Joy-it JT-DMSO2D72 User manual

JT-DMSO2D72
Portable 3-in-one oscilloscope, signal generator and multimeter
1. GENERAL INFORMATION
Dear customer,
Thank you for choosing our product. Please read the following im-
portant information before putting the device into operation.
This oscilloscope is compact, portable and flexible. It has a TFT-LCD
color display with a resolution of 320 x 240 pixels and adjustable
backlight brightness.
The maximum real time sampling rate can be up to 250 MSa/s. USB
memory devices are also supported, the user can upgrade the firm-
ware via USB, the edge trigger function is automatically detected and
it has a user-defined fast oset calibration with A/D converter that
can sample each channel simultaneously.
3

2. SAFETY INSTRUCTIONS
Safety Terms and Symbols:
following terms may appear on product:
Danger It represents that harms may be caused to you at once if you per-
form the operation.
WarningIt represents that latent harms may be caused to you if you per-
form the operation.
Notice It represents that damage may possibly caused to the product or
other properties if you perform the operation.
Symbols on the product: following symbols may appear on product:
General Safety Summary
Read the following safety precautions to avoid injury and prevent damage
to this product or any products connected to it. To evade potential haz-
ards, use this product only as specified.
Only qualified personnel should perform maintenance.
Use suitable power cord. Use only the power cord specified for this prod-
uct and certified for the country of use.
Connect and disconnect properly. Connect a probe with the oscilloscope
before it is connected to measured circuits; disconnect the probe from the
oscilloscope aer it is disconnected from measured circuits.
Ground the product. This product is grounded through the grounding
conductor of the power cord. To avoid electric shock, the grounding con-
ductor must be connected to earth ground. Before making connections to
the input or output terminals of the product, ensure that the product is
properly grounded.
Notice
Please read
the manual
Protective
ground
terminal
Measuring
ground
terminal
Chassis
ground
terminal

Connect the probe the right way. The probe ground lead is at ground po-
tential. Do not connect the ground lead to an elevated voltage.
Check all terminal ratings. To avoid fire or shock hazard, check all ratings
and markings on the product. Refer to the product manual for detailed in-
formation about ratings before making connections to the product.
Do not operate without covers. Do not operate this product with covers or
panels removed.
Avoid exposed circuitry. Do not touch exposed connections and compo-
nents when power is present.
Do not operate with suspected failures. If you suspect there is damage to
this product, have it inspected by qualified service personnel.
Assure good ventilation.
Do not operate in wet/damp environments.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
3. TECHNICAL SPECIFICATIONS
Channels 2
Bandwidth 70 MHz
Sampling Rate 250 MSa/s Single channel
125 MSa/s Dual channel
Oscillospe Specifications: -Horizontal
Rising time ≤ 5 ns
Waveform Interpolation (sin x)/x
Record length 6000 samples Single channel
3000 samples Dual channel
SEC/DIV Range of 1, 2, 5 Sequence 5 ns/div - 500s/div
Oscilloscope Specifications: -Vertical
A/D converter 8-bit resolution
VOLTS/DIV range 10mV/div –10V/div at BNC input
Measurement Range ± 5 div
Rising time at BNC input, typical ≤ 5 ns

Selectable analog bandwidth limit,
typical Typical 20 MHz (reduced to 6 MHz when using a 1x probe)
Low frequency response (-3db) ≤ 10 Hz
DC gain accuracy 10V/div - 10mV/div ±3% for normal or
Trigger
Type Edge
Mode Auto, Normal, Single
Level ± 4 divisions from centre of screen
Trigger level accuracy 0,2 div*volts/div within 4 div.
Slope Rising, falling, rising & falling
Source CH1, CH2
Input
Coupling DC, AC or GND
Input impedance (DC coupled) 25pF ±3pF, 1MΩ ±2%
Probe attenuation 1X, 10X
Supported probe attenuation factors 1X, 10X, 100X, 1000X
Input protection voltage 150 VRMS
Measurement
Values between cursors Voltage Dierence: △V
Time Dierence: △T
Automatic measurement Frequency, Amplitude
General specifications
Display type 2.6 inch 64K color TFT-LCD
Display resolution 320 horizontal x 240 vertical pixel
Display contrast Adjustable
Power supply voltage 100-240V AC, 50-60Hz OR 5V DC, 2A
Power consumption < 2.5 W
Fuse T, 3 A
Battery 2 x 2600 mAh
Operating temperature 0– 50°C
Storage temperature -20-60°C

