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If the moisture content of the sample (example: plastic) can be estimated that is less than 1%, the mass of moisture is not enough for the measurement, when measuring light sample, the result may not be accurate. Consider the following sample mass for the measurement. An estimate of moisture content 1% 0.5% 0.1% Necessary mass for measurement 2 g at least 5 g at least 20 g at least If the measurement is repeated, maintain the same sample quantity. Crush grain samples to a small, uniform powder for a quick drying process. Spread the sample as evenly as possible. The analyzer is designed to measure the moisture content No good Good of the sample by its weight change. If the sample includes volatile matter, it may vaporize during drying causing a measurement error. When measuring a liquid or liquid state sample that may make a film on the surface, we recommend you use a glass fiber sheet (AX-MX-32-2). 5.3.2. Operation of the analyzer Press the RESET key to display the zero value before each measurement. Check that the displayed sample weight is stable before measurement. Press the START key to start a 0. 000g measurement. 2. 02 5.%/min 43% Select the proper Analysis Mode to finish a measurement. Use the change of moisture content per one minute [%/min] Result display that is displayed during measurement as a reference value. The analyzer needs a pre-heating process before measurement. When measuring samples repeatedly or continuously, the first result is always different from the others. The pre-heating process is as follows: Put a sample pan, instead of a sample, on the pan. Press the START key to heat it. The analyzer temperature becomes equilibrium. Use a sample on the sample pan that has cooled to room temperature. When a sample is put on a hot sample pan, the moisture content is diffused before measurement, and precise results are not possible. We recommend you use multiple sample pans. Do not pile up sample pans during a measurement. Avoid drift and vibration of air conditioners. It may cause "measurement error" and "unstable value". In particular, because MS-70 is sensitive instrument, it is necessary to consider these influences. When the difference between ambient temperature and sample temperature is small, it may cause temperature control error. Example: If the heating temperature is crossed to the range of 30°C and 50°C, it is affected by an room temperature. Check the activation of the halogen lamp with the operation indicator. Example: If low heating temperature is set, the brightness of halogen lamp becomes dark. MS-70 / MX-50 / MF-50 / ML-50 17 Check the activation with blinking 18 MS-70 / MX-50 / MF-50 / ML-50 5.3.3. The Glass Fiber Sheets Use the glass fiber sheet to measure the moisture content that is included in the following samples. When this sheet is used, vaporization of moisture is speeded up and moisture measurement result becomes quick and precise. This accessory (AX-MX-32-1) is a package of 100 glass fiber sheets. This accessory is inclued in the packing for MS-70, MX-50 and MF-50. Purchase this accessory by your order for ML-50. Use the glass fiber sheet (AX-MX32-1) for high surface tension liquid sample. Example 1 : "Liquid Sample" Or "Meltable Sample" When the glass fiber sheet is used for these measurements, moisture is more apt to vaporize because of expanding the surface area and space. And the glass fiber sheet has the effect of preventing a surface film from forming at drying process. A sample including a lot of moisture : Milk, yogurt, soybean milk, condensed milk, ketchup, resin, liquid paste, hand soap, etc. A sample that melts and adheres to the sample pan. Example: Chewing gums, caramel, hony, etc. Procedure (Preparation before heating) 1 Put the glass fiber sheet on the sample pan. 2 Press the RESET key to display zero. 3 Soak the sample into the glass fiber sheet or put the sample on the glass fiber sheet. 4 Press the START key to start the measurement. Example 2 : "If The Sample's Surface Is Apt To Carbonize" When the sample is covered with a glass fiber sheet, carbonization of the sample surface decreases. Therefore the measurement result becomes repeatable and precise. A sample including a lot of sugar, protein and oil Example: Hony, soybean powder, green tea leaves, cookies, etc. A sample that has dark surface and is apt to carbonize Example: Coffee, peanuts, etc. Procedure (Preparation before heating) 1 Put a glass fiber sheet on the sample pan. 2 Press the RESET key to display zero. 3 Remove the glass fiber sheet. 4 Put the sample on the pan. Cover the sample with the glass fiber sheet. 5 Press the START key to start the measurement. 0.000g Glass fiber sheet Sample pan Liquid sample Zero display 0.000g Sample Glass fiber Sample pan Zero display No good Good Spread the sample as evenly as possible. 6. Measurement Procedure 6.1. Standard Mode Operation 6. Measurement Procedure 6.1. Standard Mode Operation The standard mode can obtain the moisture content with set...
Ce manuel est également adapté pour les modèles :Thermostats - MF-50 (1.2 mb)
Thermostats - ML-50 (1.2 mb)
Thermostats - MS-70 (1.2 mb)
Thermostats - MX-50 (1.2 mb)