User manual

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2. Configure the DMM to take resistance measurements. First set the DMM measurement mode to “Resistance.”
After setting the measurement mode, next you need to set the range of the measurement; if the range is too
small, your results will be railed, but if the range is too large, your results might not have enough precision. From
the simulation results in Table 2.1, you know that the total resistance is around 175 Ω; therefore we need to set
the range to 1 kΩ. Figure 2.7 shows the DMM configuration.
Figure 2.7. Configuring DMM for Resistance Measurement, 1 kΩ Range
3. Measure the resistance by connecting the positive probe to the positive lead of resistor R1 and the negative
probe to the negative lead of resistor R10. Record your measured resistance in the field below.
a. Total Resistance (measured):_______________________
Exercise 2.2: Measuring DC Voltage
When measuring voltage, the DMM takes several measurements over a period of time and averages the results to get a
single value. This increases the accuracy of the device and averages out any noise on a signal. The VirtualBench DMM
provides up to 5½ digits of resolution.
1. Connect the positive lead of the FGEN to the positive lead of resistor R1 and the negative lead of the FGEN to
the negative lead of resistor R8 as shown in Figure 2.5.
2. The VirtualBench FGEN can output ±12 Vdc. In this exercise, use the FGEN to output a DC signal of 5.00 Vdc.
Figure 2.8 shows the FGEN with these settings configured.