| The LPI digital display is an economical
solution to display monitoring and control applications.
With its large 4" tall digits it can easily be
seen at distances of up to 150 feet. By using its
menu, the LPI with one of four different signal conditioners
can be programmed to display DC voltage or current,
true RMS voltage or current, strain gauges, process
signals, one of six thermocouple types, 100 Ohm platinum
RTD’s as well as load cells. All this at the
price of displays with much less capability! Input
signals may be displayed as voltage or current or
scaled five full digits from 0 to 99,999 to read directly
in engineering units as ft-lbs, rpm, psi, etc. No
calibration equipment is required when changing ranges;
all ranges are digitally pre-calibrated at the factory.
Temperature scales (Celsius or Fahrenheit) are selectable
from the front panel.
The LPI makes 60 readings per second (50 for 50
Hz operation) for fast control response, true peak
reading capability, and an analog output that accurately
tracks the signal input. The meter has an adaptive
digital filter that can automatically select the
best time constant for minimum noise but yet responds
rapidly to an actual change in signal level. The
peak value of the input signal can be displayed
by a push of a button on the front panel. Auto tare
allows the meter display to be set to zero for any
input signal level.
The LPI provides an isolated 5, 10 or 24 Vdc output
to power strain gauges and transmitters, eliminating
the need for an external supply.
The display has two alarm indicators with the setpoints
programmed by front panel pushbuttons. Transistors
or dual 10 amp relays may be added to provide control
outputs. The outputs can be set to operate above
or below the setpoint and in a latched or nonlatching
mode. Time delays of the outputs are digitally selectable.
0 to 10V or 0 to 20mA (4-20mA) analog outputs are
available to drive chart recorders, remote displays
or for transmission to a central control room. The
outputs are scaled through the front panel push
buttons.
Adding RS-232 or RS-485 enables the meter to communicate
with PLC’s or computers. Baud rates can be
set from 300 to 19,200. Software provided with these
options makes meter setup even easier.
With RS-232 or RS-485 Serial Communications installed,
the LPI may be used as a Remote Display.
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