measuring filter MF4FT
The measuring filter MF4FT is meant for the selective level supervision and level measurement in audio frequency ripple control facilities. The level of the start pulse is measured after a delay time of 400ms. Afterwards this level is available as a constant current or as a constant voltage at the output up to the arrival of a new ripple control telegram. The measured value is being indicated on the 16-digit LC display. The release for the next measurement can be set by the keys in a range from 6.6 to 999.999 seconds (Telegram running time).
The ripple control pulse is available at two outputs (potential free contacts) for the pulse comparison in command devices. The response level can be set between 0.1V to 9.9V or 0.1% to 9.9% Tf. During the telegram running time a potential free contact is available for survey. A measuring voltage > 50V 50/60Hz is signaled by a closed contact. An active RC-Filter of the 8th order guarantees a clear separation of the useful signal from all disturbing mains frequencies. The filter envelope is put out as a DC voltage from 0 – 10V DC.