscilloscope and
computer.
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.

3.Quick Start
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3. Quick Start
Introduction to the Structure of the Oscilloscope
This chapter makes a simple description of the operation and function of the front
panel of the oscilloscope, enabling you to be familiar with the use of the
oscilloscope in the shortest time.
Front Panel
The front panel has knobs and function buttons. The 5 buttons in the column on
the right side of the display screen are menu selection buttons, through which, you
can set the different options for the current menu. The other buttons are function
buttons, through which, you can enter different function menus or obtain a specific
function application directly.
Figure 3- 1 Front panel
1. Display area
2. Menu selection buttons: Select the right menu item.
3. Control (button and knob) area
4. Probe Compensation: Measurement signal (5V/1kHz) output.
5. Signal Input Channel
6. USB Host port: It is used to transfer data when external USB equipment
connects to the oscilloscope regarded as "host device". For example: Saving
the waveform to USB flash disk needs to use this port.
7. Power on/off

3.Quick Start
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Rear Panel
Figure 3- 2 Rear Panel
1. Handle
2. Air vents
3. AC power input jack
4. Foot stool: Adjust the tilt angle of the oscilloscope.
5. USB Device port: It is used to transfer data when external USB equipment
connects to the oscilloscope regarded as "slave device". For example: to use
this port when connect PC to the oscilloscope by USB.

3.Quick Start
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Control Area
Figure 3- 3 Control Area Overview
1. Function button area: Total 6 buttons.
2. Horizontal control area with 1 button and 2 knobs.
"HOR" button refer to horizontal system setting menu, "Horizontal Position"
knob control trigger position, " Horizontal Scale" control time base.
3. Trigger control area with 2 buttons and 1 knob.
The Trigger Level knob is to adjust trigger voltage. Other 2 buttons refer to
trigger system setting.
4. Copy button: This button is the shortcut for Save function in the Utility function
menu. Pressing this button is equal to the Save option in the Save menu. The
waveform, configure or the display screen could be saved according to the
chosen type in the Save menu.
5. Vertical control area with 5 buttons and 2 knobs.
CH1 -CH4 buttons correspond to setting menu in CH1 - CH4. "Math" button
provides access to math waveform functions (+, -, ×, /, FFT). The "Vertical
Position" knob control the vertical position of current channel, and the

3.Quick Start
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"Vertical Scale" knob control voltage scale of current channel.
6. Mknob(Multipurpose knob): when a symbol appears in the menu, it
indicates you can turn the Mknob to select the menu or set the value. You can
push it to close the menu on the left and right.
User Interface Introduction
Figure 3- 4 Illustrative Drawing of Display Interfaces
1. Waveform Display Area.
2. Run/Stop
3. The state of trigger, including:
Auto: Automatic mode and acquire waveform without triggering.
Trig: Trigger detected and acquire waveform.
Ready: Pre-triggered data captured and ready for a trigger.
Scan: Capture and display the waveform continuously.
Stop: Data acquisition stopped.
4. The two blue dotted lines indicates the vertical position of cursor
measurement.
5. The T pointer indicates the horizontal position for the trigger.
6. The pointer indicates the trigger position in the record length.
7. It shows present triggering value and displays the site of present window in
internal memory.
8. It indicates that there is a USB disk connecting with the oscilloscope.
9. Channel identifier of current menu.

3.Quick Start
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10. The waveform of CH1.
11. Right Menu.
12. The waveform of CH4
13. The waveform of CH3
14. The waveform of CH2.
15. Current trigger type:
Rising edge triggering
Falling edge triggering
Video line synchronous triggering
Video field synchronous triggering
The reading shows the trigger level value of the corresponding channel.
16. It indicates the measured type and value of the corresponding channel. "T"
means period, "F" means frequency, "V" means the average value, "Vp"
the peak-peak value, "Vr" the root-mean-square value, "Ma" the maximum
amplitude value, "Mi" the minimum amplitude value, "Vt" the Voltage value
of the waveform's flat top value, "Vb" the Voltage value of the waveform's
flat base, "Va" the amplitude value, "Os" the overshoot value, "Ps" the
Preshoot value, "RT" the rise time value, "FT" the fall time value, "PW" the
+width value, "NW" the -Width value, "+D" the +Duty value, "-D" the -Duty
value, "FRR" the FRR, "FRF" the FRF, "FFR" the FFR, "FFF" the FFF,
"LRR" the, "LRF" the LRF, "LFR" the LFR, "LFF" the LFF,"PD" the Delay
A->B value, "ND" the Delay A->B value, "TR" the Cycle RMS, "CR"
the Cursor RMS, "WP" the Screen Duty, "RP" the Phase, "+PC" the +Pulse
count, "-PC" the - Pulse count, "+E" the Rise edge count, "-E" the Fall
edge count, "AR" the Area, "CA" the Cycle area.
17. The readings show the record length.
18. The frequency of the trigger signal.
19. The readings show current sample rate.
20. The readings indicate the corresponding Voltage Division and the Zero
Point positions of the channels. "BW" indicates bandwidth limit.
The icon shows the coupling mode of the channel.
"—" indicates direct current coupling
"～" indicates AC coupling
"" indicates GND coupling
21. The reading shows the setting of main time base.
22. It is cursor measure window, showing the absolute values and the
readings of the cursors.
23. The blue pointer shows the grounding datum point (zero point position) of
the waveform of the CH2 channel. If the pointer is not displayed, it means
that this channel is not opened.
24. The orange pointer shows the grounding datum point (zero point position)