DT-99S v110610 英文
Contents
1. is displayed if battery voltage drops below operating voltage Battery One7 4V True RMS Multimeter amp Oscillometer User Manual Fuses mA ranges 0 5A 1000V ceramic fast blow A range 10A 1000V ceramic fast blow Operating Temperatur 5 to 40 C 41 F to 104 F Storage Temperature 20 C to 60 C 4 F to 140 F Max 80 up to 31 C 87 F decreasing linearly to 50 at 40 C 104 F 7000ft 2000meters maximum This meter is intended for origin of installation use and protected against the users by double insulation per EN61010 1 and IEC61010 1 2nd Edition 2001 to Category IV 600V and Category Ill 1000V Pollution Degree 2 The meter also meets UL 61010 1 2nd Edition 2004 CAN CSA C22 2 61010 1 2nd Edition 2004 and UL 61010B 2 031 1st Edition 2003 True RMS Multimeter amp Oscillometer User Manual 7 Specifications DC Voltage 0 001mV _ 0 05 20 500mV 0 01mV 0 025 5digits 0 0001V 0 025 5digits 50V 0 001V 0 025 5digits 500 0 01V 0 05 5digits 1000V 0 1 5 AC Voltage 500100002 0 001mV 50 60 2 0 3 25 500mV 0 01mV lt 1KHz 0 5 25 0 0001V lt 5KHz 3 25 0 001V 500 0 01V 1000V 0 1V All AC voltage ranges are specified from 5 of range to 100 of range Range Resolution Accuracy 0 to 1000Hz 0 001mV 1 0 25 500mV 0 01mV 0 0001V S09 ae 1000V 1 40 True RMS Multim2. MAX MIN Starts and stops MIN MAX recording ESC Return from Power off True RMS Multimeter amp Oscillometer User Manual 4 2 Understanding the Display 5 6 7 8 9 1 a 03 26 11 4 Auto Range REL VAC 12 Gi 9 3 0 0 0 0 5A 14 23 2 dBm 15 1 MENU SAVE REL SETUP 1 Soft key labels Indicates the function of the button just below the displayed label 2 Bar graph Analog display of the input signal See the Bar Graph section for more information 3 Minus sign Indicates a negative reading 4 Indicates the range the Meter is in and the ranging mode auto or manual 5 Battery level Indicates the charge level batteries 6 Time Indicates the time set in the internal clock 7 Mode annunciators Indicates the Meter s mode 8 Minimeasurement Displays the lightning bolt when necessary and the input value when the primary and secondary displays are covered by a menu or pop up message 9 Main display Displays measurement information about the input signal 10 Date Indicates the date set in the internal clock 11 Beeper Indicates the Meter s beeper is enabled not associated with the continuity beeper 12 Units Indicates the units of measure N Auxiliary Units Indicates unit less measurements like Crest Factor 13 Remote communication Indicates activity over the communication link 14 Relative Indicates the displayed value is relative to a reference value 15 Secondary displ
3. Gscillometer F Wser Manual 06 02 2011 10 10 55 RUN Save FFT 7 200 KHZ 180 0 HELP mmm Rm a True KMS Multimeter amp Osciliometer F4 IP67 Waterproof vor CAP Hz J 10 Temp 056 7 20A for 30 sec OAT 1v ou weyismn A car 190v 10A s OCHG 4 Please read this manual before switching the unit on Important safety information inside True RMS Multimeter amp Oscillometer User Manual True RMS Multimeter amp Oscillometer User Manual Contents Digital Multimeter TANTO JUGUN T 4 M 4 SX JUR ci jr 5 6 5 Meas rement ANG SOUND cu Mea Ep uda 9 6 General SpecifiCatONS e 28 PSE CMC AMON 30 Oscilloscope SCHON 34 36 iain 38 ofc m 47 Ard i X M 48 Appendix 1 Daily maintenance 50 Appendix 2 Specifications ssssssseseeeeneeennnnnnn nnns 51 True RMS Multimeter amp Oscillometer User Manual Digital Multimeter 1 Introduction This meter measures AC DC Voltage AC DC Current Resistance Capacitance Frequency electrical amp electronic Duty Cycle Diode Te
4. e Function of the clock is supplied by the back up battery inside of the device which can work for 5 to 10 years and irrelevant to the Li ion rechargeable battery Take Operating Instructions For Oscilloscope for reference for the adjustment of clock 2 12 2 Battery Electric Power Display After startup at the top right corner display the working Li ion rechargeable battery electric power picture 2 10 2 e The battery fully charged 4 cells When 1 cell left blue color turn to red warning to recharge 30 to 45 minutes may be used by this left power All cells disappear please recharge promptly 15 to 20 minutes may be used by this left power Picture 2 10 2 2 13 Measuring System The oscilloscope displays forms of voltage relative to time and helps user measure and display waveforms Two ways of measurements can be adopted Scale measurement or cursor measurement 2 13 1 Scale Measurement Fast and direct evaluation can be done by this way for example waveform amplitude can be observed to judge whether it s 0 8V or not By calculating relevant primary and secondary scale division then multiplying by proportion factor simple measurement can be taken For example if four main vertical scale divisions between the waveform peak and base are figured out proportion factor is 200 mV division peak value voltage can be calculated by the following method 4 divisions 200mV div 0 8V 2 13 2 Movement of Curs
5. 4 5 F Probe accuracy not included True RMS Multimeter amp Oscillometer User Manual Oscilloscope Section Introduction Digital Oscilloscope is of compact size powerful and easily operated TFT color LCD display realizing its ease of use which can greatly improve customer s work efficiency Digital Oscilloscope performs outstandingly powerful affordable with a high cost performance Its real time sample rate is up to 50 MSa s can meet the market needs of high capture speed complicated signal supports internal storage and Bluetooth data transmission customer can take repeated measurements and prints of the data graph by upper computer This meter measures AC DC Voltage AC DC Current Resistance Capacitance Frequency electrical amp electronic Duty Cycle Diode Test Insulation Test and Continuity plus Thermocouple Temperature It can store and recall data It features a waterproof rugged design for heavy duty use Proper use and care of this meter will provide many years of reliable service Features e Brand new design compact size simple portability TFT color LCD display waveform display much more clear and stable e Real time sample rate 5008ps 50 Msa s Storage depth 3Kpts Trigger function rising edge falling edge Waveform record Auto search 10 set waveform storage output waveform data can be transmitted by Bluetooth or wireless USB interface to upper computer for further
6. RMS Multimeter amp Oscillometer User Manual 5 16 Measuring AC and DC Signals The Meter is capable of displaying both AC and DC signal components voltage or current as two separate readings or one AC DC RMS value combined As shown in Figure the Meter displays ac and dc combinations two ways DC displayed over AC DC AC and AC combined with dc AC DC Select one of these three displays using the Function and Mode menu With the rotary switch set to V mV A mA or uA press the soft key labeled Menu Move the menu selector to the menu item labeled AC DC At this point three different soft key labels indicate AC DC F1 and DC AC F2 Press the soft key that presents these two signals as needed While any of the three AC DC modes peak measurements frequency duty cycle relative and period measurements are not allowed In addition to these modes MIN MAX relative am 13 16 RT lt am 13 17 _ V Dt C Auto Range V Auto Range 0 0185 VAC MENU SAVE HELP SETUP MEN SAVE HELP SETUP 5 17 Capturing Minimum and Maximum Values The MAX MIN Record mode captures minimum average and maximum input values When the input goes below the recorded minimum value or above the recorded maximum value the Meter beeps and records the new value The Meter stores the elapsed time since the recording session was started at the same time The MAX MIN mode also calculates an average of all readings taken si
