multicomp pro HDS-N Series User manual

i
Handheld Storage Oscilloscope
Model MP720014 and MP720015

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Table of Contents
1.2 PACKAGE CONTENTS ·················································· 5
2. SAFETY INFORMATION·················································· 6
2.1 Safety Symbols and Terms·············································································· 6
2.1.1 Safety Symbols ····················································································· 6
2.1.2 Safety Terms························································································· 6
2.2 General Safety Information ············································································ 6
3. GENERAL CHARACTERISTICS······································· 9
4. PERFORMING THE GENERAL INSPECTION ··················· 10
4.1 Performing the General Inspection ··································································10
4.1.1 Check whether there is any Damage on it Due to Transportation····················10
4.1.2 Make a Check on Accessories·································································10
4.1.3 Make a Check on the Complete Instrument················································10
5. INPUT CONNECTIONS ··················································11
5.1 Input Connections ·······················································································11
5.1.1 Input connections ····················································································11
5.1.2 The connection of 1 kHz/5 V Square-wave test signal ·········································12
5.2 Front Panel and Keys Overview ······································································12
6. USING THE OSCILLOSCOPE ········································ 15
6.1 About this Chapter ······················································································15
6.2 Powering Up the Oscilloscope·········································································15
6.3 Oscilloscope Operation Window······································································15
6.4 Menu Description ························································································17
6.5 Manually Setting the Vertical System, Horizontal System and Trigger Position ··········17
6.5.1 Setting the Vertical System·········································································17
6.5.2 Setting the Horizontal System and Trigger Position ············································18
6.6 Recall factory settings···················································································19
6.7 Input Connections ·······················································································20
6.8 Displaying an Unknown Signal with Auto Set ·····················································20
6.9 Automatic Zero-returning of Trigger Horizontal Position and Trigger Level Position ··21
6.10 Automatic Measurements ············································································21
6.11 Freezing the Screen ····················································································22
6.12 Using Average for Smoothing Waveforms························································22

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6.13 Using Persistence to Display Waveforms··························································23
6.14 Using Peak Detection to Display Glitches ·························································24
6.15 Selecting AC-coupling ·················································································25
6.16 Reversing the Polarity of the Displayed Waveform·············································26
6.17 Use USB mass storage device to save waveform data··················································26
7. USING THE MULTIMETER ············································ 32
7.1 About this Chapter ······················································································32
7.2 Making Meter Connections············································································32
7.3 Multimeter Operation Window ·······································································32
7.4 Making Multimeter Measurements ··································································33
7.4.1 Measuring Resistance Values ·································································33
7.4.2 Measuring Diode ··················································································34
7.4.3 On-o ff Te st ··························································································35
7.4.4 Measuring Capacitance ·········································································35
7.4.5 Measuring DC Voltage ···········································································36
7.4.6 Measuring AC Voltage ···········································································37
7.4.7 Measuring DC Current ···········································································38
7.4.8 Measuring AC Current ···········································································39
7.5 Freezing the Readings···················································································40
7.6 Taking a Relative Measurement ······································································41
7.7 Selecting Automatic/ManualRange Adjustment ··················································42
8. ADVANCED FUNCTION OF OSCILLOSCOPE ·················· 43
8.1 About this Chapter ······················································································43
8.2 Setting the Vertical Channel···········································································43
8.2.1 Setting the Channel Coupling··································································44
8.2.2 Open and Close Settings on Channel ·······················································45
8.2.3 Setting the probe attenuation ··································································45
8.2.4 Setting of Inverted Waveform ··································································46
8.3 Setting the Trigger System ·············································································46
8.4 Triggering Control·······················································································46
8.4.1 Edge Trigger························································································47
8.4.2 Video Trigger ·······················································································47
8.5 Setting the Acquiring Mode············································································50
8.6 Display Setting····························································································50
8.6.1 Display Style························································································51
8.6.2 Persistence ·························································································51
8.6.3 Cymometer··························································································51
8.7 Waveform Saving Setups···············································································52
8.7.1 Waveform Saving Setups in normal mode ·······················································52
8.7.2 Waveform Saving Setups in FFT mode···························································53
8.8 Function Setting Menu ·················································································54

