MUSTOOL MT8208 User manual

Scope Meter
User’s Manual

Preface
Dear users,
Thank you for purchasing this digital oscilloscope multimeter. We believe its innovative function combination
and humanized design will bring great convenience to your site tests. Before use, please carefully read this manual,
especial the part of "Safety Instructions". Please also keep this manual property for future reference.
Contents
SAFETY INSTRUCTIONS..............................................................................................................................................1
INTRODUCTION OF INSTRUMENT........................................................................................................................... 4
Main features.............................................................................................................................................................4
Button functions........................................................................................................................................................5
BASIC OPERATION....................................................................................................................................................... 6
Power on and off....................................................................................................................................................... 6
Automatic sleep.........................................................................................................................................................6
OSCILLOSCOPE OPERATION ................................................................................................................................... 7
Enter oscilloscope mode........................................................................................................................................... 7
Basic display content in oscilloscope mode............................................................................................................. 7
Function buttons and main option menu.................................................................................................................. 8
Time base adjustment................................................................................................................................................8

Amplitude adjustment...............................................................................................................................................9
Trigger control.........................................................................................................................................................10
Trigger level adjustment......................................................................................................................................... 10
About trigger mode................................................................................................................................................. 11
About automatic waveform capture........................................................................................................................11
Reminder of scanning status................................................................................................................................... 12
Single scan trigger operation.................................................................................................................................. 12
Holding of signal waveform................................................................................................................................... 13
Storage and reading of waveform of signals.......................................................................................................... 13
THE OPERATION OF MULTIMETER........................................................................................................................15
Enter multimeter mode........................................................................................................................................... 15
Basic content displayed under mutlimeter mode....................................................................................................15
Switching measurement function............................................................................................................................16
Selection of manual/automatic measuring range....................................................................................................16
Relative value measuring mode..............................................................................................................................17
Peak hold (P-H) mode.............................................................................................................................................17
AC and DC voltage measurement.......................................................................................................................... 19
AC and DC current （400mA，10A）measurement...........................................................................................20
Frequency counting and measurement of duty ratio.............................................................................................. 21
Resistance measurement......................................................................................................................................... 22
Diode detection....................................................................................................................................................... 23

Continuity test......................................................................................................................................................... 24
Capacitor measurement...........................................................................................................................................24
10mF capacitor measurement................................................................................................................................. 25
The holding of measurement data...........................................................................................................................26
Measurement data storage and reading...................................................................................................................26
TECHNICAL PARAMETERS AND COMPLETE SETS OF INSTRUMENTS........................................................ 28
General features...................................................................................................................................................... 28
Oscilloscope characteristics....................................................................................................................................28
Multimeter features................................................................................................................................................. 29
Display symbols and icons......................................................................................................................................30
Complete sets and options of the instrument..........................................................................................................31
DAILY MAINTENANCE AND TROUBLESHOOTING............................................................................................32

1
Safety Instructions
This digital oscilloscope multi-meter is designed in conformity with safety specifications of IEC1010-1. Second
category of overvoltage measurement: CAT III - 1000V; pollution protection level: Level 1.
1. Before use, please check the machine shell first to check if there are cracked or any required plastic part is missing.
Do not use instrument with broken shell. Special attention shall be paid to the insulating layer of test leads and
connecting lines. When using test leads, do not touch the metal part of the probe of test leads with your finger;
2. Do not operate the multimeter in high-temperature, moist, rainy, inflammable and explosive environment or when
the instrument is wet;
3. Never apply any voltage or current which exceeds the maximum limit of the instrument;
Function
Use input
Maximum limit
mV DC
V//Cap，COM
250V DC+AC peak value, within 10 seconds
V DC
V//Cap，COM
1000V DC+AC peak value, within 10 seconds
V AC
V//Cap，COM
750V DC+AC effective value, within 10 seconds
Hz%
V//Cap，COM
250V DC/AC effective value, within 10 seconds
mA AC/ DC
mAmF，COM
500mA DC/AC effective value，250V/500mA fuse type protective tube
A AC/ DC
10A，COM
10A DC/AC effective value ，within 30 seconds ，15-minute cooling
interval . 250V/10A fuse type protective tube
V//Cap，COM
250V DC/AC effective value，within 10 second
mF
V//Cap，mAmF
250V DC/AC effective value，within 10 second

