User Manual
Contents
1. 42 MS 400 Version 2 0 December 2007 The user can view a screen that looks similar to the following Figure 46 System State Menu The system state menu is used to display information about the present horizontal system vertical system trigger system and others The operational steps are listed below 1 Press the MENU key the function menu will appear at the right side of the screen 2 Press the MENU UP or MENU DOWN key to select SYS STAT Four options appear at the bottom of the screen 3 Sequentially press F1 through F4 and the corresponding status information will display The following Figure 47 will be displayed f SOHZ f 50HZ Figure 47 System State 43 MS 400 Version 2 0 December 2007 Setting the Time Base Mode The time base mode menu is detailed in the following table Main time base Horizontal main time base is used for waveform display Window setting Use two cursors to define a window area Window extension Expand the defined window to full screen display For a Window Extension use the following steps 1 Press the MENU key the function menu will appear on the right side of the screen Press the MENU UP or MENU DOWN key to select TIME MODE three options appear at the bottom of the display Press the F2 key to select the window setting Press the OSC OPTION key to view TIME BASE then use the OSC LEFT and OSC RIGHT keys to adjust the time base window area defined2. CH1 while the lower one is for Channel 2 CH2 8 MS400 Version 2 0 December 2007 Description of the Front Panel and the Keypad 1 2 3 4 20 13 5 9 19 6 18 7 17 10 16 Ole Oscilloscope car CAP 11 1412 15 Figure 3 Description 1 Power adapter jack Serial port USB jack Backlight switch POWER Power switch A Multimeter current measurement key V Multimeter voltage measurement key P oS St ee S R Multimeter resistance diode On Off and capacitance measurement key 9 OSC LEFT Oscilloscope left direction adjustment key 10 OSC RIGHT Oscilloscope right direction adjustment key 11 OSC OPTION Oscilloscope setting key 9 MS400 Version 2 0 December 2007 12 13 14 15 16 17 18 T9 20 Using the four keys OSC LEFT OSC RIGHT OSC UP and OSC DOWN users can make the following settings by pressing OSC OPTION The settings include Voltage Unit Scale for Channel 1 CH1 VOL Voltage Unit Scale for Channel 2 CH2 VOL Primary Time base TIME BASE zero point position for Channel 1 CH1 ZERO zero point position for Channel 2 CH2 ZERO trigger horizontal position TIME and trigger level position TRIG When performing Waveform Calculations users can also adjust and calculate the Display Multiplying Factor of a Waveform CHM VOL and the vertical display position CHM ZERO In cursor measurement m
3. Set the F2 Channel key to OFF and CH1 will be turned off Set the F2 Channel key to ON and CH1 will be displayed Adjusting the Probe Scale If a 10 1 probe is connected the scale of the input channel on the oscilloscope should be set to 10X to avoid any error occurring in the displayed scale factor information and tested data Press F3 Probe to set the correct probe attenuation Table Probe attenuation factors and the corresponding menu setting Probe Attenuation Corresponding Menu Setting Factor a e A O p10 OX 100 1 100X 1000 1 1000X Inverting a Waveform The displayed signal reverses 180 degrees relative to ground Press F4 Invert to invert the waveform Press F4 Invert once again to cancel the Inversion Math Function Menu Settings The MATH function provides the results for addition subtraction multiplication or division calculations on CH1 and CH2 channel waveforms The result can be shown in grid or cursor modes The amplitude of the calculated waveform can be adjusted with CHM VOL which is displayed in the scale factor form The amplitude ranges are 0 001X 0 002X 0 005X and 10X The position of the calculated waveform can be adjusted up and down with the CHM Zero key Math Function Table Setting Description O O lt OZO OoOo CH1 CH2 CH1 waveform minus CH2 waveform CH2 CH1 CH1 waveform minus CH2 waveform CH1 CH2 Add CH1 waveform to CH2 waveform CH1 CH2 Multiply CH1 waveform and CH2 waveform
4. 2007 PF 1 150KH2 Vp 160 Base Figure 7 Voltage Unit Scale of Channel 2 4 Press the OSC UP or OSC DOWN key to adjust the vertical scale of Channel 2 and press the OSC LIFT or OSC RIGHT 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 in figure 8 LEFT RIGHT Time UP DOWN CH1 Zero 1 117KHZ Vp 144 LEFT RIGHT Time l j E erp 1 Figure 8 Zero Point Position of Channel 1 6 Press OSC UP or OSC DOWN key to adjust the zero position of Channel 1 in the vertical direction and press OSC LIFT or OSC RIGHT key to adjust the horizontal position 15 MS400 Version 2 0 December 2007 Again press OSC OPTION key and the following appears at the bottom left side of the screen shown as the following figure 9 LEFT RIGHT Time UP DOWN CH2 Zero Po 1 11 kH2 Vp 160 P 1 150KH2 Vp 144 LEFT RIGHT Time p DOWN Fi io CHL 100m CH2 1 003 16 MS 400 Version 2 0 December 2007 Term Glossary Vertical scale factor is the voltage amplitude represented by a division in the vertical direction of the display area The user can amplify or attenuate the signal with this scale factor and thus regulate the signal amplitude for the expected range Vertical zero position is referred to as the grounding data point through the adjustment of which one can regulate the display position of t
5. C or D al 7 To save a waveform on CH1 in address A 1 Press the MENU key the function menu will appear at the right of the screen 2 Press the MENU UP or MENU DOWN key to select Wave Save Four selectable items 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 5 Press the F3 key to save the CH1 Waveform in Address A To display the saved Waveform Press the F4 key to select Start for address A The Waveform saved in address A will be displayed on the screen in green and the zero point of Waveform k voltage and time will be purple 39 MS400 Version 2 0 December 2007 The user can view a screen that looks similar to the following Figure 43 rf 1 001KH2Z f 1 001KH2Z Trig d Figure 43 Saving a Waveform Function Setting Menu The Function Setting Menu is described in the following list a eer Factory setting ee Return the instrument to its factory settings Self correcting SS Perform a self correcting procedure Language Chinese Select the display language English Self correcting The self correcting program can improve the accuracy of the oscilloscope if the ambient temperature variation is equal to or larger than 5 degrees Celsius Before the self correcting program is performed the probe or leads should be disconnected Press F2 Self correcting to enter the self correcting program Automatic Measureme
6. CH1 CH2 Divide CH1 waveform by CH2 waveform 33 MS 400 Version 2 0 December 2007 To perform a CH1 CH2 waveform calculation 1 2 3 Press the MENU key and the function menu will appear at the right of the screen Press the MENU UP or MENU DOWN key to select WAVE MATH Five options are displayed at the bottom of the screen Press the F3 CH1 CH2 key and the obtained waveform M appears on the screen Press the F3 key again to close the waveform M Press the OSC OPTION key and the following will be displayed on the screen LEFT RIGHT Time Base UP DOWN CH1 Volts Div Press the OSC UP or OSC DOWN key to adjust the amplitude of the waveform M Press the OSC OPTION key twice and the following will appear LEFT RIGHT Time UP DOWN CHM Zero Press the OSC UP or OSC DOWN key to adjust the position of waveform M Mp 601 6my Figure 37 Waveform Mathematics Setting the Trigger The trigger defines the start time for data acquisition and waveform display When beginning to acquire data the oscilloscope collects sufficient data to draw the waveform at the left side of the triggering point After a trigger is detected the oscilloscope gathers enough data to draw the waveform at the right side of the triggering point To configure a trigger mode setting i 2 3 Press the MENU key and the function menu will appear at the right of the screen Press the MENU UP or MENU DOWN key to select TRIG MODE and fiv
