To add a probe for a fault while constructing an experiment, once you add a fault to the experiment you'll be prompted to configure it. You can simply switch to the Probes tab to access the list of probes for the fault. By default, most of the experiments will have a default target application health check.
Select Deploy new Probe to add a new probe. Next, you will need to specify the name, type, and mode of the probe.Select Continue. Then specify the probe properties. Select Continue. Finally, specify the probe specific details and select Setup the Probe to add the probe.