- Central computer with CPU.
- Keyboard with display and analogue indicator.
- Preamplifier - measurement computer.
The CPU processes the signals from the sensors.
The computer controls the measuring procedures in accordance with the pre-programmed measuring modes. The computer is controlled either with the key board or (in the SFT) with keys on the cars steering wheel.
Complete measuring operation can thus be run without the need for the operator to take hands from the steering wheel. The keyboard is normally attached to the dashboard but can be connected direct at the measuring system at the rear of the car or at the trailer.