VOLTCRAFT DSO-2072H User manual

DSO-2072H
Handheld Oscilloscope
Quick Guide

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Table of Contents
1. Safety Information···································································1
2. How to Implement the General Inspection ··································4
3. How to Use the Oscilloscope····················································5
Power the Oscilloscope ······················································································5
The Structure of the Oscilloscope ·········································································5
Front Panel and Keys·························································································5
Side Panel·······································································································8
Introduction to the User Interface of the Oscilloscope ················································9
Functional Check ····························································································10
Probe Compensation ······················································································· 11
Probe Attenuation Coefficient Setting··································································· 12
Safe Use of Probe··························································································· 13
4. How to Use the Multimeter ····················································· 14
About This Chapter·························································································· 14
Instrument Interface·························································································14
5. How to Use the Waveform Generator (optional)························· 16
Connect the output ···························································································16
Set the waveform······························································································16
6. Troubleshooting···································································· 17
7. Appendix ············································································· 18
Appendix A: List of Accessories··········································································18
Appendix B: Maintenance and Cleaning ·······························································18
Appendix C: Fuse Replacement ········································································· 21

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1. Safety Information
(Before using this product, please read the safety information in advance)
Safety Terms
Terms in this manual (The following terms may appear in this manual):
Warning: Warning indicates 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: Indicates an immediate hazard or injury possibility.
Warning: Indicates a possible hazard or injury.
Caution: Indicates potential damage to the instrument or other property.
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
Safety Requirements
Please read the following safety precautions to avoid personal injury and
prevent damage to this product or any other products connected to it. To avoid
possible hazards, this product can only be used within the specified range.
Warning:

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To prevent electric shock or fire, use a suitable power adapter. Refer to section
"General Technical Specifications" for further information relating to the power
supply.
Warning:
The two channels of the oscilloscope are non-isolated channels. Note that the
channel should use a common reference when measuring, and the ground
wires of the two probes cannot be connected to two non-isolated places with
different DC electrical levels, otherwise it may cause a short circuit due to the
ground wire connection of the oscilloscope probe.
Warning:
Note that the channel should use a common reference when measuring,
otherwise it may cause a short circuit due to the ground wire connection of the
oscilloscope probe.
Schematic diagram of the internal ground wire connection of the oscilloscope:
Ground Clip
Signal Input
Oscilloscope AC Adapter Electrical OutletProbe
USB Cable
When the oscilloscope is AC powered by adapter or connected with AC
powered computer through the port, it is not allowed to measure the primary
power supply of power grid.
Warning:
If the input port of the oscilloscope is connected to a voltage with a peak value
higher than 42V (30vrms) or a circuit with a peak value of more than 4800 VA,
the following measures shall be taken to avoid electric shock or fire:

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⚫Only voltage probes and test wires with proper insulation attached to the
oscilloscope or accessories suitable for oscilloscope instrument products
specified by our company shall be used.
⚫Before use, check the multimeter test probe, oscilloscope probe and
accessories for mechanical damage. If damage available, replace it.
⚫Remove all unused multimeter test probes, oscilloscope probes and
accessories (power adapter, USB, etc.).
⚫Firstly, plug the power adapter into the AC socket, and then connect it to
the oscilloscope.
⚫When testing in a CAT II environment, do not connect a voltage higher
than 400 V to any input port.
⚫When testing in a CAT II environment, do not connect a voltage with a
voltage difference of more than 400 V to the isolated input port.
⚫Do not use an input voltage higher than the rated value of the instrument.
Pay special attention when using 1:1 test wires, because the probe voltage
will be directly transmitted to the oscilloscope.
⚫Do not touch the bare metal BNC or banana plug.
⚫Do not insert metal objects into the connector.
⚫Use the oscilloscope only in the specified way.
⚫The voltage rating mentioned in the "warning" information is the limited
value of "working voltage". They represent V ac rms (50-60 Hz) in AC sine
wave applications; and V dc in DC applications. CAT is the prefix, and II
refers to the level. Level II is the low voltage and high energy level, which
refers to the local electrical level applicable to electrical appliances and
portable equipment.
◼Only a qualified person should perform internal maintenance.
◼Check all Terminal Ratings. To avoid fire or shock hazard, check all
ratings and markings on this product. Refer to the user 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.

