multicomp pro MP720644 User manual

Models MP720644 and MP720774
Quick Guide

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Table of Contents
1. General Safety Requirements.....................................................................................1
2. Safety Terms and Symbols..........................................................................................2
3. Quick Start ................................................................................................................4
Introduction to the Structure of the Oscilloscope....................................................................4
Front Panel.....................................................................................................................................................4
Side Panel.......................................................................................................................................................5
Top Panel........................................................................................................................................................6
User Interface Introduction.......................................................................................................6
How to Implement the General Inspection...............................................................................8
How to Implement the Function Inspection .............................................................................8
How to Implement the Probe Compensation..........................................................................10
How to Set the Probe Attenuation Coefficient........................................................................11
How to Use the Probe Safely....................................................................................................11
How to Implement Self-calibration.........................................................................................12
Introduction to the Vertical System........................................................................................12
Introduction to the Horizontal System....................................................................................14
Introduction to the Trigger System.........................................................................................14
Touchscreen Controls...............................................................................................................15
How to Measure Automatically...............................................................................................20
How to Use Autoscale...............................................................................................................21
4. Communication with PC..........................................................................................22
Using USB Port.........................................................................................................................22
Using LAN Port........................................................................................................................23
Connect directly ..........................................................................................................................................23
Connect through a router..........................................................................................................................24
5. Use the Multimeter ..................................................................................................26
Input Terminals........................................................................................................................26
DMM Menu...............................................................................................................................27
DMM Information Window.....................................................................................................27
7. Appendix .................................................................................................................28
Appendix A: Enclosure............................................................................................................28
Appendix B: General Care and Cleaning...............................................................................29
Appendix C: USB Disk Requirements ....................................................................................30

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1. General Safety Requirements
Before use, please read the following safety precautions to avoid any possible bodily
injury and to prevent this product or any other connected products from damage. In
order to avoid any contingent danger, ensure this product is only used within the
range specified.
Only the qualified technicians can implement the maintenance.
To avoid Fire or Personal Injury:
Connect the probe correctly. The grounding end of the probe corresponds to the
grounding phase. Please don't connect the grounding end to the positive phase.
Use Proper Power Cord. Use only the power cord supplied with the product and
certified to use in your country.
Connect or Disconnect Correctly. When the probe or test lead is connected to a
voltage source, please do not connect and disconnect the probe or test lead at random.
Product Grounded. This instrument is grounded through the power cord grounding
conductor. To avoid electric shock, the grounding conductor must be grounded. The
product must be grounded properly before any connection with its input or output
terminal.
When powered by AC power, it is not allowed to measure AC power source
directly, because the testing ground and power cord ground conductor are
connected together, otherwise, it will cause short circuit.
When powered by battery, the product must ground connection. To avoid electric
shock, there must be a ground wire connect between ground and the ground port
(on the back of product panel).
Check all Terminal Ratings. To avoid fire or shock hazard, check all ratings and
markers of this product. Refer to the user's 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.
Use Proper Fuse. Use only the specified type and rating fuse for this instrument.
Avoid exposed circuit. Do not touch exposed junctions and components when the
instrument is powered.
Do not operate if in any doubt. If you suspect damage occurs to the instrument, have
it inspected by qualified service personnel before further operations.
Use your Oscilloscope in a well-ventilated area. Make sure the instrument installed
with proper ventilation, refer to the user manual for more details.
Do not operate in wet conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.

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2. Safety Terms and Symbols
Safety Terms
Terms in this manual. The following terms may appear in this manual:
Warning: Warning indicates the 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: It indicates an injury or hazard may immediately happen.
Warning: It indicates an injury or hazard may be accessible potentially.
Caution: It indicates a potential damage to the instrument or other property might occur.
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
To avoid body damage and prevent product and connected equipment damage, carefully
read the following safety information before using the test tool. This product can only be
used in the specified applications.
Warning:
The two channels of the oscilloscope are not electrically isolated. The channels should
adopt a common ground during measuring. To prevent short circuits, the 2 probe
grounds must not be connected to 2 different non-isolated DC levels.

