DSO-111 Oscilloscope Quick Guide i
Table of Contents 1. General Safety Requirements.................................................................................. 1 2. Safety Terms and Symbols....................................................................................... 2 3. User Guidebook........................................................................................................... 4 Structure of the Oscilloscope................................................................................................
1.General Safety Requirements 1. General Safety Requirements Before use, please read the following safety precautions to avoid any possible bodily injury and to prevent this product or any other connected products from damage. To avoid any contingent danger, ensure this product is only used within the range specified. Only the qualified technicians can implement the maintenance. To avoid Fire or Personal Injury: Connect the probe correctly.
2.Safety Terms and Symbols 2. Safety Terms and Symbols Safety Terms Terms in this manual. The following terms may appear in this manual: Warning: Warning indicates the 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. Terms on the product. The following terms may appear on this product: Danger: It indicates an injury or hazard may immediately happen.
2.Safety Terms and Symbols To avoid body damage and prevent product and connected equipment damage, carefully read the following safety information before using the test tool. This product can only be used in the specified applications. Warning: In X-Y mode, the X Input and Y Input of the oscilloscope are not electrically isolated. The channels should adopt a common ground during measuring. To prevent short circuits, the 2 probe grounds must not be connected to 2 different non-isolated DC levels.
3.User Guidebook 3. User Guidebook Structure of the Oscilloscope This chapter makes a simple description of the operation and function of the front panel of the oscilloscope, enabling you to be familiar with the use of the oscilloscope in the shortest time. Front Panel Figure 3- 1 Front panel No. Name Description 1 Display screen Display the trace. 2 Run/Stop Enable or disable sampling on input signals. 3 Var (right side) Provides continuously variable sweep rate.
3.User Guidebook 5 Level Control signal trigger to sweep at certain level. Towards "-": The triggering level moves downward on the display waveform. Towards "+": The triggering level moves upward on the display waveform. 6 Time/DIV Select the sweep rate. Lock When the Lock button is pressed down, the triggering level is automatically maintained at optimum value irrespective of the signal amplitude, requiring no manual adjustment of triggering level. Norm/Auto/TV Select the desired trigger mode.
3.User Guidebook 15 +/-/XY +: Trigger on rising slope. Triggering occurs when the triggering signal crosses the triggering level in positive-going direction. -: Trigger on falling slope. Triggering occurs when the triggering signal crosses the triggering level in negative-going direction. XY: This position is used when using the instrument as an X-Y oscilloscope. 16 Volts/DIV Adjusting sensitivity of vertical system. 17 △ ▽Position Control vertical position of trace on the screen.
3.User Guidebook No. Name Description 20 AC Power input Connect the supplied AC power cord to this connector connector. 21 Fuse holder Fuse rating is 1A, T class, 250 V. 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.
3.User Guidebook Int/Line/Ext AC/DC/ Lock 10 13 7 Int Pressed down 2. Connect the power cord to the AC line outlet. Press the power switch ○ — on the front panel to power on, the screen will light up. A few seconds later, a trace will appear on the screen. 3. Align the trace with the horizontal center line of the graticule by adjusting the △ ▽ Position knob. 4. Connect the probe to the Y Input terminal and apply the 0.5Vpp CALIBRATOR signal to be probe tip. 5. Set the AC/DC/ switch to the AC state.
3.User Guidebook Compensated correctly Overcompensated Under compensated Figure 3- 3 Displayed Waveforms of the Probe Compensation Figure 3- 4 Adjust Probe Set the Probe Attenuation Coefficient The probe has several attenuation coefficients, which will influence the vertical scale factor of the oscilloscope. The set values of the probe switch are 1X and 10X (see Figure 3- 5).
3.User Guidebook Figure 3- 6 Finger Guard Warning: To avoid electric shock, always keep your finger behind the safety guard ring of the probe during the operation. To protect you from suffering from the electric shock, do not touch any metal part of the probe tip when it is connected to the power supply. Before making any measurements, always connect the probe to the instrument and connect the ground terminal to the earth.
3.User Guidebook The signal must be centered and kept in the horizontal direction. Figure 3- 7 Lissajous Graph Based on the expression sin (q) =A/B or C/D, thereinto, q is the phase difference angle, and the definitions of A, B, C, and D are shown as the graph above. As a result, the phase difference angle can be obtained, namely, q =± arcsin (A/B) or ± arcsin (C/D).
4.Troubleshooting 4. Troubleshooting 1. Oscilloscope is powered on but no display. Check whether the power connection is connected properly. Check whether the fuse which is beside the AC power input jack is blew (the cover can be pried open with a straight screwdriver). Restart the instrument after completing the checks above. If the problem persists, please contact us and we will be under your service. 2. After acquiring the signal, the waveform of the signal is not displayed in the screen.
5.Appendix 5. Appendix Appendix A: Enclosure (The accessories subject to final delivery.) Standard Accessories: Power cord x 1 Quick guide EN x 1 Quick guide DE x 1 Safety Hintsheet x 1 Probe x 1 Probe adjust x 1 Fuse x 1 Appendix B: General Care and Cleaning General Care Do not store or leave the instrument where the display will be exposed to direct sunlight for long periods of time. Caution: To avoid any damage to the instrument or probe, do not exposed it to any sprays, liquids, or solvents.
