Joy-it DSO-138 User manual

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3
DSO-138 Oscilloscope
3

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3DSO-138 Oscilloscope
Index
1. Technical specicaon
2. Usage
4. Security informaons

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Dear customer,
thank you for purchasing our product. Please nd our instrucons below.
1. Technical specicaon
The DSO-138 oers the fundamental funcons of an oscilloscope and shall impress with its
simplicity.
Max. sample raze 1 MSa/s
Analog bandwith 0 – 200 KHz
Sensivity range 10mV / div – 5V / div
Max. input voltage 50 Vpk
Input impedance 1M Ohm / 20 pF
Resoluon 12 Bit
Record length 1024
Timebase Range 500s/ Div – 10 us / Div
Trigger Modes Auto, Normal, Single
Trigger posion range 50%
Power supply 9V DC (8 – 12V)
Current consumpon ~ 120mA
Dimension 117 x 76 x 15 mm
Weight 70g

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2. Usage
The DSO-138 oscilloscope is ready to use and does‘t need any further conguraons.
Please note the connecon-diagram below:
[CPL]: Switch between zwischen AC, DC und GND
[SEN1]: rst sensivity seng
[Sen2]: second sensivity seng
[OK]: Stop current view
[+] / [-]: Congure the [SEL] parameter
[SEL]: choose parameter

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Calibraon:
Because there are always some small tolerances, you are able to calibrate your device.
If this is necessary, please follow the following steps:
1. Connect the red clip to the test-signal-terminal.
2. Set [SEN1] to 0.1V and [SEN2] to X5.
3. Set [CPL] to AC ot DC.
4. Set mebase to 0.2ms. You should now see a wave-diagram (see below).
5. Set C4 with a screwdriver unl the signal is good.
6. Set [SEN1] to 1V and [SEN2] to X1. Set C6 unl you see a rectangular wave-diagram.
Triggermodes:
Triggers are special events which are toggled when a voltage level is reached.
Oscilloscopes are using triggers as reerence-points to display a stable wave-form.
Auto-Mode: Display is refreshed automacally. The triggers are not inuecing this.
Normal Mode:Display is refreshed by triggers.
Single Mode: Display is refreshed by a trigger and switches to HOLD.

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4. Security informaons
Please note our security informaons: This product is for usage in dry rooms only. It must not get wet or mo-
ist.
This is no toy and small parts can be swallowed and lead to death.
We can not ensure a perfect funcon by using third-party supplies.
The device can be damaged by higher voltage and could cause re or lead to damage by an electric shock.