คู่มือการใช้งานมัลติมิเตอร์ดิจิทัล 7 ฟังก์ชัน Cen-Tech

1. บทนำ

The Cen-Tech 7 Function Digital Multimeter is a versatile and essential tool designed for checking various electrical parameters in home electrical systems and other applications. Its user-friendly design makes it suitable for both beginners and experienced users.

คุณสมบัติหลัก:

• Automatic zero adjust
• Overange indicator
• 2.5x second sampเวลา
• ไฟแสดงสถานะแบตเตอรี่ต่ำ
• Fuse and diode protected circuit

Figure 1: Cen-Tech 7 Function Digital Multimeter (front view in packaging)

2. การตั้งค่า

2.1 การติดตั้งแบตเตอรี่

The multimeter requires one 9V battery for operation. To install or replace the battery:

1. ค้นหาฝาครอบช่องใส่แบตเตอรี่ที่ด้านหลังของมัลติมิเตอร์
2. Remove the screw(s) securing the cover (if present).
3. ถอดฝาครอบออกอย่างระมัดระวัง
4. Connect a new 9V battery to the battery clips, ensuring correct polarity.
5. Place the battery inside the compartment and replace the cover, securing it with the screw(s).

2.2 การเชื่อมต่อสายทดสอบ

The multimeter comes with two test leads, typically one red and one black. Connect them as follows:

• ใส่ สีดำ test lead into the "COM" (Common) jack. This is the negative (-) terminal.
• ใส่ สีแดง test lead into the "VΩmA" jack for most voltage, resistance, and current measurements. For higher current measurements (up to 5A), use the "5ADC" jack. This is the positive (+) terminal.

3. คู่มือการใช้งาน

Before taking any measurements, ensure the test leads are correctly connected and the rotary switch is set to the appropriate function and range for the measurement you intend to make.

3.1 เปิด/ปิดเครื่อง

To turn the multimeter on, rotate the central dial from the "OFF" position to any desired measurement function. To turn it off, rotate the dial back to "OFF".

3.2 ฟังก์ชันการวัดพื้นฐาน

• DC ฉบับที่tagอี (ดีซีวี): Used to measure direct current voltage. Select the appropriate DCV range (e.g., 20V, 200V, 250V) based on the expected voltage.
• ฉบับ ACtagอี (ACV): Used to measure alternating current voltage. Select the appropriate ACV range (e.g., 200V, 250V).
• ความต้านทาน (Ω): Used to measure electrical resistance in Ohms. Select the appropriate Ohm range (e.g., 200Ω, 2000Ω, 20kΩ, 200kΩ, 2000kΩ).
• DC Amperage (DCA): Used to measure direct current in Amperes. Select the appropriate DCA range (e.g., 200µA, 2000µA, 20mA, 200mA, 5A).

Always start with a higher range setting if the voltage or current is unknown to prevent damage to the multimeter.

Figure 2: Back of Multimeter Packaging with Features and Specifications

4. การบำรุงรักษา

4.1 ไฟแสดงสถานะแบตเตอรี่ต่ำ

The multimeter is equipped with a low battery indicator. When the battery voltage drops below the operational level, a battery symbol will appear on the display. Replace the 9V battery promptly to ensure accurate readings.

4.2 Fuse and Diode Protected Circuit

The multimeter features a fuse and diode protected circuit to prevent damage from overloads. If the multimeter stops functioning or provides incorrect readings, check the internal fuse. Refer to the specifications for the correct fuse type and rating.

4.3 การทำความสะอาดและการเก็บรักษา

Clean the multimeter with a soft, dry cloth. Do not use abrasive cleaners or solvents. Store the multimeter in a cool, dry place away from direct sunlight and extreme temperatures. Remove the battery if the device will not be used for an extended period.

5 การแก้ไขปัญหา

If you encounter issues with your Cen-Tech 7 Function Digital Multimeter, consider the following common troubleshooting steps:

• ไม่มีจอแสดงผล/จอแสดงผลจาง: Check the battery. Ensure it is properly installed and has sufficient charge. Replace if necessary.
• การอ่านไม่ถูกต้อง:
  • Verify that the test leads are securely connected to the correct jacks.
  • Ensure the rotary switch is set to the correct function (DCV, ACV, Ω, DCA) and range for the measurement.
  • Check for continuity in the test leads themselves.
  • If measuring resistance, ensure the circuit is de-energized.
• บ่งชี้โอเวอร์โหลด: If the display shows "OL" or an overrange indicator, it means the measured value exceeds the selected range. Switch to a higher range setting.
• No Reading on Current Measurement: Ensure the red test lead is in the correct current jack (VΩmA or 5ADC) and the circuit is in series with the multimeter. Check the internal fuse if applicable.

For persistent issues, contact Cen-Tech customer support or consult a qualified electrician.

6. ข้อมูลจำเพาะ

7. การรับประกันและการสนับสนุน

For information regarding warranty coverage, returns, or technical support for your Cen-Tech 7 Function Digital Multimeter, please refer to the documentation included with your purchase or visit the official Cen-Tech webไซต์ คุณสามารถติดต่อผู้ขายโดยตรงเพื่อขอความช่วยเหลือได้

ผู้ผลิต: Cen-Tech

ASIN: B012CNUI18