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The exact adjustment depends on the specific sampling equipment and the bulk material to be examined. Typically, however, the following aspects could be adjusted:

  1. Sampling quantity: This is the amount of bulk material taken during each pass of sampling equipment. It should be set to be representative of the total volume of the bulk material, but not so large that it overloads the equipment or affects the accuracy of the sample.
  2. Sampling frequency: This is the frequency with which samples are taken. For example, it could be set to take a sample every few minutes, or to take a sample only when certain conditions are met (e.g., when a certain amount of bulk material has passed through the sampling area).
  3. Location of sampling: This refers to the place where the sample is taken. It may be necessary to adjust the position to ensure that the samples are representative of the entire bulk material.
  4. Sampling speed: This is the speed at which the sampler removes the material. Too high a speed can cause the material to be damaged or the sample to be unrepresentative, while too low a speed could slow down the sampling process and reduce efficiency.
  5. Sampling angle: For some types of sampling equipment, the angle at which the device enters the bulk material can be adjusted. This can be important to ensure that the instrument is capable of taking a representative sample, especially if the material is heterogeneous.

Each of these settings may need to be adjusted over time, as bulk material characteristics, environmental conditions, or sampling requirements may change. It is also important to regularly maintain and calibrate the equipment to ensure that it is working correctly and providing accurate results.