Laurel Electronics LTE: Ethernet & 4-20 mA Output Transmitter for Frequency, Rate or Period Input - 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 of Frequency / Rate Meters & Transmitters
AC Line Frequency
Laureate frequency meters and transmitters accept line voltages
up to 250 Vac and output 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
Laureate frequency meters and transmitters can sense low-level
signals from magnetic pickups or the NPN or PNP transistor
output of active sensors. These can be powered directly by the
meter or transmitter. Output in RPM or units of speed is
achieved by mathematical scaling.
Flow Rate and Simultaneous Total
Laureate frequency meters and transmitters are compatible with
all flow meters which generate pulses at a frequency propor-
tional 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.
Combining Two Rates
Extended Laureate frequency meters and transmitters offer
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
Extended Laureate frequency meters and transmitters can
linearize the output turbine flow meters, which tend to be
nonlinear on the low end. Linearizing improves their dynamic
range and accuracy.
Ordering Guide
Create a model a model number in this format: LTE60FR
Transmitter Type LTE Laureate 4-20 mA & Ethernet Transmitter
6 Standard Main Board
8 Extended Main Board Main Board
With Standard Main Board: Scalable to ±999,999 for frequency, rate, square root of
rate, up or down total, period, A-to-B time interval.
With Extended Main Board:
Above, plus rate and total simultaneously, ratio (A/B),
draw (A/B-1), other arithmetic functions (AxB, A+B, A-B), phase angle, stopwatch,
up/down counting, batching operation, linearization of nonlinear inputs.
Power 0 Isolated 85-264 Vac
1 Isolated 12-32 Vac or 10-48 Vdc
2 Power over Ethernet (PoE)
Input Type FR Dual-Channel Frequency