7. Function Setting Menu 40 Automatic Measurements 40 Cursor Measurements 41 System State Menu 43 Setting Time Base Mode 44 Data Transmission PC Interface 45 Trouble Shooting 46 Appendix 47 Appendix and Specifications 47 Oscilloscope 47 Meter 49 General Specifications 50 Appendix B Maintenance and Cleaning 51 Common Maintenance 51 Storage of Oscilloscope 51 Replacing the Lithium Battery Unit 51 4 MS 400 Version 2 0 December 2007 Safety Information Note Please read this user manual prior to operating the unit Safety Terms and Symbols Specific Warning and Caution terms that appear throughout the manual Warning Warning identifies conditions and actions that pose hazards to users Caution Caution identifies conditions and actions that may damage the product Terms printed on the meter and contained in this manual The following terms may appear on the product or anywhere throughout the associated manuals Danger The term Danger is used in this manual to indicate that serious injury or death may result if the safety instructions are not followed Warning The term Warning is used in this manual to indicate that personal injury may result if instructions are not followed Notice The term Notice is used in this manual to indicate that damages to product other properties or accessories may result if instructions are not followed Symbols Used on this Product and in the documentation Th
8. Vertical System Horizontal System and Trigger Position 14 Resetting the Oscilloscope 17 Input Connections 17 Displaying an Unknown Signal with Auto Set 18 Automatic Zero ing of Trigger Horizontal Position and Trigger Level Position 18 Automatic Measurements 18 Freezing the Screen 19 Using Average for Smoothing Waveforms 19 Using Persistence to Display Waveforms 20 Using Peak Detection to Display Glitches 20 Selecting AC coupling 21 Reversing the Polarity of the Displayed Waveform 22 Using Waveform Math Functions 23 Using the Multimeter 24 About this Chapter 24 Meter Connections 24 Multimeter Operation Window 24 Multimeter Measurements 26 Measuring Resistance Values 26 Diode Measurement 26 Continuity Tests 26 Capacitance Measurement 27 DC Voltage Measurement 27 AC Voltage Measurement 27 DC Current Measurement 28 AC Current Measurement 28 Freezing the Readings 29 Taking a Relative Measurement 29 Selecting Automatic Manual Range Adjustment 30 3 MS400 Version 2 0 December 2007 Advanced Oscilloscope FUNCTIONS 31 About this Chapter 31 Setting the Vertical CH1 and CH2 31 Setting the Channel Coupling 32 Enabling the Scope Channels 33 Adjusting the Probe Scale 33 Inverting a Waveform 33 Math Function Menu Settings 33 Setting the Trigger System 34 Triggering Control 35 Edge Triggering 35 Video Triggering 36 Acquire Mode Setting 37 Display Settings 37 Display Style 38 Persistence Mode 38 XY Mode 39 Saving Waveforms 39
9. by two cursors the window size will vary Press the OSC OPTION key to view the TIME use the OSC LEFT and OSC RIGHT keys to adjust the window position defined by two cursors the window position is the time difference of the window center to the main time base s horizontal pointer Press F3 select window extension the defined window extends to a full screen display Jp 3 240u VY 1 4400 Figure 48 Window Setting 44 MS 400 Version 2 0 December 2007 Wp 5 460u U 1440y Figure 49 Window Extension Data Transmission 1 Press the MENU key to display the function menu on the right side of the screen 2 Press the MENU UP or the MENU DOWN key to select the DISP SET mode four options appear at the bottom of the display Press the F4 key and select Bitmap or Vectors for data transmission Use the supplied cable to connect the meter to the PC Open the supplied software program on the PC Sw SS Set the parameters according to the Software User Guide or from the Help Utility available inside the software program to start data transmission 45 MS 400 Version 2 0 December 2007 Troubleshooting 1 The oscilloscope will not Power ON The battery may need recharging The oscilloscope will not start even if it is powered by the battery charger First charge the battery completely and then supply the oscilloscope with power through the battery charger However do not switch on the oscilloscope s power for fifteen m
10. interval Single 1 sampling interval T measurement time 100ppmxreading 0 6ns accuracy full bandwidth gt average 16 1 sampling interval time 100ppmxreading 0 4ns 47 MS 400 Version 2 0 December 2007 Vertical both channels synchronously 50V 500mV 5V 1V 5mV 200mV Low frequency response AD 25Hz at the BNC coupling 3dB Rise time typical one at the lt 17 5ns BNC DC measurement accuracy The voltage difference V between any two points average value sampling mode on the Waveform after averaging the captured waveforms more than16 5 reading 0 05 divisions Trigger Trigger sensitivity Edge DC CH1 and CH2 1div DC full bandwidth triggering coupling AC Same as the DC coupling when it is equal to coupling or larger than 50Hz Triggering level range a 6 divisions from the screen center Triggering level accuracy 0 3 divisions typical which is applicable to the signal with rise and fall time equal to or longer than 20ns Trigger displacement 655 divisions for pre triggering and 4 divisions for post triggering Make a 50 level setting Operation with the input signal frequency equal to or Typical larger than 50Hz Trigger sensitivity Video 2 divisions of peak to peak value triggering and typical mode Signal system and line field Supports the NTSC PAL and SECAM broadcasting frequency Video triggering systems of any field or line frequency mode Measure
11. leads to the test points If the resistance value of the tested point is less than 500 an audible beep will sound Figure 23 Continuity 26 MS400 Version 2 0 December 2007 Making a Capacitance Measurement To measure a Capacitance 1 2 3 Press the R key and R appears on the top of the screen Press the AUTO SET key till C appears at the top of the screen Insert the capacitor into the square jack and the screen will show the capacitance reading Note When the measured value is less than 5nF use the low capacitance mode of the multimeter and the relative value measuring mode to improve measurement precision If the capacitance measurement is larger than 40uF the calculation will take about thirty seconds Making a DC Voltage Measurement To measure a DC voltage do the following k 2 Press the V key and DCV appears at the top of the screen Insert the black lead into the COM banana jack input and the red lead into the V Q banana jack input Connect the red and black test leads to the measurement points and the measured voltage value will display on the screen Making a AC Voltage Measurement To measure AC voltage 1 2 3 Press the V key and DCV appears at the top of the screen Press the AUTO SET key and ACV appears at the top of the screen Insert the black lead into the COM banana jack input and the red lead into the V Q banana jack input Connect the red and black test lead
