Joy-it JT-DMSO2D72 Manual 

1. GENERAL INFORMATION Dear customer, Thank you for choosing our product. Please read the following im- portant information before putting the device into operation. This oscilloscope is compact, portable and flexible. It has a TFT-LCD color display with a resolution of 320 x 240 pixels and adjustable backlight brightness. The maximum real time sampling rate can be up to 250 MSa/s. USB memory devices are also supported, the user can upgrade the firm- ware via USB, the edge trigger function is automatically detected and it has a user-defined fast offset calibration with A/D conv ...

Safety Terms and Symbols: following terms may appear on product: Danger It represents that harms may be caused to you at once if you per- form the operation. Warning It represents that latent harms may be caused to you if you per- form the operation. Notice It represents that damage may possibly caused to the product or other properties if you perform the operation. Symbols on the product: following symbols may appear on product: General Safety Summary Read the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To evade potential haz- ards, use this product only as spe ...

tential. Do not connect the ground lead to an elevated voltage. Check all terminal ratings. To avoid fire or shock hazard, check all ratings and markings on the product. Refer to the product manual for detailed in- formation about ratings before making connections to the product. Do not operate without covers. Do not operate this product with covers or panels removed. Avoid exposed circuitry. Do not touch exposed connections and compo- nents when power is present. Do not operate with suspected failures. If you suspect there is damage to this product, have it inspected by qualified ...

typical Typical 20 MHz (reduced to 6 MHz when using a 1x probe) Low frequency response (-3db) ≤ 10 Hz DC gain accuracy 10V/div - 10mV/div ±3% for normal or Trigger Type Edge Mode Auto, Normal, Single Level ± 4 divisions from centre of screen Trigger level accuracy 0,2 div*volts/div within 4 div. Slope Rising, falling, rising & falling Source CH1, CH2 Input Coupling DC, AC or GND Input impedance (DC coupled) 25pF ±3pF, 1MΩ ±2% Probe attenuation 1X, 10X Supported probe attenuation factors 1X, 10X, 100X, 1000X Input protection voltage 150 VRMS Measurement Values between cursors Voltage Difference: △V Time Dif ...

≤ 40°C: ≤90% RH, 40-50°C: ≤60% RH Cooling Method Convection Altitude: -Operating and Nonoperating 3 000 m (10 000 feet) -Random vibration 0.31 gRMS from 50 - 500Hz, 10 minutes on each axis -Nonoperating 2,46 gRMS from 5 - 500 Hz, 10 minutes on each axis Mechanical shock in operation 50 g, 11 ms, half sine Dimensions 199 x 98 x 40 mm Weight 624 g Arbitrary Waveform Generator: Waveform Frequency Sine: 1Hz-25MHz; Square: 1Hz-10MHz; Ramp: 1Hz-1MHz; Expon: 1Hz-5MHz Sampling rate 250 MSa/s Amplitude 2.5 Vpp (50Ω)/5Vpp (High impedance) Frequency resolution 0,1 % Channel CH1 waveform output Waveform depth 512Sa Vertical ...

100uV 4.000V 1mV 40.00V 10mV 400.0V 100mV 600.0V ±（1% + 2） 1V Overload protection: 400mV: 250V, other: 600Vrms. AC Voltage 4.000V ±（1.2% + 5） 1mV 40.00V 10mV 400.0V 100mV 600.0V ±（1.5% + 5） 1V Frequency: 40Hz~400Hz; Frequency of 400V and 600V: 40Hz~100Hz DC Current 40.00mA ±（1% + 2） 10uA 200.0mA ±（1.5% + 2） 100uA 4.000A ±（1.8% + 2） 1mA 10.00A ±（3% + 2） 10mA Overload protection: self restoring fuse: 200mA/250V, 4A and 10A range no fuse. AC Current 40.00mA ±（1.3% + 2） 10uA 400.0mA ±（1.8% + 2） 100uA 4.000A ±（2% + 3） 1mA 10.00A ±（3% + 5） 10 ...

checking an oscilloscope to see if it complies with these specifications, make sure it meets the following conditions: The oscilloscope must have been operating continuously for twenty minutes un- der the specified operating temperature. The Do Self Cal operation must be performed through the Utility menu if the oper- ating temperature changes by more than 5°C. The oscilloscope must be within the factory calibration interval. All specifications are guaranteed unless noted ‘typical’. This Oscilloscope is a small, lightweight portable instrument which provides the user wit ...

When using the instrument, you can open the support foot to tilt the instrument upward for easy operation and observation. When the instrument is not in use, the user can close the support foot to facilitate placement or han- dling. After adjusting the rack, the instrument can be suspended on the vertical plane. • Front Panel The following diagram briefly describes the front panel of this oscilloscope. ...

