Thermocouples wiring diagrams

Wiring Diagrams of Thermocouple Installations.— Figure 11 illustrates a simple thermoelectric installation for a rare-metal couple. The couple is properly protected by a porcelain or quartz tube and if necessary by an outer tube of iron, chromel, fireclay, etc. From the head of the couple compensating lead wires are carried to the bottom of a pipe driven 10 ft. under ground. From the bottom of the pipe copper lead wires are carried to the indicator. 

Figure 6.23. High-pressure DTA system described by Williams and Wendlandt (131. l ) Schematic diagram of apparatus. A. high-pressure DTA cell B. T T Controls Company Model No. TPC-2000 temperature programmer C Du Pont Model 900 recording module D, relief valve E, valve F. pressure gauge G. gas pressure regulator H. gas cylinder, b) Schematic diagram of DTA cell. A. furnace chamber B. high-pressure connectors for furnace wires and thermocouples. C. furnace D. DTA sample and reference holders E. gas outlet tube F, Buna-N O-ring G. base plate H. Conax connector for thermocouple wires 1. gas inlet-outlet connector.

Figure 4 shows a schematic diagram of an ultrahigh vacuum (5 x 10 ° Torr) apparatus that integrates LEED, XPS, TPD, LEISS, and electrochemistiy (EC). The base pressure of the chamber is 5 x 10" Torr. The sample is mounted on a probe, a tube fabricated out of stainless steel, at the top of the chamber. The probe allows experiments to be performed at very low temperatures for example, the probe is filled with hquid nitrogen for experiments at 77 K. The sample can also be heated resistively (up to 1500 K) via copper wires attached to the sample for still higher temperatures, an electron beam from a tungsten wire located behind the sample is employed. Temperature is monitored via a ReAV-Re thermocouple. 

A thermocouple is a temperature-measurement device that consists of two dissimilar metal wires joined at one end. An oversimplified diagram follows. 

Figure 3.34. Schematic diagram of the high-pressure thermobalance enclosure. A, end plate with threaded opening for gas inlet fitting B, Buna-N O-ring C. pressure cell D. high-pressure connector for control cable E, balance movement F. furnace chamber G. furnace thermocouple H, furnace heater wire in Marinite insulation J. hexdrive bolts K, end plate with threaded opening for gas outlet fitting (68).

Figure 15.1 Diagram of the temperature controlled chamber. The sample is contained inside the central area (40 x 9 x 1 mm ). This zone contains two platinium wires (0.8 mm in diameter) for vesicle electroformation, a syringe needle for water and solid particles injection, and a thermocouple (not represented). The shaded zone is the voltune flooded by the circulating water. The sample and flooded zones are bounded by microscope cover slips (170 pm in thickness). The thickness of the chamber at the level of the symmetry axis is about 3.4 mm. With the microscope objectives used in the set-up (Z iss Epiplan, x50, N.A. = 0.5), the entire sample volume is accessible to observation and optical manipulation.

Fig. 9.16 Test diagram of H2+methane BF deflagration [ 10] 7 - fans 2 - explosive wire 3—pilot valves 4 - sampler with fan 5 - H2 analyzer 6 -H2 injecting P1-P4 - pressure transducers TC1-TC4 - thermocouples...

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