Owon HDS25 (S) User Manual

Handheld oscilloscope

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HDS20 Dual Channel Series

Handheld Oscilloscope User Manual

 HDS25（S）

For product support, visit:www.owon.com.hk/download

※：The illustrations, interface, icons and characters in the user manual may be slightly

different from the actual product. Please refer to the actual product.

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Page 1 HDS20 Dual Channel Series Handheld Oscilloscope User Manual  HDS25（S） For product support, visit:www.owon.com.hk/download ※：The illustrations, interface, icons and characters in the user manual may be slightly different from the actual product. Please refer to the actual product.
Page 2 LILLIPUT Company. Fujian LILLIPUT Optoelectronics Technology Co., Ltd. No. 19, Heming Road Lantian Industrial Zone, Zhangzhou 363005 P.R. China Tel: +86-596-2130430 Fax: +86-596-2109272 Web: www.owon.com.cn E-mail: info@owon.com.cn...
Page 3 General Warranty We warrant that the product will be free from defects in materials and workmanship for a period of 3 years from the date of purchase of the product by the original purchaser from the our Company. The warranty period for accessories such as probes, adapter is 12 months.
Page 4 Table of Contents 1. Safety Information ..................1 Safety Terms and Symbols ........................ 1 Safety Requirements ........................... 1 2. How to Implement the General Inspection ..........5 3. How to Use the Oscilloscope ..............6 The Structure of the Oscilloscope ....................6 Front Panel and Keys ........................6 Side Panel ............................8 Introduction to the User Interface of the Oscilloscope ..............
Page 5 9. Appendix ....................38 Appendix A: List of Accessories ....................38 Appendix B: Maintenance and Cleaning ..................38 General maintenance ........................38 Charging and Replacement of Battery ..................39 Replacement of Lithium Battery ..................... 40...
Page 6 1. Safety Information (Before using this product, please read the safety information in advance) Safety Terms and Symbols Terms in this manual The following terms may appear in this manual: Warning: Warning indicates conditions or practices that could result in injury or loss of life. Caution: Caution indicates the conditions or practices that could result in damage to this product or other property.
Page 7 to avoid possible hazards, this product can only be used within the specified range.  Only a qualified person should perform internal maintenance.  Check all Terminal Ratings. To avoid fire or shock hazard, check all ratings and markings on this product. Refer to the user manual for more information about ratings before connecting to the instrument.
Page 8 Schematic diagram of internal ground connection when oscilloscope is connected with computer through the port: When the oscilloscope is AC powered by adapter or connected with AC powered computer through the port, it is not allowed to measure the primary power supply of power grid.
Page 9 Pay special attention when using 1:1 test wires, because the probe voltage will be directly transmitted to the oscilloscope.  Do not touch the bare metal BNC or banana plug.  Do not insert metal objects into the connector.  Use the oscilloscope only in the specified way. ...
Page 10 2. How to Implement the General Inspection After you get a new oscilloscope, it is recommended that you should make a check on the instrument according to the following steps: 1. Check whether there is any damage caused by transportation. If it is found that the packaging carton or the foamed plastic protection cushion has suffered serious damage, do not throw it away first till the complete device and its accessories succeed in the electrical and...
Page 11 3. How to Use the Oscilloscope The Structure of the Oscilloscope Front Panel and Keys The front panel and keys of the oscilloscope are shown in Figure 3- 1: Figure 3- 1:Front Panel of the Oscilloscope...
Page 12 Description: 1. CH1 and CH2 input connectors. 2. Waveform generator output connector (optional). 3. Display area. 4. The F1 - F4 keys are multi-function keys. In each menu mode, press the corresponding key to select the corresponding menu item. 5. After pressing the HOR key, through the key , you can change the horizontal time base setting, and observe the change of the state information caused by it;...
Page 13 15. Enter the system settings key. 16. Switch key for working state of oscilloscope and multimeter. 17. CH1 / CH2 - channel switch key. Side Panel Figure 3- 2: Side Panel of the Oscilloscope Description: 1. Probe compensation: 3.3V/1kHz square wave signal output. 2.
Page 14 Introduction to the User Interface of the Oscilloscope Figure 3- 3:Oscilloscope Interface Description: 1. The trigger status indicates the following information: Auto: Automatic mode. The waveform is being collected without triggering. Trig: A trigger has been detected and post trigger information is being collected.