7. and verify if the oscilloscope works well or not Please proceed as follows 1 Turn the knob turn on the oscilloscope power 2 Connect the oscilloscope to signal source Various AC signal can be adopted including 110V 220V AC power 3 Press AUTO Corresponding frequency and peak waveformcan be detected several seconds 4 If connect to 110V 220V AC power press w directly indicating 100V div press lt q indicating 1KSa s alternating sine wave can be observed 1 3 Probe and connector 1 3 1 Safety of probe and connector The protective device of probe and connector main part prevents fingers from electric shock Picture 1 6 Before any measurement connect the probe and the connector with the oscilloscope Note To avoid electric shock while using the probe keep the fingers on the back of protective device of the probe main part True RMS Multimeter amp Oscillometer User Manual e To avoid electric shock don t touch the metallic part of the probe top while connecting to voltage source Measured signal by the oscilloscope is taken as a reference voltage to the ground make sure the ground terminal connect to the earth correctly do not cause a short circuit 1 3 2 Probe application 1 Connect the oscilloscope probe with the connector and insert into the input terminal of the device 2 If use probe hooked head make sure the hook end firmly stuck in the probe 3 Probe conn
8. are taken to limit the transient overvoltages to an appropriate low level Note Examples include protected electronic circuits OVERVOLTAGE CATEGORY 11 Equipment of OVERVOLTAGE CATEGORY II is energy consuming equipment to be supplied from the fixed installation Note Examples include household office and laboratory appliances True RMS Multimeter amp Oscillometer User Manual OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations Note Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation Note Examples include electricity meters and primary over current protection equipment 3 Safety Instructions This meter has been designed for safe use but must be operated with caution The rules listed below must be carefully followed for safe operation 3 1 NEVER apply voltage or current to the meter that exceeds the specified maximum Input Protection Limits Function Maximum Input A AC DC 10A 1000V fast acting fuse 20A for 30 seconds max every 15 minutes Frequency Resistance Capacitance 1000VDC AC rms Duty Cycle Diode Test Continuity 1000VDC AC rms Surge Protection 8kV peak per IEC 61010 3 2 USE EXTREME CAUTION when working with high voltages 3 3 00 NOT measure v
9. for triggering Raising edge setup press setup trigger raising edge save and quit Falling edge setup press setup trigger falling edge save and quit elf select setup trigger no trigger save and quit the oscilloscope may lose synchronizing signal and any signal measured by fast display 00 02 02 2 9 Channel e Oscilloscope vertical response should be slightly greater than its bandwidth so that FFT frequency spectrum can be higher than effective frequency of oscilloscope bandwidth However amplitude close to or higher than the bandwidth will not be accurate f channel coupling mode is DC user can measure DC component of signal by observing the difference between waveform and signal ground f coupling mode is AC DC component is filtered in the signal This mode makes user easily display the AC component of signal with higher sensitivity Channel Settings Channel coupling settings Measured signal is sinusoidal signal containing DC bias e Press setup coupling AC select AC coupling mode DC component in measured signal is separated Press setup coupling select DC coupling mode DC and AC component in measured signal can all pass 2 10 FFT frequency spectrum analysis Time signal can be converted into frequency component frequency spectrum by using FFT mathematical operation Fast Fourier Transform Observe followi
10. frequency value will appear in the primary display with the ac voltage value in the secondary display 4 5 Softkey Labels Labels for the four function softkeys F1 through F4 appear in the bottom row of the display These labels will change based on the function and or menu selection 4 6 Understanding the Rotary Switch Select a primary measurement function by positioning the rotary switch to one of the icons around its perimeter For each function the Meter presents a standard display for that function range measurement units and modifiers Button choices made in one function do not carry over into another function AC voltage measurements Q cap Resistance Diode test Capacitance and Continuity measurements Temperature measurements AC DC and AC DC amps measurements AC DC and AC DC milliamps measurements AC DC and AC DC microampere measurements up to 5 000uA 4 7 Using the Input Terminals All functions except current use the VOHMSand COM input terminals The two current input terminals A and Used as follows Current from 0 to 500 mA use the uAmA and COM terminals Current between 0 and 10 A use the A and COM terminals 108 Input for 0 A to 10 00 A current 20VA overload for 30 seconds on 10 minutes off E Input for 0 A to 500 mA current measurements com Return terminal for all measurements Input for voltage continuity resistance diode test conductance P Temp c
11. the time cycle between the two cursor press MODE read corresponding frequency 2 measure signal peak value e Press F1 V F cursor after step 1 switch to horizontal cursors press A or w to move up cursor e Press MODE to switch cursor press or wW to move down cursor Read the voltage value between two cursors True RMS Multimeter amp Oscillometer User Manual 3 3 Serial Signal Measurement To measure serial signals as UART SPI and etc please take following steps 1 Take 3 1 operations as reference preliminary observe the measured signal 2 Press REC while signal transmission 3 Press NEXT or Previous according to prompt bar on the screen to check corresponding page 4 Take 3 2 1 operations as reference press gt lt and MODE to move the cursor signal frequency can be measured 3 4 Analyze AC signal by FFT Observe amplifying circuit in device analyze output harmonic component and observe its distortion by FFT To adopt FFT function following steps can be taken 1 Connect the input end of the amplifying circuit to sine wave signal 2 Connect the oscilloscope probe to output end of amplifying circuit 3 Take 3 1 operations as reference proper signal can be observed 4 Press F4 FFT observe frequency spectrum of output waveform for amplifying circuit after Fast Fourier Transform 5 Adjust the input signal source of amplify
12. through the save menu Press E the softkey labeled Save Position the menu 0 0000 selector next to the menu item labeled View Min record and press the softkey labeled View Start times 03 24 11 14 57 41 If there are previously stored records press boi the softkey labeled Prev to page back through previously stored records Press the softkey labeled Next to page in the other direction Press Close to return to normal Meter operation Press the soft key labeled Trend to display WU 1522 ONG the recorded data in a trend plot view 15 ae NE 9 04 30 Press the softkey labeled Delete recorded data oe 9 0 15 00 00 00 15 00 30 00 45 01 00 0 0003 vdc 13 21 14 DELETE SUMMARY CLOSE True RMS Multimeter amp Oscillometer User Manual 5 25 Recording Measurement Data The Meter s record feature collects measurement information over a user specified duration This collection of information is called a recording session A recording session is made up of one or more measurement records Each record contains measurement summary information covering the duration of the record 13 19 03 26 11 wj Press the softkey labeled Save Position the VDC menu selector next to the menu item labeled E Record and press the softkey labeled Record 0 0008 to open the configuration display cepe OSet Sample Interval 00Min 01Sec Memory available 99 ED