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The diagram of the oscilloscope ground wire connection:
Ground Clip
Signal Input
Electrical Outlet
Probe Oscilloscope AC Adapter
The diagram of the ground wire connection when the battery-powered oscilloscope is
connected to theAC-powered PC through the ports:
Ground Clip
Signal Input
Oscilloscope
(Battery-power) PC Electrical OutletProbe
USB/LAN Cable
It is not allowed to measure AC power when the oscilloscope is AC powered, or when
the battery-powered oscilloscope is connected to the AC-powered PC through the
ports.
Warning:
To avoid fire or electrical shock, when the oscilloscope input signal
connected is more than 42V peak (30Vrms) or on circuits of more than
4800VA, please take note of below items:
Only use accessory insulated voltage probes and test lead.
Check the accessories such as probe before use and replace it if
there are any damages.
Remove probes, test leads and other accessories immediately after
use.
Remove USB cable which connects oscilloscope and computer.
Do not apply input voltages above the rating of the instrument
because the probe tip voltage will directly transmit to the
oscilloscope. Use with caution when the probe is set as 1:1.
Do not use exposed metal BNC or banana plug connectors.
Do not insert metal objects into connectors.

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3. Quick Start
Introduction to the Structure of the Oscilloscope
This chapter makes a simple description of the operation and function of the oscilloscope,
enabling you to be familiar with the use of the oscilloscope in the shortest time.
Front Panel
The front panel has knobs and function buttons. Through the function buttons, you can
enter different function menus or obtain a specific function application directly.
10
1 3
4
7
12 11
9
6
2
5
8
13
Figure 3-1 Front panel
1. LCD touchscreen
2. CH1 –CH2buttons: Access to setting menu of CH1 –CH2.
3. Power button: Power on/off
4. The Aknob:
When one of the CH1 –CH2buttons is lighted, this knob is used to adjust the vertical
position of current channel,
When HOR button is lighted, this knob is used to adjust the horizontal positions of all
channels (including mathematical operations).
When Trigger button is lighted, this knob is used to adjust trigger level.
5. HOR button: When the button light is off, press to light on, the Aand Bknob are for
horizontal system. Press to switch between the normal mode and the waveform

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zooming mode.
6. Trigger button: Accesses to trigger system setting. When the button light is on, the A
knob is used to adjust trigger level of current channel.
7. The Bknob:
When one of the CH1 –CH2buttons is lighted, this knob is used to adjust the voltage
scale of current channel.
When HOR button is lighted, this knob is used to adjust time base.
8. Copy button: You can save the waveform by just pushing this button in any user
interface. The source wave and the storage location are set in the Save menu when the
Type is Wave ( →Save).
9. Default button: Press this button, a prompt will show, press again to execute the
factory settings.
10. Autoset button: Quick way to apply a set of pre-set functions to the incoming signal,
and display the best possible viewing waveform of the signal.
11. Single button: Set the trigger mode as single directly.
12. Run/Stop button: Enable or disable sampling on input signals.
13. DMM button : Quickly On/Off DMM and measure parameter switch button.
Select: Switch between AC and DC when measuring voltage or current; and switch
resistance, continuity, diode, and capacitance measurement when selecting other.
Side Panel
1
2
3
4
5
6
Figure 3-2 Rear Panel
1. Probe Compensation: Measurement signal (5V/1kHz) output.
2. Trig Out or Pass/Fail output connector: Trigger signal output or Pass/Fail output. The
output type can be set on the menu ( →Utility →Function →Output →Output).
3. USB Device port: It is used to transfer data when external USB equipment connects to

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the oscilloscope regarded as "slave device". For example: to use this port when
connect PC to the oscilloscope by USB.
4. USB Host port: It is used to transfer data when external USB equipment connects to
the oscilloscope regarded as "host device". For example: Saving the waveform to USB
flash disk needs to use this port.
5. LAN port: the network port which can be used to connect with PC.
6. Connector for the DC power source via an AC-DC adapter
Top Panel
Channel input
Multimeter input
Figure 3-3 Top Panel Overview
User Interface Introduction
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15
28
25
6810 12
16
13
17
23
29
711
26
245
24
14
5
20
18
19
22
27
21
1
Figure 3-4 Illustrative Drawing of Display Interfaces
1. Waveform DisplayArea.
2. Run/Stop (touchable)
3. The state of trigger, including:

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Auto: Automatic mode and acquire waveform without triggering.
Trig: Trigger detected and acquire waveform.
Ready: Pre-triggered data captured and ready for a trigger. Click the to
force a trigger signal, which is mainly applied to the "Normal" and
"Single" trigger modes.
Scan: Capture and display the waveform continuously.
Stop: Data acquisition stopped.
4. Click to auto set.
5. The two blue dotted lines indicates the vertical position of cursor measurement.
6. The pointer indicates the trigger position in the record length.
7. The T pointer indicates the horizontal position for the trigger.
8. It shows present triggering value and displays the site of present window in
internal memory.
9. Touchable icon is to enable ( ) or disable ( ) the touchscreen controls.
10. It shows setting time.
11. Wi-Fi is activated.
12. It indicates that there is a USB disk connecting with the oscilloscope.
13. Indicating battery power status.
14. Multimeter window.
15. The waveform of CH1.
16. The pointer shows the trigger level position of the source in trigger menu.
17. The two blue dotted lines indicate the horizontal position of cursor measurement.
18. The waveform of CH2.
19. The frequency of the trigger signal.
20. The icon shows the selected trigger type, e.g. represents triggering on the
rising edge for an Edge trigger. The reading shows the trigger level value of the
corresponding channel.
21. Click to show/hide the touchable menu pane.
22. It indicates the measured type and value of the corresponding channel. "T" means
period, "F" means frequency, "V" means the average value, "Vp" the peak-peak
value, "Vr" the root-mean-square value, "Ma" the maximum amplitude value,
"Mi" the minimum amplitude value, "Vt" the Voltage value of the waveform's
flat top value, "Vb" the Voltage value of the waveform's flat base, "Va" the
amplitude value, "Os" the overshoot value, "Ps" the Preshoot value, "RT" the rise
time value, "FT" the fall time value, "PW" the +width value, "NW" the -Width
value, "+D" the +Duty value, "-D" the -Duty value, "WP" the Screen Duty,
"FRR" the FRR, "FRF" the FRF, "FFR" the FFR, "FFF" the FFF, "LRR" the,
"LRF" the LRF, "LFR" the LFR, "LFF" the LFF, "PD" the Delay A->B value,
"ND" the Delay A->B value, "TR" the Cycle RMS, "CR" the Cursor RMS,
"RP" the Phase A->B , "FP" the Phase A->B , "+PC" the +Pulse count, "-PC"
the - Pulse count, "+E" the Rise edge count, "-E" the Fall edge count, "AR" the
Area, "CA" the Cycle area.

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23. The readings show the record length.
24. The readings show current sample rate.
25. The readings indicate the corresponding Voltage Division of the channels.
"BW" indicates bandwidth limit.
The icon shows the coupling mode of the channel.
"—" indicates direct current coupling
"～" indicates AC coupling
" " indicates GND coupling
26. The reading shows the setting of main time base.
27. It is cursor measure window, showing the absolute values and the readings of the
cursors.
28. The blue pointer indicates the grounding datum point (zero point position) of the
waveform of the CH2 channel.
29. The yellow pointer indicates the grounding datum point (zero point position) of
the waveform of the CH1 channel.
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:
Enclosure" 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 theperformance 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, arepairing or replacement of the instrument
will be arranged by us.

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How to Implement the Function Inspection
Make a fast function check to verify the normal operation of the instrument, according
to the following steps:
1. Long press the button on the top right of the instrument.
The instrument carries out all self-check items and shows the Boot Logo. Push the
Default button on the front panel. The default attenuation coefficient set value of the
probe on the menu is 10X.
2. Set the Switch in the Oscilloscope Probe as 10X and Connect the Oscilloscope
with CH1 Channel.
Align the slot in the probe with the plug in the CH1 connector BNC, and then tighten
the probe with rotating it to the right side.
Connect the probe tip and the ground clamp to the connector of the probe
compensator.
3. Push theAutoset button on the front panel.
The square wave of 1 kHz frequency and 5V peak-peak value will be displayed in
several seconds (see Figure 3-5).
Figure 3-5 Auto set
Check CH2 by repeating Step 2 and Step 3.