Page 15 7. It indicates that there is a USB disk connecting. 8. Battery power and external power supply indication. 9. Channel 1 waveform. 10. The pointer indicates the trigger electrical level position of the channel. 11. Channel 2 waveform. 12. The icon indicates trigger-related information, including trigger channel, coupling mode, trigger type and trigger electrical level.
Page 16 System, the default probe menu attenuation coefficient setting value is 10X. 2. The switch on the oscilloscope probe is set to 10X and connected with the CH1 channel. Align the slot on the probe with the plug on the bayonet nut connector (BNC) of the CH1 connector and insert it, then turn the probe to the right and tighten it.
Page 17 probe to 10X (see "Probe Attenuation Coefficient Setting" in P9), and connect with CH1. If a hook probe is used, make sure it is in close contact with the probe. Connect the probe tip to the signal output connector of the probe compensator, and connect the reference wire clamp to the ground wire connector of the probe compensator, and then press the Auto key on the front panel.
Page 18 valid until it is changed again. Note: The preset setting of the probe attenuation coefficient in the menu when the oscilloscope is delivered is 10X. Make sure that the attenuation switch setting value on the probe is the same as the probe attenuation coefficient option in the oscilloscope menu.
Page 19 Before making any measurements, connect the probe to the instrument and connect the ground terminal to the ground. Vertical System The vertical system can be used to adjust the vertical scale, the position and other settings of the channel. Each channel has a separate vertical menu, which can be set individually for each channel.
Page 20 Horizontal System Press the HOR key to enter the horizontal system setting menu. Use the direction keys to change the horizontal scale (time base) and horizontal trigger position. When changing the horizontal scale, the waveform is enlarged or reduced relative to the center of the screen. When the horizontal position changes, the position relative to the waveform trigger point changes.
Page 21 For bandwidth ≤100MHz models, automatic range types include Frequency, Period, Amplitude, Maximum, Minimum, Peak-to-Peak value, Mean, and RMS. The description of the automatic measurement Function Menu is as follows: Function Menu Description Turn automatic measurement on or off. Source Set the source. Freq (F) □...
Page 22 Vamp: Voltage between Vtop and Vbase of a waveform. Cursor Measurement and F2 key to realize cursor measurement. Press The description of Cursor Measurement Menu is as follows: Function Description Setting Menu CH1 Voltage Select to display the CH1 voltage measurement cursor and menu.
Page 23 display and measure unknown signals. This function optimizes position, range, timebase, and trigger and ensures a stable display of any waveform. This feature is particularly useful for quickly checking several signals. To enable auto-setup, perform the following steps: 1. Connect the oscilloscope probe to the measured signal. 2.
Page 24 Set to prevent DC component from passing Coupling through. Set to allow all components to pass through. Auto Waveforms can be acquired without detecting trigger conditions. Normal The waveform is acquired only when the trigger Type conditions are met. Single When a trigger is detected, a waveform is sampled and then stopped.
Page 25 Save the current parameter settings of the Save oscilloscope to the internal memory. Call the settings saved in the current storage Recall location.  Reference Waveform The actual waveform can be compared with the reference waveform to find out the difference. Press the Save key to enter the save function menu, and press F2 to select the reference waveform to enter the reference waveform menu.
Page 26 wave1 File wave2 Select the file name of the name wave3 stored waveform. wave4 Wave Select the waveform channel to Source be saved. Store the waveform of the Save source in a csv file named by File the specified file name. image1 File image2...
Page 27 Menu Language Set the menu language. 10 min Set the automatic shutdown time. Unlimited Shutdown 30 min means no shutdown. Please pay attention to Time 60 min this setting if you use the battery only. Unlimited Enter the next menu After pressing this key, the instrument model, About serial number, version, and checksum can be...
Page 28 setting, otherwise, press the return key.  Automatic Calibration The automatic correction program can quickly make the oscilloscope reach the best condition to obtain the most accurate measurement value. You can execute this program at any time, but if the ambient temperature variation range reaches or exceeds 5℃, you must execute this program.
Page 29 4. How to Use the Multimeter About This Chapter This chapter introduces the multimeter function of the oscilloscope step by step, and provides some basic examples of basic operations and how to use the menu. Instrument Interface The multimeter uses four 4-mm safety banana plug input ends: A, mA, COM, Multimeter interface: Multimeter Interface Description:...