13. to change trigger mode to falling edge or raising edge waveform can not stabilize in no trigger state 3 Try to change button weak signal is vulnerable to be interfered and emits unstable waveform 4 3Waveform appears ladder shape Normal phenomenon Level time base gear may not be proper adjust horizontal time base to raise the level resolution display improved True RMS Multimeter amp Oscillometer User Manual Appendix 1 Daily maintenance While store or place the device please don t make LCD display surface exposed to direct sunlight for long time Note to avoid device or probe damage please don t place it in fog condition liquid or dissolvent Cleaning Verify the device and probe frequently according to operation times Please clean outside surface of the device by following steps 1 Wipe dust of external part of the device and probe with soft cloth While cleaning the LCD screen pay attention not to scratch the transparent plastic protection screen 2 Clean the device with a water soaked cloth note to disconnect the power If a more thorough clean is needed 75 isopropanol water dissolvent can be used Note To avoid device or probe damage any abradant reagent or chemical cleaning reagent can not be adopted Before cleaning the device please make sure to disconnect all lines Appendix 2 Specifications True RMS Multimeter amp Oscillometer User Manual Function Main spe
14. voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the green mV position 2 Press the soft key labeled Menu Move the menu selector to the menu item labeled mVDC mVAC Press the soft key mVDC mVAC 3 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 4 Read the mV voltage in the display True RMS Multimeter amp Oscillometer User Manual 5 6 Temperature Measurements 1 Set the function switch to the green TEMP C or F position 2 press the soft key labeled Menu Move the menu selector to the menu item labeled TEMP Press the soft key TEMP C or F 3 Insert the Temperature Probe into the input jacks making sure to observe the correct polarity 4 Read the temperature in the display 5 To input a temperature offset value press the softkey labeled Offset to open a message box with the present offset value Use and gt to position the cursor over one of the digits or the polarity sign Use A and to scroll through the numbers for each digit in the offset or switch between or offset With the desired value displayed press the softkey labeled OK to set the temperature offset 5 7 Frequency Measurements 1 Set the function switch to the green 7 position 2 Insert the black test lead banana plug into the negative COM jack
15. IT START CANCEL Recording session duration and sample interval duration Both variables affect the recording length and number of intervals recorded These two variables may interact in that setting one variable may adjust the other variable to fit the recording session within the available memory The percentage of memory available at the beginning of a recording session is displayed below the duration and sample interval settings To change either of the two recording variables use the cursor buttons to position the menu selector next to the desired menu item and press the softkey labeled Edit Use A and gt to move between and set each digit of the selected variable Press the softkey labeled Start to start records The recording session will continue until the allocated memory is used the batteries expire the rotary switch is moved or the session is terminated by pressing the softkey labeled Stop 5 26 Zooming in on Trend Data While viewing trend data pressing or zooms in or out respectively on the data around the cursor Each press of reduces the x axis time period by one half to reveal more details Each press of doubles the time period until all the recorded data is displayed The zoom level is displayed in the upper right hand corner of the display True RMS Multimeter amp Oscillometer User Manual 5 27 Changing Meter Setup Options The Meter has a number of preset features such as date and time formats and battery s
16. Insert the red test lead banana plug into the positive V jack 3 Read the Frequency in the display True RMS Multimeter amp Oscillometer User Manual 5 8 Resistance Measurements WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements Remove the batteries and unplug the line cords 1 Set the function switch to the green CAP position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive Jack 3 Read the resistance in the display True RMS Multimeter amp Oscillometer User Manual 5 9 Continuity Check WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements Remove the batteries and unplug the line cords 1 Set the function switch to the green CAP gt position 2 Press the soft key labeled Menu Move the menu selector to the menu item labeled Beeper Press the soft key Beeper 3 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive jack 4 If the resistance is less than approximately 250 the audible signal will sound If the circuit is open the display will indicate OL True RMS Multimeter amp Oscillometer User Manual 5 10 Diode Test 1 Set the function switch to the gree
17. Slow turns to yellow at status bar of interface means activated elf press again switch back to fast display Fast turns to yellow means fast display activated Default fast display after start up 2 6 Vertical System Press A V to adjust vertical system default attenuation ratio that is preselected frequency xxV div of adjusting input end after start up presents the status of last shutdown While selecting DC coupling as direct current exist in waveform it may turn to one side press switch function of A to adjust waveform up and down position make the waveform back to middle position by pressing a W for convenient observation and measurement 2 1 Horizontal system e Press lt q gt to adjust horizontal system default adjust of sample rate after startup that is 5 5 e Press MODE then lt q if user wants to change the trigger horizontal position in memory trigger displacement 2 8 Trigger System Trigger function confirms the time of collecting data and displaying waveform for the oscilloscope After correctly set up the trigger the oscilloscope can switch unstable displayed result to meaningful waveform True RMS Multimeter amp Oscillometer User Manual 2 8 1 Trigger Mode 2 kinds of trigger mode for the oscilloscope raising edge and falling edge When signal voltage across trigger electrical level raising and falling edge of input signal is adopted
18. an be used in mobile state This section presents how to accomplish the following works e Get the general knowledge of front panel and user interface of Digital Oscilloscope Brief function check 1 1 General knowledge of front panel and user interface of Digital Oscilloscope Before operating Digital Oscilloscope need to know the front operational panel of the oscilloscope The following content makes a brief description and introduction of operation procedures and functions of the meter front panel enable the user to be familiar with the meter in minimal time Digital Oscilloscope provides a simple but with clear function front panel to make sure the convenience of basic operation to user The front panel includes 4 function keys F1 F4 4 direction keys 4 selection keys HOLD MODE AUTO REC user can enter into different functional menus or directly obtain specific function applications by using these keys Picture 1 1 operation panel True RMS Multimeter amp Oscillometer User Manual 1 Date and time 2 Status of current waveform windows 3 Remaining power of battery 4 Waveform display area 5 Waveform peak value 6 Signal coupling marks preset amplitude gear 7 Waveform measured frequency 8 Preset sample rate 9 Trigger mode mark 10 Fast display mark 11 Slow display mark 12 Operation prompt bar Picture 1 2 interface display 1 2 Brief function examination Perform a fast function examination to test
