1. Types, advantages and disadvantages of the attendance machine
There are three main types of machines for time and attendance:
1. Mechanical punching type (combination of mechanical and electronic)
Advantages: simple and intuitive, no computer knowledge, relatively low price, simple and convenient installation, and simple operation of personnel clerks, as long as the employee's attendance records are counted, it is clear at a glance. (Available in office supply stores).
Disadvantages: Statistics are cumbersome, monthly investment is required, and manual statistical reports are required at the end of the month, which is very troublesome. (The slot is vulnerable to damage). Scope of application: This time attendance machine can only be applied to small companies less than 100.
2. Proximity card attendance machine
Advantages: non-contact card reading, no wear and error codes, and the time for each employee to swipe the card is less than 0.1 second. This is a one-time investment used for life, and if the employee leaves, the card can be reused, and a report can be automatically generated at the end of the month, which is very convenient. However, if you buy a time attendance machine of poor quality, there will be a phenomenon of losing employee swipe records, and this kind of trouble is difficult to solve, and it is more troublesome. With backup battery. But there is no need to choose a machine with too complicated functions, because of the many functions, the quality will also be affected.
Disadvantages: Can not solve the problem of "on behalf of punch card". Recommendation: The attendance machine is installed in the security room and supervised by the security guard.
3. Fingerprint attendance machine
Advantages: No need for cards, to solve the problem of playing cards. This is the biggest advantage of fingerprint time attendance and other time attendance.
Disadvantages: The quality of the personnel is required, and the fingerprints need to be cleaned. If the fingerprints are worn, they will not be recognized, just like the deformed key cannot open the lock. The anti-vandalism ability and stability need to be improved, and the function of the attached software is not too strong, and only simple attendance processing can be done.
4. The necessary quality of all attendance machines
Accurate time, attendance data is not easily lost or confused by interference (occasionally unavoidable), and communication with the computer is stable.
2. Attendance software
The current attendance machine comes with simple attendance software. If the requirements for attendance function are not too high, you can choose. If you need more powerful functions or more complicated attendance, you must choose a professional attendance software supplier.
3. Mistakes in attendance machine selection:
Many attendance users see that other companies are using proximity card attendance machines, so they buy one, and the requirements are relatively simple. As long as they can handle simple personnel management and attendance, other functions are not available. , So began to choose the attendance machine. Of course, the goal is the cheapest time attendance machine, but when you buy it, you will find that this time attendance machine does not make attendance simple, but a series of troubles occur: some shifts cannot be handled, and the personnel clerks must use manual Remember; sometimes the attendance machine fails, and the card cannot be swiped; sometimes the employee ’s attendance record is lost. At the end, the employee knows that the attendance opportunity lost the record, so if it is really lost, it is said to be lost. The personnel clerk did not know whether it was true or false, and finally lost the attendance machine and used the clock. So many companies have formed this consciousness: it is not good to use the induction card time attendance machine, it is better to use a punch clock. In fact, it is not the attendance machine that can handle various shifts. The attendance machine is only used to record the employee's card swiping records. The data is processed through the attendance software. Therefore, some shifts cannot be processed with simple function attendance software, so , Attendance machine ≠handle all attendance.
friendly reminder:
1. Before purchasing the attendance and attendance machine, it is necessary to explain the attendance shift to the supplier, to see whether the software of the attendance machine can handle this shift, because some shifts can not handle the software that comes with the general attendance machine, and the function of summarizing the attendance data Whether it can be counted in time, and whether the query of abnormal attendance data can be timely and convenient.
2. Choose a time attendance machine with a backup battery. Some time attendance machines do not have a backup battery. Although power outages are not a frequent occurrence, if the time attendance machine does not have a backup battery and the power is cut off when employees are off duty, then it is certainly impossible to swipe the card.
3. Regardless of the functional requirements for attendance, be sure to choose an attendance machine with stable performance and good quality, otherwise it will cost money and trouble, and the boss thinks you are not doing well.
The commonly used Pipette kits are mainly composed of a pipette and a pipette tip. The pipette tip is a single empty
Cavity reservoir; the pipette uses the principle of air displacement and controls the maximum displacement of the piston by rotating a screw with an ultra-fine thread
displacement, and then control the amount of liquid suction. There are the following problems when using the above kit for suction: 1. The suction volume is controlled by the pipette
After the pipette is sterilized or used for a period of time, it is easy to cause "hidden" failures, which cause the operator to be difficult to detect.
The actual suction volume is inaccurate, and it needs to be adjusted frequently, and the operation is cumbersome and time-consuming; 2. To improve the pipetting accuracy, the operator's
The operation requirements are high, and it is easily affected by factors such as the suction speed, the depth of the tip below the liquid level, and the inclination angle of the pipette.
The actual suction volume will be heard; 3. The actual suction volume will be affected because the suction head cover is not tight and leaking, and it will not be easily detected; 4.
When performing experiments that require high accuracy, such as analysis, in the operation of equal volume aspiration of liquids with different densities, the actual
The actual suction volume will be affected by the density itself; 5. In order to improve the accuracy, this type of pipette needs to carry out high
Cost-optimized design results in extremely high pipette costs.
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