Allowed relative humidity ≤ 40°C: ≤90% RH, 40-50°C: ≤60% RH
Cooling Method Convection
Altitude:
-Operating and Nonoperating 3 000 m (10 000 feet)
-Random vibration 0.31 gRMS from 50 - 500Hz, 10 minutes on each
axis
-Nonoperating 2,46 gRMS from 5 - 500 Hz, 10 minutes on each
axis
Mechanical shock in operation 50 g, 11 ms, half sine
Dimensions 199 x 98 x 40 mm
Weight 624 g
Arbitrary Waveform Generator:
Waveform Frequency Sine: 1Hz-25MHz; Square: 1Hz-10MHz;
Ramp: 1Hz-1MHz; Expon: 1Hz-5MHz
Sampling rate 250 MSa/s
Amplitude 2.5 Vpp (50Ω)/5Vpp (High impedance)
Frequency resolution 0,1 %
Channel CH1 waveform output
Waveform depth 512Sa
Vertical resolution 12 bit
Output impedance 50 Ω
Square Characteristics:
Pulse width accuracy ± 10 ns
Digital Multimeter:
Maximum resolution 4000 Counts
Testing Modes: Voltage, Current, Resistance, Capacity, Diode,
On-O
Maximum Input Voltage AC: 600 V/ DC: 600 V
Maximum Input Current AC: 10 A / DC: 10 A

Range Accuracy Resolution
DC Voltage
400.00mV
±（0.8% + 5）
100uV
4.000V 1mV
40.00V 10mV
400.0V 100mV
600.0V ±（1% + 2）1V
Overload protection:
400mV: 250V, other: 600Vrms.
AC Voltage
4.000V
±（1.2% + 5）
1mV
40.00V 10mV
400.0V 100mV
600.0V ±（1.5% + 5）1V
Frequency: 40Hz~400Hz;
Frequency of 400V and 600V: 40Hz~100Hz
DC Current
40.00mA ±（1% + 2）10uA
200.0mA ±（1.5% + 2）100uA
4.000A ±（1.8% + 2）1mA
10.00A ±（3% + 2）10mA
Overload protection:
self restoring fuse: 200mA/250V, 4A and 10A range no fuse.
AC Current
40.00mA ±（1.3% + 2）10uA
400.0mA ±（1.8% + 2）100uA
4.000A ±（2% + 3）1mA
10.00A ±（3% + 5）10mA
Frequency: 40Hz~400Hz;
self restoring fuse: 200mA/250V, 4A and 10A range no fuse.
Resistance
400.0Ω±（1% + 3）0.1Ω
4.000KΩ
±（1.2% + 5）
1Ω
60.00KΩ10Ω
400.0KΩ100Ω
4.000MΩ1KΩ
40.00MΩ±（1.5%±3）10KΩ
Overload protection: 220Vrms
Capacity
40.00nF
±（3% + 5）
10pF
400.0nF 100pF
4.000uF 1nF
40.00uF 10nF
100.0uF 100nF
Overload protection: 220Vrms
Diode 0V~1.0V
On-O <50Ω

All specifications herein mentioned apply to the series oscilloscopes. Before
checking an oscilloscope to see if it complies with these specifications, make sure
it meets the following conditions:
The oscilloscope must have been operating continuously for twenty minutes un-
der the specified operating temperature.
The Do Self Cal operation must be performed through the Utility menu if the oper-
ating temperature changes by more than 5°C.
The oscilloscope must be within the factory calibration interval.
All specifications are guaranteed unless noted ‘typical’.
This Oscilloscope is a small, lightweight portable instrument which provides the
user with a convenient and easy to operate front panel with which you can per-
form basic tests.
• General Inspection:
Please check the instrument as following steps aer receiving:
Check the shipping container for damage: Keep the damaged shipping contain-
er or cushioning material until the contents of the shipment have been checked
for completeness and the instrument has been checked mechanically and electri-
cally.
Check the accessories: Accessories supplied with the instrument are listed in
"Accessories" in this manual. If the contents are incomplete or damaged, please
notify the franchiser.
Check the instrument: In case there is any mechanical damage or defect, or the
instrument does not operate properly or fails performance tests, please notify
your reseller.
• Use of safety keyhole:
A safety keyhole is reserved on the
back shell of the oscilloscope. Users
need to purchase the safety lock by themselves. Wrap one end of the safety lock
around a hard-to-move object, insert the other end into the safety lock hole, turn
the key clockwise to lock the instrument, and then pull out the key. In this way,
the most basic anti-the requirements can be achieved.
4. GETTING STARTED

