Omega HOS-MS420 User Manual
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Omega HOS-MS420 User Manual

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  • Page 1 Shop online at omega.com ® e-mail: info@omega.com or latest product manuals: omegamanual.info MADE IN CHINA...
  • Page 2 OMEGAnet Online Service Internet e-mail ® omega.com info@omega.com U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047 Stamford, CT 06907-0047 USA ISO 9001 ertified Toll Free: 1-800-826-6342 TEL: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Bergar Laval (Quebec), H7L 5A1 Canada...
  • Page 3 INTRODUCTION Congratulations on your purchase of the Extech Digital Oscilloscope. This manual is divided into two sections: Section One for the Oscilloscope functions and Section Two for the MultiMeter functions. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.
  • Page 4 TABLE OF CONTENTS GENERAL INFORMATION ARRANTY RODUCT ONTENTS AFETY NFORMATION NPUT ONNECTIONS RONT ANEL AND ONTROL VERVIEW ECALL ACTORY EFAULT ETTINGS PC D RANSMISSION FAQ. A: S PPENDIX PECIFICATIONS B: M PPENDIX AINTENANCE AND LEANING C: B PPENDIX ATTERY CHARGING AND REPLACEMENT D: S PPENDIX ETTING THE...
  • Page 5 ISPLAY ETTINGS TORING AVEFORMS IN THE METER UNCTION ETTINGS ALIBRATION ANGE EASUREMENTS UTOSCALE URSOR EASUREMENTS (MS460) REQUENCY OUNTER QUARE WAVE OUTPUT FFT M .(MS420) YSTEM TATUS SECTION TWO – MULTIMETER FUNCTIONS ONNECTING THE METER ISPLAY INDOW ESISTANCE EASUREMENTS EASURING IODE OLTAGE ONTINUITY EASURING...
  • Page 6 RODUCT ONTENTS (R EFER TO THE BELOW 1. MS420 / MS460 Instrument 2. AC Adaptor 3. Oscilloscope Probes (2); Grey in color 4. Multimeter test leads (2); One black, one red 5. USB mass storage connection cable 6. Extension module for low capacitance measurements 7.

  • Page 7: Safety Information

      AFETY NFORMATION Please read the user manual before use to ensure safety and precision   AFETY  YMBOLS AND  ERMS  AFETY YMBOLS HESE SYMBOLS MAY APPEAR IN THIS MANUAL OR ON THE INSTRUMENT : “W ” & ARNING ARNING IDENTIFIES CONDITIONS ACTIONS THAT POSE A HAZARD TO THE USER Caution:...

  • Page 8: General Safety Information

        ENERAL  AFETY  NFORMATION Carefully read the following safety information in order to avoid personal injury and damage to this product or to products connected to it. This product must only be used in the specified manner to prevent danger and hazard to products and persons. Warning: To avoid fire or electrical shock please use the proper power adapter.
  • Page 9   applications and as V dc for DC applications. Overvoltage Category II refers to local level applicable for appliances and portable equipment. Only qualified technical personnel should perform maintenance on these devices. Observe the nominal value limits for all terminals: To avoid fire or electric shock, observe all nominal value limits, markings, and specifications for this product.

  • Page 10: Input Connections

      NPUT ONNECTIONS   NPUT  ONNECTIONS See Figure 2 below 6  Figure 2 Description 1. The power adapter is use to supply AC power and for battery recharging 2. Multimeter test leads 3. Multimeter input jacks (L to R: Current 2A-10A input, mA Current input, COM ground input, Voltage/Resistance/Capacitance input) 4.

  • Page 11: Keypad Overview

        RONT  ANEL AND  EYPAD  VERVIEW Figure 3 10  V5.1 ‐ March 2010   ...
  • Page 12   Description of Meter Front Panel and Keypad (Figure 3) AC adapter Port RS-232C Port USB Port USB Mass Storage Port Power switch F1 – F5 Soft-key options 7. AUTO SET: In the Scope mode, the meter automatically selects the horizontal/vertical scale and trigger level 8.