19. apacitance True RMS Multimeter amp Oscillometer User Manual 5 Measurement and Setup 5 1 DC Voltage Measurements CAUTION Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the green VDC position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 3 Read the voltage in the display True RMS Multimeter amp Oscillometer User Manual 5 2 AC Voltage Measurements WARNING Risk of Electrocution The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets As a result the reading may show 0 volts when the outlet actually has voltage on it Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present CAUTION Do not measure AC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the green VAC position 2 press the soft key labeled Menu Move the menu selector to the menu item labeled VAC Press the soft key VAC 3 Insert the black test lead banana plug into the negative COM jack Insert red test lead banana plug into the positive V jack 4 Read the voltage in the main disp
20. ave mode timeouts and the displayed language These variables are referred to as Meter setup options Many setup options affect general Meter operations and are active in all functions Others are limited toone function or group of functions 03 26 11 wi Access to the setup options is always available through the am VDC Auto Range softkey labeled Setup Information about the Meter such as T serial number model for example is also accessed 0 001 0 through the setup menu cnm qeu Meter Info Communicate O Instrument O Display RESET HELP CLOSE 5 28 Resetting Meter Setup Options The Meter s setup options can be reset to default values through the setup menu Open the setup menu by pressing the softkey labeled Setup Position the menu selector next to the menu item labeled Reset and press the softkey labeled Setup A message will appear asking to confirm the reset action Press the softkey labeled OK to perform the reset 5 29 Meter Info The Meter Info selection lists the serial number model number firmware version Calibration date and calibration counter Operator name company name are displayed 5 30 Setting the Event Threshold Value Press the softkey labeled Setup to access the setup menu Using the cursor buttons move the menu selector next to the menu item labeled Instrument and press the softkey labeled Enter to open the recording setup screen Using the cursor buttons move the menu select
21. ay Displays secondary measurement information about the input signal 4 3 Bar Graph The analog bar graph functions like the needle on an analog meter but without the overshoot For frequency duty cycle pulse width dBm and crest factor functions the bar graph represents the amplitude of the input signal volts or amps and not the value in the primary display The bar graph is not shown for capacitance temperature AC DC AC over DC peak or min max functions For DC voltage DC current and all relative percent modes a zero centered bar graph is displayed For DC voltage and current the bar graph range is the maximum of the selected range For relative percent mode the bar graph goes to 10 96 The number of lit segments indicates the measured value and is relative to the full scale value of the selected range In the 50 VAC range for example the major divisions on the scale represent 0 5 10 15 20 25 30 35 40 45 and 50 VAC An input of 25 VAC turns on segments up to the middle of the scale True RMS Multimeter amp Oscillometer User Manual 4 4 Page Area The page area of the display is where the main meter content is displayed The primary display upper half of the page area is where the most important value of the selected function is shown The secondary display contains the bar graph and values that may be measured in addition to the primary function value For example with frequency measurement selected in Vac the
22. cification Format or note LCD display 3 5 color TFT LCD 320 X 240 pixels Refresh rate 15 50 V S Fast Slow Bandwidth 10MHz 0 10 MHz Input Coupling AC DC DC Input impedance 1000C CA 1MQ2 2 15pF 2pF Max input voltage 1000V 600V DC AC peak value CAT CAT Il 1MQ2 input impedance Probe attenuation 1X Sampling mode Real time sampling random sampling Single channel 3K Real time sample rate 50MSa s 500pts Sampling resolution 8 bits Record length 3K 10pages SRAM Storage length 10 charts EEPROM Time error 5 s 24hours FFT collect 4 256 points Bluetooth 9600 baud rate transmission rage Li ion battery 8 4V 2300mAH True RMS Multimeter amp Oscillometer User Manual Rev 110610 TA
23. des AutoHold save SETUP operation monitors the input signal and updates the display and if enabled sounds the beeper whenever a new stable measurement is detected A stable measurement is one that does not vary more than a selected adjustable percentage AutoHold threshold for at least one second The Meter filtersout open lead conditions so the Meter leads can be moved between test points without triggering a display update True RMS Multimeter amp Oscillometer User Manual 5 22 Storing Individual Measurement Data 15 18 wee 5 For all measurement functions a snapshot faga ane of the screen data is saved by pressing the Q 0008 softkey labeled Save Edit name then pressing the softkey labeled exe Save stored date save CLOSE 5 23 Viewing Memory Data Viewing data stored in the Meter s memory is performed through the save menu Press the softkey labeled Save Position the menu selector next to the menu item labeled View measure and press the softkey labeled View If there are previously stored records press the softkey labeled Prev to page back through previously stored records Press the softkey labeled Next to page in the other direction press the softkey labeled Delete to delete stored records Press Close to return to normal Meter operation 5 24 Viewing Trend Data Viewing data stored in the Meter s memory oe VDC lt is performed
24. ection mode must be adopted while the measuring frequency of the signal is above 1 Khz 2 Function and Operation In order to operate the oscilloscope efficiently user needs to know the following functions e Interface and buttons Connector and probe e Settings of system Vertical system Horizontal system Trigger system e Signal capture system Display system Measuring system Memory system e Auxiliary system e Online help system 2 1 Interface and Buttons See the following picture Picture 2 1 Please follow the prompts of display interface for the use of F1 F4 HOLD hold key freezes all the readings in the display MODE function key switch switch the cursor and waveform position AUTO auto search key search waveform of unknown frequency or amplitude REC record key record current waveform content the length is 10 pages lt P direction key adjust sample rate preselecting amplitude and etc 01 01 2011 00 02 02 True RMS Multimeter amp Oscillometer User Manual 2 2 Connector Connector is adopted for the connection of probe and oscilloscope the probe and connector must be used when the measuring frequency of waveform is above 1KHz When measured signal is a waveform of DC or its measuring frequency is below 1KHZ the stick of general oscilloscope can be adopted elf the device is suspended don t need to differentiate phase line or null line when measuring indus
