RPS-4000
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RPS-4000 Features • Simple Calibration • Non-Contact Measurement • Temperature Compensation. • Quick Disconnect • Easy Installation • Sensitivity Control • Microprocessor Design The RPS-4000 self-contained long range Ultrasonic Sensor provides level control of both liquid and bulk materials. This gives the user a viable alternative to bubblers, floats, capacitance probes, and pressure transmitters. The sensor has three methods of calibration. The momentary contact closure method, the hard wire choice table of factory set ranges, and calibrating with remote potentiometers. These calibration methods make the sensor extremely versatile. The sensor also have field adjustable sensitivity (Gain Control). This allows the operator to tune the sensor for optimum performance to meet different tank or material conditions. If set points are required in addition to the sensor's analog output, look up the Migatron SPC-701, SPC-704 and M-1000* control products. The SPC-704 can also be used as a power supply for the RPS-4000. With a 40 foot sensing range many tanks are within reach of the RPS-4000. The incorporation of a microprocessor design makes it possible to achieve signal conditioning. This gives the sensor the ability to process the return ultrasonic echo and distinguish between false targets and real targets. With the incorporation of a microprocessor into the design of the RPS-4000 many of the common problems facing long range sensing applications have been overcome. Software is written to optimize the performance characteristics of the sensor. The artificial intelligence analyzes and conditions the return ultrasonic echo. This process filters out any false echoes and electrical noise. An additional task that the microprocessor does is temperature compensation. * M-1000 can not be used as a power supply for the RPS-4000.

SIMPLE CALIBRATION: The sensing window can be adjusted by using one of three easy methods. NOTE: When the sensor is powered up and the control lines not used, it is factory preset to the maximum range. Method One (and possibly the most direct way to calibrate the sensing range) is as follows (see figure B): Step 1: Tie the Red/Yel wire (20mA control line) and the Red/ Blue wire (4mA control line) together. NON-CONTACT: The use of ultrasonic sound to measure distance means that the sensor does not need to come in contact with the target. Step 2: With the material level at the 4mA point,...

gain. However if the sensor is installed and it seems to be detecting something other then the desired target, the gain can be reduced to see if the false target disappears. Method Three calibrates the sensors by using resistors tied to the control lines (see figure D). These resistors are installed between the control lines and ground (green wire). The following resistance formula applies for distance: 1k ohm = 1 foot. For example if a range of 5 - 15' is desired with an analog output of 20mA at 5', and 4mA at 15', the following resistor values should be selected: The LED is located at the...

The angle of tilt of a flat target is plus and minus 10 degrees. The Beam Spread is approximately 20 degrees. This is equal to 4.25" per foot. Operational Range: Power Input: 20 - 30VDC Reverse Polarity Protected Input Current: Ambient Temperature: PVC housing with PVC sensing face Current Sourcing Analog Output 4 - 20mA Inverted & Non-Inverted Load 0 - 500 ohm Maximum Short Circuit Protected Transducer Frequency: Transmit Time: This equals the sensors maximum distance x 10ms. For example if the maximum programmed distance is 10' the transmit time is 100ms. GREEN GROUND RED/BLK 4 - 20mA...