  • Page 13: About This Chapter

      ASIC SCILLOSCOPE UNCTIONS   BOUT THIS  HAPTER This chapter provides introductory Oscilloscope instructions. This introduction does not cover all of the oscilloscope capabilities but provides basic examples of menu navigation and operations. Detailed instructions are provided in the Advanced Oscilloscope functions section.  ...
  • Page 14   Description of Oscilloscope Display Screen (Figure 4) Battery power status icon ( , , Auto measurement screen No. 1 (“f” for frequency, “T” for cycle, “V” for average value, “Vp” is the peak-peak value and “Vk” is the root-mean- square value Auto measurement screen No.
  • Page 15   13. The coupling mode for CH2; “~” AC, “-” DC, and ground 14. The vertical Voltage units scale for CH2 15. The coupling mode for CH1; “~” AC, “-” DC, and ground 16. Vertical Unit Scale for CH1 17. The blue pointer shows the ground point of the waveform for CH2 (zero position).

  • Page 16: Menu Description

        ENU  ESCRIPTION The following explains how to navigate the menus to select a function. Press the MENU key to open the Function Menu. The Menu appears on the right of the screen with the corresponding options available on the bottom of the screen.
  • Page 17   Figure 6 2. Press ◄ (yellow) or ► (yellow) to adjust the main time base. Press ▲ (yellow) or▼ (yellow) to adjust the trigger horizontal position. Press OPTION again and the following will appear: ◄/► – Time ▲/▼– Trig See Figure 7: Figure 7 4.
  • Page 18   When triggering in the Alternate trigger mode: 7. Press OPTION and the following will appear: —Time —Trig 2 See Figure 8: Figure 8: Press ◄ (yellow) or ► (yellow) to adjust the time base horizontal position and press ▲ (yellow) or ▼ (yellow) to adjust the trigger horizontal position for Channel 2. Press OPTION again to display the following: —...
  • Page 19   Figure 9: Press ◄ (yellow) or ► (yellow) to adjust the main time base and press ▲ (yellow) or▼ (yellow) to adjust the trigger horizontal position for Channel 1. Press OPTION again to return to step 6 above. Glossary of Terms Vertical scale factor: The voltage amplitude represented by a division in the vertical direction of the display area, through the adjustment of which the user can amplify or attenuate the signal and thus regulate the signal amplitude so that it is...
  • Page 20     ECALL THE  ACTORY  EFAULT  ETTINGS To reset the Oscilloscope to the factory default settings, refer to the following: 1. Press the MENU key; the function menu will appear on the right side of the screen 2. Press the MENU ▲ or MENU ▼ key to select a FUNCTION; three options will be visible at the bottom of the screen.
  • Page 21   ‐S   EASURE  NKNOWN  IGNALS USING THE  ET  EATURE The Auto-Set feature allows the Oscilloscope to measure and display unknown signals automatically. This function optimizes position, range, time-base, and triggering. It also assures a stable display of virtually any waveform. Auto Range is especially useful for quickly checking several signals.
  • Page 22   Refer to Figure 11: Figure 11: Automatic Scope Measurements )  ATA  OLD  REEZING THE  ISPLAYED  EADING To freeze any displayed reading or waveform, follow these steps: Press the RUN/STOP key to freeze the screen: STOP appears at the top (right) of the screen.
  • Page 23     SING THE  VERAGE  ODE TO  MOOTH  AVEFORMS Use the Average mode to smooth the displayed waveform; multiple data samples will be averaged. The number of samples to average is selectable from 4, 16, 64, up to 128. Note: For best results, the waveform must be repetitive. As the number of average samples increases the waveform updating time increases.
  • Page 24   Press the MENU key; the function menu will appear on the right side of the screen. Press MENU ▲ or MENU ▼ to select DISP SET. Four (4) selectable options will appear at the bottom of the screen. 23  V5.1 ‐ March 2010 ...
  • Page 25   Press the F2 key to select 1 sec, 2 sec, 5 sec, infinite or OFF. Select a 1, 2, or 5 second waveform display duration as desired. When Infinite is selected the waveform will remain on the screen indefinitely. When OFF is selected, the Persistence function has no effect on displayed waveforms.
  • Page 26   Figure 15: Peak Detection Glossary of Terms • Collecting mode: The oscilloscope converts the collected analog data into digital data for each of the following three modes: Sampling, Peak Detect, and Averaging. • Sampling: The waveform sampling resolution in seconds. Waveforms that change faster than the sample duration will not be accurately captured.
  • Page 27   After a reset, the Oscilloscope is dc-coupled so that ac and dc voltages appear on the screen. Use ac-coupling to observe a small ac signal that rides on a dc signal. To select ac-coupling, perform the following steps: Press the MENU key; the function menu will appear at the right side of the screen.
  • Page 28   Figure 17: Inverted Waveform   SING  ATHEMATICAL  UNCTIONS ON  AVEFORMS  When adding (CH1 + CH2), subtracting (CH1 – CH2, CH2 – CH1), multiplying (CH1 * CH2) or dividing (CH1/CH2) the input waveforms of CH1 and CH2, the oscilloscope will display the mathematical result waveform M and the input waveforms of CH1 and CH2 on the screen.
  • Page 29   (yellow) (yellow) 5. Press▲ or ▼ to adjust the vertical display position of waveform M. (yellow) o (yellow) Press ◄ r ► to adjust the display time factor for waveform M. Refer to Figure 18. Figure 18: Waveform Mathematical Calculations  ...
  • Page 30 DVANCED SCILLOSCOPE UNCTIONS   BOUT THIS  HAPTER Advanced Oscilloscope functions are covered in this chapter. CH2  ERTICAL  ETTINGS FOR   AND  Each channel has its own independent vertical menu and each item can be set respectively based on the specific channel. To make vertical CH1 and CH2 settings, perform the following steps: Press the MENU key;...

