Meters and troubleshootingQuestion 731 of 1506

Which pair of analog signal standards has a live zero?

0 to 12 PSI and 0 to 5 V
0 to 10 V and 0 to 20 mA
3-15 PSI and 4-20 mA
0 to 10 V and 0 to 12 PSI

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Correct answer: 3-15 PSI and 4-20 mA

The more robust standards use a non-zero value for 0 percent.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 9.1: Analog and Digital Signals

Questions last reviewed: 18 October 2026

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