background image

 

50% 

Quick centering (CH2) 

Full 

The multimeter is displayed in full screen 

Tg1/2 

Switch trigger source: Ch1 / CH2 

Note: 

CH1 cannot be turned off, CH2 can be turned on or off. When two channels are 

not required, CH2 should be turned off for higher sample rates and reduced power 
consumption. 

About trigger levels

The small arrow on the right side of the screen is yellow to indicate that the 

trigger source is CH1, and green indicates that the trigger source is CH2. 
The default trigger level is automatic adjustment, if you need to adjust it manually, 
you need to set the trigger level to "manual" in the menu, you can adjust the trigger 
level position arbitrarily (click the Shift key to move the trigger level up and down). 

Auto2

: RtAuto appears in the upper right corner of the screen, indicating real-time 

automatic adjustment. When the probe is connected, the oscilloscope automatically 
adjusts the range in real time. Press any key to exit. 

Shift+V(ch1)

: Turn on/off the voice assistant.

 

 

 

1  Safety Precautions 

 

High  voltage.  The  x10  range  of the  probe measures  up  to  220V.  An  x100 

probe is required for overreach.

 

 

Probe attenuation. Before measuring voltages greater than 40V, switch the 

probe to the X10 position. 

 

Charge.  The  charging  voltage  is  5V,  use  a  computer  or  mobile  phone 

charger. 

 

When  measuring  high-voltage  or  non-isolated  circuits,  it  cannot  be  used 

while charging (powered by a built-in battery). 

 

Do not use a multimeter while charging. 

 

Never insert the red probe into the current hole to measure the voltage, it 

will  blow  the  fuse  or  even  damage  the  machine.  After  measuring  the  current, 
remember to change the red probe to the voltage hole, remember!! 

 

When  the  multimeter  measurement  current  is  greater  than  6A,  the 

duration should not exceed 10 seconds to avoid line damage caused by heating. 

 

When measuring high voltages, do not use the oscilloscope and multimeter 

at the same time. 

 

Summary of Contents for DSO3D12

Page 1: ...DSO3D12 User s Manual Designed by ZEEWEII DIGITAL OSCILLOSCOPE...

Page 2: ...de is normal Trigger edge Rising edge trigger or falling edge trigger Battery level indication Trigger level position X1 X10 indicates probe attenuation which should be set to match the probe The goal...

Page 3: ...eform 50 Quick centering CH1 DMM Turn the multimeter on off Press Shift DMM to full screen Select Multimeter function selection mV V Adjust vertical sensitivity voltage of one grid s ns Adjust the tim...

Page 4: ...connected the oscilloscope automatically adjusts the range in real time Press any key to exit Shift V ch1 Turn on off the voice assistant 1 Safety Precautions High voltage The x10 range of the probe...

Page 5: ...anual adjustment mV V buttons scale the waveform vertically The s ns button scales the waveform horizontally The vertical sensitivity indicates the voltage of a grid in the vertical direction and it i...

Page 6: ...set the high priority of channel 2 pay attention to the change of the 1 2 icon in the upper left corner When not using dual channel measurements Channel 2 should be turned off for higher sample rates...

Page 7: ...s 3 4 1 Large input capacitance Because the probe 1X has a large input capacitance usually more than 100 pf it is not suitable for measuring some capacitively sensitive circuits For example when measu...

Page 8: ...f the signal by observing how many divisions the waveform occupies on the screen For example if the vertical sensitivity is 1v div and the signal occupies 3 grids on the screen you can know that the a...

Page 9: ...for adjusting the time base in the oscilloscope button panel are ns and s button When observing high frequency signals you should press the ns button to decrease the time base When observing low freq...

Page 10: ...The arrow circled above is the trigger level position and when the edge of the square wave in the above figure passes upwards through the position of this arrow a trigger is formed the waveform only...

Page 11: ...ancel a single trigger click Stop to stop Procedure 1 Connect the signal first 2 mV V set the voltage sensitivity s ns set the time base 3 Set the trigger level to manual and adjust the trigger level...

Page 12: ...exit can adjust the duty cycle other waveforms do not work When the set frequency is greater than 1MHz the square wave signal may show small horizontal jitter Single dual channel button to turn on off...

Page 13: ...e 1X 8 2 Measurement There are 14 measurement options available as shown below Frequency Peak to Peak Duty cycle Amplitude RMS Average Period Pulse width Pulse width Max Min Top Base Duty cycle The di...

Page 14: ...emain on the screen for a while and then disappear Optional persistence options are None 1s Infinite When Infinity is selected the waveforms that have appeared on the screen will remain forever and wi...

Page 15: ...Support Equivalent sample 500M Screenshot Support Rise time 3ns Frequency 0 01 Storage depth 64K Single Support Impedance 1M FFT Support Time base 5ns 10s Wave out amp 2 5V 0 05 Ver sensitivity 10mV...

Page 16: ...ice speech rate accent etc we cannot guarantee the accuracy of recognition Wake up command Hello ZEEWEII Pronounced Hello see wave or Hello mini scope Command words function Auto setting It is equival...

Page 17: ...w do I reset the device to its initial state Answer Open Menu Set and then long press the Auto button to reset 1 What is the difference between probe 1X and 10X Answer The 1X does not attenuate the si...

Page 18: ...cted to the audio output The time base is adjusted to about 1 10ms and the voltage sensitivity is adjusted to about 500mV decided according to the volume 6 How to measure main board communication sign...

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