  • Page 31: Setting The Channel Coupling

      The following Table describes the Vertical Channel menu: Function Description Setting menu The dc component in the input signal is blocked Coupling The ac and dc components of the input signal are available Close the channel Channel Open the channel Select the desired probe attenuation Probe 100X...
  • Page 32   Figure 20: AC Coupling 31  V5.1 ‐ March 2010   ...
  • Page 33   Figure 21: DC Coupling PEN AND LOSE EASUREMENT HANNELS CH1 will be used in this example. Press the F2 Channel key and then OFF to Close CH1. Press the F2 Channel key and then ON to Open CH1. ETTING THE PROBE ATTENUATION To prevent excessive input voltage, set the probe attenuation level to the 10X position.
  • Page 34   NVERT A AVEFORM Inverted waveform: The displayed signal reverses 180 degrees relative to ground. Press F4 Invert to invert the waveform; press F4 Invert again to exit the inversion mode. 33  V5.1 ‐ March 2010   ...
  • Page 35   WAVE MATH       UNCTION  ENU  ETTINGS The WAVE MATH functions show the calculation results (adding, subtracting, multiplying or dividing CH1 and CH2 channel waveforms). Arithmetic operation results can be displayed using a grid or a cursor. The amplitude of the calculated waveform can be adjusted with CHM VOL, which is displayed in the scale factor form.

  • Page 36: Trigger System

      Figure 22: Waveform Mathematics   ETTING THE  RIGGER  YSTEM The trigger determines when the acquisition and display of waveform data occurs. When starting to acquire data, the oscilloscope collects sufficient information to draw the waveform at the left side of the triggering point. While waiting for a triggering condition, the oscilloscope gathers data continuously.

  • Page 37: Triggering Control

        RIGGERING  ONTROL There are three triggering modes: Edge triggering, Video triggering, and Alternating triggering. Each trigger mode has its own function menu. Edge triggering: The edge trigger triggers on the incoming signal edge. Use the edge trigger for all signals except for video. Video triggering: Perform video field trigger or line trigger on standard video signals.
  • Page 38   The Edge triggering menu is described in the following table Function Settings Description  menu Slope Rising Triggering on the rising edge of the signal Falling Triggering on the falling edge of the signal. Source CH1 is used as the trigger source CH2 is used as the trigger source Trig mode Auto...
  • Page 39   Figure 24a (screen 1) and 24b (screen 2): Odd Field Video Trigger Fig. 25: Video Line trigger (screen 1) Fig. 26: Video Line Trigger (screen 2) The Video triggering menu is described in the following table. Function Settings Description menu First screen Normal...
  • Page 40   Odd field Set synchronous trigger in video odd line Even field Set synchronous trigger in video even line Line NUM Set synchronous trigger in video Line NUM Move to next menu When the sync is Line, Field, Odd Field, Even Field, the second page is as follows: NTSC National Television System Committee standard...

