Electric contact thermometer is how to maintain, what common fault?

Electric contact thermometer are designed according to different water vapor and resistivity. Electrodes measuring cylinder in water of the impedance of the barrel is small. In the steam on the impedance of the cylinder. As the change of water level, the number of electrodes in the water changes. Converted to electrical resistance change. Transferred to the secondary instrument, so as to realize water level's display, alarm and interlock protection, etc. What are the common faults electric contact thermometer, how to maintain and use? KRc magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

( 1) Electric contact thermometer, sometimes very contradictory at the same time the lower limit alarm device, the electric contact thermometer kRc magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

time table, the lower limit alarm indicator lights flash at the same time. The high and low on both ends of the actual level of although cannot exist at the same time, but it is in the second table of occur frequently, especially when the liquid level detection JianGang emissions to open the table, after are more likely to appear. For example, when the glass thermometer indicates 60% scale place, control room of the second table level were 50% and 75% above the ceiling light is below the lower limit position both flash, said liquid level is above the ceiling and below the lower limit, obviously it is not possible. KRc magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

to analyze its reasons are as follows: after the discharge of the liquid level detection tube, the actual glass thermometer instructions below the ceiling, 75%) Scale. But at the moment, high quote for means, lights flashing, explain the high alarm circuit has formed pathways. This may be the electrode short circuit; 。 Or outside the electrode end connection fall off, and testing tube shell ( Public power supply) Contact; Dirt may be outside the electrode end, and testing tube shell short-circuit; There may be the loop cable grounding phenomenon, so the light is flashing. Sometimes such high quote for light flash last a few minutes will go away, back to normal, explain high newspaper reputation flash is because at the time of discharge electrodes on the residual liquid beads and test tube container wall flow liquid beads are interlinked, caused by mistake. If high after half an hour for the light is still shining, and the actual level and normal, it should be in accordance with the above several reasons to look up. This high quote for flash phenomenon or sometimes caused by false level. And sometimes in the normal level, liquid level detection tube after discharge, lower limit of 5% scale in flash to glance, show that the circuit has been cut-off, may caused during discharge electrode outer end connection broken or contact is bad, bad contact caused by cable wire is broken or terminal; May also be a secondary table limit (50%) The circuit has a problem. Sometimes fake level can also cause low alarm flash. KRc magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

( 2) The electric in the electric contact thermometer are easily to have covered by oxide phenomenon, make the electric contact thermometer as time delay kRc magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

long, its reliability and sensitivity decreases. That can be used to reduce electrode point current methods to solve, because it makes the electrode adsorption force greatly reduced. Also pointed electrode can be used, because it has a certain self-cleaning ability, so as to prolong the service life of electrode, increasing the reliability of the work. In addition, can also adopt the method of oblique installation, in order to reduce the electrode, the lower limit alarm opportunities at the same time, because it has the potential to electrode liquid beads and vessel wall flow liquid bead interlinked probability decreases. Electric contact thermometer often drainage, steam flushing, to reduce the electrode head coverings, make its contact cleaning, make the light on the second table not dark or instructions. KRc magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer

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kRc magnetic flap | | glass thermometer thermometer floating ball | | glass thermometer thermometer two-color thermometer