25. er information of concerned ratings Don t operate with the cover opened If the cover plate or face plate is removed please don t use the device Use proper fuse wire Only the fuse wires which compliances with specified type and ratings of this product can be adopted Don t operate while suspecting product malfunction If suspect any damage of this device please inform qualified maintenance personnel to examine Avoid circuit exposure Don t touch any bare contact or component after connection of industrial frequency power Please don t operate under an inflammable or explosive circumstance Keep device surface clean and dry True RMS Multimeter amp Oscillometer User Manual Summary The manual introduces operation information of Digital Oscilloscope which includes the following chapters Introduction presents the front panel user interface function check and probe of the oscilloscope Function introduction and operation makes a detailed introduction of oscilloscope function and operation e Application example includes many examples of testing for readers reference e Appendix 1 daily maintenance and cleaning briefly presents how to maintain the oscilloscope Appendix 2 specifications details the specifications of Digital Oscilloscope 1 Introduction Digital Oscilloscope is a small and handy portable device which can measure by taking suspension ground voltage as reference Waterproof function c
26. eter amp Oscillometer User Manual Range DC Current 500pA 0 1 20 15 20 0 0 0 3 20 20A 30 sec max with reduced accuracy Function Current 50 to 10000Hz 500uA 0 01pA 50 60Hz 0 6 25 5000pA lt 1KHz 1 5 25 lt 10KHz 3 25 500 0 01 20A 30 sec max with reduced accuracy All AC current ranges are specified from 596 of range to 10096 of range AC DC 0 to 1000Hz True RMS Multimeter amp Oscillometer User Manual Function um Resolution Accuracy AC Voltage 3 5K 100K sav Tony EU 4 40 a asy NOTE Accuracy is stated at 18 to ES 65 to E less 75 AC switch according to the calibration of sine MA It generally increase 2 reading 2 full scale if non sine wave in the wave crest less than 3 0 Resistance 0 05 10 Function En Capacitance i 2 001nF 2 40 digits 500uF 5 40 digits Tom O0tmF True RMS Multimeter amp Oscillometer User Manual Frequency 0 01 10 electronic Sensitivity 0 8V RMS min 20 to 80 duty cycle and lt 100kHz 5V RMS min 20 to 80 duty cycle and gt 100kHz Frequency 40 00 10kHz 0 01 0 001kHz 0 5 reading electrical Sensitivity 1V RMS Duty Cycle 0 1 to 99 90 0 01 1 2 reading 2digits Pulse width 100us 100ms Frequency 5Hz to 150kHz Resolution Accuracy 50 to 1000 C 0 1 C 1 0 reading 2 5 C 1 0 reading
27. fault continuous sampling state after startup press HOLD if user wants to take static measurement press the same button again to turn back to continuous sampling state REC button if the user needs the oscilloscope to take sample of enough data to analyze a series of numbers press REC the oscilloscope may continuously take data sample of 10 pages for measurement analysis e Time base the oscilloscope takes sample of input signal values at discontinuous points to digitalize the waveform Frequency of value digitalization can be controlled by adopting time base Press lt 4 adjust the time base to a horizontal level to satisfy user s needs False wave phenomenon if the speed of sampling is not fast enough causing inaccurate waveform records false wave phenomenon occur In this case the oscilloscope displays the waveform by a frequency which is below actual input waveform s frequency or triggers and displays unstable waveform Therefore press AUTO to auto search for the first measurement of new signal to confirm the basic frequency of this signal actual high frequency waveform NE low frequency waveform caused by false wave phenomenon sampling point False wave phenomenon True RMS Multimeter amp Oscillometer User Manual 2 12 Display System 2 12 1 Time and Date e After startup actual time and date display at the top left corner on the interface format mm dd yy hh mm ss picture 2 10 1
28. ing circuit observe FFT 6 Press F2 44 lt or F3 gt gt P to adjust position of red cursor read corresponding frequency and amplitude ratio of dominant wave and harmonic wave 3 5 Waveform Save Waveform data save should be operated under static state three ways lead to static state 1 Press HOLD F2 SAVE 2 Press REC 2 3 Press FFT HOLD F1 SAVE Then operate according to screen prompts 4 Fault Processing 4 1 General fault processing 1 If turn the oscilloscope switch to any gear still black screen no any display please operates by following steps 1 The Li ion battery may be used out please recharge it 2 Recharge the battery by matched charger for 5 to 10 minutes try again 3 If still no display Li ion battery may be damaged need to change 2 Press AUTO if waveform of signal doesn t display on the screen please take following Steps 1 Verify if the probe is correctly connected to signal cable 2 Verify if the signal cable is correctly connected to connector 3 Verify if the probe is correctly connected to measured object 4 Verify if the measured object emits signals True RMS Multimeter amp Oscillometer User Manual 5 Press AUTO to try again 4 2 Waveform displays but cannot stabilize 1 Check the trigger option is correct or not Waveform stabilizes only proper trigger mode is operated 2 Try
29. lay True RMS Multimeter amp Oscillometer User Manual 5 3 Making dB Measurements The Meter is capable of displaying voltage as a dB value either relative to 1 milliwatt dBm a reference voltage of 1 volt dBV or a user selectable reference value 1 Set the function switch to the green VAC au 15 14 VER ET position 2 press the softkey labeled Menu Move the 0 0 1 8 6 menu selector to the menu item labeled dBm Press the softkey dBm 3 Insert the black test lead banana plug into the negative COM jack Insert red test lead save Rer setup banana plug into the positive V jack 4 Read the voltage in the main display and the dBm in the Secondary display 5 To select another reference value press the softkey labeled Ref to display a message box with the current reference value Pressing A or scrolls through the nine predefined references 4 8 16 25 32 50 75 600 and 1000 Set the reference by pressing the softkey labeled OK 32 39 5 4 Low Pass Filter 13 14 The Meter is equipped with an ac low pass Pee filter When measuring ac voltage press the 0 0 3 1 soft key labeled Menu to open the function menu and move the menu selector to the LO ee item Next press the softkey labeled LO to toggle the low pass filter mode MENU SAVE HELP SETUP True RMS Multimeter amp Oscillometer User Manual 5 5 mV Voltage Measurements CAUTION Do not measure mV
30. n CAP gt position 2 Press the soft key labeled Menu Move the menu selector to the menu item labeled Diode Press the soft key Diode 3 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack 5 Forward voltage will typically indicate 0 400 to 3 200V Reverse voltage will indicate OL Shorted devices will indicate near OV and an open device will indicate OL in both polarities True RMS Multimeter amp Oscillometer User Manual 5 11 Capacitance Measurements WARNING To avoid electric shock disconnect power to the unit under test and discharge all Capacitors before taking any capacitance measurements Remove the batteries and unplug the line cords 1 Set the rotary function switch to the green position 2 Press the soft key labeled Menu Move the menu selector to the menu item labeled Cap Press the soft key Cap 3 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 4 Read the capacitance value in the Display True RMS Multimeter amp Oscillometer User Manual 5 12 DC Current Measurements CAUTION Do not make 20A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 5000pA DC
