Questions tagged [thermocouple]
A thermocouple, is an electrical device consisting of two dissimilar electrical conductors forming an electrical junction. The voltage across a thermocouple is governed by the Seebeck effect. Thermocouples are widely used as temperature sensors.
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Can I Wire a Thermocouple Like a PT100 Sensor
I have an IoT multi-channel controller which can accept PT100 sensors (2-wire or 3-wire). I don't have any PT100 sensors, however I do have K-type thermocouple wire. Is there any way to wire in the ...
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MAX6675 SPI communication with PIC microcontroller
I'm using a PIC16F1832X to communicate with a MAX6675 thermocouple-to-digital converter. As I read the values of the temperature and the SSPBUF register, they are way too high; SSPBUF is 223.
I assume ...
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How do people ground cable shield on thermocouple cable?
I am building an electronic controller that measures the temperature on a metal chamber. Type K thermocouple sensors are placed on the metal chamber, and type k thermocouple extension cable connects ...
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Thermocouple vs NTC
I want to test the accuracy of the NTC soldered in a current sensing board with a shunt resistor. For that, I attached a thermocouple type K to the junction of the shunt using epoxy and applied a ...
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Cold junction temperature measurement in Multichannel Thermocuple
In a multi-channel thermocuple signal conditioner (for example, 5 channels on a single PCB), should I add 5 separate junction temperature measurements to the thermocuple input of each channel to ...
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What is the purpose of the op-amps connected back to back in a thermocouple signal conditioner?
I am trying to design a thermocouple signal conditioner. I came across this structure on the Analog Devices LTC2057 typical application page.
Why was such a connection made instead of using a single ...
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Amplifying op-amp thermocouple circuit
I am trying to simulate a thermocouple amplifying circuit for a project, and for some reason, my output keeps producing a square wave, rather than a sinusoidal wave.
I found this diagram online on a ...
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Testing thermocouple functionality
I am currently working on diagnosing the functionality of a thermocouple from a vintage gas stove, whose safety valve does not stay open with the pilot light heating the hot end of the thermocouple.
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T12 soldering station problem
I am trying to make a “cheap” t12 based soldering station. However there is a problem. Since T12 tips have the thermocouple and the heating coil in series, you have to turn the driving MOSFET off, ...
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Turning power on to relays interferes with thermocouple reader
I have 6 3V reed relays SIL03-1A72-71D that connect to a raspberry pi pico directly via gpio pins 11, 12, 13, 14, 15, 18, and 19 on a custom pcb. The connections to the relays are: 1 is connected to ...
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two thermocouples not reading the same room temperature as a thermometer
(probably operator error/ignorance...)
Trying to read room temperature to verify accuracy of the meter readout w/ K type thermocouple -
I have four devices:
Tektronix DMM916 multimeter w/ K type ...
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How can I connect a 3 wire RTD to a 2 wire system
I received a thermocouple replacement part from a machinery company. It has 3 wires (white, black, green/yellow), but the thermocouple it is replacing only has 2 wires (white, red). Can I use the ...
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Setting the parameters of PID for 10 °C set point
I have a PID controller (REX C100), connected to a TEC1-12706 (Thermal Electric Cooling) and a thermocouple K-type. I want to set 10 °C on my PID.
The problem is that the actual temperature in PID is ...
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Best method to sense low temperatures while using low current
I need to measure temperatures of -80C, and the circuit needs to be battery-powered. So I thought an RTD probe with the MAX31865 RTD-to-Digital Converter would work well. I am using an nRF52840 for a ...
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Output voltage thermocouple amplifier decrease when temperature increase
To detect surface temperature of heating foil, I decided to use thermocouple of type K. To amplify the small signal I choose the thermocouple amplifier with cold junction compensation integrated, ...
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