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| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | Yes |
概览
CWS900可以让带有特殊接头的传感器使用在无线传感器网络中；对于很多类型的传感器，特殊接头可作为选项订购（见兼容性表）。
CWS900含有内置的900-MHz射频电台，将数据传送到CWB100无线基站工，或者另一个无线传感器。CWS900的内置电台通常用在美国和加拿大。
优势与特点
- 允许更多类型的传感器用在无线传感器网络中
- 内部跳频的射频电台提供了更长的通讯距离和更少的干扰
- 由电池供电
- 可靠的低维护性的低功耗的测量实施方案，可用在接线传感器不适用，或者不期望使用接线传感器的应用中
- 传输可路由经过多达3个别的无线传感器
图像
技术说明
CWS900含有密封的接头，可连接雨量筒、风速风向传感器、温度/相对温度探头或者另外一种低功耗的传感器。CWS900测量模拟电压、低压AC脉冲和脉冲计数，还可以为需要供电的传感器或电阻桥测量提供激发电压。传感器实施的测量类型通过使用无线传感器规划程序、网络规划程序或设备配置实用软件来设置。CWS900与PC的连接及配置通过A205接口来实现。
CWS900可以路由自己的传输路径，通过最多另外三个无线传感器。数据采集连接到CWB100基站，处理和存储数据。
CWS900由电池供电，即可以是碱性电池组，也可以是可充电电池加上太阳能板的组合。
为什么选择无线方式？
在那些使用有线传感器会产生一些问题的站点，继续使用有线方式会有一些问题。首先，为了保护线缆，需要穿管、挖沟，既费时又费力，有些时候甚至没有可能性。当地的防火规范可能会禁止建筑内部使用某些类型的线缆。在某些应用中，测量需要通过较长距离实现，而较长的线缆可能会降低测量质量，或者成本太高。还有些时候，增加测量的数目非常重要，而数据采集器又没有留有足够的通道用于接入额外的传感器线缆。
| 注意：内部电台的设计并不是迅速转移数据。当转移数据时，从一个无线传感器开始，通过作为转发器使用的某个传感器，到基站电台结束，每个心跳包需要花15至30秒的时间。如果这个过程中，使用了3个转发器，则需要耗时45至90秒。 |
产品规格
| Weather Resistance | IP67 rating for sensor and battery pack (Battery pack must be properly installed. Each sensor is leak tested.) |
| 操作温度范围 | -25° to +50°C |
| Power Source | 2 AA batteries with a battery life of 1 year assuming sensor samples taken every 10 minutes. (Optional solar charging available.) |
| Average Current Drain | 300 μA (with 15-minute polling and depending on attached sensor) |
| Analog Channels |
|
| Analog Input Range | -1 to +2.5 Vdc |
| Resolution | 0.3 μV |
| Excitation Voltage | 2.5 V, 3.3 V, 5.0 V (20 mA maximum) |
| Excitation Voltage Accuracy | ±2% (-35° to +70°C) |
| Low-Level AC Input | 20 mV minimum (10 kHz maximum frequency) |
| Temperature Accuracy | ±0.2ºC |
| Analog Measurement Accuracy |
|
| Bridge Measurement Accuracy (+2.5 V excitation only) |
|
| Dimensions | 15 x 6 x 4.5 cm (5.9 x 2.4 x 1.77 in.) |
| Weight | 184 g (6.5 oz) |
Switch Closure |
|
| Maximum Count Rate | 100 Hz |
| Minimum Open Time | 5 ms |
| Minimum Closed Time | 5 ms |
| Maximum Bounce Time | 4 ms |
| Maximum Number of Counts | Records 1,000,000 counts before it rolls over. |
Internal 25 mW FHSS Radio |
|
| Frequency | 902 to 918 MHz |
| Where Used | US and Canada |
| FHSS Channel | 50 |
| Transmitter Power Output | 25 mW (+14 dBm) |
| Receiver Sensitivity | -110 dBm (0.1% frame error rate) |
| Standby Typical Current Drain | 3 μA |
| Receive Typical Current Drain | 18 mA (full run) |
| Transmit Typical Current Drain | 45 mA |
| Average Operating Current | 15 μA (with 1-second access time) |
| Quality of Service Management | RSSI |
| Additional Features | GFSK modulation, data interleaving, forward error correction, data scrambling, RSSI reporting |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | ||
| CR3000 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) |
传感器
| Product | Compatible | Note |
|---|---|---|
| 014A-L | ||
| 03002-L | With -CWS option | |
| 034B-L | With -CWS option | |
| 05103-45-L (retired) | With -CWS option | |
| 05103-L | With -CWS option | |
| 05106-L (retired) | With -CWS option | |
| 05305-L | With -CWS option | |
| 107 | ||
| 108 | ||
| 109 | With -CWS option | |
| 109SS-L | With -CWS option | |
| 110PV-L (retired) | With -CWS option | |
| 27106T-L | ||
| 43347-L | ||
| 52202-L | ||
| CMP11-L (retired) | With -CWS option | |
| CMP21-L | ||
| CMP6-L (retired) | With -CWS option | |
| CS215-L (retired) | ||
| CS300-L (retired) | With -CWS option | |
| CS511-L | With -CWS option | |
| CS526-L (retired) | ||
| CS547A-L | ||
| CS700H-L | ||
| CS700-L | ||
| CSAT3 (retired) | ||
| CSIM11-L | ||
| CSIM11-ORP-L | ||
| HC2S3-L (retired) | With -CWS option | |
| HMP155A-L | ||
| HMP60-L | With -CWS option | |
| LI190SB-L (retired) | With -CWS option | |
| LI200S-L (retired) | With -CWS option | |
| LI200X-L (retired) | ||
| OBS500 (retired) | ||
| TB4-L | With -CWS option | |
| TB4MM-L | With -CWS option | |
| TE525-L | With -CWS option | |
| TE525MM-L | With -CWS option | |
| TE525WS-L | With -CWS option | |
| WINDSONIC-L (retired) |
Additional Compatibility Information
Data Logger Considerations
Compatible Data Logger Operating Systems
- CR800-Series: CR800.Std.21 and higher
- CR1000: CR1000.Std.21 and higher
- CR3000: CR3000.Std.21 and higher
- CR6: Version 4.0 and higher
Sensors
One sensor can be connected to the CWS900. Sensors with the -CWS option will include a connector that mates with the CWS900. Alternatively, a sensor can connect with the CWS900 via the A150 Desiccant Case.
A150 Desiccated Case
The A150 Desiccated Case has a -CWS cable termination option. It allows our CS451 and CS456 pressure transducers or other sensors that have a vented cable to be connected to the CWS900. Sensors that measure analog voltages, frequency, and pulse can also use the A150 to connect with the CWS900.
下载
Wireless Sensor Planner v.1.7 (30.5 MB) 08-08-2013
The Wireless Sensor Planner is a tool for use with Campbell Scientific wireless sensors. It assists in designing and configuring wireless sensor networks.
常见问题解答
CWS900: 5
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Yes. For more information, refer to the Wireless Sensor Network Instruction Manual.
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CWS900-series interfaces are not designed for use inside enclosures.
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Because the devices and the radios use the same frequency bands, there will be interference. Factors affecting the amount of interference include the distances between the communications radio and the CWS radios, and the distances between the CWS base and the sensors. Also, the amount of interference is affected by whether the communications radio is set up as a master.
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To incorporate a sensor that is compatible with wireless sensor interfaces into a wireless network, a CWS900-series wireless sensor interface is needed, as well as an A205 CWS-to-PC interface to configure it.