蒸发 / 255-100
恶劣环境下，测量结果仍然可靠
概览
255-100 根据蒸发皿中的水位变化来测定蒸发率。蒸发计产生输出电阻可以被数据采集器检测到。255-200或其它标准的国家气象服务A级蒸发皿需单独采购。
优势与特点
- Compatible with most Campbell Scientific data loggers
- Low-power device for reading the water level of an evaporation pan such as the 255-200
图像
技术说明
255-100 包括一个浮标、滑轮和平衡装置，它们装在一个精密的1000-ohm的电位计上，通过齿轮装置安装在防水外箱里面。配有带三个水平螺母和一个水平仪的三角板。电位计产生的输出阻抗与浮标的方位成比例，现场利用数据采集器，或远程使用监测设备可检测到传感器的信号。
255-100 可直接放在蒸发皿中，或是使用255-100P/F与蒸发皿连接。 如不使用255-100P/ F，可使用1/2-英寸的polybraid（纤维加固）软管，尼龙接头（1/2-英寸，NPT X Hose Bar）和小型不锈钢喉箍，这些配件可从当地的五金商店购买。
产品规格
| Water Input Port | 1/2-in. NPT coupling, female |
| Counter Weight | 114 g (4 oz) stainless steel |
| Total Resolution | 0.76 mm (0.03 in.) |
| Potentiometer Accuracy | 0.25% |
| Rotation | 360° continuous |
| Electrical Angle | 340°, ±1° (20° gap) |
| Resistance | 1,000 ohm, ±10% |
| Operating Temperature Range |
-40° to +60°C Evaporation is normally not measured at temperatures below freezing. |
| Linearity | 0.25% |
| Mechanical Range | 0 to 254 mm (0 to 10 in.) |
| Electrical Range | 0 to 240 mm (0 to 9.44 in.) |
| Float | 10.2 cm (4 in.) diameter, plastic |
| Cable Description | 3-conductor, 24 AWG, shielded |
| Cable Length | 15 m (50 ft) |
| Diameter | 203 mm (8 in.) |
| Height | 700 mm (27.5 in.) |
| Base Dimensions | 40.6 cm (16 in.) triangle with leveling screws |
| Weight | 3.4 kg (7.5 lb) |
| Shipping Weight | 6.8 kg (15 lb) |
常见问题解答
255-100: 1
-
The Half Bridge instruction should be selected (not the 3 Wire or 4 Wire options) in Short Cut. The following parameters are data logger specific, but the following can be used on the CR1000 datalogger with the sensor wired to SE1, and Vx1:
How many HalfBr Sensors? 1 Total Bridge Resistance 1000 ohm Excitation Voltage 2500 mV Sensors per excitation channel 1 Range of sensor voltage 2500 mV Reverse Excitation Yes Measurement Integration 50 or 60Hz
Settling Time 20000 µs Multiplier Determined during installation (see manual) Offset Determined during installation (see manual)
列在
Common Accessory for the following products: