Correct maintenance and cleaning of platinum-rhodium thermocouple method is introduced

Platinum rhodium thermocouple is a common a temperature measuring element, because the whole equipment is more sensitive, so in the process of use must be for regular maintenance and cleaning, mainly in order to guarantee the precision of measurement and using life. Major maintenance and cleaning method can be divided into the following:

first annealing, and actually annealing is mainly in order to can better eliminate the internal stress of electrode, effectively improve the stability of the platinum rhodium thermocouple properties, so after proper annealing temperature and time would be able to reach the requirement of what we need is very good, normally there are two main ways to annealing is a kind of furnace annealing; Is a kind of electric annealing. Followed by pickling, basically can take advantage of the unique acid oxidation ability, the high temperature of organic matter and platinum-rhodium thermocouple can be acid pickling to remove all other material, high temperature of the precious metal platinum rhodium thermocouple the entire place to a diameter of eighty mm round in the beaker, add thirty percent to fifty percent of dilute nitric acid, for about an hour or so, remove the entire directly into the beaker, again with distilled water for cooking, need continuous cooking several times to achieve the purpose of pickling. Is the cleaning sodium borate, sodium borate cleaning must be done after pickling, this way of cleaning the pickling relatively complex will be many, because it needs to be done together with other devices, so both in time and will take a long time in economy, but the cleaning effect is very ideal, so a lot of customers will choose this way of cleaning.