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How to Implement the Probe Compensation
When connect the probe with any input channel for the first time, make this
adjustment to match the probe with the input channel. The probe which is not
compensated or presents a compensation deviation will result in the measuring error
or mistake. For adjusting the probe compensation, please carry out the following
steps:
1. Set the attenuation coefficient of the probe on the menu as 10X and that of the
switch in the probe as 10X (see "

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How to Set the Probe Attenuation Coefficient" on P11), and connect the
probe with the CH1 channel. If a probe hook tip is used, ensure that it keeps in
close touch with the probe. Connect the probe tip with the signal connector of the
probe compensator and connect the reference wire clamp with the ground wire
connector of the probe connector, and then push the Autoset button on the front
panel.
2. Check the displayed waveforms and regulate the probe till a correct
compensation is achieved (see Figure 3-6 and Figure 3-7).
Overcompensated Compensated correctly Under compensated
Figure 3-6 Displayed Waveforms of the Probe Compensation
3. Repeat the steps mentioned if needed.
Figure 3-7 Adjust Probe

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How to Set the Probe Attenuation Coefficient
The probe has several attenuation coefficients, which will influence the vertical scale
factor of the oscilloscope.
To change or check the probe attenuation coefficient on the menu of oscilloscope:
(1) Push the function menu button of the used channels (CH1 –CH2 button).
(2) Select Probe in the bottom menu; select Attenu in the right menu, select the
proper value corresponding to the probe in the left menu.
This setting will be valid all the time before it is changed again.
Caution:
The default attenuation coefficient of the probe on the instrument is preset to
10X.
Make sure that the set value of the attenuation switch in the probe is the
same as the menu selection of the probe attenuation coefficient in the
oscilloscope.
The set values of the probe switch are 1X and 10X (see Figure 3-8).
Figure 3-8 Attenuation Switch
Caution:
When the attenuation switch is set to 1X, the probe will limit the bandwidth
of the oscilloscope in 5MHz. To use the full bandwidth of the oscilloscope,
the switch must be set to 10X.
How to Use the Probe Safely
The safety guard ring around the probe body protects your finger against any electric
shock, shown as Figure 3-9.

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Figure 3-9 Finger Guard
Warning:
To avoid electric shock, always keep your finger behind the safety guard
ring of the probe during the operation.
To protect you from suffering from the electric shock, do not touch any
metal part of the probe tip when it is connected to the power supply.
Before making any measurements, always connect the probe to the
instrument and connect the ground terminal to the earth.
How to Implement Self-calibration
The self-calibration application can make the oscilloscope reach the optimum
condition rapidly to obtain the most accurate measurement value. You can carry out
this application program at any time. This program must be executed whenever the
change of ambient temperature is 5℃or over.
Before performing a self-calibration, disconnect all probes or wires from the input
connector. Click the icon, select the Utility softkey, select Function in the
bottom menu, select Adjust in the left menu, select Self Cal in the bottom menu; run
the program after everything is ready.
Introduction to the Vertical System
As shown in Figure 3-10, there are a few of buttons and knobs in Vertical Controls.
Press one of the channel buttons CH1, CH2 to open the corresponding channel menu,
and press again to turn off the channel.
If you want to set the vertical position and vertical scale of a channel, please press
CH1, CH2 at first to select the desired channel. Then turn the A or Bknob to set the
values.
Upper knob: adjust vertical position
When one of the
channel buttons is lit
Lower knob: adjust vertical scale
Figure 3-10 Vertical Control

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The following practices will gradually direct you to be familiar with the using of the
vertical setting.
1. Press CH1, CH2 panel button to select the desired channel.
2. When one of the channel buttons is lit, you can use the Aknob to show the selected
channel waveform in the center of the waveform window. The Aknob functions the
regulating of the vertical display position of the selected channel waveform. Thus,
when the Aknob is rotated, the pointer of the earth datum point of the selected
channel is directed to move up and down following the waveform, and the position
message at the center of the screen would change accordingly.
Measuring Skill
If the channel is under the DC coupling mode, you can rapidly measure the DC
component of the signal through the observation of the difference between the wave
form and the signal ground.
If the channel is under the AC mode, the DC component would be filtered out. This
mode helps you display the AC component of the signal with a higher sensitivity.
Vertical offset back to 0 shortcut key
Turn the Aknob to change the vertical display position of the selected channel, and
push the Aknob to set the vertical display position back to 0 as a shortcut key, this is
especially helpful when the trace position is far out of the screen and want it to get
back to the screen center immediately.
3. Change the Vertical Setting and Observe the Consequent State Information Change.
With the information displayed in the status bar at the bottom of the waveform
window, you can determine any changes in the channel vertical scale factor.
Turn the Bknob and change the "Vertical Scale Factor (Voltage Division)" of the
selected channel, it can be found that the scale factor of the selected channel in the
status bar has been changed accordingly.

