In a clip apparatus with a drive and a control, on the holder of one of the clip closing work tools a force measuring device is provided. Based on an alert ruleset, an alert management module may determine whether to provide notification of the alert. The control signal input node receives a coil control signal from an ignition control system. A computer in one or both of the tester units stores the measured scattering parameters and uses the scattering parameters to move the reference plane to any desired location along the patch cord.