LPM meter | Klippel R&D testing operation | SILVER|electromagnetic meter

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1. Which is larger, LPM or CMH?

LPM is larger. According to the flow conversion table, 1lps=60lpm, 1lps=3.6cmh, which makes it easy to compare the sizes. CMH stands for cubemeterhour, which means cubic meters per hour. However, CMH is generally only used to represent the air volume in the wind system, and water volume is still mostly expressed in cubic meters per hour. The unit of measurement for PM is liters per minute (LPM), which stands for Library of Parameterized Modules. It is a pure leakage of some macro functional modules that come with Alteras FPGA/CPLD design software QuartusII, such as phase-locked loops (PLLs), LVDS, digital signal processing (DSP) modules, etc. These functions are optimized for Altera devices, and designers use these modules without consuming the logic resources of the devices (LogicCell).

2. Klippel R&D testing operation

Klippel R&D testing operation mainly includes the following process: Connect equipment: According to the operation manual of Klippel R&D measurement system, correctly connect the audio analyzer, amplifier, laser head, standard microphone, industrial computer and other spare parts.

. The tested unit needs to be firmly fixed on the measuring bracket or turntable to ensure stability and accuracy during the testing process. Adjust the laser head and microphone: Adjust the position of the laser head so that the laser head indicator light turns green, indicating that the laser is aligned. Place the standard microphone under the laser head, align it with the measured unit, and ensure that the measured unit and each measuring device are connected correctly. Calibrate laser displacement meter: On the operation interface, enter the Main menu with Enter, s lpm meter

elect Displacement meter, and then select D for calibration. The laser needs to be aimed at a specific calibration grid or rolling silver. When the distance is displayed within the specified range, click OK to complete the calibration. Set the horn for the fixed year banquet and adjust the laser alignment: Fix the horn to ensure it is stable and not moving. Aim the laser at the reflective surface in the middle of the horn and use correction fluid or white stickers to enhance the reflection intensity. Adjust the distance until both the green and yellow lights are continuously on without flashing, indicating that the laser has been accurately aligned. Set test parameters and start testing: When conducting LPM small signal linear parameter testing, click on the corresponding test icon, create a new test item, and enter the file name. Set the test mode to LPM linear parameters and perform relevant speaker attribute settings, such as effective vibration area, voice coil material, rated power, etc. Start testing and observe the test results, including electrical parameters, to evaluate the performance of the tested unit. Adjusting the incentive level: In order to maximize the accuracy of LPM, it is necessary to carefully adjust the incentive level. Avoid distortion caused by excessively high excitation levels and poor signal-to-noise ratio caused by excessively low excitation levels. Utilize the function of LPM to visualize noise floor and distortion, and find the optimal excitation level. The above steps are for reference only, and the specific operation may vary depending on the device model and software version. It is recommended to refer to the operating manual of the equipment or contact the equipment supplier for more de

LPM meter | Klippel R&D testing operation

1. Which is larger, LPM or CMH?

2. Klippel R&D testing operation

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