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8.9 Making Automatic Measurements ···································································55
8.10 Setting the Cursor Measurements ··································································56
8.10.1 Setting the cursor measurement in normal mode ··············································56
8.10.2 Setting the cursor measurement in FFT mode··················································59
8.11 Autoscale ·································································································60
8.12 Record ····································································································61
8.13 Using FFT································································································64
8.14 System State Menu ·····················································································70
8.14.1 Real time clock ···················································································71
8.15 Setting of Time Base Mode ···········································································71
8.16 Data Transmission······················································································73
9. TROUBLE SHOOTING·················································· 75
10. APPENDIX ································································ 76
10.1 Appendix A: Specifications ···········································································76
10.1.1 Oscilloscope ······················································································76
10.1.2 Meter································································································78
10.1.3 General Specifications ·········································································80
10.2 Appendix B: Maintenance and Cleaning ··························································81
10.2.1 Maintenance ······················································································81
10.2.2 Storage of Oscilloscope········································································81
10.2.3 Replacing the Lithium Battery Unit··························································82

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1.2 Package Contents
See the picture below. This picture is only for your reference. If any discrepancy
found between certain picture and product, please look the actual product.
# Description Standard Optional
1 Oscilloscope and Battery ●
2 AC-DC adapter ●
3 Oscilloscope Probe × 1 (grey) ●
4
Multimeter test lead ×2 (black and red)
●
5
USB Mass Storage connect cable
●
6 Extension module for capacitance measurement ●
7
Probe adjustment tools
●
8
USB communication cable or RS-232C communication cable
●
9 User Manual ●
10 CD-ROM (software) ●
11 Metal carrying case ●
12 Soft carrying case ●
13 The output terminal of 1 kHz 5 V square-wave test signal ●
Figure 1: Digital Oscilloscope Parts

2-Safety information
6
2. Safety Information
In order to ensure the correct using and the best efficient service, please carefully read this user's
manual.
2.1 Safety Symbols and Terms
2.1.1 Safety Symbols
These symbols may appear in this manual or on the instrument.
Warning: "Warning" identifies conditions and actions that pose hazards to the users.
Caution: "Caution" identifies conditions and actions that may damage the product or
other properties.
2.1.2 Safety Terms
The following terms may appear on the instrument:
Danger: The term "Danger" is used in this manual to indicate that when you read this
mark, personal injury may be caused to you immediately.
Warning: The term "Warning" is used in this manual to indicate that when you read this
mark, personal injury may not be caused to you immediately, but you need to
be cautionary.
Notice: The term "Notice" is used in this manual to indicate that damages may be
caused on this product or other properties.
2.2 General Safety Information
Carefully read the following safety information in order to avoid any personal injury and damage
on this product or any products connected with it. This product can only be used in the specified
applications to prevent any possible dangers.
DANGER:
High Voltage
Refer to the
Manual
Protective
Conductor
Terminal
Chassis
Ground
Earth (ground)
Terminal

2-Safety information
7
Warning:
To avoid fire or electrical shock, please use proper power adapter. Use only the power
adapter appointed by the manufacturer and subject to approval of being used in the user's
country.
Warning:
The two channels of the oscilloscope are non-isolated electrically. The channels should adopt
common basis during measuring. To prevent short circuits, the 2 probe ground must not be
connected to 2 different non-isolated DC level.
Warning:
The channels should adopt common basis during measuring. To prevent short circuits, the 2
probe ground must not be connected to 2 different non-isolated DC level.
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 the AC-powered PC through the ports:
Ground Clip
Signal Input
Oscilloscope
(Battery-power) PC Electrical Outlet
Probe
USB/COM Cable
Itis not allowed to measure AC power when the oscilloscope is AC powered through the
adapter, or when the battery-powered oscilloscope is connected to the AC-powered PC
through the ports.
Warning:
To avoid fire or electrical shock if a test tool input is connected to more 42V peak (30Vrms)
or on circuits of more than 4800VA:
●Use only insulated voltage probes, test leads and adapter supplied with the test tool, or
indicated as suitable for the Oscilloscope & Multimeter.
●Before use, inspect voltage probes, test leads and accessories for mechanical damage and
replace when damaged.
●Remove all probes, test leads and accessories that are not in use.