12. mode In this mode the oscilloscope cannot acquire the Waveform until it is triggered If there is no trigger the oscilloscope will display the original Waveform without new Waveforms being captured and or displayed Single shot mode In this mode the oscilloscope will detect a trigger and capture a Waveform each time the operator presses the RUN STOP key Acquiring Mode Settings The Acquiring Mode menu is described in the table shown below ee Sampling a Normal sampling mode Peak Detection LT Used to detect a glitch Average Value Used to reduce random and unrelated noise Several average factors are available Average Factor 4 16 64 Select the average factor or 128 Display Settings The Display Setting menu is described in the following table eee Type Vector The vector fills the spaces between neighboring sampling points to form a line on the display Only the sample points are displayed Persistence Set Persistence time for each sampling point Display format Displays the relative relationship between vertical voltage and horizontal time Display CH1 on the horizontal axis and CH2 on the vertical axis Communication Bitmap The data is transmitted as a bitmap Vector The data is transmitted as a vector 37 MS400 Version 2 0 December 2007 Display Style The display styles include Vector and Dot as shown in Figures 41 amp 42 fF SOHZ f SOHZ Figure 42 Vector Style Persiste
13. on the bottom Press MENU again to hide the Function Menu 2 Press the MENU UP or MENU DOWN key to select various function menus 3 Choose a key from F1 to F5 to change the function setting 1 005kH2 f 1 665KH Figure 5 the Tools Menus 13 MS400 Version 2 0 December 2007 Manually Setting the Vertical System Horizontal System and Trigger Position Using the four keys OSC LEFT OSC RIGHT OSC UP and OSC DOWN the user can make the following settings by pressing OSC OPTION The settings include Voltage Unit Scale for Channel 1 CH1 VOL Voltage Unit Scale for Channel 2 CH2 VOL Primary Time base TIME BASE zero point position for 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 the OSC OPTION key 1 Press the OSC OPTION key once the following is displayed at the bottom left side of the screen as shown in figure 6 LEFT RIGHT Time Base UP DOWN CH1 Volts Div P 1 117KH2Z Vp 160 Base Figure 6 Voltage Unit Scale of Channel 1 2 Press the key OSC UP or OSC DOWN to adjust the vertical scale of Channel 1 and press OSC LIFT or OSC RIGHT 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 figure 7 LEFT RIGHT Time Base UP DOWN CH2 Volts Div 14 MS400 Version 2 0 December
14. screen are mA and 20A press F4 or F5 to switch the measurement between mA and 20A Press the AUTO SET key once and ACA will be visible at the top of the screen Insert the black lead into the COM banana jack input and the red lead into the mA banana jack input Connect the red and black test leads to the measurement point and the AC current value Manual JA Ato mA 20A will be displayed on the screen Figure 29 AC Current Measurement 28 MS 400 Version 2 0 December 2007 To measure AC current larger than 400mA 1 Press the AUTO SET key once and ACA will be visible at the top of the screen 2 Press F5 to select 20A the units for the main reading window will be A 3 Press the AUTO SET key once and ACA will be visible at the top of the screen 4 Plug the current extended module into the current measurement jack and plug the test leads into the shunt 5 Connect the red and black test leads in series to the measurement points and the AC current value will be displayed on the screen 6 Press F4 to return to the 400mA measurement mode Freezing a Displayed Reading Freeze the displayed readings at any time 1 Press the RUN STOP key to freeze the screen STOP will be displayed at the top right of the screen 2 Press the RUN STOP key again to resume measuremenis Figure 31 Freezing the Readings Taking a Relative Measurement A reading relative to a reference value is displayed in the relative measure
15. the Oscilloscope If the oscilloscope is to be stored for a long time the lithium battery must be fully charged before storage Charging the Oscilloscope The lithium battery may not arrive fully charged when it Is first received by the customer To properly charge the battery it must be charged for 4 hours the oscilloscope must be turned off during charging The battery can supply power for 4 hours after being charged completely When utilizing battery power a battery charge indicator is displayed on the top of the screen to show the battery s remaining power level The symbols that may appear include E a and 0 where i shows that the battery can only be used for about 5 minutes To charge the battery and power the instrument connect the oscilloscope using a power adapter according to Figure 2 to charge the battery The charging speed can be increased by turning off the oscilloscope Notice To avoid overheating the battery during charging the environmental temperature should not exceed the temperatures listed in the technical Specifications section Note Once the battery is fully charged the charger will automatically switch itself to a slower charging rate thus eliminating the need to turn off the charger at the time the battery is fully charged Replacing the Lithium Battery Unit It is usually not required to replace the battery unit But when it is required to be replaced only qualified personnel should carry out this operat
16. to enter the measurement functions The oscilloscope powers up in the last setup configuration Oscilloscope Operation Window 20 T 19 z a 18 iT z CH2 1 004 jE 14 12 10 Figure 4 Oscilloscope Operation Window 11 MS400 Version 2 0 December 2007 10 11 12 13 14 15 16 17 18 19 20 Battery power level indicator symbols including i y a and 0 Auto measurement window No 1 where f is frequency T is cycle V is the average value Vp the peak peak value and Vk the root mean square value Auto measurement window No 2 The pointer indicates the horizontal triggering position 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 The trigger state indicates the following information Auto The oscilloscope is in the automatic mode and displaying the waveform in the non trigger mode Trig d The oscilloscope has detected a trigger and is collecting the information generated after the trigger Ready All pre triggered data have been captured and the oscilloscope is ready to receive trigger signals Scan The oscilloscope can gather display the waveform data continuously in scan mode Stop The oscilloscope has stopped collecting the waveform data The green pointer shows the trigger voltage level A hidden style menu With the M
17. CH2 200m Figure 44 Automatic Measurements Cursor Measurements This oscilloscope allows the user to make manual cursor measurements of 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 Settings Description menus Type Close Closes the cursor measurement Voltage Displays the voltage cursor and menu Time Displays the time cursor and menu Signal CH1 CH2 ATH Selects the Waveform channel on which the sources address A and cursor measurement will be performed address B 41 MS 400 Version 2 0 December 2007 To make a voltage measurement on CH1 perform the following 1 2 3 Press the MENU key the function menu will appear at the right of the screen Press the MENU UP or MENU DOWN key to select CURS MEAS Two options are shown at the bottom of the screen Press the F1 key to select the measurement type Voltage Two purple crossing dashed lines V1 and V2 are shown on the screen Press the F2 key to select the measured channel CH1 Press and hold the OSC OPTION key till the UP DOWN CURSOR 1 is visible on the screen At this time adjust OSC UP or OSC DOWN and the dashed line V1 is shown moving up and down while the measured voltage value of V1 relative to the zero position of CH1 appears on the screen Press and hold the OSC OPTION key until the UP DOWN CU
