VOLTCRAFT DSO-2202H + AFG User manual

Handheld Oscilloscope
Quick Guide
DSO-2072H
DSO-2202H + AFG

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Table of C onten ts
1 . S a fe ty In fo rm a tio n ........................................................................................................ 1
2. H o w to Im p lem en t th e G eneral Insp e ctio n .........................................................4
3. H o w to U se th e O s cillo sco pe ...................................................................................5
Power the Oscilloscope ..................................................................................................................... 5
The Structure of the Oscilloscope ....................................................................................................5
Front Panel and Keys ........................................................................................................................ 5
Side Panel ............................................................................................................................................7
Introduction to the User Interface of the Oscilloscope ..................................................................8
Functional Check ................................................................................................................................ 9
Probe Compensation ....................................................................................................................... 10
Probe Attenuation Coefficient Setting ............................................................................................11
Safe Use of Probe ............................................................................................................................ 12
4. H o w to U se th e M u ltim eter ......................................................................................13
About This Chapter ...........................................................................................................................13
Instrument Interface ......................................................................................................................... 13
5. H o w to U se the W a ve form G e nera to r (o ption al) ............................................1 5
C o nn ec t th e o u tp ut ............................................................................................................................ 15
S e t th e w a v e fo rm ................................................................................................................................ 15
6. Trou b les hooting .......................................................................................................... 16
7 . A p p e nd ix .........................................................................................................................1 7
Appendix A: List of Accessories ..................................................................................................... 17
Appendix B: Maintenance and Cleaning .......................................................................................17
Appendix C: Fuse Replacement .................................................................................................... 20

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1. S afe ty In fo rm atio n
(Before using this product, please read the safety information in advance)
S afe ty Term s
Term s in th is m an u a l (The following terms may appear in this manual):
W arning : Warning indicates conditions or practices that could result
in injury or loss of life.
C au tion: Caution indicates the conditions or practices that could
result in damage to this product or other property.
Term s on th e product. The following terms may appear on this product:
D an g er: Indicates an immediate hazard or injury possibility.
W arning : Indicates a possible hazard or injury.
C au tio n: Indicates potential damage to the instrument or other property.
S afe ty S ym b o ls
S ym b o ls o n th e p ro du c t. The following symbol may appear on the
product:
Hazardous Voltage
Refer to Manual
Protective Earth Terminal
Chassis Ground
Test Ground
S afe ty R equire m en ts
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:
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.
O nly a qualifie d perso n s hould perform internal m aintena nce .
C h eck all Te rm in al R atin g s. 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.
D o n ot o pe rate w ith ou t co vers. Do not operate the instrument with
covers or panels removed.

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Avo id expo s ed c irc u it. Be careful when working on exposed circuitry to
avoid risk of electric shock or other injury.
D o no t o p erate if an y da m ag e. If you suspect damage to the instrument,
have it inspected by qualified service personnel before further use.
D o n ot op era te in d am p co nd itio ns .
D o n ot op era te in a n ex plo sive a tm o sp he re.
K ee p p ro du ct s urfac es c le an an d d ry.
U s in g th e e q u ipm ent n o t in ac co rdan c e w ith th e m e th o d sp ecifie d
by the m anufacturer m ay dam age the protection p rovid ed b y the
eq u ip m ent.
2. H ow to Im plem en t th e G eneral In spectio n
After you get a new oscilloscope, it is recommended that you should
make a check on the instrument according to the following steps:
1. C h eck w h eth er th ere is a ny d am ag e cau sed b y tran sp ortatio n.
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 . C h e ck th e A c ce ss o rie s
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. C h eck the C o m p le te In strum e nt
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. H o w to U se the O scillosco pe
P o w er the O scillo sco pe
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
N o te : 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.
Th e S tru c tu re of th e O s cillo sc op e
Front Panel and Keys
The front panel and keys of the oscilloscope are shown in F igu re 3 - 1 :

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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 H O R 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 horizon tal tim e
bas e 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
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.

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

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In trod uc tion to th e U s er In terfa ce of the O s cillosco pe
Figure 3- 2: Oscilloscope Interface
Description:
1. The trigger status indicates the following information:
Auto: Automatic mode. The waveform is being collected without
triggering.
Trig: A trigger has been detected and post trigger information is
being collected.
Ready: All pre trigger data have been obtained and the
oscilloscope is ready.
Scan: Scan mode. Continuously collect and display waveform
data.
Stop: Stop collecting waveform data.
2. Run/stop.
3. Time base display.
4. The pointer indicates the trigger horizontal position.
5. The pointer indicates the trigger position within the current storage depth.
6. Indicating the value of the current trigger horizontal displacement, and
displaying the position of the current waveform window in the memory.
7. It indicates that there is a USB disk connecting.

