What is the only equipment setting that can be changed in normal display mode?

• A. Units of measurement
• B. Brightness of the alphanumeric and LED displays
• C. Calibration offset
• D. Alarm threshold

Answer: (B)

In normal display mode, the only setting you can adjust is the brightness of the alphanumeric and LED displays. This change affects how easy it is to read the readout under varying lighting, without altering the actual measurements or how the device interprets data. Other settings—units of measurement, calibration offset, and alarm threshold—are tied to how the device reports and safeguards its readings. Changing units would change what the numbers mean, calibration offset would shift all readings, and alarm thresholds would modify when warnings appear. Allowing those changes during normal operation could lead to misinterpretation or unsafe conditions, so they’re kept fixed in regular mode and only adjustable in setup or calibration modes.