18. ENU key pressed the user can view or hide the menu Menu setting options Various setting options for available menus The value of the trigger voltage level The display shows the trigger signal source The reading gives the value of the primary time base These graphics present the coupling modes of channel 2 CH2 The graphic indicates AC the graphic indicates DC This reading shows the vertical Voltage Unit Scale of CH2 These graphics show the coupling mode of CH1 the graphic expresses and indicates AC the graphic indicates DC This reading shows the vertical Voltage Unit Scale of CH1 The blue pointer gives the grounding data point for the waveform on CH2 which is the zero position of CH2 If this pointer does not display then the channel has not been opened OSC OPTION operation prompt There are various prompts for the available OSC OPTION operations The red pointer gives the grounding data point for the waveform on CH1 which is the zero position of CH1 No display of this pointer indicates that the channel has not been opened Waveform display area Red waveform represents CH1 blue waveform represents CH2 12 MS400 Version 2 0 December 2007 Navigating a Menu The following example shows how to use the tool s menus to select a function as shown in figure 5 1 Press the MENU key to display the Function Menu on the right of the screen and the corresponding optional settings
19. H2 100m De Figure 16 Peak Detection 20 MS400 Version 2 0 December 2007 Term Glossary Collecting mode The oscilloscope transforms the collected analog data into a digital form after it is gathered in the following three modes sampling peak value detection and averaging values Sampling The oscilloscope takes samples from the signal at equal time intervals to reconstruct the waveform In this mode the analog signal can be expressed correctly in most cases However rapid changes cannot be detected between two sampling time intervals 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 Thus the oscilloscope may capture narrow pulses that could not be detected in sampling mode Averaging values The oscilloscope collects several Waveforms averages them and displays the averaged Waveform In this mode random noise can be reduced Duration time When a new Waveform is displayed the previous Waveform shown on the screen does not disappear immediately but will continue to be displayed for a period of time This period of time is referred to as the duration time Thus a display similar to that shown by an analog oscilloscope can be achieved Roll scan mode The oscilloscope updates the Waveform sampling points by scrolling through the screen from left to right only applicable to the primary time base setting abov
20. H2 on the screen The Mathematical functions perform a point to point calculation on Waveforms for CH1 and CH2 To use a Mathematical function 1 2 Press the MENU key and the function menu will display at the right side of the screen Press the MENU UP or MENU DOWN key to select the WAVE MATH Five selectable items appear at the bottom of the screen Press F3 to select CH1 CH2 and the calculated waveform M green appears on the screen Press the F3 key to close the Waveform Calculation Press the OSC OPTION key and the following will be visible at the bottom left side of the screen LEFT RIGHT Time UP DOWN CHM Zero Then press the OSC UP or the OSC DOWN key to adjust the vertical position of the calculated waveform M displayed on the screen Press the OSC OPTION key and the following will appear at the bottom left side of the screen LEFT RIGHT Time Base UP DOWN CHM Vol Press the OSC UP or OSC DOWN key to adjust the displayed amplitude of the calculated waveform M Mp 601 6my Figure 19 Waveform Mathematics 23 MS400 Version 2 0 December 2007 Using the Multimeter About this Chapter This chapter provides step by step introductions for the multi meter functions The introduction gives basic examples on how to use the menus and perform basic operations Meter Connections Use the three 4 mm safety banana jack inputs for the Meter functions COM V Q mA Two square capacitance jacks CX See Figure 2 for the p
21. RSOR 2 appears on the screen Now adjust OSC UP or OSC DOWN and the dashed line V2 will appear 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 The user can view a screen that looks similar to the following Figure 45 Figure 45 Use the Cursor for a Voltage Measurement To use the cursor for a time measurement on CH1 perform the following 1 2 3 Press the MENU key the function menu will appear at the right of the screen Press the MENU UP or MENU DOWN key to select Cursor Measurement Two key labels are shown at the bottom of the screen Press the F1 key for measurement type Time Two vertical dashed lines T1 and T2 appear on the screen Press the F2 key to jump to the measured channel CH1 Press and hold the OSC OPTION key until the UP DOWN CURSOR 1 appears on the screen Then adjust OSC UP or OSC DOWN to 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 Keep pressing the OSC OPTION key until UP DOWN CURSOR 2 is displayed on the screen Then adjust OSC UP or OSC DOWN so 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 Observe the absolute time values and frequencies for T1 and T2
22. and whether the trigger level is out of the Waveform range In such a condition adjust the middle trigger level or select the non auto trigger mode Additionally press the AUTO SET key 7 The display speed is unusually slow when attempting to select the average sampling in the sampling mode or while selecting a longer display time in the display mode for the oscilloscope This is normal 46 MS 400 Version 2 0 December 2007 Appendix Appendix A Specifications Oscilloscope All technical specifications are applicable with the probe set to the 10X attenuation switch setting unless otherwise noted In order for the instrument to maintain these specifications the oscilloscope should meet the following requirements The instrument should operate continuously for more than 30 minutes under specified operating environmental temperatures m lf the variation in ambient temperature is equal to or greater than 5 degrees Celsius open the system function menu and perform a self calibration Sampling Sampling modes Normal sampling Peak detection Average value Sampling rate 100 MS s Input 1MQ 2 connected in parallel with 20pF 3pF Horizontal Sampling rate range 10S s 100MS s Record length 6K points on each channel Scanning speed range S div 5ns div 5s div stepping in the 1 2 5 5 mode Sampling rate and relay time 100ppm any time interval which is equal to or larger accuracy than 1ms Time
23. e 50ms Selecting AC Coupling After a reset the Oscilloscope is dc coupled so that ac and dc voltages appear on the screen Use ac coupling to observe small ac signals that ride on a dc signal To select ac coupling 1 Press the MENU key and the function menu will appear at the right side of the screen 2 Press the MENU UP or the MENU DOWN key to select the CH1 SETUP Four selectable items 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 The user can view a screen that looks similar to the following Figure 17 Figure 17 AC Coupling 241 MS 400 Version 2 0 December 2007 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 will appear at the right side of the screen 2 Press the MENU UP or MENU DOWN key to select CH1 SETUP Four selectable items are displayed at the bottom of the screen 3 Press the F4 key to jump to Inverted The inverted waveform of CH1 is displayed on the screen Figure 18 Inverted 22 MS400 Version 2 0 December 2007 Using Waveform Mathematical 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 C
