Cuerpo de epoxy duradero y fácil de limpiar
Resumen
La CS547A es una sonda de calidad de agua que mide la conductividad (EC) y temperatura del agua. Se conecta al datalogger Campbell Scientific vía el interface A547. Esta sonda es compatible con la mayoría de dataloggers Campbell Scientific.
Leer másVentajas y características
- Compatible con la mayoría de dataloggers Campbell Scientific
- Fácil de limpiar
- Resistente a la corrosión
- Compatible con multiplexores AM16/32, permitiendo medir múltiples sensores
- Opción con peso para que se sumerja por si sola
Imágenes
Descripción detallada
La sonda CS547A mide la temperatura del agua con un termistor. La conductividad eléctrica (EC) se mide con tres electrodos cilíndricos de acero inoxidable dentro de una carcasa de epoxy. La configuración de los electrodos elimina problemas de lazo de tierra asociados con sensores que estan en contacto con tierra. Los electrodos incluyen acoplamiento ac, y el datalogger aplica excitación bipolar. Este proceso reduce reacciones electroquímicas, minimiza la corrosión, y amplia la vida útil de la sonda.
La CS547A es fácil de limpiar y es resistente a la corrosión. Tiene los bordes redondeados para facilitar la instalación y desinstalación. Se entrega calibrada en una disolución 0.01 molal KCl a 25°C. La solución tiene una conductividad eléctrica de 1.408 mS cm-1.
Preguntas frecuentes
Número de FAQs relacionadas con CS547A-L: 18
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Yes. Each CS547A-L is shipped with a pn 7785, 4-inch Nylon brush.
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The readings will be accurate for the sample of water inside the cavity, but that may or may not be indicative of the overall conductivity of the well. Flowing water allows a more representative measurement over time.
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The CS547A-L has a built-in thermistor that is used for this purpose.
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An analog voltage signal of no more than 2500 mVdc.
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Exciting the CS547A-L with an electrical charge to make a measurement causes ionization. The ionization correction code corrects for this disruption.
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This sensor is designed for freshwater applications and should not be used in seawater.
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The sensor should never need recalibration under normal use unless the diameter of the measurement cavity changes because of corrosion or abrasion. For more information, refer to the “Factory Calibration” and “Field Calibration” sections of the CS547A instruction manual.
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The units of conductivity are mS/cm or millisiemens per cm.
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Ice forming inside the hollow cavity can damage the sensor; therefore, as a precaution, the sensor should be removed.
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If the measurement cavity is kept clean, ephemeral conditions should not affect the reading.
Especificaciones
| Output | Analog (requires A547 interface) |
| Conductivity Measurement Range | ~0.005 to 7 mS/cm |
| Temperature Measurement Range | 0° to 50°C |
| Conductivity Accuracy |
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| Temperature Polynomial Linearization Error | Typically < 0.1°C (over 0° to 48°C) |
| Thermistor Interchangeability | Typically < 0.2°C (over 0° to 50°C) |
| Wetted Materials | Epoxy housing, 316 stainless-steel rings, polyurethane cable |
| pH Operating Range | Solution pH of less than 3.0 or greater than 9.0 may damage the stainless-steel housing. |
| Operating Temperature Range | 0° to 50°C |
| Depth Rating | 305 m (1000 ft) maximum |
| Dimensions | 8.9 x 2.54 x 1.9 cm (3.5 x 1 x 0.75 in) |
| Weight |
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| Weighted Cable Weight | 80 g (2.8 oz) |
Compatibilidad
Nota: lo siguiente muestra información de compatibilidad notable. No es una lista de todos los productos compatibles.
Dataloggers
| Producto | Compatible | Nota |
|---|---|---|
| CR1000 (retired) | ||
| CR1000X | ||
| CR300 (retired) | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR350 | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) |
Información de compatibilidad adicional
The minimum pipe ID that the CS547A-L fits is 2.79 cm (1.1 in.).
Data Logger Considerations
The A547 Interface is required for connecting the probe to the data logger. This interface contains the blocking capacitors and bridge completion resistors necessary for the conductivity measurement.
A 3-ft cable is shipped with the sensor to connect the A547 to the data logger terminals. The CS547A requires one differential analog input, one single-ended analog input, and two excitation channels. One excitation channel must be capable of delivering ac excitation, so the BDR301 or BDR320 are NOT compatible.
Using Multiple CS547A Conductivity Probes
Special considerations apply when two or more CS547A probes will be measured by a single data logger.
A CR510 cannot be used to measure two probes because it does not provide sufficient (three) excitation channels.
Although it is acceptable for the two thermistors to share an excitation channel, each conductivity measurement requires a dedicated excitation channel. If excitation for the conductivity measurement were to be shared from a common excitation channel, both solutions would become polarized and once excitation was removed, some charge could be transferred from one solution to the other making the measurements interdependent on one another. If more than two CS547A probes are to be measured, then an AM16/32-series multiplexer is required.
Multiplexers
If more than two CS547A probes are to be measured, then an AM16/32-series multiplexer is required. In this scenario, each probe is wired to the multiplexer and one A547 interface is wired between the multiplexer and the data logger. If the system were maximized, up to sixteen CS547As could be connected to the multiplexer. However, because the A547 becomes a part of the measurement circuit for all connections to the multiplexer, only CS547A probes could be connected to the multiplexer (i.e., it is not possible to mix other sensor types with the CS547As attached to the multiplexer).
Documentos
Folletos producto
Descargas
CS547a Program Examples for CR1000X and CR1000 Data Loggers v.1 (7 KB) 24-02-2022
Four programs are included: two CR1000X programs and two CR1000 programs. The first CR1000X and CR1000 programs measure the sensor and correct for cable resistance, EC ionization, and temperature. These programs use constants for KC (printed on the sensor label), cable length, and temperature coefficient (see manual). These values should be changed to fit your sensor. Also included are a CR1000X and a CR1000 program for calibrating the sensor. Newer data loggers such as the CR6 are programmed similarly to the CR1000X. Older data loggers such as the CR800-series and CR3000 are programmed similarly to the CR1000.