What type of calibration is utilized with voltage switching units?

• A. External calibration
• B. Single-point calibration
• C. Continuous internal calibration
• D. Periodic calibration

Answer: (C)

Voltage switching units rely on continuous internal calibration to maintain accuracy in measurements. This type of calibration is essential because it allows for real-time adjustments to ensure that the readings reflect the true values being measured. Continuous internal calibration typically involves monitoring the system's performance continuously and making automatic adjustments as needed. This process helps in compensating for any drifts or changes in the system, thereby enhancing the reliability and accuracy of the bone densitometry measurements.

While other calibration types exist, they either do not provide the same level of real-time accuracy or are less frequent in updating the system's calibration state, making them less suitable for the demands of voltage switching units used in bone densitometry equipment.