1) The sample is not uniform, ie the sample has different components. The more uneven the sample, the greater the amount of sample needed, so that the test results with very good repeatability can be obtained;
2) When the selected drying time is too short (for "timed shutdown" mode). Extend the drying time or choose a suitable "weightless" off mode;
3) The sample did not completely dry (formation of skinning phenomenon). Samples dried with a fiberglass tray;
4) The drying temperature is too high and the sample has been oxidized. Reduce the drying temperature;
5) The sample boils and spills out continuously causing the quality to change. Reduce the drying temperature;
6) The protective glass of the halogen lamp is contaminated and the heating capacity is insufficient. Need to clean the protective glass of halogen lamps;
7) The temperature sensor is contaminated or defective. Clean the temperature sensor or replace it with a professional maintenance engineer.
8) When the support to place the instrument is unstable. Use a stable support;
9) The surrounding environment is unstable (vibration, etc.) and the environmental conditions are adjusted.
2. Which samples are not suitable for determining moisture content with a quick moisture analyzer?
1) The sample is explosive, probable, or even smokey when heated. There is a large amount of unsafe factors and it is not suitable for moisture analyzers.
2) When the sample is heated, it forms a surface film, which causes a large pressure inside the sample. These samples are also not suitable for the moisture analyzer because of their great danger;
3) The sample is toxic and has a caustic matrix, which can only be dried in a fume hood;
4) The sample generates strong corrosive vapors when heated;
3) Those unknown samples that may exist in the above four cases are also not suitable for moisture analyzers.
3. What should be done when special samples are used to determine moisture content?
1) Liquid sample: The use of glass fiber discs, uniform distribution of the sample, shorten the drying time and has good reproducibility;
2) Paste, fat-containing, and melted samples: Use fiberglass trays to increase sample surface area for good results;
3) Volatile sample: The manual start mode is used (if possible, please select mild temperature increase mode);
4) Surface-condensing or temperature-sensitive samples: Use a mild temperature-rising mode and cover the glass fiber disk over the sample. Slowly heat the sample;
5) Sugar-containing samples: Select a modest warming mode and a moderate temperature. Spread the sample thinly on top of the sample pan to avoid coking.
6) Large volume fluffy samples: Use a mesh cover sample tray, select the appropriate sample volume, and pay attention to the heating process of the sample;
7) Plastic Particles: The step-up mode is used to set the high resolution and standby temperature. Samples must be filled with the sample tray.
Shanghai Jiashi Electronic Technology Co., Ltd. is a provider of advanced moisture measurement control solutions in China and has been deeply cultivating moisture detection technology for many years. Shanghai Jiashi Electronic Technology Co., Ltd. has always adopted advanced chips and strict quality control to supply high-quality products. As always, we are dedicated to providing customers with quality products and services, and is committed to developing new water for customers. measuring system. Everything for the satisfaction of customers is our greatest wish. Users are welcome to negotiate.
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