31. nce the MAX MIN mode was activated This mode is for capturing intermittent readings recording minimum and maximum readings unattended or recording readings while equipment operation precludes watching the Meter The MIN MAX mode is best for recording power supply surges inrush currents and finding intermittent failures Response time is the length of time an input must stayat a new value to be captured as a possible new minimumor maximum value To activate the MAX MIN mode press MAX MIN As shown in Figure the Meter displays e at the top of the measurement page and the MAX MIN start date and time along the bottom of the page In addition the recorded maximum average and minimum values appear in the secondary display with their respective elapsed times To stop a MIN MAX recording session press am 13 18 0 0008 voc vd E the softkey labeled Stop The summary i rue information in the display freezes and the 0 0039 softkeys change function to allow saving Wrimm 0 0223 VDG the collected data Pressing the softkey 02ER labeled Close exits the MIN MAX record EEUU NES Restart SAVE CLOSE session without saving the collected data True RMS Multimeter amp Oscillometer User Manual To save the MIN MAX screen data the MIN MAX session must be ended by pressing the softkey labeled Stop Next press the softkey labeled Save A dialog box openswhere the default saved name can be selected or anothername as
32. nd secure it by turning the screw one half turn clockwise _ battery cover Fur 7 AV Li ion Seal ring of battery cover battery cover p 7 4V Li ion battery Back shell Seal ring of Js battery cover Fuse wire Seal ring of back Shell Fuse wire Fuse wire True RMS Multimeter amp Oscillometer User Manual 6 General Specification Double molded waterproof Shock Drop Test 6 5 feet 2 meters Diode Test Test current of 0 9mA maximum open circuit voltage 3 2V DC typical Continuity Check Audible signal will sound if the resistance is less than 25Q approx test current lt 0 35mA PEAK Captures peaks gt 1ms Temperature Sensor Requires type K thermocouple nput Impedance gt 10MQ VDC amp gt 9MQ VAC AC Response True RMS AC True RMS The term stands for Root Mean Square which represents the method of calculation of the voltage or current value Average responding multimeters are calibrated to read correctly only on sine waves and they will read inaccurately on non sine wave or distorted signals True rms meters read accurately on either type of signal ACV Bandwidth 50 7 to 100000Hz 3 at full scale up to 500V decreasing linearly to 1 5 at 1000V is displayed 5 30minutes approximately with disable feature Polarity Automatic no indication for positive Minus sign for negative Measurement Rate 20 times per second Low Battery Indication
33. ng signals by FFT mathematical mode e Analyze harmonic wave in power line Measure harmonic wave content and distortion in system Measure impulse response of filter and system e Analyze oscillation True RMS Multimeter amp Oscillometer User Manual If adopt FFT Fast Fourier Transform mode take following steps 1 Set up time domain waveform 0170172011 00 07 08 FFT e Press AUTO to display proper waveform e f displayed waveform shows unsatisfactory press 4 gt and A V for adjustment Press F4 FFT the oscilloscope may adopt the 256 central points of time domain waveform to calculate FFT frequency spectrum A e According to Nyquist criterion press lt q gt make lt lt lt mmm sampling rate up to at least 2 times of input signal Picture 2 10 1 split screen frequency 2 FFT frequency spectrum display Press F4 FFT button display FFT frequency spectrum in which a channel waveform and FFT waveform are shown in the split screen FFT windows instructions As the oscilloscope takes FFT transform for time records of limited length FFT calculation mode bases on repeated YT waveform In this case if the cycle is integer frequency values of YT waveform are the same at the beginning and the end the waveform may not be interrupted However if the YT waveform cycle is not integer frequency values shows different at the beginning and the end high frequency transient interrupts occ
34. o purple red from green if storage succeeds elf previous store exists system presents Into the new if answer yes original content is covered current content is stored if quit the operation e Press F4 EXIT to quit 2 Store the record state waveform into the device Press REC F2 Save select position F1 Memory rest steps same as 1 Press F4 back to turn back to flip operation interface of record state press REC to quit 3 Store FFT displayed waveform into device Press F4 FFT HOLD F1 Save aw select position F1 Memory rest steps same as 1 2 15 2 Deletion Under Save Operations state press AW select position then press F2 Delete system presents Are you sure if answer yes the content is deleted if no quit the Operation 2 15 3 Callout e Under Save Operations state press AW lt gt select position then press Recall the selected content displays on the screen The waveform data is sent to upper computer by Bluetooth or wireless USB while waveform callout Save Operations 1 No store GEO 500 diu 1000 0 5 Fey Memory Delete Recall Exit V F cursor Save Picture 2 13 1 Picture 2 13 2 True RMS Multimeter amp Oscillometer User Manual Press F2 return under waveform displaying state turn back to Save Operations state e Pres
35. oltage if the voltage on the COM input jack exceeds 1000V above earth ground 3 4 NEVER connect the meter leads across a voltage source while the function switch is in the current resistance or diode mode Doing so can damage the meter 3 5 ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests 3 6 ALWAYS turn off the power and disconnect the test leads before opening the covers to replace the fuse or batteries True RMS Multimeter amp Oscillometer User Manual 3 7 NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 4 Feature 4 1 Understanding the Push Buttons The 12 push buttons on the front of the Meter activate features that augment the function selected using the rotary switch navigate menus or control power to Meter circuits F1F2F3F4 Selects sub functions and modes related to the rotary switch function Cursor buttons select an item in a menu adjust display contrast scroll through information and perform data entry HOLD Freezes the present reading in the display and allows the display to be saved Also accesses AutoHold RANGES witches the Meter range mode to manual and then cycles through all ranges To return to auto ranging press the button for 1 second
36. operation Cursor test Multi screen display for channel waveform and FFT waveform Menu display mode much flexible and natural operation for customer e English online help system user manual Product warranty card Certificate of quality One set of 1 1 probe One adaptor e A charger according with user s country standard CD pc software True RMS Multimeter amp Oscillometer User Manual General safety requirements Know about the following safety precautions to avoid personal injury also to prevent damage generated by connection of this product with any other product In order to avoid any potential danger please use the product according to the regulation Only qualified technical personnel can take the maintenance procedures Prevent fire disaster or personal injury Use proper charger Only special charger for this product confirmed by user s country is available Insert and pull out correctly Don t insert or pull out while test wire is connecting with power cable Connect the probe correctly Probe ground wire is the same as earth potential please don t connect the ground wire to a high voltage During the test procedure please don t touch bare contacts or components Check all the terminal ratings In order to prevent danger of fire and electrical shock please check all the ratings and notes of this product Before connecting the device please read the user manual for furth