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8. Battery power and external power supply indication.
9. Channel 1 waveform.
10. The pointer indicates the trigger electrical level position of the channel.
11. Channel 2 waveform.
12. The icon indicates trigger-related information, including trigger channel,
coupling mode, trigger type and trigger electrical level.
13. The current sampling rate.
14. The channel information reading indicates the voltage position of the
corresponding channel.
The icon indicates the coupling mode of the channel:
"—" means DC coupling
"～" means AC coupling
" " Means ground coupling
15. The pointer indicates the grounding reference point (zero position) of the
waveform displayed in CH2 channel. If there is no pointer indicating the
channel, it means that the channel is not open.
16. The pointer indicates the grounding reference point (zero position) of the
waveform displayed in CH1 channel. If there is no pointer indicating the
channel, it means that the channel is not open.
17. Waveform display area.
Fun ctio nal C heck
Making a quick functional check to verify that the instrument is working
properly. Please proceed as follows:
1 . P ress the sw itc h a t th e b o ttom le ft of th e m ain u nit .
The internal relay will make a slight click. The instrument executes all
self-check items, and the startup screen appears. Press the front panel key
S ystem , the default probe menu attenuation coefficient setting value is 10X.

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2. The sw itc h o n the oscilloscope p rob e is s et to 10X and co nn ected w ith
th e C H 1 ch an n el.
Align the slot on the probe with the plug on the bayonet nut connector (BNC) of
the CH1 connector and insert it, then turn the probe to the right and tighten it.
Connect the probe tip and ground clamp to the connector of the probe
compensator. Please pay attention to the terminal polarity. The square terminal
represents the signal output, and the round terminal represents the reference
ground.
3 . P res s th e "A u to " ke y o n th e fro nt p a n el.
Within a few seconds, a square wave display (1kHz/3.3Vpp) can be seen, as
shown in Fig ure 3- 3.
Figure 3- 3: Automatic Setting
Repeat steps 2 and 3 on the CH2 channel.
P ro b e C o m p e ns atio n
When connecting the probe to any input channel for the first time, make this
adjustment to match the probe with the input channel. The probe without
compensation or deviation compensation will lead to measurement error. To
adjust the probe compensation, please follow the following steps:
1. Set the probe menu attenuation coefficient to 1 0X , and set the switch on the
probe to 10X (see "Probe Attenuation Coefficient Setting"), and connect with
CH1. If a hook probe is used, make sure it is in close contact with the probe.
Connect the probe tip to the signal output connector of the probe compensator,

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and connect the reference wire clamp to the ground wire connector of the
probe compensator, and then press the A u to key on the front panel.
2. Check the displayed waveform and adjust the probe until the compensation
is correct. See F igure 3- 4 and Fig ure 3 - 5 .
O verco m p en s ation C o rrect co m p ensatio n U n d er-co m p ensation
Figure 3- 4: Display Waveform of Probe Compensation
3. Repeat the steps if necessary.
Figure 3- 5: Probe Adjustment
P ro b e A tte nu ation C o e ffic ien t S e ttin g
The probe has a variety of attenuation coefficients, which will affect the vertical
position factor of the oscilloscope.
To change (check) the set value of probe attenuation coefficient in the
oscilloscope menu, please follow the steps below:
(1) Press the CH1/CH2 key to switch the channel to be used.
(2) Press the F 3 to select the desired attenuation coefficient. This setting is
valid until it is changed again.

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N o te : The preset setting of the probe attenuation coefficient in the
menu when the oscilloscope is delivered is 10X. Make sure
that the attenuation switch setting value on the probe is the
same as the probe attenuation coefficient option in the
oscilloscope menu.
The setting value of the probe switch is 1 X and 10X . See Fig ure 3- 6.
Figure 3- 6: Probe Attenuation Switch
N o te : When the attenuation switch is set to 1X , the probe limits the
bandwidth of the oscilloscope to 5 M H z . To use the full
bandwidth of the oscilloscope, be sure to set the switch to
10X.
S a fe U s e o f P ro be
The safety ring surrounding the probe body provides a barrier to protect the
fingers from electric shocks. See F ig ure 3 - 7 .
Figure 3- 7: Finger Safety Ring of the Probe

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W arning : To prevent electric shock when using the probe, please keep
your fingers behind the safety ring on the probe body.
To prevent electric shock when using the probe, do not touch the
metal part of the probe head when the probe is connected to a
voltage source.
Before making any measurements, connect the probe to the
instrument and connect the ground terminal to the ground.
4. H ow to U se the M u ltim ete r
A b ou t Th is C h ap te r
This chapter introduces the multimeter function of the oscilloscope step by
step, and provides some basic examples of basic operations and how to use
the menu.
In strum ent Interface
The multimeter uses four 4-mm safety banana plug input ends: A , m A , C O M ,
an d .
Multimeter interface:
Multimeter Interface

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Description:
1. Measurement type indication:
DCV ------ DC voltage measurement
～AC V ------ AC voltage measurement
DCA ------ DC current measurement
～AC A ------ AC current measurement
R es ist ------ Resistance measurement
D io de ------ Diode measurement
C o nt ------ On/Off measurement
C ap ------ Capacitance measurement
2.Range indication: M an ual means manual range; A u to means automatic
range.
3. Current measurement range.
4. Indicating that there is a USB cable inserted.
5. Battery power indication.
6. “Hold” can keep the current reading on the display.
7. Measurement value and unit.
8. Display of switching resistance, buzzer, diode and capacitance
measurement function.
9. The selected range V or mV in voltage measurement; the selected current
range A or mA in current measurement.
10. To choose AC or DC current measurement.
11. To choose AC or DC voltage measurement.
12. Display of relative value measurement function (only available when
measuring DC current, DC voltage and resistance).

