B+K precision 5490C Series, User Manual

Page: 30 / 57

22
longer the integration time, the higher the accuracy but the slower the measurement. PLC (power-line
cycle). 1PLC, 10PLC, 100PLC can inhibit the power supply noise. Selecting 100PLC can provide the best
noise rejection, but at a slower rate.
Step 5: Auto Zero.
Auto-zeroing results in more accurate measurements but requires more test time. With auto zero
enabled, the digital multimeter measures the offset once and subtracts the offset from all
subsequently measured parameters. This avoids the effect of the offset voltage on the input circuit of
the digital multimeter on the measurement accuracy. The DMM makes a new offset measurement
each time you change the function, range, or integration time. The default state is ON.
3.3.7 Resistance 4W (4-wire)
Step 1: Configure the test leads as follows:
Step 2: Press then press on the front panel to enter the four-wire resistance test
interface.