24. e following symbols may be found on the meter and in associated documentation High Voltage Refer to Protective Measurement Casing User Manual Ground Ground Ground A A P S General Safety Information Carefully read the following safety information in order to avoid any personal injury and damage to this product or to any products associated with its use In order to lessen the chances of any possible dangers that may occur in connection with the use of this product the product should only be used in the specified applications the product was designed and intended for LN Warning To avoid fire or electrical shock please use the proper power adapter Use only the power adapter recommended by the manufacturer Warning If test tool inputs are connected to more than 42V peak 30Vrms or used in circuits of more than 4800VA adhere to the following guidelines in order to avoid fire or electrical shock Use only insulated voltage probes test leads and the adapter supplied with the test tool or indicated by Extech as suitable for the Oscilloscope amp Multimeter Before use inspect voltage probes test leads and accessories for mechanical damage and replace when required Remove all probes test leads and accessories that are not in use 5 MS400 Version 2 0 December 2007 Always connect the power adapter first to the AC outlet before connecting it to the Oscilloscope amp Multimeter Do not apply voltages that dif
25. e selectable items will be displayed at the bottom of the screen Use the F1 through F5 keys to make selections Press the OSC OPTION key and the following will be shown on the screen LEFT RIGHT Time UP DOWN Trig Press the OSC UP or OSC DOWN key to adjust the trigger level positions 34 MS400 Version 2 0 December 2007 1 005KH2 f Triggering Control There are two triggering modes Edge and Video Each trigger mode is set by menu functions Edge triggering occurs when the trigger input passes through a given level in the specified direction Figure 38 Edge Trigger Video triggering Perform video field trigger or line trigger on standard video signals The following describes the Edge and Video triggering menus respectively Edge Triggering With Edge triggering selected the trigger occurs on the rising or falling edge of the input signal if the triggering threshold is met The Edge triggering menu Description Fall Triggering on the falling edge of the signal source CH2 CH2 is used as the trigger source Trigger Auto mode Normal Single Shot Coupling AC DC HF suppression LF suppression Acquisition of waveforms is possible even if there is no triggering condition detected Acquisition of waveforms can only be performed when the triggering condition is satisfied The sampling is performed on a waveform when one trigger is detected then sampling ceases With this mode select
26. eck the accessory list and pictures of the parts and accessories included with your instrument Check whether there is any accessory loss by referencing the Appendix In case of any accessory loss damage or variation in specifications contact the organization where the product was purchased Check the Instrument If the instrument is apparently damaged fails in normal operation or in a performance test consult the place of purchase If the instrument is damaged due to shipping keep the packing material in a proper place and contact the place of purchase Contents of the meter kit Meter eS ae Adapter o e o O Two 2 Oscilascope Probes grey l e Pair of Test Leads for Multimeter black andrea e Measuring Extension Module forLow Curent e Measuring Module for tow range Capacitance TAgustment ProbeTool S One 1 USB Data Transmission cable ser mansa o e One 1 disk that includes the PC interface software Carrying Case 7 MS 400 Version 2 0 December 2007 Input Connections Figure 2 Description 1 AC power adapter for AC power supply and battery recharging 2 Multimeter test leads 3 Multimeter input jacks including three circular banana jacks and two 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 5 Oscilloscope channel inputs The upper one is for Channel 1
27. ed the DC component is prevented from passing through All dc components are allowed to pass The HF part of the signal is prohibited and only the LF component is allowed The LF part of the signal is prohibited and only the HF component is allowed to pass 35 MS400 Version 2 0 December 2007 Video Triggering With Video triggering selected the oscilloscope performs NTSC PAL or SECAM standard video signal field and line triggering The user can view a screen that looks similar to the following Figures 39 amp 40 CH2 100m ormat Figure 40 Video Line trigger The Video triggering menu is described in the following table Description Polarity Normal Applicable to the video signal in which the black level is low level Invert Applicable to the video signal of which the black level is high level CH2 Select CH2 as the trigger source Make a video line trigger synchronization setting Field Make a video field trigger synchronization setting 36 MS400 Version 2 0 December 2007 Term Glossary Trigger modes There are three kinds of trigger modes available for this oscilloscope auto normal and single shot Automatic trigger mode In this mode the oscilloscope can acquire a Waveform without any triggering condition detected It will be triggered automatically after waiting a specified period of time When an invalid trigger is sensed the oscilloscope cannot keep the Waveform in phase Normal trigger
28. ertical CH1 and CH2 settings 1 Press the MENU key and the function menu will appear at the right of the screen 2 Press the MENU UP or MENU DOWN key to jump to CH1 SETUP and four options appear at the bottom of the screen 3 Press any key from the F1 key through F4 to adjust the available settings The user can view a screen that looks similar to the following Figure 34 mw CHe l m Figure 34 Setting the Vertical The following Table describes the Vertical Channel menu Description AC The dc component in the input signal is blocked Coupling DC The ac and dc components of the input signal are allowed open Open a channel Select one setting according to the probe attenuation factor to ensure a correct vertical scale reading Invert Close Waveform is displayed normally Open Open the Invert function of the Waveform setting 31 MS400 Version 2 0 December 2007 Setting the Channel Coupling Example CH1 Sine wave signal containing a dc offset Press F1 Coupling first and then press AC for an ac coupling setting The dc component contained in the tested signal is blocked Press F1 Coupling first and then press DC for a dc coupling setting Both dc and ac components contained in the tested signal are permitted The waveform is displayed as in Figures 35 and 36 UP DOWN CH1 Vol L 200w CH2 100m3 Figure 36 DC Coupling 32 MS 400 Version 2 0 December 2007 Enabling the Scope Channels Example for CH1
29. fer more than 400V from earth ground to any input when measuring in a CAT Ill environment Do not apply voltages that differ more than 400V from earth ground to any input when measuring in a CAT II environment Do not apply voltages that differ more than 400V from each other to the isolated input when measuring in a CAT Ill environment Do not apply voltages that differ more than 400V 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 amp Multimeter Do not use exposed metal BNC or banana plug connectors Do not insert metal objects into connectors Always use the Oscilloscope amp Multimeter only in the manner specified Voltage ratings that are mentioned in the warning are provided as limits for working voltage The representative Vac rms 50 60Hz indicates AC sine wave applications and as Vdc for DC applications Overvoltage Category Ill refers to distribution level and fixed installation circuits inside a building Overvoltage Category Il refers to local levels which are applicable for appliances and portable equipment Only qualified technical personnel should perform maintenance Pay attention to the nominal values of all terminals To avoid fire or electric shock please keep a watchful eye on all no
30. he waveform on the screen Primary time base refers to the time values represented by a division in the horizontal direction of the display area Trigger horizontal position is the time deviation between the actual trigger point and the screen central line which will be displayed as O at the center point of the screen Trigger level position represents the voltage deviation between the actual trigger level and the zero position of the triggering signal source channel Resetting the Oscilloscope To reset the Oscilloscope to the factory default settings 1 2 Press the MENU key The function menu appears on the right side of the screen Press the MENU UP or MENU DOWN key to select FUNCTION Three options will be visible at the bottom of the screen Press F1 to select Factory Settings The oscilloscope will revert to the factory settings Figure 11 Reset the Oscilloscope Input Connections fig 2 Examine the bottom and the right side 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 square jack inputs for Multimeter capacitance measurements Isolated inputs allow independent floating measurements between Multimeter and Scope 17 MS400 Version 2 0 December 2007 Displaying an Unknown Signal with Auto Set The Auto Set feature allows the Oscilloscope to displa
31. i User Manual EXT INSTRUMENTS Handheld Digital Storage Oscilloscope amp Multimeter Model MS400 DMM OSC 7 AUTOSET 7RUN STOP CAT II 400V Figure 1 Meter Faceplate Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies to sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or imp
32. imeter Measurements By pressing the DMM OSC key the oscilloscope will switch to the Multimeter mode The screen will display the multimeter windows and at the same time prompt to correctly insert the test leads At this time press any key to enter the multimeter measurement mode 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 Q banana jack input 3 Connect the red and black test leads to the resistor The resistor value is displayed on the screen in Ohms Figure 21 Resistance Measurement Making a Diode Measurement To make a diode measurement 1 Press the R key and R appears at the top of the screen 2 Press the AUTO SET key until the following is displayed am 3 Insert the black lead into the COM banana jack input and the red lead into the V Q banana jack input 4 Connect the red and black leads to the diode and the reading is displayed on the screen in V Figure 22 Diode measurement Making Continuity Tests To perform a Continuity Test do the following 1 Press the R key and R appears on the top of the screen 2 Press the AUTO SET key until the following is shown on the screen o gt 3 Insert the black lead into the COM banana jack input and the red lead into the V Q banana jack input 4 Connect the red and black test
33. inutes If the oscilloscope still will not start please contact Extech Instruments 2 The oscilloscope shuts OFF after operating for only several seconds The battery may need recharging Check the battery symbol at the upper right of the screen The L symbol indicates that the battery has run out of power and must be charged 3 The measurement displays ERR when in the multimeter mode Make sure the instrument is switched to the measuring mode Depress any of the three keys V Aor R The relative measuring mode will then be shown on the screen If ERR is still displayed restart the meter 4 The measured voltage amplitude value is 10 times larger or smaller while in the oscilloscope mode Check whether the channel attenuation factor matches the actual probe ratio 5 In the Oscilloscope mode the Waveform is displayed but is not stable Check whether the setting in the trigger mode menu matches the signal channel indicated Check the trigger mode The edge trigger mode is applicable to normal waveforms and the video trigger mode is applicable to video signals Only when the proper trigger mode is applied can the Waveform stabilize Change the trigger coupling to HF repression and LF repression in order to filter the HF or LF noise 6 There is no display on the screen when the RUN STOP key is pressed while in the oscilloscope mode Check whether the trigger mode in the trigger mode menu is in the Normal or the Single Shot mode
34. ion and the battery should be replaced with the same specified lithium battery 51 MS 400 Version 2 0 December 2007
35. ive Humidity 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 Temperature storage and Relative Humidity 20 to 60 C 4 to 140 F no condensation 50 MS400 Version 2 0 December 2007 Appendix B Maintenance and Cleaning Common Maintenance Do not store or place the instrument in locations where the liquid crystal display LCD may be exposed to direct sunlight for long periods of time In order to avoid damaging the instrument or the probe do not expose to liquids or solvent agents Cleaning Inspect the instrument and the probe frequently in accordance with the product s operating manual Clean the outer surface of the instrument according to the following steps 1 Wipe off obvious dust on the outside of the instrument and on the probe with a soft clean cloth When cleaning the LCD do not scuff the transparent LCD protective screen 2 Wipe the instrument clean while it is in its power off status Use a soft cloth that is moistened but not dripping wet The instrument may be cleaned with mild detergent and fresh water To prevent damage to the instrument or to the probe do not use abrasive chemicals strong detergents or cleansers to clean the product A Warning Before powering and starting the product please confirm that the instrument has completely dried so as to avoid electrical short circuit and personal injury Storing
36. lied Calibration and Repair Services Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Care Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy oe did Support line 781 890 7440 Technical Support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website www extech com Extech Instruments Corporation 285 Bear Hill Rd Waltham MA 02451 2 MS 400 Version 2 0 December 2007 Table of Contents Chapter Page Safety Information 5 Safety Terms and Symbols 5 Specific Warning and Caution Terms 5 Terms Used With This Product 5 Symbols Used With This Product 5 General Safety Information 5 General Inspection 7 Performing a General Inspection 7 Checking for Shipping Damage vs Checking Accessories 7 Complete Instrument Check 7 Contents of the Meter Kit 7 Input Connections 8 Input Connections 8 Description of the Front Panel and Keys 8 Using the Scope 11 About this Chapter 11 Powering Up the Oscilloscope 11 Oscilloscope Operation Window 11 Navigating a Menu 13 Manually Setting the