Adjust the bracket
When using the instrument, you can open the
support foot to tilt the instrument upward for
easy operation and observation. When the
instrument is not in use, the user can close the
support foot to facilitate placement or han-
dling.
Aer adjusting the rack, the instrument can be
suspended on the vertical plane.
• Front Panel
The following diagram briefly describes the
front panel of this oscilloscope.

• The user interface
• Functional Check
Follow the steps below to perform a quick functional check to your oscilloscope.
Power
Press the power key and the device starts. Press the power key again, and the de-
vice will shut down. Before starting it, please confirm that the battery has enough
power. The oscilloscope is supplied with a power adapter with USB-Type-C plug.
The input AC power supply is 100~240V, 50~60Hz. The output is 5V@2A. The power
adapter can be used to supply the oscilloscope or charge the battery.
When connect the power adapter to the oscilloscope, if the battery is not installed
inside the oscilloscope, the power key backlight is red and flash; if the battery is
installed inside the oscilloscope and the battery power is not filled, the power key
backlight is red; if the battery is installed inside the oscilloscope and the battery
power is full, the backlight of the source key is extinguishes.
Observe the waveform
1. Set the switch on the probe to 1X and connect the probe to Channel 1 on the
oscilloscope. First, align the slot in the probe connector with the protuberance on
the CH1 BNC and push to connect; then, turn to right to lock the probe in place.
2. If you use the probe hook-tip, the hook end should be removed, the probe pin
should be inserted into the Gen Out output terminal, and the probe grounding
clamp should be clamped on the metal outer ring of the Gen Out output terminal.
Recommended input ~2V@1KHz peak-peak square wave.

3. Press the Auto button and you should see within a few seconds a square wave
of about 2V peak-to-peak at 1KHz in the display. Repeat the steps to observe CH2.
• Probe check
Safety
When using the probe, keep your fingers behind the
guard on the probe body to avoid electric shock. Do
not touch metallic portions of the probe head while it
is connected to a voltage source. Connect the probe to
the oscilloscope and connect the ground terminal to
ground before you start any measurements.
Manual Probe Compensation
Upon the first connection of a probe and an input channel, you should manually
perform this adjustment to match the probe to the input channel. Uncompensated
or wrong compensated probes may lead to errors or faults in measurement. To
adjust the probe compensation, follow the steps below.
1. Press Channel button to enter channel setting menu, Set the Probe option at-
tenuation in the channel menu to 10X. Set the switch on the probe to 10X and con-
nect the probe to Channel 1 on the oscilloscope. If you use the probe hook-tip, the
hook end should be removed, the probe pin should be inserted into the Gen Out
output terminal, and the probe grounding clamp should be clamped on the metal
outer ring of the Gen Out output terminal. The oscilloscope with signal generator
function needs to set output signal as 2V @ 1KHz square wave; The Gen Out termi-
nal of the oscilloscope without signal generator function automatically outputs 2V
@ 1KHz square wave. Press the Auto button.
2. Check the shape of the displayed waveform.
3. If necessary, use a nonmetallic screwdriver
to adjust the variable capacity of your probe
until the shape of the waveform turns to be
the same as the above figure. Repeat this step
as necessary. See the figure below for the way
of adjustment.
Probe Attenuation Setting: Probes are of
various attenuation factors which aect the
vertical scale of the signal. The Probe Check
function is used to verify if the Probe attenua-
tion option matches the attenuation of the probe.
Compensated correctly
Overcompensated
Undercompensated

You can press Channel button to enter the channel setting menu and select CH1,
and select the Probe option that matches the attenuation factor of your probe.
Make sure that the Attenuation switch on the
probe matches the Probe option in the oscillo-
scope. Switch settings are 1X and 10X.
When the Attenuation switch is set to 1X, the
probe limits the bandwidth of the oscilloscope
to 6MHz. To use the full bandwidth of the oscil-
loscope, be sure to set the switch to 10X.
Menu and Control Keys
All the keys are described as follows:
Scope: Oscilloscope mode
DMM：Multimeter mode
AWG：Waveform generator
Menu：Function menu
Trig：Trigger setting menu
Enter: In scope, it saves the user-
defined settings of the oscilloscope;
In generator, press the button to
confirm aer entering the character.
Auto: It adjusts the horizontal and
vertical scales of the oscilloscope
automatically and sets the trigger
coupling, type, position, slope, level
and mode, etc., to acquire a stable waveform display.
Channel: Channel setting menu
Time: Horizontal setting menu
Zoom and move keys:
In the trigger menu, the le and down keys push the trigger level down, and the
right and upper direction keys push the trigger level up;
In the channel menu, the upper and lower direction keys change the zero level posi-
tion of the channel, and the le and right direction keys change the volt/div of the
channel;
In the time base menu, the upper and lower direction keys change the time/div, and
the le and right direction keys change the horizontal trigger position;
In DMM, switch measurement function;
In generator, aer choosing a parameter, the le and lower direction key will reduce
the parameter value, the right and up direction key will increase the parameter val-
ue; it is also used for the digital selection of the virtual keyboard.
5. FUNCTION INTRODUCTION

F1/F2/F3/F4: Multi function key, in each menu mode, is responsible for selecting
corresponding menu items in the screen.
• Connectors
Gen Out: The Gen Out terminal of the oscilloscope without signal genera-
tor function always outputs 2V @ 1KHz square wave.
Shortcut keys. Long press this button to enter the menu, and
choose shortcut key function; Aer setting, press this button sin-
gle time to respond to the corresponding function.
In scope, stop or run the waveform acquisition;
In DMM, hold the measuring data or update data;
In generator, turn on or o the waveform output.
Power key.

• Automatic set
Auto set is one of the advantages digital oscilloscopes have. When you push the Auto
button, the oscilloscope will identify the type of waveform (sine or square wave) and
adjust controls according to input signals so that it can accurately display the wave-
form of the input signal.
The Auto function examines all
channels for signals and displays
corresponding waveforms.
Auto determines the trigger
source according to the following
conditions :
If multiply channels get signals,
the oscilloscope will use the
channel with the lowest frequen-
cy signal as the trigger source.
If no signals are found, the oscil-
loscope will use the lowest-
numbered channel displayed in Auto Scale as the trigger source.
If no signals are found and no channels are displayed, the oscilloscope will display
and use Channel 1 as the trigger source.
• Default settings
Functions Settings
Cursor O
Display Format Set to YT
Horizontal Position Adjusted
SEC/DIV Adjusted
Trigger Level Set to 50%
Trigger Mode Auto
Trigger Source Adjusted
Trigger Slope Adjusted
Trigger Type Edge
Vertical Bandwidth Full
Vertical Coupling Unchanged
VOLTS/DIV Adjusted
Menu or Sys- Option, Button or Default Setting
Cursor
Type Off
Source CH1
Horizontal (amplitude) ±4div
Vertical (time) ±4div
Display Format YT
Horizontal Position 0.00s
SEC/DIV 500μs
Measure On or Off Off
Trigger (Edge)
Source CH1
Slope Rising
Mode Auto
Level 0.00v
Vertical Sys-
tem,
All Channels
Bandwidth Limit Unlimited
Coupling AC
Probe Attenuation 1X
Position 0.00div (0.00V)
VOLTS/DIV 1V

