适合于严酷条件下的长期配置
概览
CS456压力变换器用于测量水位，适合于沟渠、水井、水塘、海湾、湖泊、溪流、水箱等环境。钛金属外壳可以让CS456浸入咸水和其它严酷的环境中。CS456同时测量压力和温度，输出方式即可以是SDI-12，也可以是RS-232，可以被我们大多数的数据采集器所读取。
CS456替换了CS455变换器。新变换器的通水口与隔膜之间的空档距离更小，在安装时必须排空其中聚集的空气。空档中聚集的空气会使得测量结果漂移，因为空气会慢慢溶解到水中。
优势与特点
- Rugged titanium case protecting the piezoresistive sensor and allowing it to be used in saltwater and other harsh environments
- Quality construction to ensure product reliability
- Fully temperature-compensated
- Low-power sleep state between measurements to reduce power consumption
- Optional weighted nose cone to facilitate submersion
- Compatible with most Campbell Scientific data loggers
- Optional NPT nose cone to enable usage in closed-pipe applications
- Quick shipment after receipt of order (ARO)
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技术说明
CS456的钛金属外壳里含有一个压阻传感器和一个温度传感器，配有结实的Hytrel线缆，即使在严酷条件下也非常柔韧。线缆内合并了一个通风管，用于补偿大气压的波动。通风管的末端连接干燥管，阻止了水汽进入变换器的内腔中。
CS456有几个压力量程选项和两个精度选项（参阅订货信息）。标准精度选项提供了 0° to 60°C温度范围内的 ±0.1% FS TEB，并包括校准认证。TEB为由补偿温度范围内的非线性、滞后性和热效应的组合误差，每ISA S51.1。请注意高精度选项不适用于 0 到 2.9 psig 量程。
Campbell Scientific提供A150干燥箱，让CS456可以连接到一个预接线的机箱（参阅订货信息）。
产品规格
| Measurement Time | < 1.5 s |
| Output Options | SDI-12 (version 1.3) 1200 bps; RS-232 9600 bps |
| Water-Level Resolution | 0.0035% FS |
| Worst-Case Temperature Resolution | 0.006°C |
| Dry Storage Temperature Range |
-10° to +80°C WARNING: Sensor could be damaged if encased in frozen ice. |
| Operating Temperature Range |
0° to 60°C WARNING: Sensor could be damaged if encased in frozen ice. |
| Temperature Accuracy | ±0.2°C |
| Overpressure | 2 x pressure range |
| Power Requirements | 6 to 18 Vdc |
| Cable Type | Hytrel Jacket, five conductor, 26 AWG |
| NPT Fitting | 1/4-in. NPS |
| Top Cone Material | Delrin |
| Body Material | Titanium |
| Element Material | Hastelloy |
| Distance |
|
| Ingress Protection | Exceeds IP68 |
| Diameter | 21.34 mm (0.84 in.) |
| Length | 213.36 mm (6.875 in.) |
| Cable Weight | 0.0421 kg/m (0.0283 lb/ft) |
| Weight | 0.10 kg (0.23 lb) without cable |
Power Consumption |
|
| Quiescent | < 50 µA |
| Measurement/Communication | 8 mA (1 s measurement) |
| Maximum | 40 mA |
Measurement Ranges at Fresh Water Depths |
|
| 0 to 2.0 m (6.7 ft) |
|
| 0 to 5.1 m (16.7 ft) |
|
| 0 to 10.2 m (33.4 ft) |
|
| 0 to 20.4 m (67 ft) |
|
| 0 to 50.9 m (167 ft) |
|
| 0 to 102 m (334.5 ft) |
|
Accuracy |
|
| -NOTE- | Includes the combined errors due to nonlinearity, hysteresis, nonrepeatability, and thermal effects over the compensated temperature range, per ISA S51.1. |
| Standard Accuracy Option | ±0.1% full-scale-range TEB |
| High Accuracy Option |
±0.05% full-scale-range TEB The high accuracy (±0.05% full-scale range) option is not available for the 0 to 2.9 psig range option. |
Maximum Cable Length |
|
| SDI-12 |
|
| RS-232 | 60 m (200 ft) |
Air Gap |
|
| Standard & Weighted Nose Cone | 0.653 cm (0.257 in.) |
| NPT Fitting | 2.72 cm (1.07 in.) |
常见问题解答
CS456: 6
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The CS45x-series pressure transducers are suitable for monitoring lake levels. However, be sure to submerge the pressure transducer below the frost line. If ice forms against the diaphragm, it will deform the diaphragm and cause permanent damage.
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No. Because of the SDI-12 protocol, the CS45x-series pressure transducers can only make measurements every 1.5 seconds.
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No. To prevent damage to the pressure transducer, it must be removed if freezing is anticipated.
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Yes, but a data logger is required. The CS45x-series pressure transducers are not autonomous. They require a data logger to initiate and retrieve a measurement. The data logger can initiate an event-based measurement.
In contrast, the CRS45x-series water-level recording sensors support event-based recording using built-in data-collection features.
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No. A data logger must be used with the CS45x-series pressure transducers.
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No. The A200 is only used to configure the CS451 and CS456 pressure transducers.