User Manual for TOOLTOP ET827 2-in-1 Portable Digital Oscilloscope Multimeter

1. บทนำ

The TOOLTOP ET827 is a versatile, portable 2-in-1 instrument combining the functionalities of a digital oscilloscope and a 6000-count True RMS (T-RMS) multimeter. Designed for engineers, technicians, and hobbyists, it offers precise measurements for voltage, current, resistance, frequency, diode, transistor HFE, and temperature, alongside waveform analysis capabilities. Its compact design and clear interface make it suitable for various applications, including outdoor research, production, debugging, and circuit repair.

Image: The TOOLTOP ET827 device, its retail packaging, test leads, and user manual, illustrating the complete product package.

Image: The TOOLTOP ET827 device shown with its integrated kickstand extended, providing a stable viewing angle for benchtop use.

2. คุณสมบัติหลัก

• ฟังก์ชั่นคู่: Combines a 40MHz digital oscilloscope and a 6000-count T-RMS multimeter.
• สูง Sampหลิงอัตรา: 200MSPS แบบเรียลไทม์ampling rate for accurate waveform capture.
• Oscilloscope Modes: Features Auto, Normal, and Single trigger modes for various measurement needs.
• Multimeter Capabilities: วัดปริมาตร DC/ACtage, DC/AC current, resistance, frequency, diode, transistor HFE, and temperature.
• การจัดเก็บข้อมูล: Stores up to 100 sets of measurement data and 50 waveforms.
• แสดง: 240x160 LCD with a 60mm x 40mm display area and black screen with white backlight.
• ระบบป้องกันการโอเวอร์โหลด: Equipped with 500mA and 10A double fuses for enhanced safety.
• ปิดเครื่องอัตโนมัติ: เครื่องจะปิดอัตโนมัติหลังจากไม่มีการใช้งาน 15 นาที เพื่อประหยัดพลังงานแบตเตอรี่

ภาพ: ด้านหน้า view of the ET827, emphasizing its 40MHz bandwidth and 200MSPS sampling rate, along with icons representing automatic oscilloscope, waveform adjustment, data storage, TRMS, and multimeter functions.

ภาพ: รายละเอียด view of the ET827's front panel, illustrating various functions such as oscilloscope, multimeter, automatic oscilloscope, waveform adjustment, overload protection, data storage, and automatic shutdown, each represented by an icon.

3. การตั้งค่าและการใช้งานเบื้องต้น

3.1 การติดตั้งแบตเตอรี่

The ET827 requires three AA batteries (not included). To install, locate the battery compartment on the rear of the device. Open the cover, insert the batteries according to the polarity indicators (+/-), and securely close the compartment.

3.2 การเปิด/ปิดเครื่อง

To power on the device, rotate the central rotary switch from the 'OFF' position to any desired measurement function (e.g., V~, V-, OSC). To power off, rotate the switch back to the 'OFF' position. The device also features an automatic shutdown function after 15 minutes of inactivity.

3.3 การเชื่อมต่อสายทดสอบ

Connect the red test lead to the 'VΩCx mA°C' input jack and the black test lead to the 'COM' (common) input jack for most voltage, resistance, capacitance, and temperature measurements. For current measurements (10A), connect the red lead to the '10A' input jack. Ensure connections are firm and secure.

Image: The ET827 device with red and black test leads connected to its input jacks, demonstrating proper setup for measurement.

4. คู่มือการใช้งาน

4.1 ฟังก์ชันของมัลติมิเตอร์

Rotate the central switch to the desired multimeter function. The ET827 supports the following measurements:

• เล่มที่tage (DC/AC): Select 'V-' for DC voltage or 'V~' for AC voltage.
• กระแสไฟฟ้า (DC/AC): Select 'mA~' or 'mA-' for milliampere current, or '10A~' or '10A-' for ampเป็นปัจจุบัน
• ความต้านทาน (Ω): Select 'Ω' to measure resistance.
• ความถี่ (Hz): Integrated with voltage/current functions or a dedicated Hz setting.
• การทดสอบไดโอด: Select the diode symbol to test diodes.
• การทดสอบ HFE ของทรานซิสเตอร์: Use the dedicated HFE setting for transistor gain measurement.
• Temperature Test (°C): Select '°C' for temperature measurement (requires a K-type thermocouple, not included).
• ความจุ (F): Select 'F' to measure capacitance.

