Cara Mengalibrasi (Kalibrasi) Osiloskop Analog - 2122600059

Summary

In this instructional video, Dewa Gede Angkasa from the Electronics Engineering Department of Surabaya Polytechnic explains how to calibrate an oscilloscope. He outlines the necessary tools and steps, including connecting the oscilloscope to a power source, using the probe correctly, and adjusting various settings for accurate calibration. Gede also provides formulas for calculating voltage (Vpp) and frequency to ensure precise results. The demonstration concludes with the successful calibration of the oscilloscope, making it ready for measuring AC and DC waveforms from various sources.

Takeaways

• 🛠️ Introduction to calibration: Calibration ensures measurement tools have accurate readings.
• 👨‍🔧 Presenter introduction: Dewa Gede Angkasa from D4 Electronics, Politeknik Elektronika Negeri Surabaya.
• 📊 Calibration tools: Requires three main tools – an analog oscilloscope, a probe, and a power supply unit (PSU).
• 🔌 Power connection: Connect oscilloscope power using PSU for safety and accident prevention.
• 🔗 Probe setup: Positive and negative parts of the probe must be correctly connected to oscilloscope channels.
• 🌀 Calibration process: Use oscilloscope's built-in calibration signal (2Vpp, 1kHz) to adjust settings.
• ⚙️ Adjusting settings: Fine-tuning oscilloscope controls like AC mode, position, amplitude, and focus to obtain a clear waveform.
• 🔍 Measurement: Calculate peak-to-peak voltage (Vpp) and frequency using waveform parameters and formulas.
• 📐 Frequency calculation: Use the formula 1/period to determine frequency; confirmed as 1000 Hz or 1kHz.
• ✅ Calibration confirmation: Calibration successful when the oscilloscope readings match the standard (2Vpp, 1kHz).

Q & A

What is the main purpose of calibrating an oscilloscope?

The purpose of calibrating an oscilloscope is to ensure that it has accurate measurements for voltage and frequency.

What tools are required for the calibration process?

Three tools are required: an analog oscilloscope, a probe, and a power supply unit (PSU).

How is the oscilloscope connected to the power supply?

The oscilloscope is connected to the power supply by attaching the connector to the oscilloscope and the PSU.

What safety precaution is mentioned in the script?

The safety precaution mentioned is to ground the oscilloscope to avoid accidents.

What is the calibration voltage and frequency of the oscilloscope?

The oscilloscope's calibration voltage is 2 volts peak-to-peak (Vpp) and the frequency is 1 kHz.

How do you ensure the waveform is clear on the oscilloscope screen?

You adjust the volts/div, time/div, position controls, focus, intensity, and variable settings to ensure the waveform is clear and stable.

What formulas are used to calculate Vpp and frequency?

For Vpp, the formula is: Probe scale × volts/div × vertical boxes. For frequency, it's 1/period, where the period is time/div × horizontal boxes.

How is the vertical scale (Vpp) calculated during calibration?

Vpp is calculated by multiplying the probe scale (1x), the volts/div setting (0.5 volts), and the number of vertical boxes (4), giving 2 volts.

How is the frequency calculated from the period?

The period is calculated by multiplying the time/div setting (0.5 seconds) by the number of horizontal boxes (2), resulting in 1 ms. The frequency is 1/period, which is 1000 Hz or 1 kHz.

What does proper oscilloscope calibration allow the user to do?

Once calibrated, the oscilloscope can be used to measure AC and DC waveforms accurately.