1103-MD压差PDI-511在日常生产中经常会出现指示偏高，无线路故障，表、三阀组、导压管、取压阀无堵、无漏，请你分析原因，如何处理。
参考答案：
PDI-511检测的是1103-MD压差，其入口为617℃左右的加热后的混合原料气，出口为980℃左右的工艺气，而PDI-511的正压侧取压阀高于表安装位置2M左右，这样在常温中，正压侧导压管中就会有冷凝液积存，造成正压侧受压增高，使指示偏高。
处理：排表，将正、负相积液全部排掉后开表投用，或考虑正压侧冷凝液影响，进行表量程迁移。
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| Suppose, for example, that a teacher tells her students they each must do one hundred maths problems 1 coming to school the next day. The 2 complain about so much home study. But one student does not 3 anything at all. That student is an eager beaver. He 4 to work out maths problems, and does not mind all the 5 . Another eager beaver works as a salesman for a business. He 6 arrives at the office before anyone else, and is the 7 person to leave. The man works hard, because he 8 his job. He is a true “eager beaver”. The expression 9 the name of a hardworking animal, the beaver. Beavers are 10 creatures. They are like mice and rats, but much 11 . Some weigh more than twenty-five kilograms. Beavers have a large, black, flat tail to 12 them swim. They also have thick brown hair or fur to keep them warm in cold 13 .They have front teeth 14 enough to cut down large trees. Beavers spend a lot of time in the water, building dams（堤，坝） to form little 15 or pools. They work hard to cut down trees, 16 branches and put them across streams. They use their tails to pack mud on the branches to make the dams solid. 17 other animals work so hard. In fact, for two hundred years or more, the beaver was the most valuable animal in North America. And thus most of the beavers were killed. For a time, they were in danger of 18 completely. But laws were passed to 19 the beaver, and today, the 20 is rising. And, like the animal, the expression “eager beaver” is in no danger of dying out. | |||
| ( )1.A.when ( )2.A.children ( )3.A.do ( )4.A.loves ( )5.A.physical labour ( )6.A.seldom ( )7.A.most eager ( )8.A.has to do ( )9.A.comes from ( )10.A.tailless ( )11.A.smaller ( )12.A.make ( )13.A.rain ( )14.A.fearless ( )15.A.lakes ( )16.A.grasp ( )17.A.All ( )18.A.running away ( )19.A.feed ( )20.A.condition | B.instead of B.teachers B.speak B.refuses B.easy job B.sometimes B.last B.needn’t do B.is separated from B.good-looking B.larger B.watch B.land B.smooth B.pipes B.suck B.Most B.disappearing B.raise B.population | C.as C.parents C.ask C.hates C.homework C.always C.only C.loses C.is given to C.strange-looking C.quicker C.let C.water C.quick C.gardens C.remove C.Many C.missing C.catch C.quality | D.while D.headmasters D.say D.fails D.housework D.never D.first D.enjoys D.has nothing to do with D.kind-hearted D.better D.help D.ice D.sharp D.parks D.climb D.Few D.losing D.protect D.safety |