Thermocouple compensation wire – it only compensated for bird droppings; didn’t it compensate for anything else? ,,, Those who disagree, come and argue. . . Hehehe....
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This post was last edited by 1111111 on 2016-10-27 at 13:39. Thermocouple compensation wire – it only compensated for some trash; nothing was actually compensated! ,,, Those who disagree, come and argue. . . Hehehe. . . Thermocouple compensation wire – it compensated for some bird feathers, but didn’t compensate for anything else! ,,, Those who disagree, come and argue. . . Hehehe. . . Thermocouple compensation wire – it compensated for an egg-sized amount, but didn’t compensate for anything else at all! ,,, Those who disagree, come and argue. . . Hehehe. . . Please have the defense attorney come and explain what parameters are involved in compensation, and how compensation is actually implemented. Please come here, please{:3_51:}
The original poster is an expert in instrumentation, I often see you sharing insightful opinions; please keep giving me your guidance in the future
I’m not coming. You two fight each other then; we’ll watch the fun.
The function of a thermocouple compensation wire is to extend the thermocouple, moving its cold end to a location where the temperature remains relatively constant; it compensates for the insufficient length of the thermocouple: lol
A thermocouple consists of a circuit made up of two conductors of different materials, with a small current flowing through this circuit to convert temperature into a thermoelectromotive force signal. The corresponding temperature can be determined using a thermocouple calibration table, which is established under the condition that the cold junction temperature is 0°C; therefore, it is necessary to keep the cold junction at a constant temperature. Since thermocouples are relatively expensive, and different metals generate thermoelectric potential at the connection points, inexpensive metals with a thermoelectric potential that matches the nominal value of that of the thermocouple are used as compensation wires within a certain temperature range, in order to move the cold end of the thermocouple to the cabinet or to the temperature measuring device. So I think the compensation wire is used to make up for the distance difference; I’m not sure if I understand this correctly. Please correct me if I’m wrong.
1. Thank you, expert, for starting the discussion! :Handshake 2: “Length” – whether the thermocouple is longer or shorter has no impact on the magnitude of the thermoelectric potential; in other words, it has no effect on the temperature of the parameter being measured. Thus, length does not cause any errors in temperature measurement! So, what’s there to compensate for in terms of length? 3. The \"place\" to which the compensation wire is extended – whether the temperature at this place remains constant or not has nothing to do with the thermoelectric potential of the thermocouple; in other words, it is unrelated to the temperature of the parameter being measured. Therefore, this place does not cause any errors in temperature measurement! So, I can’t see clearly; what exactly does the compensation wire do? 4. Please invite the opponents; let’s have a discussion and a debate
Compensate for the price difference between precious metals and cheap metals, saving a bit of cost: D
If it is made of precious metals, copper wire can be used directly; of course, the quality of the copper wire should be good. :lol
Really, really, really? ,,, Is the red compensation wire for cattle really just a copper wire? Gagaga Really? Really? Really? Chat friends, come on, let’s debate!
Since the signals from S- and R-type thermocouples are similar below 100°, compensation wires are not necessary. However, for points used in temperature control, compensation wires are still required, and the temperature resistance of these wires must be taken into account. If the operating temperature exceeds 100°, compensation wires with a temperature resistance of 200° or higher, such as the SC type, should be used. By the way, I’m asking an expert to take the photos, as I’m new to temperature measurement.
"Didn’t behave well in my past life, so now I work as an instrument technician. “Here, it’s: Didn’t cultivate oneself in the past life, so now one works as a machine mechanic.”； If one does not cultivate in this life, they will still have to do so in the next. “