Long press button, to enter Short key setting menu, and select Default.
Press button, pops up the prompt to recall the default settings on the screen,
now press F1 to confirm. The oscilloscope will display the CH1 waveform and remove
all the others. Press F4 to cancel. The table below gives the options, buttons and con-
trols that change settings at default setup.
The following settings do not change when you recall default settings:
Language options, saved settings, saved waveforms, saved reference waveforms,
calibration data.
• Horizontal System
Press Time button to enter horizontal system menu, use the direction keys to change
the horizontal scale (time base) and the horizontal trigger position. When you change
the horizontal scale, the waveform will expand or contract to the screen center.
1. SEC/DIV Knob: Used to change the horizontal time scale to magnify or compress
the waveform horizontally. If the waveform acquisition is stopped (by using button),
press Time button and Up or Down buttons to expand or compress the waveform.
2. Horizontal Position Knob: Used to control the trigger position against the screen
center. Press Time button and Right or Le buttons to move the waveform right or
le. The key resolution vary according to time base. Press "AUTO" key can make the
horizontal position return to zero.
3. Mode: Y-T, X-Y, Roll, Scan.
Y-T: YT format shows the vertical voltage in relation to time (horizontal scale). Press
Time->Mode to set.
X-Y: The XY mode is used to analyze phase dierences, such as those represented by
Lissajous patterns. The format plots the voltage on CH1 against the voltage on CH2,
where CH1 is the horizontal axis and CH2 is the vertical axis. You may view the same
waveform in XY mode. To perform this operation, stop the acquisition and press Time
->Mode to change the display mode to X-Y.
Roll: In Roll mode, the waveform display rolls from right to le. Trigger or horizontal
oset control of waveforms is available during Roll Mode, and it’s only available when
set to 100ms/div or slower. Press Time->Mode to change the display mode to Roll, the
time/div will be changed to 100ms/div automatically.
Scan: In Scan Mode, the waveform display scan updates from le to right. In Scan
mode, trigger and horizontal oset control of waveforms are available during Scan
Mode. This mode is only available when set to 100ms/div or slower. Generally, used
for measuring low frequency signal. When the time/div is 100ms/div or slower, the
oscilloscope automatically enters the scan mode.

Vertical System
Vertical system can be used to adjust the vertical scale and location and other set-
tings of the channel. Each channel has a separate vertical menu, and each channel
can be set separately.
1.Vertical Position
Press Channel->F1 to select the channel, and press Up or Down direction keys to
move the vertical position of the selected channel.
2. VOLTS/DIV Settings
The range of Volt/div is 10mV/div-10V/div (1X), or 100mV/div-100V/div (10X), 1V/div-
1000V/div (100X), step by 1-2-5. Press Channel->F1 to select the channel, and press
Right or Le direction keys to change the Volt/div of the selected channel.
3. Channel Setting Menu
• Trigger System
The trigger determines when the oscilloscope begins to acquire data and display a
waveform. Once a trigger is properly set up, the oscilloscope can convert unstable
displays or blank screens to meaningful waveforms.
The triggering mode of this series oscilloscope is edge trigger.
Edge trigger distinguishes the trigger points by seeking the specified edge (rising,
falling, rising & falling) and trigger level.
Press Trig button to enter trigger menu.
Trigger Source: Select the trigger source signal to CH1 or CH2. You can use the trig-
ger source options to select the signal that the oscilloscope uses as a trigger.
Options Settings Comments
On/O On
O Turn on the waveform display.
Turn o the waveform display.
Coupling DC
AC
GND
DC passes both DC and AC components of the input signal.
AC blocks the DC component of the input signal and attenu-
ates signals below 10Hz.
GND disconnects the input signal.
Probe 1X 10X
100X
Selects a value according to the probe attenuation factor so
as to ensure correct vertical readouts.
Reduce bandwidth to 6MHz when using a 1X probe.
BW
Limit On O
Limits the bandwidth to reduce display noise; filters the
signal to eliminate noise and other unnecessary HF compo-
nents.
Invert On
O
The invert function turns the displayed waveform 180 de-
grees, with respect to the ground level. When the oscillo-
scope is triggered on the inverted signal, the trigger is also
inverted.

Slope: Select the
trigger slope to rising,
falling, rising &
falling.
Trigger Mode: You can select the Auto or Normal mode to define how the oscil-
loscope acquires data when it does not detect a trigger condition. Auto Mode per-
forms the acquisition freely in absence of valid trigger. It allows the generation of
untriggered waveforms with the time base set to 100ms/div or slower. Normal Mode
updates the displayed waveforms only when the oscilloscope detects a valid trigger
condition. Before this update, the oscilloscope still displays the old waveforms. This
mode shall be used when you only want to view the eectively triggered wave-
forms. In this mode, the oscilloscope displays waveforms only aer the first trigger.
To perform single trigger acquisition, the trigger mode can be set to "single". When
triggered, a single waveform is acquired and then stop.
Force Trigger: Used to complete an acquisition regardless of an adequate trigger
signal. This button becomes useless if the acquisition is already stopped.
Trigger Level: It sets the amplitude level the signal must cross to cause an acquisiti-
on when using the Edge or Pulse Width trigger. Press Trig button to enter, and press
Up or Down direction keys to change the trigger level.
• Save Waveforms
Press Menu button to enter, and select Save to enter store waveform menu. The
waveform can be saved to the oscilloscope inside, also can be recalled to view.
The Save Menu Table:
To save the waveform, follow these steps:
1. Press F1 to select the storage position of the waveform.
2. Press F2 to save the waveform data to the specified position. Also, users can long
press button to enter, and select F4->F2 (Data Save) as shortcut keys.
Press button one time to save the current waveform data.
3. Press F3, to recall the saved waveform. The waveform can be enlarged or reduced
in the Channel or Time menu by using the direction keys.
Attention:
1. Waveform storage can not only save the waveform of the current channel, but
also save the current state settings at the same time.
2. Users can permanently store 6 waveforms in the oscilloscope memory and rewrite
them at any time.
Menu Setting Description
Position 1,2,3,4,5,6 Select the internal storage position.
Save Save waveform data.
Recall Recall the waveform.

