Easy to neglect the thermocouple test content

Some of our inspectors at the time of verification was carried out on the thermocouple, can easily find some common problems, such as wiring loose, the accuracy of data and so on, but there are some problems often is what we are easy to neglect. Let HuiXin thermal meter to tell us about what we are missing?

1。 The length of the thermocouple in the related regulations, the length of the thermocouple he may not be less than 750 mm, because the length of the thermocouple, he was not up to standard error is caused by negative, only after modification is positive, and the shorter the length of his error. So we must make before for furnace charging HuiXin thermal meter to confirm the length of the thermocouple. ,

2。 Thermocouple wire if thermocouple wire have pollution or oxidation, so it makes hot the surface of the electrode wire pair without burnish, because hair black hair and dark, hot for this time of the electrode performance is not very stable, so the measured data accuracy is poor, so we need to clearing all the pollution in the test.

3。 Thermocouple wire bending thermocouple wire is soft, so it is very easy to appear deformation, if have a folding wire distortion, etc. , it will put his thermoelectric performance change together, so we have before the verification to straighten the thermocouple wire. ( Figure/http://www. wuxiyibiao。 com/)