Make sure that the correct transducer is selected in the Input menu before trying to connect it physically to the analyser. If the sensor does not appear in the sensor list then add it first in the sensor administration. Sensor administration
If you need to connect the transducer via an extension cable or some external electronics, then make sure that these devices does not give any conflicts with the electrical parameters or the response of interest. Long cables can be used with IEPE transducers with insignificant influence of levels and frequencies.
Use a sound vibration exciter to verify the performance of the system after the vibration sensor set is connected. Using a vibration calibrator