Centrifuge is one of the most commonly used basic equipment in laboratory department, which is widely used as an indispensable tool for serum, sedimentation of tangible cells, concentration of bacteria, etc.

Of these specimens, the largest amount of blood is the largest, and the blood specimens need to be centrifuged and the serum can be separated.

Many other specimens also need to be centrifuged, so the utilization rate of the centrifuge in the laboratory department is very large, and it has to undertake the examination of various clinical specimens such as blood, body fluids, secretions, and excretions of patients every day.

The blood collection tube will be placed on the rack where the vacuum blood collection tube is inserted, and when a certain number is reached, it will be put into the centrifuge for centrifugation, because a test tube cannot be centrifuged, and the centrifuge needs to be balanced during the centrifugation process.

Although some laboratory centrifuges are automatically balanced, it is impossible to say that a test tube can be centrifuged, but it can maintain normal operation when the weight difference is not very large.

The centrifuge process is very large, unbalance will lead to accidents, centrifuges have protection devices, in the case of unbalance can not operate normally, the test tube into the centrifuge is symmetrical.

After starting the centrifuge, the speed of the rotor is slowly increased, and then the set speed is reached, when the set time is reached, the centrifuge will automatically stop, due to the action of inertia, the speed of the centrifuge will slowly decrease from the set speed, and will not stop to zero immediately, so after stopping, the door cover can not be opened immediately.

When the centrifuge speed is zero, the doctor will remove the centrifuged blood collection tube, put it on the test tube rack, and send it for testing.

If the centrifuge in the laboratory department encounters a failure, how to solve it, there are generally two situations:

The first situation is that the bearing is damaged or the rotation is blocked: there is a lack of oil in the bearing, or there is more dirt in the bearing, which causes the friction resistance to increase, and the motor cannot reach the rated speed, so the bearing should be cleaned or replaced in time.

There is a layer of oxide on the surface of the commutator, or even burned unevenly, or the brush and the outer edge of the commutator do not match, which can also reduce the speed, and the commutator and the brush should be cleaned to make good contact.

If there is a short circuit or open circuit in the rotor coil, it can be checked with a multimeter and rewound the coil.

When the rotor is in use, it can cause the centrifuge tube to rupture, sample leakage, and rotor damage due to metal fatigue, overspeed, overstress, chemical corrosion, improper selection, unbalanced rotor head and temperature loss during use.

The second situation is that the motor cannot be started during the use of the centrifuge.

If the main power indicator light is on, the degree of wear of the carbon brush should be checked, if the wear of the carbon brush exceeds one-third of the total amount, the new carbon brush should be replaced in time.

When the main power indicator is not on, check whether the indicator fuse and the fuse of the indoor distribution board are blown or not, and check whether the power cord is in good contact, if the fuse is broken, the fuse should be replaced and the circuit should be kept unblocked.

The vacuum pump gauge and the oil pressure indication value should also be checked, if the oil pressure is too high and the main engine can not be started, it is necessary to check whether the oil circuit is blocked, especially whether the throttle hole is unblocked, if it is not unblocked, it should be cleaned to make it unblocked.

Last night, Warlene followed Director Zhang to completely dismantle the centrifuge in the laboratory department, inspected it inside and out, cleaned up the cleanup, did not let go of any corners, changed the accessories that should be replaced, and changed almost all the accessories that could be replaced.

I thought that I had served the centrifuge so aggressively, and the centrifuge could make people worry about it for a while, but who knew that it backfired, and it only worked for half a day before it stopped, and the reason was that the motor that was struggling to breathe, and the coil of the rotor was short-circuited.

"I haven't bypassed the coil by myself for many years," Director Zhang smiled, "It's not certain whether it will work out or not." ”

Before Director Zhang paged to Wallen, he judged that there was a problem with the centrifuge motor through the description of the laboratory technician on the phone, and immediately called the shop that he often deals with to repair the motor, asking the other party to come to the door for repair.

This model of motor is no longer produced, and other models of motors can not be replaced, every time the coil burns out, the people in the maintenance team take it to that shop to repair.

The shop repaired this motor many times, and it was easy to control, and the coil of the rotor did not need to be tested repeatedly, basically only one test can be passed, and it can be installed and used directly, which is much more efficient than finding another shop for maintenance.

The proprietress who answered the phone told Director Zhang that the store would not take jobs two days earlier, and she and her husband were going home to prepare for their son's marriage, and her husband went back two days early, and she stayed in the store to sweep the tail, and she was going home today.

As a last resort, Director Zhang can only wind the coil by himself, and he can't start the laboratory because the shop that repairs the motor is not open.

