The 6048 is a four-channel input module for use with tachometers, flowmeters and other transducers that have frequency outputs. It can also measure the period between events and count or totalize events. Digital measurement of frequency provides the highest accuracy. Much better, for example, than-voltage-to frequency converters.
The 6048 has optic isolated trigger, pause and reset inputs and may be triggered by input waveforms from 100mV to 100 Volts at zero crossings. It can measure frequency to 500 kHz, period down to 100 uS and count events to over 4 billion.
The 6048 has numerous programmable operating modes available, which include frequency measurement, period measurement, and pulse counting. Other programmable features incorporated in the Model 6048 are time base, number of measurement periods, and counter reset mode. The frequency, period, and pulse count measurements can be from either optic isolated digital inputs or a zero crossing detector. The counters can be reset by external inputs or automatically after each reading. Power is provided for transducers requiring 12V or for using the optic isolated inputs with external contacts.
Using digital measurement techniques, the 6048 does not have analog outputs. An analog voltage proportional to frequency can be obtained by using the 6042 DSP to scale the 6048 measurement and convert it to analog using digital-to-analog converters. This provides the accuracy of a digital measurement with the analog output of a frequency to voltage converter.