Main technical features of nb-1 hydrometer: 1. The measurement range is 0.96~3 g/cm 3 2. The scale indexing value is 0.0l g/cm 3 3. The capacity of the mud cup is 140cm 3 4. Instrument size :500(length)*100(width)*100(height)mm Instructions: 1. When using the mud hydrometer, the mud shall be injected into the mud cup 2. Make the cup flush without bubbles 3. Put the lid on gently 4. Brush off excess spilled mud 5. Place the main tool mouth of the lever on the main tool pad of the base 6. Slowly move the weight so that when the bubble is in the center, the lever is horizontal 7. Read the scale shown to the left of the weight (i.e., mud weight). 8. If you need to measure mud gravity of 2~3 g/cm 3, unscrew the balance cylinder cover 9. Put the balancing hammer in 10. Screw the screw cap to measure 11. The instrument should be rinsed and cleaned after use Check method: To check whether the instrument is accurate, the mud cup can be filled with distilled water. If the specific gravity measured in the same way is 1, the meter is accurate.If the result is not 1, then the balance cylinder cover of the hydrometer can be unscrewed to increase or decrease the metal particles in the cylinder so that the specific gravity measured is 1.