  • Page 41: Alternate Trigger

      LTERNATE TRIGGER In Alternate trigger mode, the trigger signal is taken from two vertical channels. Alternate trigger mode can be used to observe two signals of differing frequencies. From this menu the user can set a different trigger type for two separate vertical channels. Refer to Figure 27a.
  • Page 42   Coupling The DC component is blocked All components are allowed to pass The HF part of the signal is blocked and only the HF Rjc LF component is allowed The LF part of the signal is blocked and only the LF Rjc HF component is allowed SENS...
  • Page 43   Line NUM Set synchronous trigger in video Line NUM When the sync is Line, Field, Odd Field, Even Field, the menu is as follows: MODU NTSC Common video standard (used in the U.S.) (Modulation) PAL/SECAM Least common standard (common in Europe) Hold-off Move to the Hold-off menu...
  • Page 44   When the ‘Hold-off’ menu is accessed the screen will appear as below:    Figure 27b: ‘Hold-off’ menu screen (MS420) Refer to the Table below for details on the ‘Hold-off’ mode: (MS420 only) Description  Function menu Settings OFF Time Select a time duration (hold-off time) that will act as a delay before each trigger event Time...

  • Page 45: Glossary Of Terms

      Glossary of Terms • Hold-off time: Programmable time period between trigger events (100ns default). • Trigger modes: There are three trigger modes: Auto (acquires signal continuously), Normal (acquires signal when trigger conditions are met) and Single (manually triggers the signal). •...