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Introduction to the Horizontal System
Shown as Figure 3-11, there are a button and two knobs in the Horizontal Controls.
The following practices will gradually direct you to be familiar with the setting of
horizontal time base.
Upper knob: adjust horizontal position
When the HOR
button is lit
Lower knob: adjust horizontal scale
Figure 3-11 Horizontal Control
1. When the HOR button is lit, push the HOR button to switch between the normal
mode and the wave zoom mode.
2. When the HOR button is lit, turn the B knob to change the horizontal time base
setting and observe the consequent status information change. Turn the Bknob to
change the horizontal time base, and it can be found that the Horizontal Time
Base displayed in the status bar changes accordingly.
3. When the HOR button is lit, use the A knob to adjust the horizontal position of
the signal in the waveform window. The A knob is used to control the triggering
displacement of the signal or for other special applications. If it is applied to
triggering the displacement, it can be observed that the waveform moves
horizontally with the knob when you rotate the Aknob.
Triggering displacement back to 0 shortcut key
Turn the Aknob to change the horizontal position of channel and push the A
knob to set the triggering displacement back to 0 as a shortcut key.
Introduction to the Trigger System
As shown in Figure 3-12, there are one knob and one button make up Trigger
Controls. The following practices will direct you to be familiar with the setting of the
trigger system gradually.

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Upper knob: adjust trigger level
When the Trigger button is lit
Figure 3-12 Trigger Control Zone
1. Click the icon on the right bottom of the display area, click Trig Menu to
call out the trigger menu in the bottom. The trigger setting can be changed.
2. When the Trigger button is lit, use the A knob to change the trigger level setting.
By turning the Aknob, the trigger indicator in the screen will move up and down.
With the movement of the trigger indicator, it can be observed that the trigger
level value displayed in the screen changes accordingly.
Note: Turning the Aknob can change trigger level value and it is also the hotkey
to set trigger level as the vertical mid point values of the amplitude of the trigger
signal.
3. Click the on the left top of the display area to force a trigger signal,
which is mainly applied to the "Normal" and "Single" trigger modes.
Touchscreen Controls
You can control the oscilloscope by different gestures. The touchable icon at the top right
of the screen is used to enable ( ) or disable ( ) the touchscreen controls.
The instruction of touchscreen controls is as below.
Run/Stop: Click the or on the left top of the display area to run or stop the
waveform sampling.
Force trigger: Click the on the left top of the display area to force a trigger
signal, which is mainly applied to the "Normal" and "Single" trigger modes.
Autoset: Click the on the left top of the display area to auto set.
Select a menu item: Touch the menu items in the bottom menu, or in the right menu,
or in the left menu.
Switch menu items: If there are options that can be switched on the menu, you can
repeatedly touch the area of the menu item to switch, or push the corresponding
button to switch. See figure below:

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Press repeatedly to
switch the options
Adjust value on the menu item:
Click to increase the
value of cursor position
Move the cursor
Click to decrease the
value of cursor position
Scroll the list: If there is a scroll bar in the left menu, you can swipe up and down to
scroll the list.
Touchable menu pane: Click the icon on the right bottom of the display area, a
menu will be shown. Click to enter the corresponding function menu.
When OFF is shown, click to turn on the function, and enter the menu.
When ON is shown and unselected, click to enter the menu, click again to turn off.
Set the channel status: Click the channel on the left bottom of the display area, you
can turn on, select or turn off the channel. You can also touch the channel pointer on
the left side of the display area to make it in selected state.

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Channel is off
Channel is on and selected
Selected Unselected
Channel pointer
Set the horizontal and vertical position
Click in the area as shown in the figure below, the Picon will appear. Click anywhere
outside the icon to hide it.
Note: Swipe up/down or left/right in this area, you can make the icon appear and
control it.
When the Picon appears, in the full screen, swipe left/right to control the horizontal
position, swipe up/down to control the vertical position of the selected channel.
Control the
horizontal position Control the vertical position
of the selected channel
Click the Picon to fine-turn, long-press to adjust continuously.