TCAV-L Sonda termopar média para solo

Visão Geral

TCAV-L tipicamente fornece a temperatura média dos 6 a 8 centímetros superiores do solo, para balanço de energia em sistemas de fluxo. Agrupa quatro termopares paralelos num único cabo 24-AWG. Cada membro de um termopar pode então ser enterrado a uma profundidade diferente. Os dois pares são separados a distância de até 1 m.

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Benefícios e Características

  • Utilizado em conjunto com os pratos de fluxo de aquecimento do solo e sondas de umidade do solo para computar o fluxo total do aquecimento do solo

The "-L" on a product model indicates that the cable length is specified at the time of order.

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Descrição Técnica

The TCAV uses type E thermocouples, which are comprised of a chromel wire and a constantan wire joined at a measurement junction. A voltage potential is generated when the measurement end of the thermocouple is at a different temperature than the reference end of the thermocouple. The magnitude of the voltage potential is related to the temperature difference. Therefore, temperature can be determined by measuring the differences in potential created at the junction of the two wires.

A reference temperature measurement is required for thermocouple measurements. The temperature sensor built into many of our data loggers' wiring panel typically provides this measurement.

Especificações

Type Chromel-Constantan
Typical Output 60 μV/°C
Accuracy Refer to the Thermocouple Measurement section in the data logger manual.
Weight 0.45 kg (1 lb) with 15.24-m (50-ft) cable

Compatibilidade

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Dataloggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR3000
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR6 The CR6 is compatible when used with the CDM-A108 or CDM-A116.
CR800
CR850
CR9000 (retired)
CR9000X

Additional Compatibility Information

Data Logger Considerations

One differential analog input channel per probe is required.

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

Perguntas Frequentes Relacionadas

Number of FAQs related to TCAV-L: 4

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  1. Yes, as long as the TCAV-L is measured using a differential measurement instruction. Be sure to connect the shield wire to analog ground.

  2. The TCAV-L measurement range, accuracy, and resolution are a function of the data logger used to measure the TCAV-L. Refer to the appropriate data logger manual measurement section for more information.

  3. The TCAV-L is constructed using a Type E thermocouple wire. The high-order NIST polynomials were fit over the temperature range of -270° to 1000°C. The temperature range of a TCAV-L on a data logger depends on the measurement range selected in the thermocouple measurement instruction. For example, using a CR3000 and the ±20 mV input range and a reference temperature at 20°C, the TCAV-L temperature range is -270° to 300°C. Refer to the measurement section in the appropriate data logger manual for a detailed discussion on thermocouple measurements.

  4. The TCAV-L is a Type E thermocouple. Use a Type E (chromel –constantan) Thermocouple found in the Sensor | Temperature group.

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