  • Page 46: Display Setting

        CQUISITION  The Acquiring Mode menu is described in the Table shown below. Function menu Settings Description Sample The waveform data sampling time interval. The sample mode accurately reconstructs the waveform, but cannot respond to rapid changes and sudden peaks.
  • Page 47   vertical axis Carry Bitmap Data transmitted in bitmap format (dots) Vectors Data transmitted in vector format (line) ISPLAY TYLE The display style includes Vector and Dot display types, as shown in Figure 28 and 29. 46  V5.1 ‐ March 2010   ...
  • Page 48   Figure 28: Dot Style Figure 29: Vector Style ERSISTENCE The user can select the duration of time that past traces remain on the display. The selections are 1, 2, 5 seconds, Infinite, and OFF. XY M This mode is only applicable to simultaneous CH1 and CH2 measurements. The X-Y format plots the CH1 input as X-axis and CH2 input as Y-axis.
  • Page 49   convenient for viewing the phase relationship between CH1 and CH2; if the oscilloscope does not detect triggering the data appear in light spots. 48  V5.1 ‐ March 2010   ...
  • Page 50   Description of Control Keys: ■ The CH1 VOL and CH1 ZERO keys for CH1 are used to set the horizontal scale and position. The CH2 VOL and CH2 ZERO keys for CH2 are used to set the vertical scale ■...
  • Page 51   Use the MENU ▲ or MENU ▼ key to select Wave Save. Four (4) selectable options will then appear at the bottom of the screen. Press the F1 key to select CH1 as the signal source. Press the F2 key to select Address A. Press the F3 key to save the waveform on CH1 in address A.
  • Page 52   Refer to Figure 30: Figure 30: Save and Recall Waveforms )  UNCTION  ETTING  ENU  REFER TO  ABLE BELOW Press the MENU button and use the up/down arrow keys to scroll to FUNCTION Function menu Description Recall Factory Set the meter’s settings to their factory default conditions Auto Calibration Perform an Auto-calibration procedure...
  • Page 53   and probes from the oscilloscope 3. After removing all cables, press F2 (Auto calibration) again. The Auto-calibration automatically starts and a status message appears. To interrupt calibration, press any key during the calibration. 52  V5.1 ‐ March 2010   ...
  • Page 54     UTOMATIC  ANGING  EASUREMENTS  The oscilloscope can perform twenty (20) automatic measurements: Frequency, cycle, average, peak-to-peak, root mean square, Vmax, Vmin, Vtop, Vbase, Vamp, overshoot, pre-shoot, rise time, fall time, +width, -width, +duty, -duty, delayA B and delayA B . Two measurement results can be displayed simultaneously on the screen.
  • Page 55   Measure the Overshoot of CH1 Overshoot Measure the Overshoot of CH2 Measure the Preshoot of CH1 Preshoot Measure the Preshoot of CH2 Measure the RiseTime of CH1 RiseTime Measure the RiseTime of CH2 Measure the Fall Time of CH1 Fall Time Measure the Fall Time of CH2 Measure the +Width of CH1...
  • Page 56   options will then appear at the bottom of the screen Press the F1 key to select the frequency measurement of CH1. The measurement window will appear red in color and show the frequency of CH1 Press the MENU ▲ or MENU ▼ key to select MEAS SET 2. Five (5) selectable options will then appear at the bottom of the screen Press the F4 key to select the peak-to-peak value of CH2.
  • Page 57   changing horizontal setting Horizontal Adjust horizontal scale without changing vertical setting HORI—VERT Adjust the vertical and horizontal settings Display one or two periods Display multi-period waveforms To measure CH1 voltage: 1. Press MENU, the function menu will appear on the right side of the screen.
  • Page 58   Fig 32: Autoscale Horizontal - Vertical multi-period waveforms Fig 33: Autoscale Horizontal - Vertical mono-period waveform 57  V5.1 ‐ March 2010   ...
  • Page 59   Fig 34: Vertical mode multi-period waveform Fig 35: Horizontal mode multi-period waveform 58  V5.1 ‐ March 2010   ...
  • Page 60   Notes: 1. In Autoscale mode the meter can automatically set the Trigger mode (Edge, Video, and Alternate) and Type (Edge, Video) 2. In Autoscale mode the meter switches to YT Mode (Auto) from XY mode (STOP) 3. In Autoscale, the meter defaults to DC coupling and AUTO triggering mode 4.

