DIGITAL AC/DC AMMETER – FULL DESCRIPTION

A Digital AC/DC Ammeter is an electronic measuring instrument used to accurately measure electrical current in both AC (Alternating Current) and DC (Direct Current) circuits. It displays the measured current on a digital screen, offering high precision, easy readability, and reliable performance for industrial, laboratory, and field applications.

This instrument is widely used in NDT equipment, electrical panels, maintenance work, and testing of motors, transformers, coils, yokes, and MPI machines.

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✔ Types of Digital AC/DC Ammeters

1. Clamp-Type Ammeter

• Measures current without breaking the circuit

• Uses a split-core clamp

• Highly safe and convenient

2. Inline Ammeter

• Connected directly in series with the circuit

• Provides high accuracy

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✔ What It Measures

• AC Current (Ampere)

• DC Current (Ampere)

• Sometimes additional parameters:
  ✔ Voltage (AC/DC)
  ✔ Resistance
  ✔ Frequency
  ✔ Continuity

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✔ Working Principle

For AC Current:

Uses current transformer (CT) or Hall Effect sensor to detect the alternating magnetic field generated by AC flow.

For DC Current:

Uses Hall Effect technology to sense magnetic flux created by steady DC current.

The signal is processed by internal electronics and shown digitally on the LCD screen.

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✔ Construction & Components

1. Clamp Jaw / Test Leads

   • Clamp jaw for non-contact current measurement

   • Test leads for inline measurement

2. Digital Display (LCD/LED)

   • Clear, bright readout of current values

3. Selector Dial / Function Buttons

   • For choosing AC, DC, range, hold, max/min

4. Safety Fuse

   • Protects meter during overload

5. Hall-Effect Sensor

   • Detects magnetic field generated by current

6. Battery Compartment

   • Usually 9V or AA cells

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✔ Specifications (Typical)

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✔ Features

• Auto-range & manual range modes

• Backlit display for low-light environments

• Data hold function

• Max/Min recording

• Auto power-off

• High safety category (CAT III / CAT IV)

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✔ Applications

Used in:

• Magnetic Particle Testing (MPI) machines

• Yoke testing for checking current output

• Electrical maintenance & troubleshooting

• Industrial control panels

• Generator, transformer, motor testing

• Automotive electrical diagnostics

• Field service work

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✔ Advantages

• Measures AC and DC with one instrument

• High accuracy

• Safe to use (no need to disconnect circuit for clamp type)

• Easy to read digital display

• Portable and rugged

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✔ Safety Precautions

• Always select correct range (AC/DC)

• Do not exceed rated current

• Avoid measuring on wet or damp equipment

• Keep fingers behind safety guard while clamping

• Inspect test leads for damage

• Use properly calibrated meter

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If you want, I can also provide:

📌 ALT image description of Digital AC/DC Ammeter
📌 Short description (for catalog)
📌 Specifications sheet
📌 Difference between Digital Ammeter and Analog Ammeter

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