B+K precision 5490C Series, User Manual

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PLC (power-line cycles). 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.
3.3.5 AC Current
Step 1: Using either the 3 A or 10 A input terminal, configure the test leads as follows:
Use the 10 A terminal for current measurements greater than 3 A.
Step 2: Press then press on the front panel to enter the ACI test interface.