Electrical Measurements |
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Page 431
... Thermocouple Instruments . OPERATING PRINCIPLE . The essential com- ponents of a thermocouple instrument are : ( 1 ) the heater element ( usually a fine wire or thin - walled tube ) which carries the current to be measured ; ( 2 ) a ...
... Thermocouple Instruments . OPERATING PRINCIPLE . The essential com- ponents of a thermocouple instrument are : ( 1 ) the heater element ( usually a fine wire or thin - walled tube ) which carries the current to be measured ; ( 2 ) a ...
Page 435
... thermocouple B - A - B has one junction held in contact with the heater . In Fleming's arrangement this junction was soldered to the heater , and in the modern ver- sion the junction is welded to the heater . The Peltier effect is thus ...
... thermocouple B - A - B has one junction held in contact with the heater . In Fleming's arrangement this junction was soldered to the heater , and in the modern ver- sion the junction is welded to the heater . The Peltier effect is thus ...
Page 438
... thermocouple may be considered as a d - c generator of emf E having an internal resistance r.23 If an instrument of resistance r , is connected in the thermocouple circuit the current will be = E re + rm Energy will be dissipated in the ...
... thermocouple may be considered as a d - c generator of emf E having an internal resistance r.23 If an instrument of resistance r , is connected in the thermocouple circuit the current will be = E re + rm Energy will be dissipated in the ...
Contents
The Art of Measurement | 1 |
Electrical Units | 15 |
DirectCurrent Galvanometers | 43 |
Copyright | |
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accuracy adjustment air gap alternating current ammeter arrangement balance ballistic bridge C₁ C₂ calibration capacitance capacitor cell compensation connected constant construction decreases deflection detector dial direct current disc effect electrical electrode element emf's equation error field frequency friction function galvanometer heater impedance increase indication inductor instrument insulation load magnetic circuit magnetizing force magnitude manganin maximum measuring circuit mechanical ment meter method moving coil moving system mutual inductance ohms operating oscillograph permeability phase angle plate pointer position potentiometer power factor precision primary quantity R₁ R₂ range ratio arms reading relative damping resistance resistor result scale secondary sensitivity shield shown in Fig shunt slide wire specimen standard switch temperature coefficient terminals test coil thermal thermocouple torque transformer tube units usually V₁ vector voltage circuit voltage drop voltmeter volts wattmeter Wheatstone bridge winding Z₁ zero