2-Safety information
8
●Always connect the power adapter first to the AC outlet before connecting it to the
Oscilloscope & Multimeter.
●Do not apply voltages that differ more than 400 V from earth ground to any input when
measuring in a CAT
Ⅱ
environment.
●Do not apply voltages that differ more than 400 V from each other to the isolated inputs
when measuring in a CAT
Ⅱ
environment.
●Do not apply input voltages above the rating of the instrument Use caution when using
1:1 test leads because the probe tip voltage will be directly transmitted to the
Oscilloscope & Multimeter.
●Do not use exposed metal BNC or banana plug connectors.
●Do not insert metal objects into connectors.
●Always use the Oscilloscope & Multimeter only in the manner specified.
●Voltage ratings that are mentioned in the warning are giver as limits for "working
voltage". The represent V ac rms (50-60Hz) for AC sine wave applications and as V dc
for DC applications. Overvoltage Category
Ⅱ
refers to local level , which is applicable
for appliances and portable equipment .
Only qualified technical personnel are permitted to perform maintenance.
Pay attention to the nominal values of all terminals: To avoid fire or electric shock, please keep
a watchful eye on all nominal values and marks specified for this product. Before any connection
performed on this product, carefully read the user's manual of the product for further information
of nominal values.
No operation is allowed without the instrument cover plate: If the cover plate or panel has
been removed, do not perform any operation on this product.
No touch is allowed on bare conductors: When the product is powered on, do not touch any bare
joints or parts of the scope meter.
Operation is prohibited in case of any undetermined failure: When in doubt any damage on
this product, consult the qualified personnel for checking on it.
Keep ventilation in good condition: Refer to the user manual for detail installation instructions
in order to fix this product correctly and provide it with good ventilation conditions.
No operation is allowed under a humid environment.
No operation is allowed under an explosive environment.
Keep clean and dry on the product surface.
Using the Oscilloscope & Multimeter in a manner not specified may impair the protection
provided by the equipment.

3-General Characteristics
9
3. General Characteristics
Oscilloscope
2 in 1 (Multimeter function support);
Record length of 6,000 points for each channel;
Reading-out with the cursor;
Eighteen automatic measurement functions;
Autoscale function;
Colour liquid crystal display of high resolution and high contrast with
adjustable back light;
Storage and call-out of waveforms;
Automatic setting function provided capable of fast setting;
FFT function
Implementation of detecting the average and peak values of the waveform;
Edge and video triggering function;
RS232 or USB communication ports;
Multiple Language User Interface.
Multimeter
3 and 3/4 digits;
Volts, Amps, Ohms, Diode, Capacitance, Continuity measurement;
10A maximum amplitude;
Isolated inputs between oscilloscope and multimeter.

4-Performing the General Inspection
10
4. Performing the General Inspection
4.1 Performing the General Inspection
When you have got a new oscilloscope, it is suggested that you should perform a general
inspection on the instrument according to the following steps.
4.1.1 Check whether there is any Damage on it Due to Transportation
If the packing boxes or foam cushions are found to have serious damage, keep them in a safe place
until the complete instrument and accessories have passed the electrical and mechanical tests.
4.1.2 Check the Accessories
Check that all the parts and accessories are included and in serviceable condition.
4.1.3 Check the Complete Instrument
If the instrument is damaged in its appearance or it fails in normal operation or performance test,
do not use it and contact the supplier directly.

5-Input Connections
11
5. Input Connections
5.1 Input Connections
5.1.1 Input connections
See the following Figure 2:
Figure 2：Input connections
Description:
1. The power adapter is supplied for AC power supply and battery recharging.
2. Multimeter test lead.
3. Multimeter input jacks, including four circular banana jacks. The first jack measuring the
current 2A-10A, the second jack on the current Measurement, the third COM ground input,
and the fourth measuring voltage, resistance, Capacitance input.
4. Oscilloscope probe.
5. Oscilloscope channel input.
6. The output terminal of 1kHz/5V square-wave test signal.

5-Input Connections
12
5.1.2 The connection of 1 kHz/5 V Square-wave test signal
At the left side of the oscilloscope, it is a port for testing 1 kHz/5 V square-wave
signal which is used to adjust the probe, shown as Fig.3
Fig.3. The connection of Square-wave test signal
5.2 Front Panel and Keys Overview
See the following Figure 4:

5-Input Connections
13
Figure 4：Front Panel
Description:
1. AC adapter Port
2. RS-232C Port.
3. USB Port.
4. USB Mass Storage Port.
5. Power switch.
6. F1 - F5: Switch or Adjust options for each menu.

