Laurel Electronics Laureate Frequency, Rate & Period Meter - Manual (Page 4)

LAUREL ELECTRONICS INC., 3183-G Airway Ave., Costa Mesa, CA 92626, USA • Tel 714-434-6131 • www.laurels.com 4
Application Examples
AC Line Frequency
The Laureate will accept line voltages up to 250 Vac and
display line frequency to 6-digit accuracy (50.0000 or
60.0000) in a few line cycles. Fast low frequency response
is achieved by timing the period and taking its inverse.
RPM and Speed
The Laureate can sense the low-level signals from
magnetic pickups or the NPN or PNP transistor output of
active sensors. These can be powered directly by the
meter. Display in RPM or units of speed is achieved by
mathematically scaling the meter.
Flow Rate and Simultaneous Total
The Laureate is compatible with all flow meters which
generate pulses at a frequency proportional to flow rate.
The Extended version can display scaled rate or total for
the same input at the push of a button, and alarm from both
the rate and total. The Extended version can also linearize
flow transducers so as to extend their dynamic range.
AC Line Frequency
The Extended Laureate offers A+B, A-B and A/B arithmetic
functions. A+B allows two input flows to be summed for
total flow, while A-B allows outflow to be subtracted from
inflow for net flow. Flow ratios aid in the proper mixing of
ingredients
Custom Curve Linearization
The Extended Laureate can linearize the output turbine flow
meters, which tend to be nonlinear on the low end.
Linearizing improves the dynamic range and accuracy of
turbine flow meters.
System-level Capabilities
The Laureate dual channel rate meter can
independently scale, display and alarm two
pulse input channels. All signal or alarm
data can further be transmitted via RS-232
or RS-485, including peak readings and
arithmetic combinations of the two rates.
The displayed rates can also be transmitted
as an isolated 4-20 mA or 0-10V analog
output.