Image: The ET827 displaying a capacitance measurement of 95.70 µF, with test leads and a capacitor connected, demonstrating its capacitance measurement capability.

4.2 ฟังก์ชันของออสซิลโลสโคป

Rotate the central switch to the 'OSC' position to activate the oscilloscope. The ET827 features a 40MHz bandwidth and 200MSPS real-time sampอัตราลิง

• โหมดทริกเกอร์: The device offers three trigger modes:
• อัตโนมัติ: Suitable for general users, providing one-button auto-capture and display of waveforms.
• ปกติ: For professional users, allowing independent adjustment of waveform parameters.
• เดี่ยว: Ideal for capturing low-frequency pulses or single-shot events.
• การปรับรูปคลื่น: Use the function buttons (F1-F4) to adjust parameters such as vertical scale (V/div), horizontal time base (s/div), and trigger level.

Image: A visual guide explaining the three waveform acquisition modes (Auto, Normal, Single) available on the ET827, detailing their typical use cases and characteristics.

4.3 Data Storage and Waveform Saving

The ET827 allows users to save measurement data and waveforms for later review. Refer to the on-screen menu or dedicated buttons (if available) for saving and recalling stored data. The device can store up to 100 sets of data and 50 waveforms.

5. การบำรุงรักษา

5.1 การทำความสะอาด

ในการทำความสะอาดเครื่อง ให้ใช้ผ้านุ่ม damp cloth. Do not use abrasive cleaners, solvents, or immerse the device in water. Ensure the device is powered off before cleaning.

5.2 การเปลี่ยนแบตเตอรี่

When the low battery indicator appears on the display, replace the three AA batteries promptly to ensure accurate measurements and proper operation. Follow the battery installation steps outlined in Section 3.1.

5.3 การเปลี่ยนฟิวส์

The ET827 is protected by internal fuses (500mA and 10A) to prevent damage from overcurrent. If the device fails to measure current or shows incorrect readings for current, the respective fuse may need replacement. Fuse replacement should only be performed by qualified personnel. Refer to the device's internal diagram or contact customer support for guidance.

Image: An illustration of the ET827's overload protection feature, highlighting automatic circuit cut-off for voltage overload and the presence of 500mA and 10A double fuses for robust protection.

6 การแก้ไขปัญหา

If you encounter issues with your ET827, refer to the following common problems and solutions:

• อุปกรณ์ไม่เปิดเครื่อง: Check battery installation and ensure batteries are fresh. Verify the rotary switch is set to an active function, not 'OFF'.
• ไม่มีการแสดงผลหรือแสดงผลไม่ชัด: Replace batteries. Ensure the display area is clean.
• การอ่านค่ามัลติมิเตอร์ที่ไม่แม่นยำ: Check test lead connections. Ensure the correct function is selected for the measurement. Verify the battery level.
• ไม่มีรูปคลื่นแสดงในโหมดออสซิลโลสโคป: Check probe connections. Ensure the input signal is within the device's measurement range. Adjust trigger settings (level, mode) and time base/vertical scale.
• Device shuts down unexpectedly: This may be due to the automatic shutdown feature. If it occurs frequently during active use, replace batteries.

For persistent issues not covered here, please contact TOOLTOP customer support.

7. ข้อมูลจำเพาะ

8. การรับประกันและการสนับสนุน

The TOOLTOP ET827 is manufactured to high-quality standards. For information regarding warranty coverage, terms, and conditions, please refer to the documentation provided with your purchase or visit the official TOOLTOP website. For technical support, troubleshooting assistance, or spare parts inquiries, please contact TOOLTOP customer service through their official channels. Please retain your proof of purchase for warranty claims.