RPS-8000 Controller With Remote Sensing Heads0 pages

RPS-8000A, 8001A
Features
Various Sensing Ranges

Multiplexed 2 - 8 Transducers

Narrow Sensing Beam

Analog Current and Voltage

High Frequency

Isolated Form C Relay Outputs

LED Indicator

Temperature Compensation

Sealed Transducer

Small Remote Transducer

OVERVIEW
The RPS-8000A was designed for applications
where 2 or more sensors are needed in a general area.
The RPS-8000A can handle up to 8 TSR-3 transducers, and the RPS-8001A up to 8 SSR-3 transducers
(stainless steel). These transducers are multiplexed so
they can all operate in close proximity with each other
without interference. Each sensor has three outputs:
an analog voltage, analog current, and form C relay.
The Analog outputs each have a zero and span control
as well as an inverting switch if a decreasing signal
with distance is desired. There is a 25 turn pot provided for each relay output so the detect point can be
adjusted.
Another feature is the instrument's ability to compensate for temperature changes. To accomplish this
sensor "0" looks at a fixed distance and adjusts the
circuit to give a proper reading. Since all the other
channels use this same compensated circuit they, too,
become compensated for temperature, humidity, and
pressure changes. The RPS-8000A also has the ability
to be controlled from an external source. When operated in this mode the user can direct any of the 8
sensors to output "S1". This then requires the need for
only a single input. Another external control is the
RATE. This controls the rate at which the sensors will
update.
TRANSDUCERS
The RPS-8000A uses the TSR-3 transducer. This is
a sealed sensor with a galvanized steel threaded housing and a silicone rubber sensing face. The RPS-8001A
uses the SSR-3 transducer. This is a sealed sensor

with a 303 stainless steel threaded housing and a 302
stainless steel sensing face. Both types of transducers
have a narrow sensing beam.
OUTPUTS
The RPS-8000A has three different outputs per
sensor. Any one or all of the outputs may be used at
the same time. The relay output is a form C containing
a N.O. and N.C. contact. It is rated for a .5 Amp. at
120VAC. The analog voltage output is 2 - 10 volts.
It's load must be 5K or greater. The analog current
output is 4 - 20mA. It's load must be 300 ohms or
less. These analog outputs can be scaled to occur over
a variety of ranges.
ZERO & SPAN CONTROLS
The RPS-8000A comes with zero and span controls for each sensor. These two potentiometers allow
the analog signal to be adjusted over a desired range.
The adjustment ratio is 5 : 1. This means that with the
4" to 12" range the analog output can be adjusted to
give an output over a range as small as 1.6" or as
large as 8". Example: If you desire a 2v signal at 5"
and a 10v signal at 10" you would adjust the following
way: 1. Turn the span (gain) control fully cw. 2.
Adjust the zero (bias) control for 2v with a
target 5" away. 3. Place target at 10" and check

Migatron Corporation - 1997
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