How to carry out daily inspection and performance verification of checkweigher
Checkweighers are now very commonly used in production lines in various fields. As electronic industrial equipment, it is obvious that they cannot be used all the time after installation. It must be inspected daily and its performance shall be verified. So how to carry out daily inspection and performance verification on the checkweigher? Let's take a look at it below. After confirming that the checkweigher has been energized and preheated for a period of time (for example, 15min) in the daily inspection of the checkweigher, the conveyor of the checkweigher can be started to run without load, and the corresponding keyboard can be operated to issue instructions for zero adjustment. Empty the load carrier and observe whether the display value of the weighing indicator is zero, if it is not zero, it can be set to zero manually. The product can then be tested. First put the product in the center of the carrier, read the displayed value, and then start the checkweigher machine conveyor to enter the dynamic test, let the product pass the carrier, and the weight value read when the product passes the carrier dynamically It will be different from the weight value in the static test. If it is within the allowable error range, it will meet the requirements. Let the product repeat several times (such as 10 times, 20 times) through the carrier, and carefully observe the repeatability of the checkweigher. If the reading error is large or the repeatability is not good, you should check whether there is a jam in the mechanical part, whether there is a problem with the installation of the load-bearing device. performance verification The user of the checkweigher is responsible for ensuring that the performance of the checkweigher machine is consistent during the service life of the checkweigher. The supplier of the checkweigher can assist the user of the checkweigher to achieve this goal. In general, performance verification recommendations should be conducted by authorized engineers once a year or every two years to verify that the equipment still maintains the specified accuracy. The main content of the performance verification is to carry out the following two tests: 1) accurate weighing 2) can be correctly eliminated according to the weight deviation of the product. In addition, it should be ensured that the following functions of the checkweigher system are normal and effective: 1) All additional warning/signal devices 2) The safety system works. As part of the checkweigher supplier's regular service plan, performance verification should be performed by the checkweigher supplier’s technical service personnel to assist the user of the checkweigher. They have a deep understanding of checkweighers, rich experience, and the tools and equipment required to perform performance verification to make this work go smoothly.
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