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ECI Engingeer
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I am trying to find out if type K thermocouple is capable of transmitting power from an external power supply to a camera and some lamps attached on the end. I have 3 pairs of thermocouples. One pair for the camera supply. One pair for the video output. One pair for the lamps.
I have tried google for answers but have found very little useful information.
Thermocouple specs:
Length approx 75m
type K
22AWG
loop resistance 0.9368Ω/foot
Camera specs:
11.5V to 15V DC
400mA to 500mA
Video output specs:
2V p-p into 150Ω
Lamps Specs
0.5A
12V DC
LEDs
Analysis i have done so far:
Resistance of thermocouple- 246x0.9368=231Ω
Voltage drop across the thermocouple- V=IR=0.4x231=92.4V
If the current was to decrease by 10mA this would cause the voltage at the camera to decrease by 2.3V- 0.39x231=90.1V
If the resistance was to increase by 1Ω then the voltage will increase by 0.4V- 0.4x232=92.8V
At a lamp supply of 0.5A the power dissopated over the length of the thermocouple would be approx- P=IIR=0.5x0.5x231=57.75W
Equating to 0.77W/m
I look forward to your responses.
I have tried google for answers but have found very little useful information.
Thermocouple specs:
Length approx 75m
type K
22AWG
loop resistance 0.9368Ω/foot
Camera specs:
11.5V to 15V DC
400mA to 500mA
Video output specs:
2V p-p into 150Ω
Lamps Specs
0.5A
12V DC
LEDs
Analysis i have done so far:
Resistance of thermocouple- 246x0.9368=231Ω
Voltage drop across the thermocouple- V=IR=0.4x231=92.4V
If the current was to decrease by 10mA this would cause the voltage at the camera to decrease by 2.3V- 0.39x231=90.1V
If the resistance was to increase by 1Ω then the voltage will increase by 0.4V- 0.4x232=92.8V
At a lamp supply of 0.5A the power dissopated over the length of the thermocouple would be approx- P=IIR=0.5x0.5x231=57.75W
Equating to 0.77W/m
I look forward to your responses.
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