As mentioned earlier, due to the limitations of teaching conditions, Volin has never done experiments in experimental classes since she was a child, and even if she is a teacher with a class, she basically follows the textbook, and she is allowed to memorize what is in the textbook, and the teacher rarely has the opportunity to do experiments.

That's why when Wallen and her group did the graduation project experiment, Professor Lan emphasized the precautions of the experiment over and over again because he was not at ease, and taught Wallen how to do the experiment like a primary school student, and the graduation design experiment officially began.

Therefore, don't look at the fact that Wallen is a college student who has studied electronics, her actual hands-on ability cannot be compared with Director Zhang, who has not graduated from high school but has worked for many years.

"Master, what do you mean by this, you used to wind coils in the past?"

", that's what I used to do. Director Zhang looked proud.

"Since you've done this before, you'll be able to do it this time. Warlene laughed, "That's a small thing to you." ”

When Xiucai was sober, he would also chat with Warlene, and Xiucai admired Director Zhang very much, saying that Director Zhang used to be just an ordinary worker in the motor factory, and he didn't graduate from high school, and he was able to enter Z Hospital as the director of the maintenance team, which is a real ability.

Zhuo Di, a technician in the laboratory department, laughed: "Xiao Wo, you worship Director Zhang as a teacher these days, I don't know if your maintenance skills have improved, because I don't know what your previous skills were, but your ability to pat on the back is increasing day by day." ”

The biggest gain of Wallen's help in the personnel department is that she has met a lot of people, and Zhuo Di is the one she met at that time.

This Zhuo Di can be regarded as a wonderful flower of Z Hospital, with two major characteristics.

One is that he is not married in his forties, it is said that because he had too high requirements for women when he was young, but he himself is not good-looking, so he can't look at any girl, and then he gets older, and he has no idea of getting married.

Moreover, for people of his age, the title is not high, but also deputy high, at least it is also an intermediate title, and he, after graduating from college and joining the work in the second year of entry, there has been no movement, and his business ability has been one of the best in the laboratory department more than ten years ago, and has been advancing with the times over the years, and few people have surpassed him.

Every time someone asks him why he doesn't get into the title, his answer is always that he is only interested in testing.

Waren heard Section Chief Pei say in private, but if Zhuo Di can have an intermediate title, the title of deputy director of the laboratory department will fall on Zhuo Di, and in Z Hospital, if you want to be the deputy director, you must at least have the title of deputy high school or above, which shows that the hospital attaches great importance to Zhuo Di.

As the saying goes, the emperor is not in a hurry, the eunuch is in a hurry, he is talking about Zhuo Di, the hospital tried every means to entrust him with a heavy task, but he was always a posture of "Ren Er's southeast and northwest wind, I stand still", which made the hospital leaders also have a headache.

"Uncle Zhuo, how can I be a sycophant, I'm telling the truth. Warlene smiled and asked Director Zhang, "Right, master?"

"It must be right, where else do I put this face?" Director Zhang said as he handed the rotor to Wo Lin, and pointed to a roll of enameled wire resting on the ground next to him, "I said, you come." ”

"Huh?" Warlene didn't expect Director Zhang to let her do it, she hadn't seen a coil before.

"Ahhhhh ”

"Oh. "Warlene followed Director Zhang's words step by step.

Solder the wire first, and then according to Director Zhang's instructions, wrap the enameled wire around the rotor until the other end of the enameled wire is welded.

"It's done, haha. "Director Zhang is happy.

"Is this what it is?" Warleen didn't believe it was her own rotor.

Director Zhang instructed Warlene to assemble the motor, and said: "It looks like it's done, and we have to try whether it can be used." ”

"Oh. Wallen breathed a sigh of relief.

This is normal, the genius behavior that succeeded the first time seems to have never befallen her.

After repeated modification experiments, when the motor was able to drive the centrifuge normally, it was already early in the morning.

After yawning a few times in a row, Warlene remembered to ask Director Zhang for leave, and said it in a hurry.

"Even if you don't ask for leave, I plan to give you two days off tomorrow and the day after tomorrow," Director Zhang asked Wo Lin, "Have you bought a train ticket?"

"Not yet. When it came to train tickets, Warlene was a little frustrated, how could the train tickets for the Spring Festival be so easy to buy.

Director Zhang's face was full of seriousness: "If you can't buy it, don't buy it, the Spring Festival seven-day holiday, I will arrange your shift, there will be three times the overtime salary every day, and there will be additional rewards, calculated down, the Spring Festival plus seven days of work is equivalent to the usual one month's class, after the Spring Festival, I will approve you to repair the family leave, when the ticket is easy to buy, the car is not crowded, and you can use the overtime salary to buy more things for the family."

