The Differential Voltage Probe measures the potential difference between the V+ clip (red) and the V– clip (black). The voltage probes have differential inputs. The voltage measured is with respect to the black clip and not circuit ground. This
allows you to measure directly across circuit elements without the constraints of common grounding. The voltage probes can be used to measure negative potentials, as well as positive potentials. The output of this system is linear with respect to the measurement it is making. A built-in amplifier allows you to measure positive and negative voltages on any of our interfaces. Since many lab interfaces can read voltages only in the range of 0 to 5 volts, the amplifier offsets and amplifies the incoming signal so that the output is always in the range of 0 to 5 volts. If an input is zero volts, for example, the amplifier will produce an output of 2.5