Reference Waveform
The REF channel is used to display the reference waveform, which can compare the
actual waveforms with the reference waveforms to find out the dierences.
Press Menu button to enter, and select Ref to enter reference Waveform menu.
REF Menu Table:
To save the reference waveform, follow these steps:
Press F1 to select the position of the reference waveform.
Press F2 to open the REF channel.
Press F3 to select the source to CH1 (or CH2), and only select the open channel.
Press F4 to save the current waveform to the specified location.
• Measurement
Scale measurement
Graticule: This method allows you to make a quick, visual estimate and take a simp-
le measurement through the graticule divisions and the scale factor.
For example, you can take simple measurements by counting the major and minor
graticule divisions involved and multiplying by the scale factor. If you counted 6 ma-
jor vertical graticule divisions between the minimum and maximum values of a wave-
form and knew you had a scale factor of 50mV/division, you could easily calculate
your peak-to-peak voltage as follows: 6 divisions x 50mV/division = 300mV.
Cursor measurement
The cursor measurement has two parallel lines on the screen, and move two lines to
measure the time and voltage parameters of the input signal. The result of cursor
measurement will be displayed on the second page of the cursor menu. Before use
cursor measurement, make sure that the measured source is the signal you need to
measure.
Press Menu button to enter, and select Cursor to enter cursor measurement.
Menu Setting Description
Position Ref-A
Ref-BThe REF waveform is saved to the oscilloscope Ref-A or Ref-B.
Enable On
O Open the REF waveform.
Close the REF waveform.
Source CH1
CH2 Select CH1 to save as a REF waveform.
Select CH2 to save as a REF waveform
Save Save the REF waveform.
Menu Setting Description
Enable On
O Open the cursor measurement.
Close the cursor measurement.
Type Voltage
Time The horizontal line is shown to measure the voltage parame- ters. The vertical line is shown to measure the time parameters.
Source CH1
CH2 Select the measured source.
Cursor1 Select Cursor1 and press up, down, le and right keys to move
the Cursor1 position, and display the Cursor1 value.
Cursor2 Select Cursor2 and press up, down, le and right keys to move
the Cursor2 position, and display the Cursor2 value.
Incre-
ment The dierence between the Cursor1 and the Cursor2.

To do cursor measurement, follow these steps:
1. Press F1 to open the cursor measurement;
2. Press F2 to select a type of cursor measurement.
3. Press F3 to select the channel that needs to be measured.
4. Press F4 to enter the second page, press F1 or F2 to select Cursor1 or Cursor2, press
up, down, le and right to move Cursor1 or Cursor1;
5. The result of cursor measurement will be displayed on the cursor menu.
Automatic Measurement
The oscilloscope provides 2 kinds of automatic measurements, including frequency
and amplitude.
Press Menu button to enter, select Measure to enter automatic measurement. Press
F1 to open, the measurement results will be displayed in the top le corner of the
screen.
Attention:
In the measurement result, the yellow font is the result of CH1, and the green font is
the result of CH2.
• Utility
Press Menu Button to enter.
Menu Description
Frequency Measure the frequency of the signal.
Maximum Voltage Measure the maximum voltage of the signal.
Minimum Voltage Measure the minimum voltage of the signal.
Menu Setting Description
Language German English
French Set the menu language.
Sound On
O Open the key sound.
Close the key sound.
Backlight
luminance 1~10 Set backlight brightness of the screen.
Backlight
time
30s
60s
90s
120s
Unlimited
Set the screen backlight time.
System
infor-
mation Display system information, such as soware version or
PCB version.
Automatic
shutdown
5 Minute
10 Minute
20 Minute
30 Minute
Unlimited
Set automatic shutdown time.
Calibration Start
Return Start the self calibration.
Exit the self calibration.

