RPS-3000PVC, RPS-4000 Ultrasonic Level Sensor
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RPS-3000PVC, RPS-4000 Features Simple Calibration Temperature Comp. Quick Disconnect Sensitivity Control Microprocessor Design Easy Installation These self-contained Ultrasonic Sensors provide level control of both liquid and bulk materials. This gives the user a viable alternative to bubblers, floats, capacitance probes, and pressure transmitters. With sensing ranges of 30 and 40 feet respectively many tanks are within reach. Their 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 microcontroller into the design of the RPS-3000PVC and RPS-4000 many of the common problems facing long range sensing applications have been overcome. Software was then written to optimize the performance characteristics of the sensors. 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 microcontroller does is temperature compensation.

The following is a brief list of features for the RPS3000PVC and RPS-4000. SIMPLE CALIBRATION: The sensing window can be adjusted by using one of three easy methods. NOTE: When the sensors are powered up and the control lines not used, they are factory preset to maximum range. HOW TO CALIBRATE 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...

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: 1Kohm = 1 foot. For example if a range of 5' to 15' is desired with an analog output of 20mA at 5', and 4mA at 15', the following resistor values should be selected: 15' = 15Kohm resistor tied to 4mA control line (Red/Blue) 5' = 5Kohm resistor tied to 20mA control line (Red/Yellow) The output will now start at 5' 20mA and decrease with distance to 15' 4mA. The...

Specifications: Operational Range: RPS-3000PVC RPS-4000 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. Power Input: 20 - 30 VDC Reverse Polarity Protected Input Current: Ambient Temperature: RPS-3000PVC: Epoxy filled PVC housing with PVC sensing face. RPS-4000: Epoxy filled PVC housing with Glass Reinforced Epoxy sensing face. Current Sourcing Analog Output 4 - 20mA Inverted & Non-Inverted Short Circuit Protected Transducer Frequency: Transmit Time: This equals the sensors maximum distance x...