MIRATECH’s Differential Pressure Monitor & Data-Logging (diesel particulate filter (DPF) monitor) system provides warnings when the exhaust-gas back pressure in exhaust systems reaches excessively high levels, as can happen when a filter becomes clogged with diesel soot. If the monitoring system detects back pressure levels which are too high or severe damage to the filter, it first of all provides a visual alarm for the user by means of illuminated display lamps, and then generates a further audible alarm.
In addition, the DYNTEST System measures the temperature of exhaust gases before they reach the filter and measures the speed (in rpm) of the engine.
If desired, actual pressure, temperature or rpm values can be shown on the display at random. The pressure, temperature, and engine speed values 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 tone is acknowledged.
Pressure is measured in the range between 0 and 600 mbar. Temperatures in the range between 50 °C and 1,050 °C can be displayed.
The operator can ascertain by means of the temperature display whether the exhaust-system temperature is within the optimum range for the filter. If a back-pressure alarm is generated, the operator can raise the temperature of the exhaust gas by increasing the engine load and thus causing the filter to clean itself. The exhaust-gas back pressure will then be reduced, and the warning light will be extinguished. Only the temperature value of the first temperature sensor (T1) is important for alarm functions. If a second temperature sensor (T2) is installed, this sensor is destined only for additional observation purposes.
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