2
4. When changing measuring function, please make sure the probe of test leads is taken away from the test point
before plugging in/out the plug of test leads and before switching on/off the device;
5. Pay attention to the safety warning signal displayed on the instrument: When the measured voltage exceeds the
"safety voltage" (24V ), a warning information " " is displayed to remind you;
6. When the voltage to earth on the reference end "COM" of the instrument reaches 500V, please do not make
voltage measurement;
7. Please do not make AC current measurement of circuits with a voltage of over AC 250V;
8. When measuring functions are pointed at the gears of current, resistance, continuity test, diode, capacitance etc.,
never bridge the test leads over the two ends of the probe of voltage;
9. Before the test of resistance, diode/continuity test, the power of the equipment to be tested must be cut off and
make sure the capacitor of the circuit has been fully discharged;
10. Before opening the back cover of instrument for replacement of protective tube, the power of the instrument
must be turned off and the test lead should be kept away from the circuit to be tested; protective tube of the same
specification must be used for replacement;
11. Do not alter or dismantle the product or its accessories or use them for purposes other than the purpose for which
the product is designed. No accessory and attachment may be replaced casually;
12. Do not let children use this device or use it as a toy.

3
Safety signs
Caution, danger! This sign appears near other signs or socket terminals to remind users that the
instruction of the manual must be followed during operation, so as to prevent damage to the
instrument/personal injury.
Caution, electricity shock! This sign appears near one or more terminals to indicate that there
may be hazard voltage in the terminal(s) during use. To ensure utmost safety, please avoid
touching the testing end of test leads when there is voltage in the terminal(s).
Instruction!
Instruction suggests that special attention should be paid during operation, as wrongful operation
will result in incorrect measurement result or damage of accessories.
Attention!
Attention suggests that the operation must be done very carefully, as wrongful operation or
violation may result in damage of the product or other property.
Warning!
Warning suggests that high concentration is required during operation, as wrongful operation or
violation may result in personal injury or even endangering of life.

4
Introduction of Instrument
Main features
◆2.5Msps high-speed sampling, 1MHz analog bandwidth(Only for oscilloscopes with ACV), 4000 count digital
multimeter.
◆One-click visual wave, there are three waveform scanning modes: automatic/conventional/single.
◆Save function for data and waveform in the measurement; a total of 100 sets of data and 10 waveform can be
saved.
◆When measuring waveforms, you can set parameters independently, such as: time base, amplitude, waveform
scanning mode, etc.
◆REL, effectively eliminate the lead resistance, distributed capacitance and interference signal.
◆Multimeter functions include DC/AC voltage/current, resistance, capacitance, frequency, duty cycle,Diode
continuity test.
◆Automatic/manual switching for measuring range and display of measurement data and historic data on the same
screen.
◆Overload protection 500mA/10A double protective tube, dual protection of the instrument.
◆Automatic shutdown in case of no operations for 15 minutes: bright backlight and clear display.
◆Adopt 2.4 inch color screen display, the display effect is clear.
◆Higher reliability: no adjustment of potentiometer is required for panel calibration and internal storage calibration.

5
Button functions
BUTTONS
Name
Function
F1 ~ F4
The actual function varies with the measuring range
and work mode. The option menu displayed on the
LCD serves as the prompt for action.
R
Multimeter status
Manual range
Oscilloscope state
Automatic capture
S
Data lock and save
Instrument switch
DC millivolt voltage
DC voltage
AC voltage/frequency/duty cycle file
Frequency/Duty Cycle
Resistance/diode/continuity test/capacitance
Millifa capacitance
AC/DC mA
AC/DC 10A

6
Basic operation
Power on and off
Rotate the rotary knob to desired measurement gear and the power is connected to the instrument; rotate the
rotary knob to OFF position to turn off the power.
Attention
• Be sure to move the test probe away from the test point before shutting down.
• After the instrument is used, the power must be turned off in time.
Automatic sleep
If there is no operation for a set period of time, the instrument will get into automatic sleep. To turn off the
function of automatic sleep, user may press the " F1" button and then rotate the rotary knob to turn on the instrument.
In this way, the instrument is set to continuous working mode.

