Overview
JFL QXP 0-50 Grindometer is a measuring instrument manufactured in accordance with international standard ISO1524 and national standard GB/T 1724-2019. It is used for the determination of particle fineness such as pigments and impurities in Paints, inks and related products. The model is single-channe Grindometer with a range of 0-50μm.
Features
1. Manufactured in accordance with ISO1524 and GB/T 1724-2019 standards to ensure measurement accuracy.
2. Provide single-channe models to meet different measurement needs.
3. The main body and Drawdown blade are made of stainless steel, which is sturdy and durable.
4. The range is 0-50 μm, Graduation 5 μm, suitable for sample measurement with fineness below 30 μm.
Principle
Grindometer uses a matching Drawdown blade to scrape the sample through the groove at constant speed and pressure by placing the sample to be tested on one end of a scraper with a precision groove. Since the groove depth decreases uniformly from one end to the other, the particles in the sample will be trailed or piled up at a specific depth position. The fineness of the particles in the sample can be determined by reading the scale on the side of the groove.
Applications
Paints, inks, lacquer paste and other products particle fineness determination
Standards
ISO1524、GB/T 1724-2019
Steps
1. Ensure that the scraper and Drawdown blade are clean and drying.
2. Take an appropriate amount of fully stirred sample and place it at the deeper end of the scraper groove.
3. Drawdown blade, Drawdown blade vertically transverse to the plane in front of the scraper groove.
4. Within 1-2 seconds, at a uniform speed and sufficient pressure, the Drawdown blade is pulled from the deeper end of the groove to the shallower end, so that the sample is filled with grooves.
5. Immediately (no more than 3 seconds) observe the position where the particles are evenly exposed in the groove with a suitable viewing angle, and read the scale value corresponding to this position, which is the fineness value.
Notice
• Carefully clean the scraper and Drawdown blade before use to ensure no residue.
• Sampling should be representative and well mixed.
• The scraping operation needs to be uniform, done in one go, and read within the specified time.
• When reading, the line of sight should be maintained at an appropriate angle to the surface of the scraper, subject to the uniform exposure of particles in the groove.
• Select the appropriate range instrument according to the estimated fineness value. This model (0-50 μm) is recommended when the fineness is below 30 μm.
• After use, the instrument should be cleaned in time and kept properly.
