The ControlBox is the key component in the DYNTEST System. Over the course of time, diesel-particulate filters become clogged, and high levels of back-pressure build up. To prevent damage to the filter, and to the vehicle engine, effective countermeasures must be taken fast. This is precisely what the ControlBox does. It measures, logs and monitors back-pressure, exhaust-gas temperature, engine revs - and four other important parameters as well. If desired, actual pressure and temperature values can be shown on the display. The pressure and temperature are continuously written to memory. When an alarm is generated, it remains activated until the relevant values return to normal levels. The audible alarm is switched off when the alarm is acknowledged. In addition, the ControlBox can trigger active regeneration and alarm systems. Besides these safety functions, the ControlBox can also perform a wide variety of data-storage and -evaluation tasks.