Recording-2025-02-26T16:25:33.914Z

Key Components of the Circuit

• Power Source and Circuit Analysis

  • Understanding the circuit components is essential.

  • Different circuits exist for long and short filaments to select focal spot size.

  • Importance of recognizing components regardless of their representation in diagrams.

MA Meter and Current Measurement

• Function of the MA Meter

  • Measures current entering the step-down transformer.

  • Monitors the flow of electrons from cathode to anode.

Exposure Switch

• Dead Man Type Exposure Switch

  • Required design ensures safety; it must be held down during exposure.

  • Users must press 'rotor' button before hitting the exposure button to preserve tube life.

  • On mobile equipment, a six-foot cord allows technicians to maintain distance for safety during exposures.

Timer Mechanism

• Types of Timers

  • Various timers control the exposure time for X-ray machines.

  • The timer circuit operates independently from other main circuits.

  • Types of timers discussed include:

    • Synchronous Timer: Uses a synchronous motor; accurate but not suitable for serial exposures.

    • Electronic Timer: Most common, offers high accuracy (to one millisecond).

    • MAS Timer: Automatic Exposure Control