  • Page 61: Cursor Measurements

        URSOR  EASUREMENTS Two cursors can be used to make instantaneous Time and Voltage measurements for CH1 and CH2 signals. Refer to the following table for more information. Function menu Settings Description Type Exit the cursor measurement mode Voltage Display voltage measurement cursor and menu Time Display time measurement cursor and menu...
  • Page 62   Figure 36-a: Use the Cursor for a Voltage Measurement When the MENU button is pressed, the data table appears as shown in Figure 36-b: Figure 36-b: Data Table To use the cursor for a Time measurement on CH1, perform the following steps: Press the MENU key;...
  • Page 63   Press OPTION and the display will show: —Cursor 2 —Cursor 1 Press ▲ (yellow) or ▼ (yellow) to move T1 left and right; the value of T1 (relative to the middle of the screen) will display. Press ◄(yellow) or ►(yellow) to move T2 left and right;...
  • Page 64   MS460   IX    IGIT  REQUENCY  OUNTER  YMOMETER    ONLY The frequency counter measurement range is 2Hz~60MHz. When the meter is configured for edge triggering, it can only measure one channel (the channel that is triggering). When the triggering mode is set to Alternating trigger the instrument can measure both channels (CH1 and CH2).
  • Page 65   (5V, )  QUARE WAVE OUTPUT TEST SIGNAL      The 5V Square Output is available on the jack at the left side of the meter. The 5V digital output has a frequency of 1 KHz and can be used to adjust the probe, as shown as Fig.39 Fig 39: Square-wave test signal Fig 40: 5V square wave output adaptor  ...
  • Page 66   (MS420 )  SING    AST  OURIER  RANSFORM    ONLY FFT breaks down signals into component frequencies, which the oscilloscope uses to display a graph of the frequency domain of a signal (as opposed to the oscilloscope’s standard time domain graph). These frequencies can then be matched with known system frequencies, such as system clocks, oscillators, or power supplies.
  • Page 67   Set multiple *1 Set multiple *2 Zoom Set multiple *5 Set multiple *10 The steps below instruct on the operation of the FFT feature: Press the MENU key; the function menu will appear on the right side of the screen.
  • Page 68   One of the following two prompts will display at the bottom-left of the screen when the Format is set to Vrms. — CH1 voltage level — FFT vertical position Press the blue button VOLTS POSITION; the following will appear: —...
  • Page 69   of CH1 ("CH1 2v~ " appears at bottom side of the screen); If the display at the bottom left side of the screen is " —FFT vertical position", use the red buttons VOLTS POSITION▲ and ▼ to adjust the position of the waveform along the vertical position.
  • Page 70   Figure 41 Selecting an FFT Window ■ The FFT feature provides four (4) windows. Each is a trade-off between frequency resolution and magnitude accuracy. What is measured and what the source signal characteristics are help determine which window to use. Use the following guidelines to select the best window.
  • Page 71   This is a good window for resolving frequencies that are very close to the same value with somewhat improved amplitude accuracy over the rectangle window. It has a slightly better frequency resolution than the Hanning selection. Hamming Use Hamming for measuring sine, periodic, and narrow band random noise.
  • Page 72   Fig 42 - Rectangle window Fig 43 - Blackman window Fig.44 - Hanning window 71  V5.1 ‐ March 2010   ...
  • Page 73   Fig.45 - Hamming window Quick Tips If desired, use the zoom feature to magnify the FFT waveform. Use the default dBV RMS scale to see a detailed view of multiple frequencies, even if their amplitudes vary greatly. Use the linear RMS scale to see an overall view of how frequencies compare.
  • Page 74   3) XY Formatting in the DISPLAY SET mode 4) “SET 50%” (trigger level at the vertical point of the signal amplitude) in the Trigger setting mode 5) Autoscale 6) Wave recording 7) Measure 1 and Measure 2 73  V5.1 ‐ March 2010   ...

  • Page 75: System Status Menu

        YSTEM  TATUS  ENU  The system status menu is used to display configuration information concerning horizontal, vertical, trigger, and other systems. Follow the steps below to check status: Press the MENU key; the function menu will then appear at the right side of the screen.
  • Page 76     AIN  IME  ASE  ODE  The time base mode menu is explained as the following table. Function menu Setting Explanation Main Time Base Horizontal main time base Zone Window Use the two cursors to define a zoom window area Window Full-screen display To zoom in on a small area of the display, perform the following steps:...
  • Page 77   Figure 48: Window Zoom     ATA  RANSMISSION For PC data transmission, perform the following steps: Press MENU; the function menu will then appear on the right side of the screen Press MENU ▲ or MENU ▼ to select the display setting mode DISP SET; the display will show four (4) selectable options at the bottom of the screen Press the F4 key;...
  • Page 78   User's Guide    Model MS460 ­ 60 MHz Digital Oscilloscope  Model MS420 ­ 20 MHz Digital Oscilloscope    SECTION TWO: Multimeter Operation  77  V5.1 ‐ March 2010   ...
  • Page 79   78  V5.1 ‐ March 2010   ...

  • Page 80: Using The Multimeter

      SING THE ULTIMETER   BOUT THIS  HAPTER This chapter provides step-by-step instructions for using the Multimeter functions. These instructions also provide basic examples of menus and other basic operations.   AKING  ETER  ONNECTIONS COM, V/Ω/C, Use the four 4-mm safety banana jack inputs for the Meter functions: 10A, mA The four (4) banana jack inputs on the face of the meter are, L to R, 10A current, mA current, COM (ground/negative), and Volts/Resistance/Capacitance...
  • Page 81   Description Battery status indicator Manual range indicator. In MANUAL mode the user selects the measurement range Measurement mode indicators: DCV: DC Voltage measurement ACV: AC voltage measurement DCA: Direct current (DC) measurement ACA: AC current measurement R: Resistance measurement : Diode measurement : Continuity measurement C: Capacitance measurement...

