Load Cell Controller / Versatile Process Indicator
Model: VPI
DESCRIPTION
The VPI is a low cost
solution to a wide range of monitoring and
control applications. By simple front panel
push button setup, one meter with a universal
signal conditioner can be programmed to
display DC or AC voltage or current, any of 6
popular thermocouples types, 100 Ohm platinum
RTD's, strain gauges and process signals. All
at the price of a single function meter!
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
such 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 VPI 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 VPI provides an isolated 10Vdc or 24 Vdc
output to power strain gauges and
transmitters, eliminating the need for an
external supply.
The meter has two alarm indicators with the
set points 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 set point and in a latched or non-latching
mode. Time delays of the outputs are digitally
selectable.
0 to 10V or 0 to 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. Three state, parallel BCD outputs
are also available.
Isolated
10 or 24 Vdc output
Provides transmitter excitation
Easy setup
Peak hold
and auto tare
Toll Free
Technical Support
Automatic,
adaptive digital filter
Worldwide
Input power:
85 to 264 VAC and 90 to 370 Vdc
Scalable to
5 digits
Engineering units to ±99,999
Universal
at dedicated meter prices:
DC and AC Volts and Amps, Strain (Load cells),
Process, RTD’s, Thermocouples
60
conversions per second for:
Fast control response True peak reading Analog outputs
that track the Input
OPTIONS
Dual
set point Controller
10 Amp, 260 Vac relays or
Isolated transistor outputs
Isolated
digital communications
RS-232 for interface and meter setup
RS-485 to Interface with multiple meters
Baud rates from 300 to 19,200
Parallel BCD output
Isolated
linearized analog outputs
0 to 10 Vdc or 0 to 20 mA
Isolated
low voltage power supply
9 to 37 Vdc and 5 to 28 VAC inputs
Isolated 10 or 24 Vdc output