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5. H ow to U s e the W ave form G en erato r (optio nal)
The instrument can provide 4 basic waveforms, sine wave, square wave,
ramp wave, pulse wave, and 8 arbitrary waveforms.
C onnect th e output
Press the M o d e button to switch the instrument interface to the waveform
generator function interface. Check whether the upper left corner of the
screen is O N , if it is O F F , press the R u n /S top key to switch.
Connect the BNC cable to the port marked G E N O ut in the top of the
oscilloscope.
Generator Output Ports
To observe the output of the waveform generator, connect the other end of
the BNC cable to the signal input connector of the oscilloscope.
S et th e w avefo rm
(1) Press the M o de button to switch the instrument interface to the waveform
generator function interface.
(2) Press F1 to select the desired waveform, and the screen will display
the corresponding waveform setting menu.
(3) Set the parameters of the desired waveform through the operation panel
F2-F4 and the panel keys.

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6. Tro u b leshooting
1. T h e o scillo s co p e can n o t be tu rned o n.
It may be that the battery is completely exhausted. At this time, even if the
oscilloscope is powered by the power adapter, the oscilloscope cannot be
turned on. You need to charge the battery first, and do not turn on the
oscilloscope. Wait for about 15 minutes, and then try to turn on the
oscilloscope. If the oscilloscope still cannot be turned on, please contact us to
serve you.
2. T h e o scillo s co p e turn s off a fter a few seco n d s o f startup .
It may be that the battery is exhausted. Check the battery symbol at the top
left of the screen. symbol indicates that the battery is exhausted and must
be charged.
3. Afte r sw itc h ing to the m ultim eter, the m easure m en t typ e is d isplaye d
a s E .
It may be that the measurement type was not selected. At this time, press F 4 ,
the measurement type should display the corresponding measurement type.
If E is still displayed, restart the oscilloscope.
4. In the o scillo s co p e state, th e m easured vo lta g e am plitu de value is 1 0
tim es la rger o r sm a ller tha n the actual value.
Check whether the channel attenuation coefficient is consistent with the
actual probe error ratio.
5. In the oscillo scope sta te , th e re is a w aveform d isplay, but it cannot b e
stab ilized.
Check whether the source item in the trigger mode menu is consistent
with the signal channel actually used.
Check whether the trigger electrical level has exceeded the waveform
range. Only by setting the parameters reasonably, the waveform can be
displayed stably.
6. In the osc illoscope sta te , n o th in g is dis p laye d a fter press in g

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R U N /S TO P .
Check whether the trigger mode of the trigger mode menu is normal or single,
and the trigger electrical level is out of the waveform range. If so, center the
trigger electrical level or set the trigger mode to automatic. In addition, you
can press A u to to automatically complete the above settings.
7. In th e osc illoscope sta te , th e disp lay s p eed bec o m es s low er w hen the
ave rag e value sam p ling is set in the a cq u is itio n m ode o r the du ration is
set longer in th e dis p lay s ettin g s.
It is normal.
7. A p pe n dix
A p pen dix A : L is t o f A c cesso ries
Oscilloscope
USB-Cᵀᴹ to USB-A (data/charging) cable
Probe
Probe adjust
BNC to alligator clip cable
Carrying bag
Multimeter test leads (red & black)
CD-ROM (software + manual + safety sheet + quick guide)
Quick guide
Safety sheet
A ppen dix B : M ain tenan ce and C lean ing
G eneral m aintenan ce
Do not store or place the instrument in a place where the LCD screen will be
exposed to direct sunlight for a long time.
C au tio n: Do not let spray, liquid or solvent touch the instrument or probe to

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prevent damage to the instrument or probe.
C lea nin g:
Check the instrument and probe frequently according to the operation. Clean
the external surface of the instrument as follows:
1. Please wipe the floating dust outside the instrument and probe with a soft
cloth. When cleaning the LCD, be careful not to scratch the transparent LCD
protection screen.
2. Wipe the instrument with a damp but non-dripping soft cloth. Please
disconnect the power supply. It can be scrubbed with soft detergent or water.
Do not use any abrasive chemical cleaning agent to avoid damaging the
instrument or probe.
W arning : Please make sure the instrument is dry before re-energizing
to avoid electrical short circuit or personal injury caused by moisture.
B attery C h arg ing
During the long-term storage of the device, the battery may be too low due to
the self-discharge of the lithium battery and the device cannot be turned on.
This is a normal phenomenon.
Pre-charge the device for 0.5 to 1 hour (depending on the storage time)
before turning it on. In addition, if the device is not used for a long time, it is
recommended to charge it at regular intervals to avoid over-discharge of the
lithium battery.
The lithium battery may not be fully charged when delivered.
Model
Charging
Discharging
For models＜100MHz
≥4.5h
≥4h
For models≥100MHz
≥4h
≤3h
The power supply and battery indicator symbols in the upper right corner of
the screen are explained as follows: