Digimess HS 60 Oscilloscope and Multimeter User’s Manual

digimess
®
HS60
Handheld Digital Storage
Oscilloscope & Multimeter
User’s Manual
1
digimess Handheld DSO & DMM
Contents
Table of Contents
Chapter
Page
1. DECLARATION OF CONFORMITY················································· 1
1.1 Declaration of Conformity ······················································································1
2. SAFETY INFORMATION···································································· 2
2.1 Safety Terms and Symbols·······················································································2
2.1.1 Specific Warning and Caution Terms that Appear throughout the Manual ··············2
2.1.2 Terms Used on the Product···························································································2
2.1.3 Symbols Used on the Product. ·····················································································2
2.2 General Safety Information ····················································································3
3. PERFORMING THE GENERAL INSPECTION ····························· 5
3.1 Performing the General Inspection ···································································5
3.3.1 Check whether there is any Damage on it Due to Transportation····························5
3.3.2 Make a Check on Accessories ·····················································································5
3.3.3 Make a Check on the Complete Instrument································································5
4. INPUT CONNECTIONS ······································································ 6
4.1 Input Connections ········································································································6
4.2 Description for the Front Panel and Keys ·····················································7
5. USING THE SCOPE············································································ 9
5.1 About this Chapter ·······································································································9
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5.2 Power-Up the Oscilloscope ······················································································9
5.3 Oscilloscope Operation Window··········································································9
5.4 Navigating a Menu ····································································································· 11
5.5 Manually Setting the Vertical System, Horizontal System and
Trigger Position ····················································································································12
5.6 Resetting the Oscilloscope······················································································15
5.7 Input Connections ······································································································16
5.8 Displaying an Unknown Signal with Auto Set···········································16
5.9 Automatic Zero-returning of Trigger Horizontal Position and
Trigger Level Position ······································································································17
5.10 Automatic Measurements ····················································································17
5.11 Freezing the Screen··································································································18
5.12 Using Average for Smoothing Waveforms ················································19
5.13 Using Persistence to Display Waveforms ···················································19
5.14 Using Peak Detection to Display Glitches ·················································20
5.15 Selecting AC-coupling····························································································22
5.16 Reversing the Polarity of the Displayed Waveform ····························22
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5.17 Using Waveform Mathematics Functions ·················································23
6. USING THE MULTIMETER······························································ 25
6.1 About this Chapter ·····································································································25
6.2 Making Meter Connections ··················································································25
6.3 Multimeter Operation Window ··········································································25
6.4 Making Multimeter Measurements ·································································26
6.4.1 Measuring Resistance Values ····················································································27
6.4.2 Making a Diode Measurement····················································································27
6.4.3 On-off Test·····················································································································28
6.4.4 Making a Capacitance Measurement ········································································29
6.4.5 Making a DC Voltage Measurement ··········································································30
6.4.6 Making a AC Voltage Measurement···········································································31
6.4.7 Making a DC Current Measurement ··········································································32
6.4.8 Making an AC Current Measurement ········································································34
6.5 Freezing the Readings ······························································································36
6.6 Taking a Relative Measurement·········································································37
6.7 Selecting Automatic/Manual Range Adjustment ····································37
7. ADVANCED FUNCTION OF OSCILLOSCOPE ······················３９
7.1 About this Chapter ·································································································３９
7.2 Setting the Vertical CH1 and CH2 ·······························································３９
7.2.1 Setting the Channel Coupling ·················································································４０
7.2.2 Make Open and Close Settings on Channel·························································４１
7.2.3 Adjusting the Probe Scale ·······················································································４１
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7.2.4 Setting of Inverted Waveform ·················································································４１
7.3 Make the Math Function Menu Setting ····················································４２
7.4 Setting the Trigger System·················································································４３
7.5 Triggering Control··································································································４４
7.5.1 Edge Triggering ········································································································４４
7.5.2 Video Triggering ·······································································································４５
7.6 Acquiring Mode Setting ······················································································４７
7.7 Display Setting ··········································································································４７
7.7.1 Display Style ·············································································································４７
7.7.2 Persistence ···············································································································４８
7.7.3 XY Mode····················································································································４９
7.8 Waveform Saving Setups ····················································································４９
7.9 Function Setting Menu ························································································５０
7.10 Making Automatic Measurements ·····························································５１
7.11 Setting the Cursor Measurements ······························································５２
7.12 System State Menu ······························································································５４
7.13 Setting of Time Base Mode ·············································································５５
7.14 Data Transmission ·······························································································５６
8. TROUBLE SHOOTING····································································· 58
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9. APPENDIX··························································································· 60
9.1 Appendix a Specifications ······················································································60
9.1.1 Oscilloscope··················································································································60
9.1.2 Meter······························································································································62
9.1.3 General Specifications·································································································63
9.2 Appendix B: Maintenance and Cleaning ······················································64
9.2.1 Common Maintenance ································································································64
9.2.2 Storage of Oscilloscope·······························································································64
9.2.3 Replacing the Lithium Battery Unit·············································································65
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digimess Handheld DSO & DMM
1-Declaration of Conformity
1. Declaration of Conformity
1.1 Declaration of Conformity
HS60 Handheld Digital Storage Oscilloscope & Multimeter
Statement of Conformity
Base on the result using appropriate standards, the product is in conformity with
Electromagnetic Compatibility Directive 89/336/EEC
Low Voltage Directive 73/23/EEC
Sample tests
Standards used:
EN61010.1：2001（2nd edition）
Safety Requirements for Electrical Equipment for Measurement, Control, and
Laboratory use-part 1: General Requirements
EN61326：1997+A1：1998+A2：2001+A3：2003
Electrical Equipment for Measurement, Control and Laboratory use-EMC
Requirements-part 1. General Requirements
EN61000-3-2：2000+A2：2005
Electromagnetic Compatibility (EMC)-part 3: Limits-Section 2: Limits for Harmonic
Current Emissions (Equipment Input Current less than/equal to 16A per phase)
EN61000-3-3：1995+A1：2001
Electromagnetic Compatibility (EMC)-part 3: Limits-Section 3 Limitation of Voltage
Fluctuations and Flicker in Low-Voltage Supply systems for Equipment with Rated
Current less than or equal to 16A
The tests have been performed in typical configuration.
This conformity is indicated by the symbol CE, i.e." Conformité European ".
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1-Declaration of Conformity
1.2 The following Parts are included in the Oscilloscope box.
Refer to figure 1:
#
1
2
3
4
5
6
7
8
9
10
11
12
Description
Scope meter Test Tool
Battery Charger
two Oscilloscope Probes (grey)
a pair of Test Leads of Multimeter (black and red)
a Measuring Extension Module for Big Current
a Measuring Module for Small Capacitance
a Adjustment Tool of Oscilloscope Probe
a piece of Serial-port Data Transmission Line or a
Piece of USB Data Transmission Line
a User’s Manual
an Operational Optical Disk (include the
transmission software between oscilloscope and
pc)
a Hard Carrying Case
a Soft Carrying Case
Standard
●
●
●
●
●
●
●
●
●
●
●
●
digimess
figure 1: Digital Oscilloscope Parts
1
Optional
digimess Handheld DSO & DMM
3-Performing the General Inspection
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 Terms and Symbols
2.1.1 Specific Warning and Caution Terms that Appear throughout the
Manual
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 Terms Used on the Product
The following terms appears possibly on the product:
Danger:
Warning:
Notice:
The term “Danger” is used in this manual to indicate that when you read this
mark, personal injury may be caused to you immediately.
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.
The term “Notice” is used in this manual to indicate that damages may be
caused on this product or other properties.
2.1.3 Symbols Used on the Product.
The following symbols appear possibly on the product.
High voltage
Refer to user
manual
Protective
ground
2
Measurement
ground
Casing ground
digimess Handheld DSO & DMM
3-Performing the General Inspection
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.
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:
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 by digimess 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.
● 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 Ⅲ environment.
● 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 input
when measuring in a CAT Ⅲ 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
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3-Performing the General Inspection
DC applications. Over voltage Category Ⅲ refers to distribution level and fixed
installation circuits inside a building. Over voltage 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.
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3-Performing the General Inspection
3. Performing the General Inspection
3.1 Performing the General Inspection
When you have got a new HS series oscilloscope, it is suggested that you should perform a general
inspection on the instrument according to the following steps.
3.3.1 Check whether there is any Damage Due to Transportation
If the packing boxes or foam cushions are found in serous damage, keep them in a proper place till
the complete instrument and accessories have passed the electrical and mechanical tests.
3.3.2 Check the Accessories
The accessory list has been described in the picture of Digital Oscilloscope Parts of this manual.
You can make a check and find whether there is any accessory loss with reference to the Appendix.
In case of any accessory loss or damage, consult the DIGIMESS dealer responsible for such a
business or the local office of DIGIMESS.
3.3.3 Check the Complete Instrument
If the instrument is damaged in its appearance or it fails in normal operation or performance test,
consult the DIGIMESS dealer responsible for such a business or the local office of DIGIMESS. If
the instrument is damaged due to transportation, keep the packing in a proper place and consult the
transportation department and the DIGIMESS dealer responsible for such business, who will
provide
an
instrument
replacement
or
maintenance.
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digimess Handheld DSO & DMM
4-Input Connections
4. Input Connections
4.1 Input Connections
Refer to figure 2
figure 2
Description:
1. The power adapter is supplied for AC power supply and battery recharging.
2. Multimeter test lead.
3. Multimeter input jacks, including three circular banana jacks and tow square jacks. The three
circular jacks are used for voltage, current and resistance inputs, while the two square jacks are
used for capacitance inputs.
4. Oscilloscope probes.
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digimess Handheld DSO & DMM
4-Input Connections
5. Oscilloscope channel inputs: the upper one is for Channel 1 (CH1), while the lower one is for
Channel 2 (CH2).
4.2 Description for the Front Panel and Keys
Refer to figure 3
digimess HS60
figure 3
Description:
1. Power adapter jack.
2. Serial port.
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digimess Handheld DSO & DMM
4-Input Connections
3. USB jack.
4. Backlight switch.
5. POWER: Power switch.
6. A: Multimeter current measurement key.
7. V: Multimeter voltage measurement key.
8. R: Multimeter resistance, triode, On/Off and capacitance measurement key.
9. OSC ◄: Oscilloscope left-direction adjustment key.
10. OSC ►: Oscilloscope right-direction adjustment key.
11. OSC OPTION: Oscilloscope setting key.
z With the combination application of the four keys OSC ◄, OSC ►, OSC ▲ and OSC ▼, the
users can make the following settings circularly by pressing OSC OPTION. The settings
include: Voltage Unit Scale of Channel 1 (CH1 VOL); Voltage Unit Scale of Channel 2 (CH2
VOL); Primary Time base (TIME BASE), zero point position of channel 1(CH1 ZERO), zero
point position of channel 2(CH2 ZERO), trigger horizontal position (TIME) and trigger level
position (TRIG).
z When performing Waveform Calculation, the users can also adjust and calculate the Display
Multiplying Factor of waveform (CHM VOL) and the vertical display position (CHM ZERO).
z In cursor measurement mode, the users can adjust the positions of Cursor 1 (V1 or T1) and
Cursor 2 (V2 or T2).
12. OSC ▼: Oscilloscope display downward adjustment key.
13. OSC ▲: Oscilloscope display upward adjustment key.
14. OSC/DMM: Operation mode switching key between oscilloscope and multimeter.
15. AUTO SET:
z Under the Multimeter Mode, when performing the current or voltage measurement, you can
make a measurement switch between AC and DC with this key pressed; when performing the
resistance measurement, you can select resistance, diode, On/Off or capacitance measurement
circularly with this key.
z While this key is used for auto setting under the oscilloscope operation mode.
16. RUN/STOP: key for running or stopping the operation.
17. MENU ▼: Choose the lower item on the menu list.
18. MENU: Show / Hide the menu
19. MENU ▲: Choose the upper item on the menu list.
20. F1
～
F5:
Switch
or
Adjust
8
options
for
each
menu.
digimess Handheld DSO & DMM
5-Using the Scope
5. Using the Scope
5.1 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.
5.2 Power-Up the Oscilloscope
Connect oscilloscope to AC power via a power 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 POW.
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.
5.3 Oscilloscope Operation Window
Refer to figure 4
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digimess Handheld DSO & DMM
5-Using the Scope
figure 4: Oscilloscope Operation Window
Description:
1.
Battery electric quantity indicating symbols, including , ,
and .
2.
Auto measurement window 1, in which “f ”means frequency, “T” means cycle, “V” means the
average value, “Vp” the peak-peak value and “Vk” the root-mean-square 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. The green pointer shows the trigger voltage level.
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 display shows the trigger signal source.
12. The reading gives the value of primary time base.
13. These graphics present the coupling modes of channel 2(CH2). The graphic “ ～ ”
indicates AC, the graphic “－” indicates DC.
14. This reading shows the vertical Voltage Unit Scale of CH2.
15. These graphics show the coupling mode of CH1, among which the graphic “～” express
indicates AC, the graphic “－” indicates DC.
16. This reading shows the vertical Voltage Unit Scale of CH1.
17. The blue pointer gives the grounding datum point of the waveform on CH2, which is the
zero position of CH2. No display of this pointer indicates that the channel has not been
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opened.
18. OSC OPTION operation prompt: There are different prompts for different OSC OPTION
operations.
19. The red pointer gives the grounding datum point of the waveform on CH1, which is the
zero position of CH1. No display of this pointer indicates that the channel has not been
opened.
20. Waveform display area. Red waveform represent CH1, blue waveform represent CH2.
5.4 Navigating a Menu
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.
Refer to figure 5
figure 5: the Tool’s Menus
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5.5 Manually Setting the Vertical System, Horizontal System
and Trigger Position
With the combination application of the four keys OSC LEFT, OSC RIGHT, OSC UP and OSC
DOWN, the users can make the following settings circularly by pressing OSC OPTION. The
settings include: Voltage Unit Scale of Channel 1 (CH1 VOL); Voltage Unit Scale of Channel 2
(CH2 VOL); Primary Time base (TIME BASE), zero point position of channel 1(CH1 ZERO),
zero point position of channel 2(CH2 ZERO), trigger horizontal position (TIME) and trigger level
position (TRIG).
The following example shows how to use OSC OPTION key to make a setting.
1.
Press once the OSC OPTION key; the following is displayed at the bottom left side of the
screen, as shown in the figure below.
◄/► – Time Base
▲/▼ – CH1 Vol
Refer to figure 6
figure 6: Voltage Unit Scale of Channel 1
2.
Press the key OSC ▲ or OSC ▼ to adjust the vertical scale of Channel 1 and press OSC
◄or OSC ► to adjust the horizontal time scale.
3.
Press OSC OPTION once again, the following display is visible at bottom left side of the
screen, as shown in the following figure.
◄/► – Time Base
▲/▼ – CH2 Vol
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Refer to figure 7
figure 7: Voltage Unit Scale of Channel 2
4.
Press the OSC ▲ or OSC ▼ key to adjust the vertical scale of Channel 2 and press the OSC
◄ or OSC ► key to adjust the horizontal time scale.
5.
Press the OSC OPTION key one more time, and the following display is visible at the
bottom left side of the screen, shown as the following figure.
◄/► – Time
▲/▼ – CH1 Zero
Refer to figure 8
figure 8: Zero Point Position of Channel 1
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6.
Press OSC ▲ or OSC ▼ key to adjust the zero position of Channel 1 in vertical direction
and press OSC ◄ or OSC ► key to adjust the horizontal position.
7.
Again, press OSC OPTION key and the following appears at the bottom left side of the
screen, shown as the following figure.
◄/► – Time
▲/▼ – CH2 Zero
Refer to figure 9
figure 9: Zero Point Position of Channel 2
8.
Press the OSC ▲ or OSC ▼ key to adjust the zero position of Channel 2 in the vertical
direction and press OSC ◄ or OSC ► key to adjust the horizontal position.
9.
Press OSC OPTION key once more and the following appears at the bottom left of the
screen, shown as the following figure.
◄/► – Time
▲/▼ – Trig
Refer to figure 10
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figure 10: Trigger Level Position
10.
Press the OSC ▲ or OSC ▼ key to adjust the trigger position of Channel 2 and press OSC
◄ or OSC ► key to adjust the horizontal position.
11.
Press the OSC OPTION key again and return back to step 1.
Term interpretation
z 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.
z 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.
z Primary time base: It means the time values represented by a division in the horizontal
direction of the display area.
z 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.
z Trigger level position: It represents the voltage deviation between the actual trigger level and
the zero position of the triggering signal source channel.
5.6 Resetting the Oscilloscope
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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3. Press F1 key to select the factory settings. The oscilloscope is set to be the factory settings.
Refer to figure 11
figure 11: Reset the Oscilloscope
5.7 Input Connections
Refer t figure 2.
Look at the bottom and the right of the Oscilloscope. The Oscilloscope has seven signal inputs: two
safety BNC jack inputs (CH1 and CH2) for scope measurements, three safety 4-mm banana jack
inputs for Multimeter R, V and A measurements, and two quadratic jack inputs for Multimeter
capacitance measurements.
Isolated input allows independent floating measurements between Multimeters and Scopes.
5.8 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, triggering and 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.
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5.9 Automatic Zero-returning of Trigger Horizontal Position
and Trigger Level Position
When we adjust the trigger horizontal position and trigger level position to be maximal to make it
off the screen center remotely, then we perform the following steps to make trigger horizontal
position and trigger level position return to zero automatically.
1.
Press OSC ◄ key and OSC ► key simultaneously, the trigger horizontal position
automatically returns to zero.
2.
Press OSC ▲ and OSC ▼ button simultaneously, the trigger level position automatically
returns to zero.
5.10 Automatic Measurements
The Oscilloscope offers 5 ranges of automatic scope measurements. Your can display two numeric
readings: measurement 1 and measurement 2. These readings are selectable independently, and
the measurements can be done on the input CH1 or input CH2 waveform.
To choose a frequency for CH1, do the following:
1.
Press MENU key and the function menu appears on the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key to select measurement 1. Five items selectable are
visible at the bottom of the screen.
3.
Press F1 key and select Freq CH1 from the mean square root value item. The measurement
1 window turns its color into red and shows the frequency for input CH1.
To choose a Peak-Peak measurement for Input CH2, do the following:
1.
Press MENU key and the function menu is displayed on the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key and select measurement 2, with 5 items selectable
displayed at the bottom of the screen.
3.
Press F4 key to select PK-PK CH2 from Peak-Peak item. The measurement 2 window turns
its color to be blue and shows the peak-peak value for input CH2.
Refer to figure 12
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5-Using the Scope
figure 12: Automatic Scope Measurements
5.11 Freezing the Screen
You can freeze the screen (all readings and waveforms)
1.
Press the RUN/STOP key to freeze the screen and STOP appears at top right side of the
screen.
2.
Press the RUN/STOP key once more to resume your measurement.
Refer to figure 13:
figure 13: Freezing the Screen
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5.12 Using Average for Smoothing Waveforms
To smooth the waveform, do the following:
1.
Press the MENU key and the function menu appears on the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key to select ACQU mode, with four items selectable
displayed at the bottom of the screen.
3.
Press the F3 key to select Average Factors, then, press F4 key to jump to Averaging 32 item.
This averages the outcomes of 32 acquisitions and shows the final averaging result on the
screen, shown as the following figures.
Refer to figure 14:
figure 14: Average Factor Sampling Mode
5.13 Using Persistence to Display Waveforms
You can use Persistence to observe dynamic signals.
1.
Press MENU key and the function menu appear on the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key to select DISP SET. Four items selectable are displayed
at the bottom of the screen.
3.
Press F2 key to select Persist 1 sec, 2 sec, and 5 sec, infinite or close. In this case, jump to
Infinite and the observed dynamic is kept on the screen continuously. When the item Close is
selected, the Persistence function is closed.
Refer to figure 15
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5-Using the Scope
figure 15: Persistence to Observe Dynamic Signals
5.14 Using Peak Detection to Display Glitches
You can use this function to display events (glitches or other asynchronous waveforms) of 50 ns or
wider.
1.
Press MENU key and the function menu appears at the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key to select the ACQU MODE. Four items selectable are
displayed at the bottom of the screen.
3.
Press F3 key and jump to Glitch Detect. In this case, you can test the glitch.
Refer to figure 16
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5-Using the Scope
figure 16: Peak Detection
Term interpretation
Collecting mode: The oscilloscope transforms the collected analog data into a digital form after
they are gathered in the following three different modes, such as sampling, peak value detection and
averaging values.
Sampling: The oscilloscope takes samples from the signal at a equal time interval to reconstruct the
waveform in this mode, by which the analog signal can be expressed correctly in most cases, yet, the
rapid changes can not be collected between two sampling time intervals, causing the confusion and
loss the narrow pulse in the signal probably.
Peak value detection: The oscilloscope takes samples from the maximum and minimum of signals
in each sampling interval and shows the waveform with the sampled data in this mode, thus, by
which the oscilloscope may collect the possibly lost narrow pulse in the sampling mode but the
noise is obvious.
Averaging values: the oscilloscope collects several waveforms and average over them, and
displays the averaged waveform in this mode, by which the random noise can be reduced.
Duration time: When a new waveform is displayed, the previous waveform shown on the screen
does not disappear immediately only to be displayed for a period of time, that is, the duration time,
by setting which, the waveform can be displayed more continuously and thus a display similar to
that shown by the analog oscilloscope can be achieved.
Roll scan mode: The oscilloscope updates the waveform sampling points by scrolling display
through a screen from left to right in this mode, which is only applicable to the primary time base
setting of above 50ms.
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5.15 Selecting AC-coupling
After a reset, the Oscilloscope is dc-coupled so that ac and dc voltages appear on the screen, Use
ac-coupling when you wish to observe a small ac signal that rides on a dc signal. To select
ac-coupling, do the following:
1.
Press MENU key and the function menu appear at the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key to select the CH1 Setting. Four items selectable are
visible at the bottom of the screen.
3.
Press the F1 key and jump to AC. The bottom left side of the screen displays the ac-coupling
icon.
Refer to figure 17
figure 17: AC-Coupling
5.16 Reversing the Polarity of the Displayed Waveform
To invert the input CH1 waveform, do the following:
1.
Press the MENU key and the function menu appears at the right side of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select CH1 setting. Four items selectable are
displayed at the bottom of the screen.
3.
Press F4 key to jump to Inverted. The inverted waveform of CH1 is displayed on the screen.
Refer to figure 18
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5-Using the Scope
figure 18: Inverted On
5.17 Using Waveform Mathematics Functions
When adding (CH1 + CH2), subtracting (CH1 – CH2, CH2 – CH1), multiplying (CH1 * CH2) or
dividing （CH1 / CH2） the input waveforms of CHI and CH2, the Oscilloscope will display the
mathematical result waveform M and the input waveforms of CH1 and CH2 on the screen. The
Mathematics functions perform a point-to-point calculation on the waveforms CH1 and CH2.
To use a Mathematics function, do the following:
1.
Press the MENU key and the function menu is displayed at the right side of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select the Waveform Calculation. Five items
selectable appears at the bottom of the screen.
3.
Press F3 key to select CH1+CH2 and the calculated waveform M (green) appears on the
screen. Again, press the F3 key to close Waveform Calculation.
4.
In this case, press the OSC OPTION key and the following is visible at the bottom left side
of the screen.
◄/► Time
▲/▼ CHM Zero
Then, press the OSC ▲ or OSC ▼ key to adjust the vertical position of the calculated
waveform M displayed on the screen.
5.
Press the OSC OPTION key and the following appears at the bottom left side of the screen.
◄/► Time Base
▲/▼ CHM Vol
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5-Using the Scope
Press the OSC ▲ or OSC ▼ key to adjust the displayed amplitude of the calculated
waveform M.
Refer to figure 19
figure 19: Waveform Mathematics
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digimess Handheld DSO & DMM
6-Using the Multimeter
6. Using the Multimeter
6.1 About this Chapter
This chapter provides a step-by-step introduction to the multi-meter functions of the test tool
hereafter. The introduction gives basic examples to show how to use the menus and perform basic
operations.
6.2 Making Meter Connections
Use the three 4-mm safety banana jack inputs for the Meter functions: COM, V/Ω, mA.
Two quadratic capacitance jacks: CX
Refer to figure 2 for the connections.
6.3 Multimeter Operation Window
figure 20: Multimeter Operation Window
Description
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digimess Handheld DSO & DMM
6-Using the Multimeter
1.
Battery electric quantity indictor.
2.
Manual/Auto range indictors, among which the MANUAL means measuring range in manual
operation mode and Auto refers to the measuring range in automatic operation mode.
3.
Measurement mode indicators:
DCV: Direct voltage measurement
ACV: Alternating voltage measurement
DCA: Direct current measurement
ACA: Alternating current measurement
R: Resistance measurement
: Diode measurement
: On/Off measurement
C: Capacitance measurement
4.
The relative magnitude measurement indicator.
5.
Running state indicators, among which RUN expresses continuous update and STOP
represents the screen locking.
6.
The reference value of the relative magnitude measurement.
7.
The multiplying power of the dial indication. To multiply the reading of dial pointer by
multiplying power will get the measurement result.
8.
The mail reading of measurement
9.
Automatic control measuring range.
10. Absolute/ relative magnitude measuring control: The sign “||” expresses the absolute
magnitude measuring control and “△” represents the relative magnitude measuring control.
Manually measuring range control.
11. Manual measurement control.
12. Test lead indicated the scale of test reading, different test modes display different colors.
6.4 Making Multimeter Measurements
Press DMM/OSC key, the oscilloscope will switch to the multimeter measure, the screen will
display the multimeter windows, at the same time, prompt to correctly insert testing pen of the
multimeter, at this time, then press any key to enter into multimeter measure.
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6.4.1 Measuring Resistance Values
To measure a resistance, do the following:
1.
Press the R key and R appears at the top of the screen.
2.
Insert the black lead into the COM banana jack input and the red lead into the V/Ω banana
jack input.
3.
Connect the red and black test leads to the resistor. The resistor value readings are shown on
the screen in Ohm.
Refer to figure 21
figure 21: Resistance Measurement
6.4.2 Making a Diode Measurement
To make a measurement on the diode, do the following:
1.
Press the R key and R appears at the top of the screen.
2.
Press AUTO SET key till the following is displayed on the screen
3.
Insert the black lead into the COM banana jack input and the red lead into the V/Ω banana
jack input.
4.
Connect the red and black leads to the resistor and the diode resistor readings are displayed on
the screen in V.
Refer to figure 22
27
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digimess Handheld DSO & DMM
6-Using the Multimeter
figure 22: Diode Measurement
6.4.3 On-off Test
To perform an On-off test, do the following:
1.
Press the R key and R appears on the top of the screen.
2.
Press the AUTO SET key till the following is shown on the screen.
3.
Insert the black lead into the COM banana jack input and the red lead into the V/Ω banana
jack input.
4.
Connect the red and black leads to the test point. If the resistance value of the tested point is
less than 50Ω, you will hear beep sound from the test tool.
Refer to figure 23
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digimess Handheld DSO & DMM
6-Using the Multimeter
figure 23: On-off Test
6.4.4 Making a Capacitance Measurement
To measure a capacitance, do the following:
1.
Press the R key and R appears on the top of the screen
2.
Press the AUTO SET key till C appears at the top of the screen.
3.
Insert the measured capacitance into the quadratic jack and the screen shows the capacitance
reading.
Notice: when measured value is less than 5 nF capacitance, please use small
capacitance measurer of this multimeter and use relative value measuring mode
to improve measuring precision. It will take about 30 seconds if capacitance
measurement is large than 40uF.
Refer to figure 24
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figure 24: Capacitance Measurement
6.4.5 Making a DC Voltage Measurement
To measure a DC voltage, do the following:
1.
Press the V key and DCV appears at the top of the screen.
2.
Insert the black lead into the COM banana jack input and the red lead into the V/Ω banana
jack input.
3.
Connect the red and black leads to the measured point and the measured point voltage value is
displayed on the screen.
Refer to figure 25
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figure 25: DC Voltage Measurement
6.4.6 Making a AC Voltage Measurement
To measure the AC voltage, do the following:
1.
Press the V key and DCV appears at the top of the screen.
2.
Press the AUTO SET key and ACV appears at the top of the screen.
3.
Insert the black lead into the COM banana jack input and the red lead into the V/Ω banana
jack input.
4.
Connect the red and black leads to the measured points and the AC voltage values of
measured points will be displayed on the screen.
Refer to figure 26
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figure 26: AC Voltage Measurement
6.4.7 Making a DC Current Measurement
To measure a DC current which is less than 400 mA , do the following:
1.
Press the A key and DCA appears at the top of the screen. The unit on the main reading screen
is mA. mA and 20A will display on the right bottom of screen, press F4 or F5 to switch the
measurement between Ma and 20A. 400mA is acquiescently.
2.
Insert the black lead into the COM banana jack input and the red lead into the mA banana jack
input.
3.
Connect the red and black leads to the measured points and the DC current values of measured
points will be displayed on the screen.
Refer to figure 27
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figure 27: DC Current Measurement for 400 mA
To measure a DC current which is larger than 400 mA, do the following:
1.
Press the A key and DCA appears at the top of the screen. The unit on the main reading screen
is mA..
2.
Press F5 key change to 20A measurement, the unit on the main reading screen is A.
3.
Plug current extended module in current measure jack, then plug the probe in the module
4.
Connect the red and black leads to the measured point and the DC current value of the
measured point will be displayed on the screen.
5.
Press F4 return to 400 mA measure.
Refer to figure 28
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6-Using the Multimeter
figure 28: DC Current Measurement for 20A
6.4.8 Making an AC Current Measurement
To measure an AC current which is less than 400 mA, do the following:
1.
Press the A key and DCA appears at the top of the screen. The unit on the main reading screen
is mA. mA and 20A will display on the right bottom of screen, press F4 or F5 to switch the
measurement between mA and 20A. 400mA is acquiescently.
2.
Press the AUTO SET key once and ACA is visible at the top of the screen..
3.
Insert the black lead into the COM banana jack input and the red lead into the mA banana jack
input.
4.
Connect the red and black leads to the measured point and the AC current value of the
measured point will be displayed on the screen.
Refer to figure 29
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6-Using the Multimeter
figure 29: AC Current Measurement for 400 mA
To measure an AC current which is larger than 400 mA, do the following:
1.
Press the AUTO SET key once and ACA is visible at the top of the screen.
2.
Press F5 to select 20A measure, the unit of main reading window is A.
3.
Press the AUTO SET key once and ACA is visible at the top of the screen.
4.
Plug current extended module in current measure jack, then plug the probe in the module.
5.
Connect the red and black leads to the measured point and the AC current value of the
measured point will be displayed on the screen.
6.
Press F4 return to 400mA measure.
Refer to figure 30
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digimess Handheld DSO & DMM
6-Using the Multimeter
figure 30: AC Current Measurement for 20A
6.5 Freezing the Readings
You can freeze the displayed readings at any time.
1.
Press the RUN /STOP key to freeze the screen and STOP will be displayed at the top right of
the screen.
2.
Again, press the RUN /STOP key, you can resume your measurement.
Refer to figure 31
figure 31: Freezing the Readings
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6-Using the Multimeter
6.6 Taking a Relative Measurement
A currently measured result relative to the defined reference value is displayed in a relative
measurement.
The following example shows how to take a relative measurement. At first, it is required to acquire
a reference value.
1.
Press R key and R is displayed on the top side of the screen.
2.
Press the AUTO SET key till C appears at the top of the screen.
3.
Plug capacitance extended module in capacitance measure jack.
4.
When the reading leveling off, press F2 key and △ is displayed on the top side of the screen.
The saved reference value is displayed below △.
5.
Plug capacitance, the displayed major reading on the screen is actual the capacitance value.
Refer to figure 32
figure 32: Relative Measurement
6.7 Selecting Automatic/Manual Range Adjustment
The defaulted range mode of the instrument is automatic range. To switch to the manual range,
perform the following steps:
1. Press F1 key and MANUAL is displayed on the top left side of the screen to enter the manual
range mode.
2. Under the manual range mode, the measuring range is increased by a stage when pressing F1
key each time, and when reaching the highest stage, it jumps to the lowest stage by pressing F1
key once again. To multiply the reading of dial pointer by multiplying power and the unit of
main reading on the screen will get the measurement result.
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3.
6-Using the Multimeter
Press F3 key and AUTO is displayed on the top left side of the screen to switch back to the
automatic range mode.
Refer to figure 33
figure 33: Automatic/Manual Range Adjustment
Attention: capacitance measurement without manual range mode.
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
7. Advanced Function of Oscilloscope
7.1 About this Chapter
This chapter will detail the oscilloscope function of the test tool.
7.2 Setting the Vertical CH1 and CH2
Each channel has its own independent vertical menu and each item can be set respectively based on
the specific channel.
To make vertical CH1 and CH2 settings, do the following:
1.
Press the MENU key and the function menu appears at the right of the screen.
2.
Press the MENU ▲ or MENU ▼ key to jump to CH1 Setting and 4 options appears at the
bottom of the screen.
3.
Select and press key from F1 through F4 keys to make different settings.
Refer to figure 34
figure 34: Setting the Vertical
３９
digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
The following Table describes the Vertical Channel menu:
Function
menu
Coupling
Channel
Probe
Invert
Description
Setting
AC
DC
Close
Open
1X
10X
100X
1000X
Close
Open
The dc component in the input signal is blocked..
The ac and dc components of the input signal are allowed.
Close the channel.
Open a channel.
Select one according the probe attenuation factor to ensure a correct
vertical scale reading.
Waveform is displayed normally.
Open the Invert function of the waveform setting.
7.2.1 Setting the Channel Coupling
With CH1 taken for example, the measured signal is a sine wave signal containing a dc offset. Press
F1 Coupling first and then AC to make an ac coupling setting. The dc component contained in the
tested signal is blocked.
Press F1 Coupling first and then DC to make a dc coupling setting. Both dc and ac components
contained in the tested signal are permitted.
Refer to figure 35 and figure 36
figure 35: AC Coupling
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 36: DC Coupling
7.2.2 Make Open and Close Settings on Channel
Take CH1 as an example.
Press F2 Channel key first, and then press Close to make a Close setting on CH1.
Press F2 Channel key first, and then press Open to make an Open setting on CH1.
7.2.3 Adjusting the Probe Scale
It is necessary to adjust the probe attenuation scale factor correspondingly in the channel operation
menu in order to comply with the probe attenuation scale. If it is a 10:1 probe, the scale of the input
channel of the oscilloscope should be selected as 10X to avoid any error occurring in the displayed
scale factor information and tested data.
Press F3 Probe to jump to the relative probe.
Table: Probe attenuation factor and the corresponding menu setting
Probe attenuation factor
1:1
10:1
100:1
1000:1
Corresponding Menu Setting
1X
10X
100X
1000X
7.2.4 Setting of Inverted Waveform
Inverted waveform: The displayed signal reverses 180 degrees relatively to the ground potential.
４１
digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
Press F4 Invert to start Invert; again press F4 Invert to close Invert.
7.3 Make the Math Function Menu Setting
The MATH functions in showing the result of adding, subtracting, multiplying or dividing
calculation on CH1 and CH2 channel waveforms. Also, the result of arithmetic operation can be
measured with grid or cursor. The amplitude of the calculated waveform can be adjusted with CHM
VOL, which is displayed in the scale factor form. The amplitude ranges from 0.001 through 10 and
steps in the 1-2-5 form, that is, it can be expressed as 0.001X, 0.002X, 0.005X…10X. The position
of the calculated waveform can be adjusted up and down with the CHM ZERO key used.
The corresponding operation function table
Setting
CH1-CH2
CH2-CH1
CH1+CH2
CH1*CH2
CH1/CH2
Description
CH1 waveform minus CH2 waveform.
CH1 waveform minus CH2 waveform
Add CH1 waveform into CH2 waveform.
Multiply CH1 waveform and CH2 waveform.
Divide CH1 waveform by CH2 waveform.
To perform the CH1+CH2 waveform calculation, do the following:
1.
Press the MENU key and the function menu appears at the right of the screen.
2.
Press the MENU UP or MENU DOWN key to select MATH and 5 options are displayed at the
bottom of the screen.
3.
Press the F3 CH1+CH2 key and the obtained waveform M appears on the screen. Again, press
the F3 key and Close the waveform M.
4.
Press the OSC OPTION key and the following is displayed on the screen:
◄/► – Time Base
▲/▼– CH1 Vol
5.
Press the OSC ▲ or OSC ▼ key to adjust the amplitude of the waveform M.
6.
Again, press the OSC OPTION key twice and the screen shows the following:
◄/► – Time
▲/▼ – CHM Zero
7. Press the OSC ▲ or OSC ▼ key to adjust the position of the waveform M.
Refer to figure 37
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 37: Waveform Mathematics
7.4 Setting the Trigger System
The Trigger defines the time when the acquisition of data and display of waveform start. If it is set
correctly, the trigger can turn an unstable display into a significant waveform.
When starting the acquisition of data, the oscilloscope collects sufficient data to draw the waveform
at the left side of the triggering point. With waiting for the triggering condition, the oscilloscope is
gathering data continuously. After a trigger is detected, the oscilloscope gathers enough data
continuously to draw the waveform at the right side of the triggering point.
To make a trigger mode setting, do the following:
1.
Press the MENU key and the function menu appears at the right of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select TRIG MODE and five items selectable are
displayed at the bottom of the screen.
3.
Select and press one from F1 through F5 key to make a different setting.
4.
Press the OSC OPTION key and the following is shown on the screen:
◄/► – Time
▲/▼ – Trig
5.
Press the OSC ▲ or OSC ▲ key to adjust the trigger level position.
Refer to figure 38
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 38: Edge Trigger
7.5 Triggering Control
There are two triggering modes including Edge triggering and Video triggering. Each trigger mode
is set by different function menu.
Edge triggering: It occurs when the trigger input passes through a given level along the specified
direction.
Video triggering: Perform video field trigger or line trigger on the standard video signals.
The following describes the Edge triggering and Video triggering menus respectively.
7.5.1 Edge Triggering
The Edge triggering is a mode by which trigger occurs at the triggering threshold value of the input
signal edge. With the Edge triggering selected, the trigger happens on the rise or fall edge of the
input signal, shown as the following figure.
The Edge triggering menu is described in the following table.
Function menu
Slope
Signal source
Trigger mode
Settings
Rise
Fall
CH1
CH2
Auto
Normal
Description
Triggering on the rise edge of the signal.
Triggering on the fall edge of the signal.
CH1 is used as the trigger source.
CH2 is used as the trigger source.
Acquisition of waveforms is possible even if there is no
triggering condition detected.
Acquisition of waveforms can only be done when the triggering
condition is satisfied.
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digimess Handheld DSO & DMM
Single shot
Coupling
7-Advanced Function of Oscilloscope
DC
The sampling is performed on a waveform when one trigger is
detected, then stop sampling. .
With this mode selected, the DC component is prevented from
passing-though.
All dc components are allowed.
HF
suppression
The HF part of the signal is prohibited and only the HF
component is allowed.
LF
suppression
The LF part of the signal is prohibited and only the LF
component is allowed.
AC
7.5.2 Video Triggering
With Video triggering selected, the oscilloscope performs the NTSC, PAL or SECAM standard
video signals field or line trigger.
Refer to figure 39 and figure 40
figure 39: Video Field Trigger
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 40: Video Line trigger
The Video triggering menu is described in the following table.
Function menu
Polarity
Settings
Normal
Invert
Signal source
SYNC
CH1
CH2
Line
Field
Description
Applicable to the video signal in which the black level is of
low level.
Applicable to the video signal of which the black level is of
high level.
Select CH1 as the trigger source.
Select CH2 as the trigger source.
Make a video line trigger synchronization setting
Make a video field trigger synchronization setting.
Term interpretation
Trigger modes: There are three kinds of trigger modes available for this oscilloscope, including
auto, normal and single shot.
Automatic trigger mode: The oscilloscope can acquire the waveform without any triggering
condition detected in this mode, in which it will be triggered compulsively when waiting for a
specified period of time without any triggering condition ignited When an invalid trigger is
enforced，the oscilloscope can not keep the waveform in phase.
Normal trigger mode: In this mode, the oscilloscope cannot acquire the waveform till it is
triggered. When there is not any trigger, the oscilloscope will display the origin waveform without
new waveforms captured.
Single shot mode: In this mode, the oscilloscope will detect a trigger and capture a waveform at
each time when the customer presses the RUN/STOP key.
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
7.6 Acquiring Mode Setting
The Acquiring Mode menu is described in the list shown as below.
Function menu
Sampling
Peak Detection
Average value
Settings
Average factor
4, 16, 64
or 128
Description
Normal sampling mode.
Used to detect the jamming glitch and reduce the possible blurring.
Used to reduce the random and unrelated noises. Several average
factors are available for being selected.
Select the average factor.
7.7 Display Setting
The Display Setting menu is described in the following table.
Function menu
Type
Persistence
Display format
Communication
Settings
Vector
Dot
Close
1s
2s
5s
Infinite
YT
XY
Bitmap
Vector
Description
The vector is filled up spaces between neighboring sampling
points in the display.
Only sampling points are displayed.
Setting persistence time for each sampling point.
Display the relative relationship between vertical voltage and
horizontal time.
Display CH1 on the horizontal axis and CH2 on the vertical axis.
The data transmitted in communication are bitmaps.
The data transmitted in communication are vectors.
7.7.1 Display Style
Refer to figure 41 and figure 42
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 41: Dot Style
figure 42: Vector Style
7.7.2 Persistence
With Persistence function selected, the displayed saved original data gradually decay in color and
the new data are bright in color; with infinite persistence mode selected, the recorded points will be
kept on the screen till the controlled value is changed.
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
7.7.3 XY Mode
This mode is only applicable to CH1 and CH2. With the XY mode selected, CH1 is displayed on the
horizontal axis and CH2 is on the vertical axis; when the oscilloscope is under the sampling mode in
which no trigger is found, the data appear in light spots.
Operations for various control keys are shown as below:
■
The CH1 VOL and CH1 ZERO for CH1 are used to set the horizontal scale and position.
■
The CH2 VOL and CH2 ZERO for CH2 are used to set the vertical scale and position
continuously.
The following functions do not work in the XY display mode:
■
Reference or digital value waveform
■
Cursor
■
Auto Setting
■
Time base control
■
Trigger control
7.8 Waveform Saving Setups
The oscilloscope can save 4 waveforms, which can be displayed on the screen with the present
waveform. The recalled waveform saved in the memory cannot be adjusted,
The waveform saving /recalling menu is described in the following list.
Function menu
Signal source
Address
Saving
Addresses A, B,
C and D
Setups
CH1
CH2
MATH
A, B, C and D
Close
Start
Description
Select the displayed waveform which you want to save.
Select the address for saving or recalling a waveform.
Store the waveform of a selected signal source into the selected
address.
Close or start displaying the waveforms stored in address A, B,
C or D.
To save a waveform on CH1 in address A, do the following:
1.
Press the MENU key and the function menu appears at the right of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select the Waveform Saving. Four items selectable
are displayed at the bottom of the screen.
3.
Press the F1 key to select the signal source CH1.
4.
Press the F2 key to select the address A.
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digimess Handheld DSO & DMM
5.
7-Advanced Function of Oscilloscope
Press the F3 key to save the waveform on CH1 in address A.
To display the saved waveform on the screen, do the following:
6.
Press the F4 key to select Start for the address A. The waveform saved in address A will be
displayed on the screen in green color.
The display color is green, and the zero point of waveform k, voltage and time is purple
Refer to figure 43
figure 43: Waveform Saving
7.9 Function Setting Menu
The function setting menu is described in the following list.
Function menu
Factory setting
Self-correcting
LANGUAGE
Setting
CHINESE
ENGLISH
Description
Resume the instrument to its factory settings.
Perform the self-correcting procedure.
Select the display language of the operation system.
Self-correcting:
The self-correcting program can improve the accuracy of the oscilloscope under the ambient
temperature to the maximum. If the ambient temperature variation is equal to or larger than 5
Celsius degrees, the self-correcting program should be performed to gain the maximum accuracy.
Before the self-correcting program is performed, the probe or lead should be disconnected with the
input connector, then, select the F2 key Self-correcting item. After confirming that everything is
ready, press the F2 key “Self-correcting” key and enter into the self-correcting program.
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7-Advanced Function of Oscilloscope
7.10 Making Automatic Measurements
The oscilloscope can perform 5 types’ automatic measurements such as frequency, cycle, average
value, peak-to-peak value and root mean square value. Meanwhile it provides two kinds of
measurement results simultaneously on the screen.
The function menu for automatic measurements is described in the following list.
Function menu
Frequency
Cycle
Average value
Peak-to-Peak value
RMS value
Settings
CH1
CH2
CH1
CH2
CH1
CH2
CH1
CH2
CH1
CH2
Description
Measure the frequency of CH1
Measure the frequency of CH2
Measure the cycle of CH1.
Measure the cycle of CH1
Measure the average value of CHI.
Measure the average value of CH2.
Measure the peak-to-peak value of CH1.
Measure the peak-to-peak value of CH2.
Measure root mean square (RMS) value of CH1.
Measure root mean square (RMS) value of CH2.
To measure the frequency of CH1 with Measurement 1 and the frequency of CH2 with
Measurement 2, do the following:
1.
Press the MENU key and the function menu is shown at the right of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select Measurement 1. Five options appear at the
bottom of the screen.
3.
Press the F1 key to select the frequency measurement as CH1. The measurement window 1
on the screen turns into one red in color and shows the frequency of CH1.
4.
Press the MENU ▲ or MENU ▼ key to select Measurement 2. Five options appear at the
bottom of the screen.
5.
Press the F4 key to jump to the peak-to-peak measurement as CH2. The measurement
window on the screen turns into one blue in color and shows the peak-to-peak value of CH2.
Refer to figure 44
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 44: Automatic Measurements
7.11 Setting the Cursor Measurements
This oscilloscope allows you to make manual cursor measurements on time and voltage. The signal
sources include Channel 1(CH1), Channel 2 (CH2), MATH, storage address A and storage address
B.
The cursor measurement menus are listed and described in the following table.
Function menus
Type
Signal sources
Settings
Close
Voltage
Time
CH1, CH2, ATH,
address A and address
B.
Description
Close the cursor measurement.
Display the voltage measurement cursor and menu.
Display the time measurement cursor and menu.
Select the waveform channel on which the cursor
measurement will be performed.
To make a voltage measurement on CH1, doing the following:
1.
Press the MENU key and the function menus are displayed at the right of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select Cursor Measurement. Two options are
shown at the bottom of the screen.
3.
Press F1 key to select the measurement type Voltage. Two purple crossing dashed lines V1
and V2 are shown on the screen.
4.
Press the F2 key to select the measured channel CH1.
5.
Press and hold the OSC OPTION key till the ▲/▼ CURSOR V1 is visible on the screen.
At this time, adjust OSC ▲ or OSC ▼ and you can see that the dashed line V1 is moving up
and down while the measured voltage value of V1 relative to the zero position of CH1
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
appears on the screen.
6.
Press and hold the OSC OPTION key till ▲/▼ CURSOR V2 appears on the screen. Now,
adjust the OSC ▲ or OSC ▼ and you can observe the dashed line V2 moving up and down
while the measured voltage value of V2 relative to the zero position of CH1 is displayed on
the screen. Also, the absolute values of V1 and V2 can be shown on the screen.
Refer to figure 45
figure 45: Use the Cursor for a Voltage Measurement
To use the cursor for a time measurement on CH1, do the following:
1.
Press the MENU key and the function menus are displayed at the right of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select Cursor measurement key. Two key labels
selectable are shown at the bottom of the screen.
3.
Press the F1 key to the measurement type Time. Two vertical dashed lines T1 and T2 appear
on the screen.
4.
Press the F2 key and jump to the measured channel CH1.
5.
Press and hold the OSC OPTION key till the ▲/▼ CURSOR T1 appears on the screen.
Then, adjust the OSC ▲ or OSC ▼ and you can observe the dashed line moving left and
right. At the same time, the time value of T1 relative to the screen middle point position will
be displayed on the screen.
6.
Keep pressing on the OSC OPTION key till the ▲/▼ CURSOR T2 is displayed on the
screen. Then, adjust the OSC ▲ or OSC ▼ and you can find that the dashed line T2 is
moving right and left while the time value of T1 relative to the screen middle point position
appears on the screen. You can also observe the absolute time values and frequencies of T1
and T2.
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
Refer to figure 46
figure 46: Use the Cursor for a Time Measurement
7.12 System State Menu
The system state menu is used to display information about the present horizontal system, vertical
system, trigger system and others. The operation steps are shown as below.
1.
Press the MENU key and the function menu is displayed at the right of the screen.
2.
Press the MENU ▲ or MENU ▼ key to select the System State. Four options appear at the
bottom of the screen.
3.
Sequentially press key F1 through F4 key and the corresponding state information will be
shown on the screen.
Refer to figure 47
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 47: System State
7.13 Setting of Time Base Mode
The time base mode menu is explained as the following table.
Function menu
Setting
Explanation
Main time base
Horizontal main time base is used to wave display
Window setting
Use two cursors to define a window area
Window extension
Expand the defined window to full-screen display
For the operation of window extension, please execute the following steps:
1.
Press MENU key, display the function menu on the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key to select time base mode, display three options at the
bottom.
3.
Press F2 key to select window setting.
4.
Press OSC OPTION key, pop up TIME BASE, at this time, then press OSC ◄ and OSC ►
key to adjust the time base window area defined by two cursors, the window size will vary.
5.
Press OSC OPTION key and call TIME, at this time, press OSC ◄ and OSC ► to adjust the
window position defined by two cursors, the window position is the time difference of the
window center to main time base’s horizontal pointer.
6.
Press F3 key, select window extension, the defined window extends into the full-screen
display.
Refer to figure 48 and figure 49
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
figure 48: Window Setting
figure 49: Window Extension
7.14 Data Transmission
For the operation of data transmission, please execute the following steps:
1.
Press MENU key, display the function menu on the right side of the screen.
2.
Press MENU ▲ or MENU ▼ key to select display setting mode, display four options at the
bottom.
3.
Press F4 key, and select the Bitmap or Vectors for data transmission.
4.
Use a data line to connect the oscilloscope and the PC.
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digimess Handheld DSO & DMM
7-Advanced Function of Oscilloscope
5.
Open the DIGIMESS software that had been installed completely.
6.
Setting the parameter under the use’s manual, and then starts data transmission.
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8-Trouble Shooting
8. Trouble Shooting
1. The oscilloscope can not boot up.
It may caused by the low battery. In this case, the oscilloscope can not boot up even after power
on. To solve the problem, charge up the battery and supply the oscilloscope with power by
using the battery charger. Only switch on the oscilloscope after charging for 15 minutes. If the
oscilloscope still can not boot up, please contact DIGIMESS for service.
2. The oscilloscope stops working after operate for a few seconds
Find out whether the battery has been run out by checking the battery symbol at the upper right
of the screen. If the symbol
and must be charged.
turns up, it indicates that the battery has been run out of power
3. The measurement type displays ERR when switched to the multimeter mode.
Make sure an appropriate measuring mode is selected. To select a measuring mode, press one
of the key among V, A and R to display the relative measuring mode on the screen. If the ERR
is still displayed, restart the oscilloscope.
4. The measured voltage amplitude value is 10 times larger or smaller than the
actual one under the oscilloscope mode.
Check whether the channel attenuation factor and the actual probe error ratio is match.
5. The waveform is displayed on the screen is not stable under the oscilloscope
mode.
z Check whether the signal item in the trigger mode menu and the actually used signal
channel are match.
z Check the trigger mode: The edge trigger mode is applicable to the universal signal and the
video trigger mode applicable to the video signal. The displayed waveform can be stable
only when the proper trigger mode is applied.
z Try to change the trigger coupling into the HF repression and LF repression to filter the HF
or LF noise trigger by the interference.
6. There is no display on the screen when you push down RUN/STOP key under
the oscilloscope mode.
Check whether the trigger mode in the trigger mode menu is in normal or single shot and
whether the trigger level is out of the waveform range.
In this case, adjust and set the trigger level in the middle or select the non-auto trigger mode.
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8-Trouble Shooting
Alternatively, press the AUTO SET key to complete the above setting.
7. When the average sampling in the sampling mode or a longer display time is
selected in the display mode under the oscilloscope mode, the display speed is
slow.
It is normal in the above case.
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digimess Handheld DSO & DMM
9-Appendix
9. Appendix
9.1 Appendix a Specifications
9.1.1 Oscilloscope
Only if another instruction is provided, are all technical specifications applicable to the probe with
the 10X attenuation switch setting and the HS series digital type oscilloscope. In order to be up to
these specifications, the oscilloscope should meet the following requirement.
■
The instrument should operate continuously for more than 30 minutes under the specified
operating temperature.
■
If the operating temperature range of variation is up to or larger than 5 Celsius degrees, the
system function menu must be opened to make the system perform a “self- calibration”
procedure.
Except those specifications marked with the word Typical, all specifications can be up to.
Sampling
Sampling modes
Sampling rate
Normal sampling
Peak detection
Average value
250 MSa/s
Input
Input coupling
Input impedance
Probe attenuation coefficient
Max. Input voltage
DC, AC
1MΩ±2% connected in parallel with 20pF±5pF
1X, 10X, 100X, 1000X
400V (peak)
Horizontal
Sampling rate range
Waveform interpolation
Record length
Scanning speed range（S/div）
Time interval (△T)measurement
accuracy（DC～50M）
10S/s～250MS/s
（sin x）/x
6K points on each channel
5ns/div～5s/div, stepping in the “1-2-5” mode.
Single: ± (1 sampling interval time+100ppm ×
reading+0.6ns)
>average 16 : ± (1 sampling interval time +100ppm ×
reading+0.4ns)
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9-Appendix
Vertical
Analog digital converter（A/D）
Sensitivity range （V/div）
Displacement range
Analog bandwidth
Single bandwidth
Low frequency response （ AD
coupling, -3dB）
Rise time（typical one at the BNC）
DC gain accuracy
DC measurement accuracy（average
value sampling mode）
With the resolution of 8 bits, make sampling on both
channels synchronously.
5mV/div～5V/div（at the input BNC）
±50V(500mV～5V),±2V(5mV～200mV)
60M
Full bandwidth
≥5Hz（at the BNC ）
≤5.8ns
±5%
The voltage difference (△V) between any two points on the
waveform after averaging the captured waveforms more
than 16: ±(5% reading + 0.05 divisions).
Trigger
Trigger sensitivity （Edge
triggering）
DC
coupling
AC
coupling
Triggering lever range
Triggering level accuracy
(typical) which is applicable to
the signal with rise and fall time
equal to or longer than 20ns
Trigger displacement
Make a 50% level setting
(Typical).
Trigger sensitivity (Video
triggering and typical mode)
Signal system and line/field
frequency (Video triggering
mode)
CH1 and CH2: 1div(DC～full bandwidth)
Same as the DC coupling when it is equal to or
larger than 50Hz.
±6 divisions from the screen center
±0.3 divisions
655 divisions for pre-triggering and 4 divisions for posttriggering
Operation with the input signal frequency equal to or larger than
50Hz.
2 divisions of peak-to-peak value
Support the NTSC, PAL and SECAM broadcasting systems of
any field or line frequency.
Measurement
Cursor measurement
Auto measurement
Voltage difference (△V) and time difference (△T) between cursors
Peak-to-peak value, average value, root mean square value, frequency and
cycle.
Probe
Bandwidth
Attenuation rate
Compensation range
Input resistance
1X position
Up to 4 MHz (DC)
1: 1
10pf～35pf
1MΩ±2％
10X position
Up to full bandwidth (DC)
10: 1
10MΩ±2％
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digimess Handheld DSO & DMM
Input impendence
Input voltage
9-Appendix
85pf～115pf
150 V DC
14.5pf～17.5pf
300 V DC
9.1.2 Meter
Voltage (VDC)
Input Impedance: 10MΩ.
Max. Input Voltage: 1000V (DC or AC peak-to-peak value)
Range
400.0mv
4.000V
40.00V
400.0V
Accuracy
±1%±1 digit
Resolution
100uV
1mV
10mV
100mV
Voltage (VAC)
Input Impedance: 10MΩ.
Max. Input Voltage: 750V(AC, virtual value)
Frequency range: from 40Hz to 400Hz.
Display: Virtual value of the sine wave
Range
4.000V
40.00V
400.0V
Accuracy
±1%±3 digits
Resolution
1mV
10mV
100mV
Direct Current (DC)
Range
40.00mA
400.0mA
Accuracy
±1%±1 digit
±1.5%±1 digit
Resolution
10uA
100uA
20A
±3%±3字
10mA
Range
40.00mA
400.0mA
Accuracy
±1.5%±3 digit
±2%±1 digit
Resolution
10uA
100uA
20A
±5%±3字
10mA
Range
400.0 Ω
4.000KΩ
40.00KΩ
400.0KΩ
4.000MΩ
Accuracy
±1%±3 digits
±1%±1 digit
Resolution
0.1Ω
1Ω
10Ω
100Ω
1KΩ
Alternating Current (AC)
Resistance
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digimess Handheld DSO & DMM
40.00MΩ
9-Appendix
±1.5%±3 digit
10KΩ
Accuracy
±3%±3 digits
Resolution
10pF
100pF
1nF
10nF
100nF
Capacitance
Range
51.20nF
512.0nF
5.120uF
51.20uF
100uF
Diode
Voltage reading: 0 V ～1.5 V.
On-off Test
You can a beep sound when the on-resistance is less than 30Ω.
9.1.3 General Specifications
Basic parameter
Mechanical dimension
Weight
Power consumption
18 cm×11.5cm×4cm
645 g
＜7W
Display type
3.8" color liquid crystal display
Display resolution
320 (horizontal) ×240 (vertical) pixels
Display color
4096 colors
Power Adapter
Power supply
100-240 V AC 50/60Hz
Power output
8.5 VDC
Current output
1500 mA
Working environment
Temperature
Operation
Used battery
0 to 50 °C(32 to 122 °F)
Power adapter
0 to 40 °C(32 to 104 °F)
Storage.
-20 to +60 °C(-4 to +140 °F)
Temperature
Operation:
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9-Appendix
0 to 10 °C(32 to 50 °F)
no condensation
10 to 30 °C(50 to 86 °F)
95 %
30 to 40 °C(86 to 104 °F)
75 %
40 to 50 °C(104 to 122 °F)
45 %
storage
-20 to +60 °C(-4 to +140 °F).
no condensation
9.2 Appendix B: Maintenance and Cleaning
9.2.1 Common Maintenance
Do not store or place the instrument in locations where the liquid crystal display (LCD) may be
directly exposed to the sunshine for a long time.
Be careful: Do not make spraying agent, liquid and solvent touch with probes to avoid the
instrument or probe being damaged.
Cleaning
Inspect the instrument and the probe frequently in accordance with operating conditions. Clean the
outer surface of the instrument according to the following steps:
1. Wipe off the floating dust outside of the instrument and the probe by using soft cloth. When
cleaning the LCD, do not scuff the transparent LCD protective screen.
2. Wipe the instrument in power off status by soft cloth that is moist but not dripping. It is
allowed to be cleaned by soft detergent or fresh water. Do not use any abrasive chemical
detergent to avoid the instrument or the probe being damaged.
Warning: Before re-powering and reuse, please confirm that the instrument has been dried
out so as to avoid electrical short circuit and personal injury caused by moisture.
9.2.2 Storage of Oscilloscope
If the test tool is to be stored for a long time, it is required to charge the lithium battery before
storage.
Charging the oscilloscope
The lithium battery is possibly not charged when delivery. To make the battery with enough electric
quantity, it must be charged for 4 hours (the test tool must be turned off during charging). The
battery can supply power for 4 hours after being charged completely.
When supplying power by using the battery, a battery indicator is displayed on the top of the screen
to show the consumption condition of electric quantity. The symbols that are possibly appear
include , ,
and , where
shows that the battery can only be used for about 5 minutes. To
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digimess Handheld DSO & DMM
9-Appendix
charge the battery and power the instrument, connect the oscilloscope using a power adapter
according to Figure 1 to charge the battery. The charging speed can be increased by turning off the
test tool.
Notice
To avoid superheat of battery during charging, the environment temperature is not allowed to
exceed the permissible value given in technical specification.
Note:
No hazard will occur even connecting the charger for a long time, e.g. during a whole weekend. The
instrument can automatically switch to slowly charging status.
9.2.3 Replacing the Lithium Battery Unit
It is usually not required to replace the battery unit. But when it is required to replace it, only
qualified personnel can carry out this operation, and only use the same specification lithium battery.
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