TB4MM 高端翻斗式雨量计,采用公制单位,20.3-cm 集雨口,可测量0.2-mm的降雨增量。TB4MM特别适合高强度降雨的地区或站点使用。兼容Campbell Scientific 所有的数据采集器,广泛应用于环境监测、水文等领域。
The TB4MM funnels precipitation into a bucket mechanism that tips when filled to its calibrated level. Each tip is marked by a dual reed switch closure that is recorded by a datalogger pulse count channel. After measurement, the water drains through two orifices (accepts 12 mm tubing) in the base, allowing the measured water to be collected in a separate container.
The TB4MM contains an internal siphon mechanism that causes rain to flow at a steady rate to the tipping bucket mechanism (regardless of intensity). The siphon allows the sensor to make accurate measurements over a range of 0 to 50 cm per hour.
Sensor Type | Tipping bucket with siphon and dual reed switch |
Rainfall per Tip | 0.2 mm (0.008 in.) |
Measurement Range | 0 to 700 mm/h (0 to 27.6 in./h) |
Measurement Uncertainty |
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Measurement Uncertainty | 700 mm/h (27.6 in./h) maximum rate per hour |
Operating Temperature Range | 0° to 70°C |
Humidity Range | 0 to 100% |
Cable Type | Two-conductor shielded |
Drain Tube Size | Both filters accept 12 mm (0.47 in.) ID tubing. |
Orifice Diameter | 20 cm (7.9 in.) |
Height | 33 cm (13 in.) |
Weight | 2 kg (4.4 lb) with 7.62 m (25 ft) signal cable |
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Product | Compatible | Note |
---|---|---|
CR1000X (retired) | ||
CR3000 (retired) | ||
CR310 | ||
CR350 | ||
CR6 | ||
CR800 (retired) | ||
CR850 (retired) |
The base of the gage is supported by three legs. A CM240 Leveling Base and Mount or a user-supplied baseplate with leveling capability is recommended. The CM240 may be attached to a CM300-series mounting pole, or to a user-supplied 1.5 IPS (1.9-inch outer diameter, unthreaded) pipe (see Ordering Information). A concrete pad is recommended.
Campbell Scientific offers the 260-953 Wind Screen to help minimize the affect of wind on the rain measurements. This wind screen consists of 32 leaves that hang freely and swing as the wind moves past them.
CR200(X) Series | CR800/ CR850 |
CR1000 | CR3000 | CR9000X | CR6 Series | CR300 Series | CR1000X |
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CR500 | CR510 | CR10 | CR10X | 21X | CR23X | CR9000 | CR5000 | CR7X |
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TB4MM-L: 11
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The following are some suggestions to try:
If data is not being logged correctly, there are two likely causes:
Not registering any tips, missing tips, or double tips.
Not enough tips or too many tips.
The most common errors are either that the rain gage appears to have drifted out of calibration or that the tips are not being correctly recorded by the data logger.
When a rain gage is out of calibration, it is usually because of the buildup of dirt and grime on the internal surfaces of the tipping bucket mechanism. Cleaning the internal surfaces usually brings the rain gage back into calibration. It is also possible that a rain gage is out of calibration because it is no longer level.
To minimize the possible occurrence of calibration errors, perform routine cleaning and maintenance of the rain gage at least once every three months. The environmental conditions at a particular site may require a facility to perform cleaning, leveling, and maintenance on a much more frequent schedule.
The 260-953 Alter-type rain gage wind screen consists of 32 heavy metal leaves that hang freely and swing as the wind moves past them. The swinging leaves act as a wind damper and help minimize the effect of wind on the rain measurements without adding additional turbulence.
大多数 Campbell Scientific 传感器的型号中都带有 –L,它表示用户指定线缆长度。如果传感器型号名称列有 –LX (这里 “X” 是其它的某个字符), 那么该传感器需要用户指定长度,但线缆尾端会配有用于某个独特系统的特殊快速接头:
如果一个传感器的主型号数字的后面没有被指定 –L 或其它的 –LX 字符,那么该传感器将具有固定的线缆长度。在产品页面订购栏中 (Ordering tab) 的描述字段的末尾,会列出线缆的长度。例如 034B-ET 型号的描述字段含有信息:Met One风传感器适用于ET气象站,67英寸线缆 (Met One Wind Set for ET Station, 67 inch Cable)。产品按固定的线缆长度做尾端处理,默认是尾线方式。
如果线缆尾端配有用于某个独特系统的特殊快速接头,则型号尾部的字符会指定该传感器用于哪一个系统。例如,034B-ET 型号表明该传感器是一个 034B 且用于 ET107 系统。
不是每一种传感器都有不同的线缆尾端选项。通过查找传感器产品页面的订购栏 (Ordering tab) 中的两个位置,可以检查某种特定传感器的可用的线缆尾端选项:
如果传感器以 –ET, –ETM, –LC, –LQ, 或 –QD 等版本的型号供应,那么线缆尾端选项已经反映在该传感器的产品型号中。例如,034B 以 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, 和 034B-QD 等型号供应。
所有其它的线缆尾端选项,如果可用,会列在该传感器产品页面的订购栏 (Ordering tab) 中的线缆尾端选项 (“Cable Termination Options) 区域。例如,034B-L 风速风向传感器具有 –CWS, –PT, 和 –PW 等线缆尾端选项,显示在 034B-L 产品页面的 订购栏 (Ordering tab) 位置。
注: 当更新的产品添加到我们的库存中时,一般来说,我们会在单个传感器的产品型号下面列出多种线缆尾端选项,而不是创建多个产品型号。例如,HC2S3-L 具有 –C 线缆尾端选项用于连接到 CS110,而我们并没有使用 HC2S3-LC 产品型号。