7
Oscilloscope operation
Enter oscilloscope mode
In multimeter mode (DMM) mode voltage, current range, press the "R" key for 2 seconds to enter the
oscilloscope (OSC) mode.In oscilloscope (OSC) mode. Press the "R" key for 2 seconds to enter the multimeter mode
(DMM) mode. The range control mode will be switched to manual mode.
1. DCmV, DCV，DCmA, DCA, the oscilloscope (OSC) mode, can only observe the change of level.
2.The current range impedance is small, the oscilloscope (OSC) mode, within 5KHZ is for reference only. Not tested
above 5kHz. Basic display content in oscilloscope mode

8
Function buttons and main option menu
The function buttons of F1~F4 are located at the lower of the LCD screen. With the option menu on the screen,
these buttons will enable users to realize several functions. Some functions are provided with sub-option menu for
further operations. Please refer to relevant later sections for the usage of these main option menu and sub-menus.
The main option menu provides the instructions for basic operations of the instrument and the details are as follows:
Time base adjustment
Amplitude adjustment
Trigger control
TIME
RANGE
TRIG
F1
F2
F3
1. Press the F1 key (TIME) to enter the time base adjustment sub-menu, adjust the time base and trigger position.
2. Press the F2 key (RANGE) to enter the amplitude adjustment sub-menu, adjust the vertical amplitude and
waveform position.
3. Press the F3 key (TRIG) to enter the trigger control sub-menu, adjust the trigger edge/mode/level.
Time base adjustment
Under the main menu of the oscilloscope, press the F1 key (TIME), the meter enters the time base adjustment
sub-menu:
Back
Time base adjustment
EXIT
◄
►
F1
F2
F3
1. Press the F1 key (EXIT) to exit the time base adjustment sub-menu and return to the main menu.
2. Press the F2 key (◄), F3 key (►) to adjust the time base (t /div)。

9
Instructions!
• When measuring a signal whose frequency is unknown, user has to try to collect the waveform
from the fastest time base and then gradually select the slower time base until the signal can be
displayed correctly. Otherwise, due to "aliasing effect", waveform may fail to correctly reflect
the actual situation of the signal.
• There are several ways to avoid aliasing effect: adjust the time base or press "R" button.
Amplitude adjustment
Under the main option menu of oscilloscope mode, press F2 key (RANGE) to enter into the sub-option menu of
vertical control:
Back
Amplitude adjustment
EXIT
X1X3
X10
F1
F2
F3
1. Press the F1 key (EXIT) to exit the amplitude adjustment sub-menu and return to the main menu.
2. Press the F2 key (X1X3). The F3 key (X10) is used to adjust the vertical amplitude (V/div).
Note: The F2 key (X1X3) switches back and forth between X1 and X3, and the F3 key (X10) cycles from small to
large.

10
Trigger control
In the main menu of the oscilloscope mode, press the F3 key (TRIG) to enter the trigger control sub-menu:
Back
Trigger edge
Trigger Mode
Trigger level
EXIT
MODE
LEVEL
F1
F2
F3
F4
1. Press the F1 key (EXIT) to exit the trigger control sub-menu and return to the main menu.
2. Press the F2 key ( " " or " " ) to select the rising edge or falling edge trigger.
3. Press the F3 key (MODE) to select the trigger mode.
4. Press the F4 key (LEVEL) to enter the trigger level adjustment sub-menu.
Trigger level adjustment
Under the trigger setting sub-menu, press the F4 key (LEVEL) to enter the trigger level adjustment sub-menu:
Back
Trigger level adjustment
Trigger level reset
EXIT
▼
▲
RESET
F1
F2
F3
F4
1. Press the F1 key (EXIT) to exit the trigger level adjustment sub-menu and return to the trigger control sub-menu.
2. Press the F2 key (▼) and F3 key (▲) to decrease or increase the trigger level. The position corresponding to the
current trigger level will be marked on the display.
3. Press the F4 key (RESET) to reset the trigger level to zero.