37. ment Cursor Voltage difference V and time difference T between cursors measurement Auto Peak to peak value average value root mean square value measurement frequency and cycle 48 MS 400 Version 2 0 December 2007 Probe O o 1X position TOX position Bandwidth Up to 6 MHz DC Up to full bandwidth DC Compensation 1 0pf 35pf range Input resistance IMOQ 2 10MQ 2 Input impendence 85pf 115pf 14 5pf 17 5pf Input voltage 150 V DC 300 V DC Meter Voltage VDC Input Impedance 10MQ Max Input Voltage 1000V DC or AC peak to peak value im fom mow oo Voltage VAC Input Impedance 10MQ Max Input Voltage 750V AC virtual value Frequency range from 40Hz to 400Hz Display Virtual value of the sine wave Rae aoa Reon Direct Current DC Alternating Current AC 40 00mA 11 59683 digits 300 0mA 2 1 digit 100uA 20A with adaptor 5 3 digits 49 MS 400 Version 2 0 December 2007 Resistance 400 0 Q 1 3 digits 4 000KQ 1 1 digit 10 Capacitance 3 3 digits 10pF 10nF 100nF Diode Voltage reading 0 V 1 5 V Continuity Test A beep will sound when the resistance is less than 300 General Specifications 320 horizontal x240 vertical pixels Power Adapter Power supply 100 240 V AC 50 60Hz Power output 8 5 VDC Current output 1500 mA Ambient Temperature and Relative Humidity Temperature Operational and Relat
38. ment mode The following example shows how to take a relative measurement First the user must define a reference value 1 Press the R key and R will be displayed on the top of the screen 2 Press the AUTO SET key untill C appears at the top of the screen 3 Plug the capacitance extended module into the capacitance measurement jack 4 When the reading stabilizes press F2 and the triangle icon will be displayed on the top of the screen The saved reference value is displayed below the triangle 5 All subsequent readings will be displayed relative to the stored reference reading Figure 32 Relative Measurement 29 MS400 Version 2 0 December 2007 Selecting Automatic Manual Range The default range mode is the automatic range mode To switch to the manual range perform the following steps 1 Press the F1 key and MANUAL is displayed on the top left side of the screen 2 In manual range mode the measuring range is increased each time F1 is pressed After the highest range is reached the meter will return to the lowest range To return to automatic mode Press the F3 key and AUTO is displayed on the top left side of the screen Figure 33 Automatic Manual Range Adjustment 30 MS400 Version 2 0 December 2007 Advanced Oscilloscope Functions About this Chapter This chapter details the advanced oscilloscope functions Setting the Vertical CH1 and CH2 Each channel can be set independently To change v
39. minal values and marks specified on this product Before any connections are made carefully read the user s manual of the product for further information of nominal values DO NOT operate this product without the instrument cover plate in place If the cover plate or panel has been removed do not perform any operations with this product DO NOT come into contact with bare conductors When the product is powered on do not touch any bare joints or parts of the meter DO NOT operate this product in case of any undetermined failure When in doubt of the cause of any damage to this product consult qualified technical personnel Keep the product well ventilated Refer to the user manual for detailed installation instructions Make sure the product is operated in a well ventilated area DO NOT operate this product in humid conditions DO NOT operate this product where explosives are handled or used Keep the product surface clean and dry 6 MS400 Version 2 0 December 2007 General Inspection After purchasing a new MS400 oscilloscope it is suggested that a general inspection of the instrument be performed according to the following steps Check whether there is any damage to the product caused by shipping If the packing material boxes or foam cushions are found in a damaged condition keep them in a proper place until the complete instrument and accessories have passed electrical and mechanical tests Check the Accessories Double ch
40. nce Mode With the Persistence function selected the displayed data gradually decays in color and the new data is shown bright in color In the infinite persistence mode the recorded points will be kept on the screen until the controlled value is changed 38 MS400 Version 2 0 December 2007 XY Mode With the XY mode selected CH1 is displayed on the horizontal axis and CH2 displayed on the vertical axis When the oscilloscope is in a sampling mode in which no trigger is found the data appear as light spots Operation of various control keys E CH1 Volts and CH1 Zero for CH1 are used to set the horizontal scale and position E CH2 Volts and CH2 Zero for CH2 are used to set the vertical scale and position The following functions do not work in the XY display mode Reference or digital value waveform Cursor Auto Setting Time base control Trigger control Waveform Saving Setup The oscilloscope can save four 4 Waveforms all of which can be displayed on the screen with the present Waveform The recalled Waveform saved in the memory cannot be adjusted The waveform Fon S recalling menu is described in the following list pa eee en ieee hed the displayed Waveform to save source Address a B C and Select the address for saving or recalling a Waveform Store the Waveform of a selected signal source into the selected address _ Close Close or start displaying the Waveforms stored in C Start address A B
41. nts The oscilloscope can perform five 5 types of automatic measurements Frequency Cycle Average value Peak to peak value and Root mean square Two types of measurements can be displayed on the screen simultaneously The function menu for automatic measurements is described in the following table Description CH2 Measures the frequency of CH2 CH2 Measures the cycle of CH1 CH2 Measures the average value of CH2 value CH2 Measures the peak to peak value of CH2 Measures root mean square RMS value of CH1 CH2 Measures root mean square RMS value of CH2 40 MS400 Version 2 0 December 2007 To measure the frequency of CH1 with Measurement 1 and the frequency of CH2 with Measurement 2 perform the following 1 Press the MENU key the function menu will be shown at the right of the screen 2 Press the MENU UP or MENU DOWN key to select MEAS SET1 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 red in color and shows the frequency of CH1 4 Press the MENU UP or MENU DOWN key to select MEAS SET2 Five options appear at the bottom of the screen 5 Press the F4 key to jump to the peak to peak measurement symbolized as CH2 The measurement window on the screen turns blue in color and shows the peak to peak value of CH2 The user can view a screen that looks similar to the following Figure 44 1 1 70KH2Z Vp 632
42. ode users can adjust the positions of Cursor 1 V1 or T1 and Cursor 2 V2 or T2 OSC DOWN Oscilloscope display downward adjustment key OSC UP Oscilloscope display upward adjustment key OSC DMM Press to switch between oscilloscope and multimeter AUTO SET In the Multimeter Mode when performing a current or voltage measurement the user can switch between AC and DC with this key when performing a resistance measurement the user can select resistance diode On Off or a capacitance measurement with this key This key is used for auto setting in the oscilloscope operation mode RUN STOP key for starting or stopping an operation MENU DOWN Move down the menu list MENU Show Hide the menu MENU UP Move up the menu list F1 F5 Switch or Adjustment options for each menu 10 MS400 Version 2 0 December 2007 Using the Scope About this Chapter This chapter provides a step by step introduction to the oscilloscope s functionality 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 Power Up the Oscilloscope Connect the oscilloscope to AC power via the power adapter as shown in Figure 2 Turn the oscilloscope on by pressing the power on off key POW The instrument then performs a self check A greeting window with press any key to continue displays after the self check The user can press any key