37. or As the following picture shows press HOLD or REC V Fcursor appear in prompt bar indicates function switch button for cursor measurement 1 Blue vertical cursor appears on the displayed screen press lt 4 gt to move the cursor one time for one space press this key for more than 1 second for fast move the cursor moves continuously in the same direction 2 Press MODE to switch left right cursor lighter cursor indicates state of activation 3 Display mode of frequency and cycle is also switched at the time of left right cursor switch Activate left cursor displays frequency right cursor for cycle See picture 2 11 1 True RMS Multimeter amp Oscillometer User Manual 4 Press F1 V F cursor cursor measurement turns to voltage amplitude from frequency cycle Up and down cursor appears on the screen at the moment 5 If use needs to move the cursor press AW one time for one space press this key for more than 1 second for fast move the cursor moves continuously in the same direction 6 Press MODE to switch up down cursor lighter one indicates state of activation 01 01 2011 00 08 00 HOLD 01 01 2011 00 08 00 HOLD AT 1000 0 us U F cursor Save Picture 2 11 1 2 13 Cursor Data Measurement Manual cursor measurement increment for horizontal or vertical coordinate figure and increment between two cursors Time cursor time cursor displays as vertical line on the sc
38. or next to the menu item labeled Event Threshold for Recording AutoHOLD and then press the softkey labeled Edit Press A or V to scroll through the event threshold values With the desired value selected press the softkey labeled Close 5 31 Calibration The Calibration selection allows a qualified calibration technician to enter a password that allows the Meter to be calibrated 5 32 Using Communications You can use the Wireless communication link and transfer the contents of a meter s memory to a PC True RMS Multimeter amp Oscillometer User Manual 5 33 Setting Date and Time The Meter s internal clock is used in the display and for timestamping recorded measurements To change the date and time as well as the display format press the softkey labeled Setup Position the menu selector next to the menu item labeled Display To set the date and time press the softkey labeled Date Time to open the date time menu Next position the menu selector next to either the Set Date item or Set Time item and press the softkey labeled Edit Using lt and position the cursor on the date or time element to adjust Use A and V to change the selected date or time element value Press OK to complete the action 5 34 Auto Power Off Press the softkey labeled Setup Position the menu selector next to the menu item labeled Display To set Auto Power Off and then press the softkey labeledEdit Use and V to adjust the time to one of the preset val
39. reen which can measure vertical parameter result appears on the bottom of screen see picture 2 11 2 e Voltage cursor voltage cursor displays as horizontal line on the screen which can measure vertical parameter Picture 2 11 3 result appears on the bottom see picture 2 11 3 2 14 Waveform Records In order to clearly observe some serial signals as UART IIC record mode can be used Press REC the device captures and records signals after the records result displays on the screen by page order Press NEXT turn to next page 10 pages can be continuously turned Press PREVIOUS turn back to the previous page State of movement and measurement of cursor is same as HOLD 2 15 Memory System Digital Oscilloscope memorizes 10 series waveforms to its internal memorizer The memorized date can be stored for 10 years memorizer space can be repeatedly used for one million times The waveform data in it can be recalled back to current oscilloscope or be sent to upper computer by its internal Bluetooth as portable computer or PC then be opened by relevant software in computer Measurement in computer may also be taken True RMS Multimeter amp Oscillometer User Manual 1 Store the current displayed waveform into the device e Press HOLD F2 Save enter into Save Operations state A Y select position F1 Memory when no store exists in the position No store store directly the color may turn t
40. s F4 EXIT in waveform displaying state turn back to waveform displaying state 3 Examples This chapter mainly introduces several application examples these simplified examples focus on some main functions of the oscilloscope and user may take it for reference to solve some actual testing problems Simple measurement e Cursor measurement Analyze detailed information of signal e Analyze communication signal difference by mathematical computing function 3 1 Simple Measurement Observe unknown signal in circuit fast display the frequency and peak value of the measured signal 1 Auto search function In order to fast display the signal take following steps 1 Connect correctly the probe and connector 2 Press AUTO wait a moment the oscilloscope auto searches most of the displayed signals User can take manual adjustment on this basis until the displayed waveform satisfies user s needs Note the oscilloscope displays corresponding auto search result in waveform area on the screen according to detected signal type 3 2 Cursor measurement The oscilloscope can auto measure most displayed signals If needs to accurately measure the frequency and peak value of signal take following steps 1 measure signal frequency Press HOLD freeze the waveform e Press 4 or gt to move left cursor e Press to switch cursor press lt q or p gt to move right cursor Read
41. set the function switch to the yellow pA position and insert the red test lead banana plug into the jack 3 For current measurements up to500mA DC set the function switch to the yellow mA position and insert the red test lead banana plug into the jack 4 For current measurements up to 10A DC set the function switch to the yellow 10A position and insert the red test lead banana plug into the 10A jack 5 Press the MODE button to indicate DC on the display 6 Read the current in the display True RMS Multimeter amp Oscillometer User Manual 5 13 AC Current Measurements CAUTION Do not make 10A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 5000 AC set the function switch to the yellow pA position and insert the red test lead banana plug into the uA mA jack 3 For current measurements up to 500mA AC set the function switch to the yellow mA position and insert the red test lead banana plug into the uA mA jack 4 For current measurements up to 20A AC set the function switch to the yellow 10A position and insert the red test lead banana plug into the 10A jack 5 Press the soft key labeled Menu Move the menu selector to the menu item labeled AC Press the soft key AC 6 Read the current in the display True RMS M
