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Step 5:
Auto Zero.
Auto-zeroing results in more accurate test results, but requires more test time. With auto zero enabled, the
multimeter internal offset is measured each time the input signal is measured. Then subtract the offset from the
previous reading. This avoids the effect of the offset voltage on the input circuit of the digital multimeter on the
measurement accuracy. In the case of auto-zeroing, the digital multimeter measures the offset once and subtracts
the offset from all subsequent measured parameters. The DMM makes a new offset measurement each time you
change the function, range, or integration time.
The red mark is indicating the auto-zero is ON. If the OFF state is required, it will change from ON to OFF as
long as the corresponding button is pressed. The default state is ON.
Step 6:
Input Z internal resistance selection
Select the data input impedance. The input impedance can be automatic or 10MΩ. Automatic mode selects high
impedance (HighZ), which is appropriate for 100mV, 1V, 10V range. The internal resistance of the 100V and
1000V ranges is fixed at 10MΩ.
3.2.2 DCV Ratio
Step 1:
Properly connect the input terminals.
Step 2:
Turn on the DCV Ratio function to compare the two voltages.
3.2.3 AC Voltage
This section describes how to configure the measurement of the AC voltage.
This DMM select the default delay to give the correct first reading for most measurements. In order to get the
