SF-110. | SF-421 | |
---|---|---|
Measurement Range | -50到70 c | -50到70 c |
测量不确定性 | 0.1℃(从0到70℃),0.2℃(从-25到0 c),0.4(从-50到-25 c) | 0.1℃(从0到70℃),0.2℃(从-25到0 c),0.4(从-50到-25 c) |
测量可重复性 | 小于0.05 c | 小于0.05 c |
长期漂移(非稳定性) | 每年少于0.02℃(在年平均温度小于30℃的非冷凝环境中使用时,连续高温或连续潮湿环境增加漂移率) | 每年少于0.02℃(在年平均温度小于30℃的非冷凝环境中使用时,连续高温或连续潮湿环境增加漂移率) |
平衡时间 | 10 S. | 10 S. |
Self-heating | 小于0.01 c(典型,假设脉冲激发2.5 V DC),5℃为0.08℃(最大,假设连续输入激励为2.5 V DC) | 小于0.01 c |
操作环境 | -50到70 c; 0 to 100 % relative humidity | -50到70 c; 0 to 100 % relative humidity |
输入电压要求 | 2.5 V DC excitation | 5.5 to 24 V DC |
输出电压范围 | 0至2.5 V DC(假设输入励磁为2.5 V DC) | - |
当前的画 | 0.1 mA DC (per thermistor) at 70 C (maximum, assuming continuous input excitation of 2.5 V DC) | 0.6 mA(静止),1.3 ma(活跃) |
方面 | 570毫米长,21毫米管道直径,70毫米圆盘直径 | 570毫米长,21毫米管道直径,70毫米圆盘直径 |
大量的 | 400克 | 400克 |
冰系伤害植物对c可以有很大影响rop yield and quality. Protection of crops during frost events is dependent on the accuracy of plant temperature predictions. Often, air temperature is not a reliable predictor of timing, duration, and severity of frost events because plant canopy temperatures can be significantly different than air temperature under certain environmental conditions.
On clear, calm nights, plant leaf and flower bud temperatures can drop below freezing even if air temperature remains above 0 C (see figure on following page). This is called a radiation frost and is due to the lack of air mixing (wind) near the surface, and a negative net longwave radiation balance at the surface (more longwave radiation is being emitted from the surface than what the surface is absorbing from the clear sky). Under cloudy and/or windy conditions, radiation frost events do not occur.
apogee.Instruments Leaf and Bud Temperature Sensors are designed to approximate plant leaf and flower bud temperatures for prediction of frost events. Radiation frost detectors are intended for applications in cropped fields and orchards when air temperatures will be near freezing, and where air temperature measurements are not a good predictor of frost formation.
bob体育竞技Apogee仪器叶子和芽温度传感器由两个精密热敏电阻组成,一个与模拟叶子和另一个模拟芽组合在一个壳体中。叶片传感器设计成模仿植物叶,芽传感器设计用于模拟花蕾。叶子和芽温度传感器为叶子和芽温度提供近似的近似,可用于预测叶子和芽上的霜。探测器是防风雨的,设计用于在相同的环境条件下进行连续温度测量,植物暴露于。
裁剪领域,果园和葡萄园的叶子和芽温估计。然后,探测器返回的叶子和芽温度可以用于提醒种植者对作物霜冻损伤的潜力。
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程序在.cr1x格式中,可以下载与Campbell Scientific DataLogger一起使用。右键单击,然后在浏览器中选择“保存目标为...”或等效命令。还可以使用WordPad或其他文本查看器查看它们。
笔记:In 2020 the CR1000 Campbell Scientific datalogger was discontinued.单击此处访问已停止的.cr1格式示例数据记录程序>