42. signed the softkey labeled Save to store Pressing the softkey labeled Restart while MIN MAX is running stops the MIN MAX session discards all MIN MAXdata and immediately starts a new MIN MAX recording session 5 18 Capturing Peak Values Bu c To activate the peak mode press the softkey labeled Menu Move the menu selector next 0 01 89 to the menu item labeledPeak CF or Peak Clone Van et Press the softkey labeled Peak to startthe Palin 0 0851 VAG 9 peak recording session MENU SAVE HELP SETUP 5 19 Relative Values To activate the peak mode press the softkey labeled Menu Move the menu selector next to the menu item labeled REL or Peak Press the softkey labeled REL to start the peak recording session If the Meter is already in the relative function pressing Rel causes the Meter to turn off relative and display relative percent 5 20 Low Pass Filter m EN VAG a The Meter is equipped with an ac low pass s filter When measuring AC voltage press the 0 0 1 3 1 softkey labeled Menu to open the function menu and move the menu selector to the LO item Next press the softkey labeled LO to toggle the low pass filter mode wen SAVE SETUP 5 21 Hold and AutoHold Mode 13 25 0 0008 m m mADG 4 To freeze the display for any function press N key HOLD 0 000 Pressing the softkey labeled AutoHOLD A E UTE ane activates AutoHold if the Meter is not in the Peak MIN or Record mo
43. st Insulation Test and Continuity plus Thermocouple Temperature It can store and recall data It features a waterproof rugged design for heavy duty use Proper use and care of this meter will provide many years of reliable service 2 Safety This symbol adjacent to another symbol terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter WARNING This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product This symbol advises the user that the terminal s so marked must not be connected to a Circuit point at which the voltage with respect to earth ground exceeds in this case 1000 VAC or VDC This symbol adjacent to one or more terminals identifies them as being associated with AN ranges that may in normal use be subjected to particularly hazardous voltages For maximum safety the meter and its test leads should not be handled when these terminals are energized oy This symbol indicates that a device is protected throughout by double insulation or reinforced insulation PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures
44. trial frequency voltage 2 3 Help Section For the convenience of user built in simple instructions in Digital Oscilloscope is available part one presents the function of various function keys part two indicates quick start use e Press F1 HELP enter into help section e Press F4 quit from help section 2 4 System Settings 1 Digital Oscilloscope can adjust relative trigger mode according to input signal 2 Setup the coupling mode according to input signal 3 Setup the warning tone is activated or not Chart 2 4 1 Function observations Trigger mode Rising edge falling edge no trigger Coupling mode AC coupling DC coupling Warning tone Key tone no key tone Set up by taking the following steps 1 Running state RUN press F2 according to the prompt SET enter into setup interface SYSTEM SETUP 2 Press A V by user s needs to select the function in chart 2 4 1 3 Press lt gt by user s needs to select the observation in chart 2 4 1 4 Press F4 save the settings and quit see picture 2 4 1 Picture2 4 1 True RMS Multimeter amp Oscillometer User Manual 2 5 Fast slow display When the measured signal is unstable displayed waveform presents jumping long term observation may cause eye fatigue Digital Oscilloscope offers the selection of fast slow display function press F3 F S fast display can be switched to slow display which can efficiently improve eye fatigue
45. ues 0 is disable the timeout feature Press the softkey labeled OK to set the selected time Press the softkey labeled Close to return 5 35 Setting Format Press the softkey labeled Setup Position the menu selector next to the menu item labeled Format Using thecursor buttons move the menu selector next to the menuitem labeled Numeric Date Time format press the softkey labeled EDIT select 0 0000 0 0000 and MM DD YY DD MM YY and 24 HOUR 12 HOUR format 5 36 Replacing the Batteries Refer to Figure and replace the batteries as follows 1 Turn the Meter off and remove the test leads from the terminals 2 Remove the battery door assembly by using a standardblade screwdriver to turn the battery door screw one half turn counterclockwise 3 Replace the batteries with 7 4 volt charge batteries Observe proper polarity 4 Reinstall the battery door assembly and secure it by turning the screw one half turn clockwise True RMS Multimeter amp Oscillometer User Manual 5 37 Replacing the Fuses Referring to Figure examine or replace the Meter s fuses as follows 1 Turn the Meter off and remove the test leads from the terminals 2 Remove the battery door assembly by using a standardblade screwdriver to turn the battery door screw one half turn counterclockwise 3 Remove the fuse by gently prying one end loose then sliding the fuse out of its bracket 4 Install only specified replacement fuses 5 Reinstall the battery door assembly a
46. ultimeter amp Oscillometer User Manual 5 14 Understanding Function Menus Each primary measurement function rotary switch position has a number of optional sub functions or modes accessed by pressing the softkey labeled Menu F1 A typical menu is shown in Figure Menu selection is indicated by the filled in 8 i315 DE T black square hereafter the menu selector Auto Range to the left of a menu item Use the four front panel cursor buttons lt P to 0 0009 position the menu selector next to a menu item As the menu selector moves between MENU i DC AC AC DC menu items the four softkeys and their labels o nzr m O HZ ms change to reflect the available functions O PEAK CF OdBma a and or modes available for the selection VAC HELP CLOSE menu item 5 15 Using Help While operating the Meter more information about a selected function a front panel button or a menu item may be necessary Press soft key HELP to open an information window that lists topics covering the functions and modifiers that are available at the time the button is pressed Each topic provides a brief explanation on a Meter function or feature The number of information topics displayed at any one time may exceed the display area Use the softkeys labeled Next and Prev to move from topic to topic Use the softkey labeled More or A and to scroll through the information a full screen at a time True
47. ur at connecting part That is so called leakage in frequency domain Therefore in order to avoid leakage multiply a window function with the original waveform forcing the values at the beginning and the end to 0 00 07 08 FFT Picture2 10 2 3 Position FFT frequency spectrum lt q gt button can still be pressed under FFT interface to change sampling rate to realize horizontal amplification or minification e Adjust A Y to realize vertical amplification or minification 4 Measure FFT frequency spectrum by cursor Two kinds of measurement can be taken for FFT spectrum by using cursor amplitude relative value and frequency unit Hz e Under FFT interface press F2 lt lt lt or F3 gt gt according to prompt bar to move red cursor corresponding frequency and relative amplitude can be measured True RMS Multimeter amp Oscillometer User Manual Note DC component or deviation existed in signal may cause error or deviation in FFT waveform component part Select DC coupling mode to reduce AC component Nyquist frequency for waveform of which highest value ups to F sampling rate of 2F must be adopted to rebuild the waveform that is also called Nyquist criteria means Nyquist frequency 2F means Nyquist rate 2 11 Signal Capture System Real time sampling the memory space should be full for every sampling Real time sampling rate ups to 50MSa s The system is under de
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