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◼Avoid exposed circuit. Be careful when working on exposed circuitry to
avoid risk of electric shock or other injury.
◼Do not operate if any damage. If you suspect damage to the instrument,
have it inspected by qualified service personnel before further use.
◼Do not operate in damp conditions.
◼Do not operate in an explosive atmosphere.
◼Keep product surfaces clean and dry.
◼Using the equipment not in accordance with the method specified
by the manufacturer may damage the protection provided by the
equipment.
2. How to Implement the General Inspection
After you get a new oscilloscope, it is recommended that you should
make a check on the instrument according to the following steps:
1. Check whether there is any damage caused by transportation.
If it is found that the packaging carton or the foamed plastic protection
cushion has suffered serious damage, do not throw it away first till the
complete device and its accessories succeed in the electrical and
mechanical property tests.
2. Check the Accessories
The supplied accessories have been already described in the "Appendix A:
List of Accessories" of this Manual. You can check whether there is any
loss of accessories with reference to this description. If it is found that
there is any accessory lost or damaged, please get in touch with our
distributor responsible for this service or our local offices.
3. Check the Complete Instrument
If it is found that there is damage to the appearance of the instrument, or the
instrument can not work normally, or fails in the performance test, please get in
touch with our distributor responsible for this business or our local offices. If
there is damage to the instrument caused by the transportation, please keep
the package. With the transportation department or our distributor responsible
for this business informed about it, a repairing or replacement of the instrument
will be arranged by us.

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3. How to Use the Oscilloscope
Power the Oscilloscope
The device can be powered three ways:
1) Input: USB-Cᵀᴹ (5 V/DC, 2 A)
2) Rechargeable batteries
3) Input: USB-Cᵀᴹ (5 V/DC, 2 A) + internal rechargeable batteries inserted
Note: Use the supplied USB-Cᵀᴹ to USB- A cable. Any replacement
cable should be of the correct type and specification. Refer to
section "General Technical Specifications" for further
information.
The Structure of the Oscilloscope
Front Panel and Keys
The front panel and keys of the oscilloscope are shown in Figure 3-1:

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4
11
6
7
9
10
16
15
14
13
12
517
3
8
1
2
Figure 3-1: Front Panel of the Oscilloscope
Description:
1. CH1 and CH2 input connectors.
2. Waveform generator output connector (optional).
3. Display area.
4. The F1 - F4 keys are multi-function keys. In each menu mode, press the
corresponding key to select the corresponding menu item.
5. After pressing the HOR key, through the key , you can change the
horizontal time base setting, and observe the change of the state
information caused by it; it can also be found that the horizontal time
base display corresponding to the status bar has changed correspondingly;
the horizontal displacement of the signal in the waveform window can be
adjusted by pressing .
6. Return key. Press this key to return to the previous menu; when the menu

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is the first level, press the return key to close the menu.
7. Measurement menu key (oscilloscope) or range key (multimeter).
8. Zoom or move key:
Function of direction keys : used for the up and down movements of
waveform, the time base changing, the voltage cursor movements and the
trigger of electrical level change in the oscilloscope;
Function of direction keys : used for the left and right movements of
waveform, the voltage position changing and the movements of time
cursor in the oscilloscope.
9. Automatic setting key (oscilloscope) or automatic range key (multimeter).
10. Stop / run key (oscilloscope) or value hold key (multimeter) or turn on/off
the signal output (waveform generator - optional).
11. Input end of the multimeter.
12. Trigger menu key (oscilloscope) or relative value key (multimeter).
13. : Power switch key.
14. Enter the save settings key.
15. Enter the system settings key.
16. Switch key for working state of oscilloscope and multimeter.
17. CH1 / CH2 - channel switch key.

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Side Panel
1
2
3
Description:
1. Probe compensation: 3.3V/1kHz square wave signal output
2. Charging or USB communication interface
3. Bracket