Note:
1. Backlight time and automatic shutdown time will not be executed when the os-
cilloscope is plugged in with an external charging device or connected to a comput-
er via a USB cable.
2. Shutdown automatically saves last setup.
Self calibration
The self calibration routine helps optimize the oscilloscope signal path for maxi-
mum measurement accuracy. You can run the routine at any time but should al-
ways run it if the ambient temperature changes by 5°C or more. For a more accu-
rate calibration, please power on the oscilloscope and wait for 20 minutes until it
has adequately warmed up.
To do self calibration, follow these steps:
1. Ensure that no input signal is input, otherwise it may damage the instrument.
2. Press Menu button to select the self calibration function.
Shortcut key
Long press button to enter shortcut key settings menu, and choose shortcut
key function; Aer setting, press this button single time to respond to the corre-
sponding function.
Default settings: Long press button to enter, and select F1 (Default) as the
shortcut key, then press button one time and select F1 TO confirm to recall
the default settings
Custom settings: Long press button to enter, and select F2 or F3 (custom 1 or
2) as shortcut keys. Now press Enter button and click F1 to confirm to save the cur-
rent settings to custom settings. Press button one time and click F1 to con-
firm to recall the custom settings.
Save data: Long press button to enter, and select F4->F1 (Data Save) as
shortcut keys. Press Menu -> Save to enter the save menu, select a location, press
button one time to save the current waveform data.
Interface
This chapter introduces
the multimeter function.
The measuring types
include DC voltage (V,
mV), AC voltage, DC cur-
rent (A, mA), AC current
(A, mA), resistance, ca-
pacitance, diode, and on
-o test.
6. DIGITAL MULTIMETER

Measurement
1. DC and AC voltage measurement
Press the power button to turn on, then press the "DMM" button to enter to the multi
meter function interface;
Press the up, down, le and right direction keys or F1, F2, F3, F4 multi-function keys
to select "DC V", "DC mV" or "AC V";
Insert the black pen into the input port of the COM banana socket, and insert the red
pen into the input port of the V/Ω/C banana port;
Connect the red and black forms to the measured point. The voltage value of the
measured point will be displayed on the screen.
2. DC and AC current measurement
Press the power button to turn on, then press the "DMM" button to enter to the multi
meter function interface;
To measure the DC current greater than 200mA, press the up, down, le and right
keys or F1, F2, F3, F4 multi function keys to select "DC A" or "AC A", and insert the
black pen to the input end of the COM banana socket, and insert the red pen into the
input port of the “A” banana socket;
To measure the DC current less than 200mA, press the up, down, le and right keys
or F1, F2, F3, F4 multi function keys to select "DC mA" or "AC mA", and insert the
black pen to the input end of the COM banana socket, and insert the red pen into the
input port of the “mA” banana socket.;
Connect the red and black forms to the measured point. The current value of the
measured point will be displayed on the screen.
3. Resistance measurement
Press the power button to turn on, then press the "DMM" button to enter to the multi
meter function interface;
Press the up, down, le and right direction keys or F1, F2, F3, F4 multi-function keys
to select "OHM";
Insert the black pen into the input port of the COM banana socket, and insert the red
pen into the input port of the V/Ω/C banana port;
Connect the red and black forms to the measured point. The resistance value of the
measured point will be displayed on the screen.
4. Capacity measurement
Press the power button to turn on, then press the "DMM" button to enter to the multi
meter function interface;
Press the up, down, le and right direction keys or F1, F2, F3, F4 multi-function keys
to select " ";
Insert the black pen into the input port of the COM banana socket, and insert the red
pen into the input port of the V/Ω/C banana port;
Connect the red and black forms to the measured point. The capacitance value of
the measured point will be displayed on the screen.
5. Diode measurement
Press the power button to turn on, then press the "DMM" button to enter to the multi
meter function interface;
Press the up, down, le and right direction keys or F1, F2, F3, F4 multi-function keys
to select " ";
Insert the black pen into the input port of the COM banana socket, and insert the red
pen into the input port of the V/Ω/C banana port;