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The Laureate
dual-channel digital tachometer is a readout / controller which can measure 1000 Hz
signals with 0.01 Hz resolution at up to 25 readings per second or AC line
frequency to 50.0000 or 60.0000 Hz with 0.0001 Hz resolution in a few line
cycles. Such fast tachometer response is ideal for alarm and control
applications
The Laureate digital tachometer can display frequency from
0.005 Hz to 1 MHz, RPM in revolutions per second, rate in engineering units, and period (inverse of
frequency). The normal displayed value can range up to 999,999 counts. Each
tachometer channel (A or B) may be independently scaled for RPM, frequency, rate or period. The displayed
tachometer channel is selected via a front panel pushbutton.
The Laureate digital tachometer determines frequency by
timing an integral number of periods over a specified gate time, and then
taking the inverse of period. RPM or rate is obtained by multiplying the input by a
programmable scale factor. The inverse period approach allows greater
accuracy and faster update times than conventional tachometer which count signal
pulses over a specified time interval.
An Extended
digital tachometer
version provides capabilities beyond those of the standard tachometer:
- Rate and total simultaneously.
- Linearization of nonlinear inputs.
- Arithmetic functions. The
Extended tachometer makes arithmetic functions available for
tachometer channels A and B, namely A+B, A-B, AxB, A/B and A/B-1
(draw). For example, A+B allows two speeds to be summed. AxB allows horsepower to be displayed based measured torque and RPM, or
based on force and velocity. A/B-1 (draw) is used to compare RPM rates for stretching or tensioning.
For specifications and
additional operating modes of the Laurel digital tachometer / frequency counter, please see:
Exceptional flexibility
is achieved for the Laureate digital tachometer by programmable
features and up to 5 plug-in boards in addition to the main board. Please
see our Laureate product line overview.
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