GB/T 5498-2013Inspection of grain and oils - Determination of test weight (English PDF)

3.1 Test weight

The mass of grains and oil seeds per unit volume, expressed in grams per liter (g/L).

5.3 Sample divider or

sample-reduction plate […]

7.1 HGT-1000 grain test-weight device

7.1.1 Installation of the test-weight device: Open the cover; take out all parts; close the cover. Install the supporting column on the socket of the cover (or a separate socket); install the beam bracket on the column, and fix it with screws; then, install the unequal arm beam on the bracket. Refer to Figure A.1, Figure A.2.

7.1.2 Zero adjustment: Hang the capacity cylinder with the exhaust weight on the hook; move the large and small riders on the beam to the zero scale; check the balance point at no load. If the pointer on the beam does not point to the zero position, adjust the position of the balance weight so that the pointer on the beam points to the zero position.

7.1.3 Measurement: Remove the capacity cylinder; pour out the exhaust weight; install the capacity cylinder on the iron plate seat; insert the insertion piece; put the exhaust weight on the insert piece; put on the middle cylinder. Close the funnel switch at the lower part of the grain cylinder; pour the prepared sample into the grain cylinder; use a board to scrape it flat after filling. Then put the grain cylinder on the middle cylinder; turn on the funnel switch; close the funnel switch after all the samples fall into the middle cylinder. Hold the joint between the grain cylinder and the middle cylinder; pull out the insertion piece smoothly and quickly, so that the sample and the exhaust weight fall into the capacity cylinder together; then insert the insertion piece into the gap groove of the capacity cylinder accurately and quickly; remove the grain cylinder in sequence; pick up the middle cylinder and the capacity cylinder; pour out the excess sample on the insert; remove the middle cylinder; pull out the insert on the capacity cylinder.

7.1.4 Weighing: Hang the capacity cylinder (including the sample in the cylinder) on the hook of the test-weight device and weigh it. The weighed mass is the test weight of the sample (g/L). […]