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概览
CS220热电偶温度传感器通过直接接触方式，来测量表面温度。通常用于监测太阳能板的表面温度，也可用于监测其它设备。CS220非常容易接入我们的数据采集器，是太阳能应用的理想选择。
优势与特点
- Well-suited for solar energy applications
- Thermocouple tolerance meets ASTM E230-ANSI MC 96.1 (reference junction at 0°C)
- Easy to install
- Compatible with most Campbell Scientific data loggers
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技术说明
CS220采用24-AWG的带屏蔽双绞线E型热电偶，在测量端把2根线焊在一起；当测量端与参考端存在温差时，会生成电压势，电压势的大小与温差大小相关，因而通过测量电压势的大小，就可以检测到测量端与参考端的温差大小。
热电偶温度测量要求知道参考温度。我们很多的数据采集器内置在接线面板中的温度探头可以作为参考温度使用。
CS220含有不锈钢编织线缆和热电偶延长线缆。编织线缆上的粘着剂将探头固定在太阳能板上。延长线缆和编织线缆的微型快速接头相互连接在一起，延长线缆的尾线连接到数据采集器。
CS220可以测量太阳能板背面的温度，其对太阳能应用很重要。太阳能板的输出效率受其温度影响，当太阳能板的温度增加时，太阳板的输出效率会下降。
备件传感器可以订购线缆长度为0英尺的CS220，可得到一根不锈钢编织线缆，但不含热电偶延长线缆。 |
产品规格
| Sensor | Type E thermocouple |
| Measurement Description | Back-of-module temperature |
| Operating Temperature Range | Up to 260°C |
| Thermocouple Type | Chromel-Constantan |
| Typical Output | 60 μV/°C |
| Thermocouple Tolerances |
Meets ASTM E230-ANSI MC 96.1 Special Limits of 1.0°C or 0.4% (0° to 900°C). Reference junction at 0°C. |
| Maximum Temperature of Adhesive | Adheres up to 260°C. |
| Accuracy | Refer to the Thermocouple Measurement section in the data logger manual. |
| Response Time | 0.15 s |
| Sensitivity | +1°C |
| Length of Stainless-Steel Braided Cable | 1.0 m (3.3 ft) |
| Thermocouple Length | 2.54 cm (1.00 in.) |
| Thermocouple Width | 1.91 cm (0.75 in.) |
| Weight | 238 g (8.4 oz) with 15.24-m (50-ft) cable |
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 |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) |
Additional Compatibility Information
Installation
The CS220 usually adheres in the center of the back panel of a solar module. Once the mounting location is determined, clean the back panel surface. Use extreme caution removing the masking paper from the measurement end of the thermocouple; damage can occur if masking paper is not removed carefully. Once masking paper is removed, firmly press thermocouple to the panel. Adhere the cable strain relief 2 to 3 in. from the end. Connect the mini connector on the stainless-steel overbraided cable to the mini connector on the thermocouple extension cable. Wire the pigtails of the thermocouple extension cable to the data logger, as determined by the data logger program/wiring table.
Multiplexers
If large numbers of CS220s need to be measured, the AM25T Thermocouple Multiplexer is recommended.
Data Logger Considerations
One differential channel per probe is required; a thermocouple reference junction at the data logger is also required.
Programming
The CS220 is measured by the TCDiff instruction in CRBasic and by Instruction 14 (Differential Thermocouple) in Edlog. The CR200(X)-series, CR500, and CR510 dataloggers do not have thermocouple measurement instructions and are therefore not compatible with the CS220.
Reference Temperature Measurement
A reference temperature measurement is required. Options for measuring the reference temperature include:
- Thermistor built into the CR800, CR850, CR1000, CR3000, or CR5000 wiring panel
- PRT built into the wiring panel of the CR9050 or
- CR9051E input module for the CR9000X Measurement and Control Datalogger
- PRT built into the wiring panel of the CR723T input card for the CR7 Measurement and Control Datalogger
- CR10XTCR thermistor that connects to the CR10X wiring panel
常见问题解答
CS220-L: 3
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Magnetic fields do affect thermocouples, but Campbell Scientific data loggers are designed for thermocouple measurements and have built-in tools to make the best measurements possible.
Some suggestions for better measurements:
- Use a thermocouple with a shield that is tied to ground on the data logger side.
- Use the TCDiff() and TCSe() instructions. In those instructions there is a 50 and 60 Hz noise filter that can be used.
- Never run thermocouple wires in the same conduit as ac voltage.
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Campbell Scientific recommends approximately 100 ohm loop resistance. This means that with a Type E thermocouple, based on 24 AWG wire, the maximum is approximately 100 feet. It is possible to exceed that distance, but it is not recommended. OMEGA provides a “Resistance vs. Wire Diameter” table that displays the resistance per double foot. See page H-8 of this PDF. Using this table, it is easy to determine how many feet can be run with any particular gauge.
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The response time is 0.15 s. The CS220-L can be used as a self-adhering thermocouple for temperatures from -40° to +260°C.