Zero channel offsets digitally removes the small offsets that are present within a measurement channel when the channel signal and ground inputs are shorted. The procedure ensures that your waveform is properly referenced to zero - that is, your waveform will read zero when the measurement at the part under test is zero.
Zero channel offsets is limited to use in situations where there is no more than +/-50 mV between the channel signal and ground inputs when they are shorted.
Removing an offset using Zero channel offsets reduces the channel’s input range by a similar amount. You must allow for offset removal when considering the available input range, otherwise you may experience unexpected over range errors.
Sometimes a small deviation of your waveform from zero can indicate a big problem. In these cases, a small discrepancy in your measurements can make a big difference to your diagnostic conclusion. Parasitic battery drain measurements are one example. By using Zero channel offsets you can remove potential errors due to offsets from these tests.
Connect a x1 test lead to the channel whose offset you want to remove and connect together the test lead’s signal and ground leads.
Open the Channel options panel and under Zero channel offsets click Zero to make the adjustment.
You can then disconnect the test lead’s signal and ground leads from each other and start using the lead to capture waveforms.
Click Clear to restore the input to its uncorrected state.