  • Page 82: Making Multimeter Measurements

        AKING  ULTIMETER  EASUREMENTS Press the DMM/OSC key; the oscilloscope will switch to the multimeter mode. The meter will prompt the user to correctly insert the test leads. Use the A, V, and R keys to select the desired multimeter function. EASURING ESISTANCE To measure resistance, first remove power from the component or circuit under test...
  • Page 83   Reverse the test lead polarity and perform the test again Refer to the example display screen in Figure 3. 82  V5.1 ‐ March 2010   ...
  • Page 84   Figure 3: Diode Measurement ONTINUITY To perform a resistance continuity test, refer to the following: Insert the black lead into the COM banana jack input and the red lead into the V/Ω/C banana jack input Press the R key. An ‘R’ appears at the top of the screen Press the SET key repeatedly until the following is shown on the screen: Connect the red and black leads to the test points.
  • Page 85   Figure 4: Continuity Test 84  V5.1 ‐ March 2010   ...

  • Page 86: Measuring Capacitance

      EASURING APACITANCE To measure Capacitance, refer to the following: Insert the black lead into the COM jack, and the red lead into the V/Ω/C jack Press the R key. An ‘R’ appears at the top of the screen Press the SET key until the C appears at the top of the screen Connect the black and red leads to the capacitor or circuit under test;...
  • Page 87   Figure 6: DC Voltage Measurement AC V EASURING OLTAGE To measure AC voltage, refer to the following: Insert the black lead into the COM banana jack input and the red lead into the V/Ω/C banana jack input. Press the V key and then press SET so that the ACV symbol appears at the top of the screen Connect the red and black leads to the measured points and the AC voltage values of measured points will be displayed on the screen.

  • Page 88: Measuring Dc Current

      DC C EASURING URRENT To measure a DC current lower than 400 mA, do the following: Insert the black lead into the COM banana jack input and the red lead into the mA banana jack input Use the A key and the SET key as needed to select the DCA mode (the DCA symbol will appear at the top of the screen Ensure that the displayed unit of measure on the main reading screen is mA.
  • Page 89   88  V5.1 ‐ March 2010   ...

  • Page 90: Measuring Ac Current

      Figure 9: 10A DC Current Measurement AC C EASURING URRENT To measure AC current lower than 400 mA, perform the following: Insert the black lead into the COM banana jack input and the red lead into the mA banana jack input Press the A key and then the use the SET key to select the ACA mode.
  • Page 91   Figure 10: 400mA AC Current Measurement 90  V5.1 ‐ March 2010   ...
  • Page 92   To measure AC current larger than 400 mA, perform the following: Press the A key and use the SET key to select the ACA mode (ACA symbol will appear at the top of the screen when selected) Press the F5 soft-key to select the 10A measurement mode, the unit of measure on the main reading screen should be A Connect the red and black test leads to the measured points on the circuit under test;...