Page 30 Resist ------ Resistance measurement Diode ------ Diode measurement Cont ------ On/Off measurement ------ Capacitance measurement 2.Range indication: Manual means manual range; Auto means automatic range. 3. Current measurement range. 4. Indicating that there is a USB cable inserted. 5. Battery power indication. 6.
Page 31 5. How to Use the Waveform Generator(optional) The instrument can provide 4 basic waveforms, sine wave, square wave, ramp wave, pulse wave, and 8 arbitrary waveforms. Connect the output Press the Mode button to switch the instrument interface to the waveform generator function interface.
Page 32 Set the load 1. Press the System key to enter the system function menu. 2. Press the F4 key to enter the next page of menu. 3. Press the key to switch High Z / *Ω ("*" represents a value, the default is 50Ω).
Page 33 Set the Offset / Low level Press the key to switch to the Offset/Low level parameter, and then use the direction keys to set the desired value in the parameter column. Press F2 to switch between Offset / Low level. Output the square waveform Press the F1 key to enter the square waveform setting interface.
Page 34 Set the Pulse Width / Duty Cycle of the pulse waveform Press the key to switch to the Pulse width/Duty parameter, use the direction keys to set the desired value in the parameter column. Press F2 to switch between Pulse width / Duty. Set the Rise Time/Fall Time Press the F3 or F4 key to switch to the Rise Time/Fall Time parameter, use the...
Page 35 6. Communication with PC The oscilloscope supports communications with a PC through USB. You can use the Oscilloscope communication software to store, analyze, display the data and remote control. To learn about how to operate the software. Please download the oscilloscope communication software on our official download website and view it.
Page 36 7. Troubleshooting 1. The oscilloscope cannot be turned on. It may be that the battery is completely exhausted. At this time, even if the oscilloscope is powered by the power adapter, the oscilloscope cannot be turned on. You need to charge the battery first, and do not turn on the oscilloscope.
Page 37 RUN/STOP. Check whether the trigger mode of the trigger mode menu is normal or single, and the trigger electrical level is out of the waveform range. If so, center the trigger electrical level or set the trigger mode to automatic. In addition, you can press Auto to automatically complete the above settings.
Page 38 8. Technical Specifications Unless otherwise stated, all technical specifications are applicable to the probe with the attenuation switch set to 10X and this series of oscilloscopes. The oscilloscope must first meet the following two conditions to meet these specifications and standards: ...
Page 39 Characteristics Description Sweep speed range 5ns/div - 1000s/div, step by the 1-2-5 way (s/div) Time base accuracy ±100 ppm Record length 8K or 4K optional Sensitivity 10 mV/div～10 V/div (Volt/div) range Displacement range ±6 div Analog bandwidth 25MHz Single bandwidth Full bandwidth Vertical Low frequency...
Page 40 (typical) Frequency Square wave 1 kHz (±1%) (typical) Multimeter Characteristics Description Digital display 20,000 readings Voltage, current, resistance, capacitance, continuity test, Measurement type diode Maximum Input voltage AC : 750V DC : 1000V Maximum Input current AC : 10A DC : 10A Minimum Basic function Range...
Page 41 Minimum Basic function Range Accuracy resolution 1Ω 20.000kΩ 10Ω 200.00kΩ ±(0.8%+3dig) 0.1kΩ 2.0000MΩ 1kΩ 20.000MΩ ±(1%+3dig) 100.00MΩ 0.01MΩ ±(5%+10dig) 20.000nF 10pF 200.00nF 2.0000μF 0.1nF Capacitance ±(3.0%+10dig) 20.000μF 10nF 200.00μF 0.1uF 2.0000mF Continuity test √ (<50Ω) Diode test √(<0-2V) Others Auto range √...
Page 42 General Technical Specifications Display Characteristics Description Display type 3.5-inch color LCD display Display resolution 320 horizontal × 240 vertical pixels Display color 65536 colors Display Contrast Adjustable Power supply Characteristics Description 100 - 240 VACRMS, 50/60 Hz, CAT Ⅱ Power supply DC INPUT: 5VDC, 2A Power ＜5 W...
Page 43 9. Appendix Appendix A: List of Accessories  1 USB cable  1 passive probes  1 crocodile clip cable  1 set of multimeter probes (one red and one black)  1 user manual  1 probe correction adjustment knife Appendix B: Maintenance and Cleaning General maintenance Do not store or place the instrument in a place where the LCD screen will be...
Page 44 to avoid electrical short circuit or personal injury caused by moisture. Charging and Replacement of Battery During the long-term storage of the device, the battery may be too low due to the self-discharge of the lithium battery and the device cannot be turned on. This is a normal phenomenon.
Page 45 abnormal operation of the equipment). Note To avoid overheating of the battery during charging, the ambient temperature must not exceed the allowable value given in the technical specifications. Replacement of Lithium Battery Generally, the battery does not need to be replaced. However, when necessary, it can only be replaced by qualified personnel, and only lithium batteries of the same specification can be used.

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