• Functional Check Follow the steps below to perform a quick functional check to your oscilloscope. Power Press the power key and the device starts. Press the power key again, and the de- vice will shut down. Before starting it, please confirm that the battery has enough power. The oscilloscope is supplied with a power adapter with USB-Type-C plug. The input AC power supply is 100~240V, 50~60Hz. The output is 5V@2A. The power adapter can be used to supply the oscilloscope or charge the battery. When connect the power adapter to the oscilloscope, if the battery is not installed inside the oscilloscope, the power key backlight is ...

of about 2V peak-to-peak at 1KHz in the display. Repeat the steps to observe CH2. • Probe check Safety When using the probe, keep your fingers behind the guard on the probe body to avoid electric shock. Do not touch metallic portions of the probe head while it is connected to a voltage source. Connect the probe to the oscilloscope and connect the ground terminal to ground before you start any measurements. Manual Probe Compensation Upon the first connection of a probe and an input channel, you should manually perform this adjustment to match the probe to the input channel. ...

and select the Probe option that matches the attenuation factor of your probe. Make sure that the Attenuation switch on the probe matches the Probe option in the oscillo- scope. Switch settings are 1X and 10X. When the Attenuation switch is set to 1X, the probe limits the bandwidth of the oscilloscope to 6MHz. To use the full bandwidth of the oscil- loscope, be sure to set the switch to 10X. Menu and Control Keys All the keys are described as follows: Scope: Oscilloscope mode DMM：Multimeter mode AWG：Waveform generator Menu：Function menu Trig：Trigger setting menu Ente ...

corresponding menu items in the screen. • Connectors Gen Out: The Gen Out terminal of the oscilloscope without signal genera- tor function always outputs 2V @ 1KHz square wave. Shortcut keys. Long press this button to enter the menu, and choose shortcut key function; After setting, press this button sin- gle time to respond to the corresponding function. In scope, stop or run the waveform acquisition; In DMM, hold the measuring data or update data; In generator, turn on or off the waveform output. Power key. ...

button, the oscilloscope will identify the type of waveform (sine or square wave) and adjust controls according to input signals so that it can accurately display the wave- form of the input signal. The Auto function examines all channels for signals and displays corresponding waveforms. Auto determines the trigger source according to the following conditions : If multiply channels get signals, the oscilloscope will use the channel with the lowest frequen- cy signal as the trigger source. If no signals are found, the oscil- loscope will use the lowest ...

Press button, pops up the prompt to recall the default settings on the screen, now press F1 to confirm. The oscilloscope will display the CH1 waveform and remove all the others. Press F4 to cancel. The table below gives the options, buttons and con- trols that change settings at default setup. The following settings do not change when you recall default settings: Language options, saved settings, saved waveforms, saved reference waveforms, calibration data. • Horizontal System Press Time button to enter horizontal system menu, use the direction keys to change the horizontal scale ...

tings of the channel. Each channel has a separate vertical menu, and each channel can be set separately. 1.Vertical Position Press Channel->F1 to select the channel, and press Up or Down direction keys to move the vertical position of the selected channel. 2. VOLTS/DIV Settings The range of Volt/div is 10mV/div-10V/div (1X), or 100mV/div-100V/div (10X), 1V/div- 1000V/div (100X), step by 1-2-5. Press Channel->F1 to select the channel, and press Right or Left direction keys to change the Volt/div of the selected channel. 3. Channel Setting Menu • Trigge ...

trigger slope to rising, falling, rising & falling. Trigger Mode: You can select the Auto or Normal mode to define how the oscil- loscope acquires data when it does not detect a trigger condition. Auto Mode per- forms the acquisition freely in absence of valid trigger. It allows the generation of untriggered waveforms with the time base set to 100ms/div or slower. Normal Mode updates the displayed waveforms only when the oscilloscope detects a valid trigger condition. Before this update, the oscilloscope still displays the old waveforms. This mode shall be used when you only want to view the effectively triggered wave- forms. In this ...

actual waveforms with the reference waveforms to find out the differences. Press Menu button to enter, and select Ref to enter reference Waveform menu. REF Menu Table: To save the reference waveform, follow these steps: Press F1 to select the position of the reference waveform. Press F2 to open the REF channel. Press F3 to select the source to CH1 (or CH2), and only select the open channel. Press F4 to save the current waveform to the specified location. • Measurement Scale measurement Graticule: This method allows you to make a quick, visual estimate ...

1. Press F1 to open the cursor measurement; 2. Press F2 to select a type of cursor measurement. 3. Press F3 to select the channel that needs to be measured. 4. Press F4 to enter the second page, press F1 or F2 to select Cursor1 or Cursor2, press up, down, left and right to move Cursor1 or Cursor1; 5. The result of cursor measurement will be displayed on the cursor menu. Automatic Measurement The oscilloscope provides 2 kinds of automatic measurements, including frequency and amplitude. Press Menu button to enter, select Measure to enter automatic measurement. Press F1 to open, the measurement results will b ...

cilloscope is plugged in with an external charging device or connected to a comput- er via a USB cable. 2. Shutdown automatically saves last setup. Self calibration The self calibration routine helps optimize the oscilloscope signal path for maxi- mum measurement accuracy. You can run the routine at any time but should al- ways run it if the ambient temperature changes by 5°C or more. For a more accu- rate calibration, please power on the oscilloscope and wait for 20 minutes until it has adequately warmed up. To do self calibration, follow these steps: 1. Ensure that ...

Press the power button to turn on, then press the "DMM" button to enter to the multi meter function interface; Press the up, down, left and right direction keys or F1, F2, F3, F4 multi-function keys to select "DC V", "DC mV" or "AC V"; Insert the black pen into the input port of the COM banana socket, and insert the red pen into the input port of the V/Ω/C banana port; Connect the red and black forms to the measured point. The voltage value of the measured point will be displayed on the screen. 2. DC and AC current measurement Press the power button to turn on, then press the "DMM" button to enter to the mu ...