Campbell Scientific CS451/CS456 Pressure Transducer - Manual (Page 15)

CS451/CS456 Submersible Pressure Transducer
8. Select any other sensors you have, then finish the remaining Short Cut
steps to complete the program. The remaining steps are outlined in Short
Cut Help, which is accessed by clicking on Help | Contents |
Programming Steps.
9. If LoggerNet, PC400, or PC200W is running on your PC, and the PC to
datalogger connection is active, you can click Finish in Short Cut and you
will be prompted to send the program just created to the datalogger.
10. If the sensor is connected to the datalogger, as shown in the wiring
diagram in step 6, check the output of the sensor in the datalogger support
software data display to make sure it is making reasonable measurements.
5. Overview
The CS451/CS456 pressure transducer provides a reliable, accurate
pressure/level measurement that is fully temperature compensated. Its 24 bit
A/D has simultaneous 50/60 Hz rejection and automatic calibration for each
measurement.
A number of additional advanced measurement techniques are employed to
harness the best possible performance available from today’s state-of-the-art
pressure transducer technology. The transducer reverts to a low power sleep
state between measurements. A series of measurements are performed yielding
a temperature and pressure value. This measurement cycle takes less than 1.5
second. The transducer can also be configured to output pressure only in less
than 1 second. The measurement cycle is activated using SDI-12 or RS-232
commands.
The transducer consists of a piezoresistive sensor housed in a 316L stainless-
steel (CS451) or titanium (CS456) package to enhance reliability. The rugged
construction makes the CS451/CS456 suitable for water level measurement in
irrigation applications, water wells, lakes, streams, and tanks. The titanium
package of the CS456 makes it ideal for salt water or other harsh environments.
The cable incorporates a vent tube to compensate for atmospheric pressure
fluctuations and the jacket is made of rugged Hytrel®, designed to remain
flexible and tough, even under harsh environmental conditions.
The CS451/CS456 has two communication options: SDI-12 or RS-232. The
CS451/CS456 is shipped from the factory with both communications options
enabled; there is no configuration required. As an SDI-12 sensor, the
CS451/CS456 is shipped with an address of 0.
Two values are output by the CS451/CS456 — pressure/level and temperature.
The CS451/CS456 is shipped from the factory to output pressure in psig and
temperature in degrees Celsius.
The CS451/CS456 has three nose cone options. FIGURE 5-1 shows the nose
cone options. The weighted nose cone makes the transducer easier to
submerge to depth. The 1/4 inch NPT nose cone allows the transducer to be
used in closed-pipe applications. Nose cones can be switched out later.
The –L in the transducer’s model name indicates user-specified cable length.
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