Why is it essential to maintain electrical test equipment calibration and verification before use?

• A. To ensure accurate readings, prevent misdiagnosis of hazards, and protect workers from shock risks.
• B. To increase device weight.
• C. To reduce battery consumption.
• D. To improve color accuracy of the display.

Answer: (A)

Maintaining calibration and verification before using electrical test equipment ensures readings are accurate. Instruments can drift over time due to age, temperature, or use, and without calibration you might misread voltages, insulation integrity, or continuity. That can lead to misidentifying hazards or missing dangerous conditions, which increases the risk of electric shock to workers and other safety problems. Verifying the instrument before each use confirms it still meets required tolerances, so you’re relying on trustworthy data for safe, effective work. This isn’t about device weight, battery life, or display color—the importance lies in measurement accuracy and safety.