On height of about 18 m and inner diameter of 100 mm of a cold riser experimental apparatus, the measurement accuracy of the HDLDG06 powder flowmeter was studied based on the particle circulation measured by volumetric meathod. The results show that the measurement accuracy of the flowmeter has little relationship with the particle circulation strength in the riser, while it has direct relationship with the crosssectional average concentration of the particle in the riser. When the sectional average concentration of the particle is less than 6.9 kg/m3, the powder flowmeter has quite a good measurement accuracy. While the sectional average concentration of the particle is more than 6.9 kg/m3, the powder flowmeter has quite a poor measurement accuracy.According to the experimental data, correction expression and its using condition isestablished for the HDLDG06 powder flowmeter applied to the riser.