  • Page 93: Taking A Relative Measurement

      Figure 12: Freezing the Readings AKING A ELATIVE EASUREMENT The meter can display a reading ‘relative’ to a user-selectable reference value. Refer to the following discussion on how to make a relative measurement. First program a reference value. To do so, take a measurement and when the desired reading is displayed press the “||/ ”...
  • Page 94   ELECTING THE UTOMATIC ANUAL ANGE ODES The default mode of the instrument is the automatic range. To switch to the manual range, perform the following steps: Repeatedly press the F1 MANUAL soft-key until the desired range is selected on the meter’s display.
  • Page 95   94  V5.1 ‐ March 2010   ...
  • Page 96   The oscilloscope does not power up Check that the battery is charged. If the battery is not charged, plug the AC Adaptor charger into an AC source and then into the meter. Charge the battery for at least 15 minutes before using the Oscilloscope.
  • Page 97   When using average sampling in the sampling mode or when selecting a long display time in the oscilloscope display mode, the display speed is slow; this is normal 96  V5.1 ‐ March 2010   ...
  • Page 98   PPENDICES   PPENDIX    PECIFICATIONS OSCILLOSCOPE Unless otherwise indicated, all technical specifications are applicable to the 10X probe attenuation switch setting. The oscilloscope should meet the following requirements in order to meet the published specifications. ■ The instrument should be allowed to run continuously for more than 30 minutes under the specified operating temperature ■...
  • Page 99   ( T) measurement Average 16 : ± (1 sampling interval time +100ppm×reading+0.4ns) accuracy（full bandwidth） 98  V4.0 ‐ March 2010 ...
  • Page 100   Vertical Analog digital converter A/D 8 bits resolution (both channels synchronously) Sensitivity range V/div 5mV/div 5V/div(for the BNC connector input ±2V(5mV/div ~ 200mV/div),  Displacement range ± 10 div (MS420), ±50V(500mV/div ~5 V /div) (MS460) Analog bandwidth 60MHz (MS460); 20MHz (MS420) Single bandwidth Full bandwidth Low frequency response ≥...
  • Page 101   Trigger sensitivity (Video 2 divisions of peak-to-peak value triggering and typical mode) Signal system and line/field Supports NTSC, PAL and SECAM broadcasting frequency (Video triggering systems of any field or line frequency mode) Measurement Cursor measurements Voltage difference and time difference between cursors Auto measurements Peak-to-Peak voltage, mean voltage, root mean square value, frequency and period...
  • Page 102   Probe 1X position 10X position Bandwidth Up to 6 MHz (DC) Up to full bandwidth (DC) Attenuation rate 1: 1 10: 1 Compensation range 20pf 40pf Input resistance 1MΩ ±2 10MΩ ±2 Input impedance 85pf 115pf 14.5pf 17.5pf Input voltage 150 V DC 300 V DC MULTIMETER...
  • Page 103   Range Accuracy Resolution 40.00mA ±1.5% ±1 digit 10uA 400.0mA ±1.5% ±1 digit 100uA ±3% ±3 10mA digit 102  V4.0 ‐ March 2010 ...
  • Page 104   Alternating Current (AC) Range Accuracy Resolution 40.00mA ±1.5% ±3 digit 10uA 400.0mA ±2% ±1 digit 100uA ±5% ±3digit 10mA Resistance Range Accuracy Resolution 400.0 Ω ±1% ±3 digit 0.1Ω 4.000KΩ ±1% ±1 digit 1Ω 40.00KΩ 10Ω 400.0KΩ 100Ω 4.000MΩ 1KΩ...

  • Page 105: Specifications

      ENERAL PECIFICATIONS Dimensions 7.1 x 4.5 x 1.6” (18 × 11.5 × 4cm) Weight 1.4 lbs. (645 g) Power consumption Display type 3.7" color liquid crystal display (LCD) Display resolution 640 (horizontal) × 480 (vertical) pixels Display color 65536 colors Power Adapter Power supply 100-240 V AC 50/60Hz...

  • Page 106: Appendix B: Maintenance And Cleaning

        PPENDIX    AINTENANCE AND  LEANING AINTENANCE Do not store or place this instrument where the liquid crystal display (LCD) may be directly exposed to sunlight for extended periods Warning: Do not allow the instrument to become wet Cleaning Inspect the instrument and the probe frequently in accordance with operating conditions.

  • Page 107: Replacing The Lithium Battery Unit

        PPENDIX    HARGING THE  NSTRUMENT The lithium battery may ship un-charged. The battery must be initially charged for 4 hours (the instrument must be turned off during charging). The battery can supply power for 4 hours after being charged completely. When supplying power by using the battery, a battery indicator is displayed on the top of the screen.
  • Page 108   ‐   PPENDIX    ET THE  TIME CLOCK 1. Press the MENU key; the function menu will display on the right side of the screen. 2. Use the MENU ▲ or MENU ▼ key to select SYS STAT; four (4) options will appear at the bottom of the screen.
  • Page 110 Shop online at omega.com Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers & Process Monitors Infrared Pyrometers Transducers & Strain Gages Load Cells & Pressure Gages Displacement Transducers Instrumentation &...

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