43. or the MENU DOWN key to select MEAS SET1 Five selectable items are visible at the bottom of the screen 3 Press the F1 key and select Freq CH1 from the mean square root value item The measurement 1 window turns red in color and shows the frequency for input CH1 To choose a Peak Peak measurement for Input CH2 1 Press the MENU key The function menu is displayed on the right side of the screen 2 Press the MENU UP or the MENU DOWN key and select MEAS SET2 with 5 selectable items displayed at the bottom of the screen 3 Press the F4 key to select PK PK CH2 from Peak Peak item The measurement 2 window turns blue in color and shows the peak peak value for input CH2 f 1 170KHZ Vp 632 Figure 12 Automatic Scope Measurements 18 MS400 Version 2 0 December 2007 Freezing the Screen 1 Press the RUN STOP key to freeze the screen STOP appears at top right side of the screen 2 Press the RUN STOP key once more to resume measurement f 1 117KH2 Cid OFF PiiiM iaibas i E pha thea hha E D jase penas fii ti aiaaiid CHI 8 04 diusi 20m LEFT RIGHT tea Base T UP DOL Mi CH1 Jo I iTi ne P ee Bl SU 0m7 H2 100 my Figure 13 Freezing the Screen Using Average for Smoothing Waveforms To smooth the Waveform 1 Press the MENU key and the function menu will appear on the right side of the screen Press the MENU UP or the MENU DOWN key to select ACQU mode with four selectable items displayed at the b
44. ottom of the screen Press the F3 key to select Average Factors then press F4 to jump to Averages This averages the outcomes of 4 16 64 or 128 acquisitions and shows the final averaging result on the screen shown as in the following figures f 1 005KHZ f 1 005KHZ Figure 14 Average Factor Sampling Mode 19 MS 400 Version 2 0 December 2007 Using Persistence to Display Waveforms You can use Persistence to observe dynamic signals 1 Press the MENU key and the function menu will appear on the right side of the screen 2 Press the MENU UP or the MENU DOWN key to select DISP SET Four selectable items are displayed at the bottom of the screen 3 Press the F2 key to select Persist 1 sec 2 sec and 5 sec Infinite or OFF In this case jump to Infinite and the observed dynamic is kept on the screen continuously When the item OFF is selected the Persistence function is switched off Figure 15 Using Persistence to Observe Dynamic Signals Using Peak Detection to Display Glitches The user can use this function to display events glitches or other asynchronous waveforms of 50 ns or wider 1 Press the MENU key and the function menu will appear at the right side of the screen 2 Press the MENU UP or the MENU DOWN key to select the ACQU MODE Four selectable items are displayed at the bottom of the screen 3 Press the F2 key and jump to Peak Detect LEFT RIGHT Time Base UP DOWN CH1 Vol H1 100m C
45. roper connections Multimeter Operation Window ILITI T cin ciin sinka I an in ee Figure 20 Multimeter Operation Window Description 1 2 Battery power level indictor Manual Auto range indictors Manual refers to the measuring range in manual operation mode and Auto refers to the measuring range in automatic operation mode Measurement mode indicators DCV Direct voltage measurement ACV Alternating voltage measurement DCA Direct current measurement ACA Alternating current measurement R Resistance measurement Ph Diode measurement p a Audible Continuity measurement C Capacitance measurement 24 MS 400 Version 2 0 December 2007 11 12 The relative magnitude measurement indicator Running state indicators among which RUN expresses continuous update and STOP represents the screen lock The reference value of the relative magnitude measurement The multiplying power of the dial indication Multiplying the reading of the dial pointer by the power will yield the measurement result The measurement reading Automatic control measuring range Absolute Relative magnitude measuring control The sign expresses the absolute magnitude measuring control and represents the relative magnitude measuring control Manual measurement range control Test lead indicates the scale of a reading different test modes use various colors 25 MS400 Version 2 0 December 2007 Mult
46. s to the measurement points and the AC voltage value will be displayed on the screen 2 Figure 26 AC Voltage Measurement MS 400 Version 2 0 December 2007 Making a DC Current Measurement To measure DC current less than 400 mA 1 Press the A key and DCA appears at the top of the screen The units on the main reading screen are mA and 20A press F4 or F5 to switch the measurement between mA and 20A Insert the black lead into the COM banana jack input and the red lead into the mA banana jack input i Connect the red and black test leads in series to the measurement points and the DC current value will be displayed on the screen Figure 27 DC Current Measurement To measure DC current larger than 400mA 1 Press the A key and DCA appears at the top of the screen The units on the main reading screen will be mA Press F5 to change to the 20A measurement mode the units on the main reading screen will be A Plug the 20A current shunt into the current measure jack and then plug the probe in the module Connect the red and black test leads in series to the measurement points and the DC current value will be displayed on the screen Press F4 to return to the 400mA measurement mode Figure 28 DC Current Measurement Making an AC Current Measurement To measure AC current less than 400mA 1 Press the A key and DCA appears at the top of the screen The units on the main reading i
47. y and measure unknown signals automatically This function optimizes the position range time base and triggering and assures a Stable display of virtually any waveform This feature is especially useful for quickly checking multiple signals To enable the Auto Set feature 1 Connect the test probe to the signals under test 2 Press the AUTOSET key The Oscilloscope is now in the automatic measurement mode The tested signals appear on the screen Automatic Zero Returning of Trigger Horizontal Position and Trigger Level Position When the trigger horizontal position and trigger level position are adjusted to maximum they will become positioned off screen The following steps will allow the trigger horizontal position and trigger level position to return to zero automatically 1 Press the OSC LEFT key and the OSC RIGHT key simultaneously the trigger horizontal position automatically returns to zero 2 Press the OSC UP and the OSC DOWN buttons simultaneously the trigger level position automatically returns to zero Automatic Measurements The Oscilloscope offers 5 ranges of automatic scope measurements Two numeric readings can be displayed measurement 1 and measurement 2 These readings are selectable independently and the measurements can be performed on the input CH1 or input CH2 waveform To choose a frequency for CHI1 1 Press the MENU key The function menu appears on the right side of the screen 2 Press the MENU UP
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