"You have been with me for a while, I know you well, with your temperament, you are on duty just fine, and you will not leave the hospital casually, so your duty will not be easy, and the day after tomorrow will be regarded as giving you early compensatory leave. ”

"Shift me?" Of course, it would be nice to be able to earn overtime pay, but Wallen was self-aware, "My skills can't be on duty alone, right?"

Director Zhang didn't care: "If you can fix it, you can fix it, and if you can't fix it, you can register it, and then talk about it after the holiday." ”

The locals pay attention to the fact that from the first day of the first month to the fifteenth day of the first month, it is not a fatal emergency not to enter the hospital, otherwise there is no good omen for this year, so during the Spring Festival holiday, each department is relatively idle, even if there is a repair instrument, it is not very urgent.

Therefore, every year on duty during the Spring Festival, someone in the maintenance team takes the initiative to ask for help.

After all, everyone in the maintenance team is equipped with a pager, and there is no need to stay in the department like the staff on duty in other departments, as long as there is no equipment that needs urgent maintenance, they will not delay visiting relatives and friends for entertainment and carnival, and there is no difference between duty and vacation.

"Okay, thank you, master!" Warleen agreed.

On a seven-day shift, the salary she gets is equivalent to a month's shift, so it's no wonder that Wallen is not moved.

What's more, train tickets are really hard to buy, and she doesn't have time to queue up for days at the train station to buy tickets like others.

Back in the dormitory, Warlene saw her bed, like a relative she hadn't seen for decades, her teeth hadn't been brushed, her face hadn't been washed, her coat hadn't been taken off, she didn't even care about the habit of going to the toilet before going to bed, and she didn't want to get down when she stuck to the bed.

Fortunately, she also knows how to kick off her shoes habitually, otherwise she will have to wear her shoes into the bed.

Smelling the smell of the food, Wallen opened her eyes, there was a light tube on her head, turned her head to look around, it seemed that it was not yet dawn, Wallen closed her eyes and continued to sleep, wondering that she had woken up so soon.

"Hey, if you sleep again, you'll become a pig grandma. Li Lei's joking voice sounded in front of the bed.

Warlene didn't bother to open her eyes, and replied: "You are Zhu Bajie, Zhu Bajie who is carrying a-stirring stick." ”

"Hey, I don't know good people's hearts!" Li Lei kicked on the leg of Warlene's bed.

"What are you doing?" said Wallen, glaring angrily.

happened to face Shen Xian's crying and laughing face on the top of his head: "You two belong to chickens, pinch when you meet, Wo Lin, get up and eat when you wake up." ”

"It's too early, it's not dawn yet, Mr. Shen, why are you cooking so early?"

"You're really a pig grandma," Li Lei sneered, "Look at the time, what time is it?"

Warlene didn't want to pay attention to Li Lei, but she was also annoyed by Li Lei's quarrel, so she thought about refuting Li Lei had nothing to say, and raised her hand to look at her watch.

Seeing the time clearly, Wallen muttered: "This watch is going to be repaired, and it hasn't dawned yet, so it's past nine o'clock." ”

Shen Xian smiled: "Your watch is not bad, it's nine o'clock now, it's right, but it's nine o'clock at night, and you slept all day." ”

"What, it's more than nine o'clock in the evening?" Warlene sat up in surprise and asked Shen Xian, "Has Jian Kang been here?"

Shen Xian nodded: "Xiao Jian has been here a few times, but I can't wake you up, and I came here at night, and I just left not long ago." ”

"Huh?" Warleen was a little frustrated.

There were only two days off, and half of it was for himself to sleep, and he promised to go out with Jian Kang today, and broke his promise again.

Li Lei said in a cheerful tone: "Isn't it that I didn't play with my boyfriend, don't worry, you still have a chance to compensate, I have made an appointment with Jian Kang with Sister Fairy, and I will make light bulbs for the two of you tomorrow, anyway, there are already two light bulbs Zeng Yiyi and Jian Fu, and there are two more Sister Fairy and I, it doesn't make much difference." ”

Li Lei was on duty with the teacher last night, and on the way back to the dormitory after handing over the class, checking the room, and on the way back to the dormitory, he met Jian Kang and Director Zhang of the maintenance team talking, Jian Kang was courteous and deferential to Director Zhang, which made Li Lei feel a little surprised.

Since Jian Kang and Warlene confirmed their relationship, Jian Kang has become superficially enthusiastic about the boys around Warline, and he is alienated in his bones.