Products > Test Equipment
New 2ch pocket DSO+SG - Zeeweii DSO2512G
Sham73:
--- Quote from: Aldo22 on April 26, 2024, 05:12:11 pm ---https://www.eevblog.com/forum/testgear/new-2ch-pocket-dsosg-sigpeak-dso2512g/msg5083081/#msg5083081
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I have firmware 1.3.0C. Is there an update 1.3.0C+ for it too?
Sham73:
--- Quote from: Aldo22 on April 26, 2024, 05:12:11 pm ---**Open user calibration function.
How to perform AC Gain calibration:
1. The oscilloscope measures the 2.5V 1Khz sin waveform. Observe the "PKPK" measurement item.
2. Open Menu-> Meas, then press the CH1CH2 button, and then long press the [mV] key to enter the AC Gain calibration mode.
3. The UP DOWN button is used to increase/decrease the CH1 Gain until the "PKPK" voltage is equal to or close to the voltage of the signal generator.
4. The LEFT RIGHT button is used to increase/decrease the CH2 Gain until the "PKPK" voltage is equal to or close to the voltage of the signal generator.
5. Press the OK button to exit and complete the calibration.
How to perform DC offset calibration:
1. The oscilloscope measures the DC power supply. Observe the "Mean" measurement item.
2. Open Menu-> Meas, then press the CH1CH2 button, and then long press the [V] key to enter the DC offset calibration mode.
3. The UP / DOWN button is used to increase/decrease the CH1 dc offset until the "Mean" voltage is equal to or close to the voltage of the multimeter.
4. The LEFT / RIGHT button is used to increase/decrease the CH2 dc offset until the "Mean" voltage is equal to or close to the voltage of the multimeter.
5. Press the OK button to exit and complete the calibration.
Different vertical sensitivities use different calibration parameters, so they need to be calibrated separately.
**add [ZOOM]
Long press the "s" key to turn on/off Zoom mode.
(Zoom is not supported when roll mode or cursor is on\
It is recommended to exit Zoom mode before shutting down to avoid measure item are cleared)
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What sources do you use for AC and DC calibration?
Aldo22:
--- Quote from: Sham73 on April 26, 2024, 09:33:38 pm ---What sources do you use for AC and DC calibration?
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With what I had at hand.
I took my FY3224s and verified the voltage with the multimeter. This for all voltage ranges, but only at 1kHz.
Here is a photo of it: https://www.eevblog.com/forum/testgear/new-2ch-pocket-dsosg-sigpeak-dso2512g/msg5086450/#msg5086450
Today I might do it with my second scope.
But you shouldn't exaggerate, it's not a high precision device. ;)
Sham73:
--- Quote from: Aldo22 on April 26, 2024, 09:54:32 pm ---But you shouldn't exaggerate, it's not a high precision device. ;)
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Do you mean FY3224s... or DSO2512G?
Aldo22:
--- Quote from: Sham73 on April 27, 2024, 08:31:49 am ---
--- Quote from: Aldo22 on April 26, 2024, 09:54:32 pm ---But you shouldn't exaggerate, it's not a high precision device. ;)
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Do you mean FY3224s... or DSO2512G?
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Both of course. ;)
Both are pretty much the cheapest usable representatives of their kind.
FY3224s has quite good precision (frequency response) up to 10MHz / 10V, but is not very accurate, i.e. the multimeter shows slightly different values in certain voltage ranges from what is set on the FY3224s.
Normal oscilloscopes are rarely very accurate. 2%-5% voltage is normal.
That's OK, just don't overdo the calibration, it won't be like a multimeter.
https://en.wikipedia.org/wiki/Accuracy_and_precision
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