11
About trigger mode
Auto : Even if no trigger condition is detected, the oscilloscope can still acquire waveforms. If there is no
trigger condition, after the oscilloscope waits for a certain period of time, it will trigger itself and start collecting data.
Since there is no correct trigger, the waveform displayed by the oscilloscope scrolls on the screen because it cannot
be synchronized. Once a legal trigger signal is detected, the waveform can be stabilized on the screen. Users can use
this mode to monitor low-frequency random signals or observe the amplitude of signals, such as the waveform of a
DC power supply.
Normal : The waveform data is collected only after the trigger signal is detected. If no trigger occurs, the
oscilloscope will not acquire a new waveform. The display content will not be refreshed.
Single : In single mode, once the trigger condition is detected, the oscilloscope starts waveform data acquisition.
When new data is acquired, the latest waveform will be automatically maintained.
About automatic waveform capture
1. Automatic waveform capture is only available in AC gear, and the automatic waveform capture time is about 5-15
seconds.
2. Automatic waveform capture signal requirements: amplitude greater than 0.3VPP. frequency greater than: 10Hz.

12
Reminder of scanning status
Auto
In automatic mode, waveforms can be acquired without triggering conditions.
wait
Wait for the trigger condition.
Trig
The trigger condition has been detected.
Stop
Keep locked
Single scan trigger operation
The steps for single-triggered data collection are as follows:
1. Adjust the vertical amplitude V/div and horizontal amplitude s/div to suit the waveform to be acquired.
2. Select the appropriate trigger level, trigger edge and select Single trigger mode Single.
3. Once the signal appears, the oscilloscope will be triggered and captured.

13
Holding of signal waveform
When collection of data is continuing, the waveform of signals will be constantly refreshed. When the data
collection is stopped, the display content will be held. The main purpose of holding waveform is to hold the current
data or waveform, so as to make close observation easier. There are two methods for holding waveform data: Press
"S" button or use single trigger scanning mode.
Press "S" button to start or stop the collection of waveform data. The last waveform on the screen can be
maintained immediately after pressing the "S" key.Once the collection of waveform data by the oscilloscope is
ceased, the display is held.
Storage and reading of waveform of signals
The OSC database of the instrument is provided with a memory space for 10 OSC waveform data. The
operation method of the storage is as follows:

14
1. Press the "S" key to keep the current waveform.
2. Press the "S" key and stay for 2 seconds to enter the database, press the F1 key (◄) / F2 key (►) to select the
storage location, press the F4 key (SAVE) to save the current waveform.
3. Press the "S" key again and stay for 2 seconds to exit the database.
The menu of DATABASE are as follows:
Page up
Page down
Delete
Save
◄
►
ERASE
SAVE
F1
F2
F3
F4
a. Press F1 key (◄) to select the previous data location.
b. Press F2 key (►) to select the next page data location.
c. Press F3 key (ERASE) to delete the waveform at current page.
d. Press F4 key (SAVE) to save current and held waveform on current page.

15
The operation of multimeter
Enter multimeter mode
Turn on the default multimeter mode (DMM) mode, or press the "R" key for a long time to switch modes.
Warning!
• Please read, understand and follow the safety rules and operating methods indicated in the following.
• When changing the measurement function, please be sure to remove the probe of the test lead from
the test point first.
Basic content displayed under mutlimeter mode
Please note that the symbols in the picture do not include the entire character set of the instrument and that these
symbols do not necessarily appear at the same time.