5-Input Connections
14
7. AUTO SET: Under DSO mode, automatically selects the horizontal scales, vertical scale, and
trigger level according to the input signal.
8. COPY: Press to save the waveform data into the USB Mass Storage Device.
9. ▲(red): Adjust vertical position in Channel.
10. VERTICAL ZERO (red): Adjust vertical position to zero.
11. ▼(red): Adjust vertical position.
12. (red): Adjust voltage scale.
13. CHANNEL SETTING (red): Enter Channel settings directly.
14. (red): Adjust voltage scale.
15. RUN/STOP: key for running or stopping the operation
16. LIGHT: backlight control.
17. DMM/OSC: Operation mode switching key between oscilloscope and multimeter.
18. MENU ▲: Choose the upper item on the menu list.
19. MENU: Show / Hide the menu
20. MENU ▼: Choose the lower item on the menu list.
21. OPTION: the key for DSO setting and combines with four arrow keys. Then to set main time
base, trigger horizontal position and trigger vertical position. Furthermore adjust cursor 1 (V1
or T1) and cursor 2 (V2 or T2) position during cursor measurement.
22. ▲ (OPTION): Oscilloscope display upward adjustment key.
23. ▼ (OPTION): Oscilloscope display downward adjustment key.
24. ►(OPTION): Oscilloscope right-direction adjustment key.
25. ◄(OPTION): Oscilloscope left-direction adjustment key.
26. A: Selects DMM current measurement
27. V: Selects DMM voltage measurement
28. R: Selects DMM impedance, diode, continuity and capacitance measurement
29. SET: convert AC and DC during measure current or voltage in Multi-meter; convert
resistance, diode, on-off and capacitance measure during resistance measuring.

6-Using the Oscilloscope
15
6. Using the Oscilloscope
6.1 About this Chapter
This chapter provides a step-by-step introduction to the scope functions. The introduction does not
cover all of the capabilities of the scope functions but gives basic examples to show how to use the
menus and perform basic operations.
6.2 Powering Up the Oscilloscope
Connect oscilloscope to AC power via AC-DC adapter as shown in Figure 1. (The oscilloscope
may still work with built-in Li-ion battery even without AC power supply).
Turn the oscilloscope on by pressing down the power on/off key .
The instrument then performs self checking after power on. A greeting window and a sentence
"Press any key to continue." will display on the screen when the system finishes self checking.
The users can press any key to enter the measuring function.
The oscilloscope is powered up in its last setup configuration.
6.3 Oscilloscope Operation Window
See the following figure 5:
Figure 5: Oscilloscope Operation Window

6-Using the Oscilloscope
16
Description:
1. Battery electric quantity indicating symbols.
2. Auto measurement window 1, in which "F "means frequency, "T" means cycle, "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.
3. Auto measurement window 2.
4. The pointer indicates the horizontal triggering position.
5. This reading gives the Time Difference between the horizontal triggering position and the
screen centerline. It reads zero when the pointer is in the center of the screen.
6. The trigger state indicates the following information.
Auto: The oscilloscope is working in the automatic mode and displaying the waveform
under the non-trigger state.
Trig'd: The oscilloscope has detected a trigger and collecting the information generated
after the trigger.
Ready: All pre-triggered data have been captured and the oscilloscope has been ready to
receive trigger signals.
Scan: The oscilloscope can gather and display the waveform data continuously in scanning
mode.
Stop: The oscilloscope has stopped collecting the waveform data.
7. Green pointer indicates vertical trigger position when edge trigger, and no green pointer
when video trigger.
8. A hidden-style menu: With the MENU key pressed, you can view or hide the menu.
9. Menu setting options: There are different setting options for different menus.
10. It reads the value of trigger voltage level.
11. The reading gives the value of primary time base.
These graphics present the coupling modes of channel . The graphic "～" indicates AC, the
graphic "－" indicates DC, the graphic " " indicates GND.
12. This reading shows the vertical Voltage Unit Scale of channel.
13. The red pointer gives the grounding datum point of the waveform on channel, which is the
zero position of channel. No pointer display indicates the channel has not been opened.

6-Using the Oscilloscope
17
14. OPTION operation prompt: There are different prompts for different OPTION operations.
15. Waveform display area, and the wave shows red.
6.4 Menu Description
The following example shows how to use the tool's menus to select a function, as shown in the
following figure.
1. Press the MENU key to display the Function Menu on the right of the screen and the
corresponding optional settings on the bottom. Press MENU again will hide the Function
Menu.
2. Press the MENU ▲or MENU ▼key to select different function menus.
3. Choose one key from F1 to F5 and press it to change function setting.
See the following figure 6:
Figure 6: the Tool's Menus
6.5 Manually Setting the Vertical System, Horizontal System
and Trigger Position
6.5.1 Setting the Vertical System
To set the vertical position of channel:
(1) The key ▲ (red) and ▼(red) can be used to adjust the vertical position of channel; the
relevant information will be displayed at the left bottom of the screen.
(2) The key (red) and (red) can be used to adjust the voltage scale of channel; the
relevant information will be displayed at the left bottom of the screen.
Note: Press VERTICAL ZERO (red) key to set the vertical position of channel to zero.

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6.5.2 Setting the Horizontal System and Trigger Position
OPTION key is a multiple setting key to set trigger vertical position, main time base and
horizontal position (trigger horizontal position) during edge trigger and video trigger.
The following example shows how to use OPTION key to make a setting.
The following guidance is for the operation on the mode of edge triggering and video
triggering.
1. Press once the OPTION key; the following is displayed at the bottom left side of the screen,
as shown in the figure below.
◄/►– Time Base
▲/▼– Trig
See the following figure 7:
Figure 7
2. Press ◄(OPTION) or ►(OPTION) to adjust the main time base; press ▲(OPTION) or▼
(OPTION) to adjust trigger level position, press Rkey to "zero" the trigger level position.
3. Press OPTION again and left bottom side display as
◄/►– Time
▲/▼–Trig
See the following figure 8:

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19
Figure 8
4. Press ◄(OPTION)or ►(OPTION) to adjust time base horizontal position, press Vkey to
"zero" the horizontal position; press ▲(OPTION)or ▼(OPTION)to adjust trigger level
position, press Rkey to "zero" the trigger level position.
5. Press OPTION again to back up operation 1.
Term interpretation
Vertical scale factor: It stands for the voltage amplitude represented by a division in the
vertical direction of the display area, through the adjustment of which you can amplify or
attenuate the signal and thus regulate the signal amplitude into the expected measurement
range.
Vertical zero position: It is referred to as the grounding datum point, through the adjustment
of which you can regulate the display position of the waveform on the screen.
Main time base: It means the time values represented by a division in the horizontal direction
of the display area.
Trigger horizontal position: It means the time deviation between the actual trigger point and
the screen central line, which will be displayed as 0 at the center point of the screen.
Trigger level position: It represents the voltage deviation between the actual trigger level and
the zero position of the triggering signal source channel.
6.6 Recall factory settings
If you want to reset the Oscilloscope to the factory settings, do the following:
1. Press MENU key and the function menu appears on the right side of the screen
2. Press the MENU ▲or MENU ▼key to select FUNCTION setting and three options are
visible at the bottom of the screen.

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20
3. Press F1 key to select "Recall Factory" to recall the factory settings.
4. Press F2 key to select "Auto calibration". If the ambient temperature variation is up to or
larger than 5 Celsius degree, the Auto calibration function should be performed. But this will
not affect the using and capability by the heat from LCD and electronic component
See the following Figure 9:
Figure 9: Reset the Oscilloscope
6.7 Input Connections
See Figure 2 on P11.
Look at the bottom and the right of the Oscilloscope. The Oscilloscope has six signal inputs: one
safety BNC jack inputs (CH) for scope measurements, four safety 4-mm banana jack inputs for
Multimeter R, V and A measurements.
Isolated input allows independent floating measurements between Multimeters and Scopes.
6.8 Displaying an Unknown Signal with Auto Set
The Auto-Set feature lets the Oscilloscope display and measure unknown signals automatically.
This function optimizes the position, range, time base and triggering, assures a stable display of
virtually any waveform. This feature is especially useful for quickly checking several signals.
To enable the Auto-Set feature, do the following:
1. Connect the test probe to the tested signals.
2. Press the AUTO SET key and the Oscilloscope is under the automatic measurement
condition. The tested signals appear on the screen.