HuaZheng ASTM D1298 Automatic Liquid Densitometer Transformer Oil Density Tester Price

1. Open the packing box and check if the instrument is intact and if spare parts are complete, and then place the instrument in a well ventilated position without direct sunlight and installed accessories.

2. Wash the tub and add pure water or salt water into the bathtub to fifteen centimeters from the cover.

3. Connect the power supply, turn on the power, enter the boot screen, if temperature need to be adjust, press “Parameter” to enter the parameter setting menu and adjust, press “Enter” after modification. And then switch to the testing screen; keep constant temperature for a certain period of time according to the requirement of standard after the set temperature is reached and the conduct the test. The height of the measuring cylinder should be high enough for petroleum densitometer to float in the sample and the distant from bottom of petroleum densitometer to measuring cylinder should be at least 25 mm. When measuring the density with petroleum densitometer, it is most accurate at the standard temperature of 20°C or close to this temperature.

4. When measuring the density for petroleum metering, the measured temperature should be as close as possible to the actual temperature of the petroleum stored in the tank and the temperature should be within ± 3°C of the actual temperature when conduct the testing.  If the measured viscosity of some of the viscous samples is not sufficient in this temperature range, the sample temperature should be raised continuously to a minimum temperature with sufficient fluidity. At this temperature, the petroleum densitometer should be free to float in the sample.

5. Place the uniform sample into a clean density-measuring cylinder carefully along the cylinder wall to prevent from splashing and creating bubbles. When the sample is filled with bubbles on the surface, it can be removed with a clean filter paper. During the transfer process, the evaporation loss of the low boiling component in the volatile sample should be minimized to a minimum. When using a metal density-measuring cylinder to determine the dark sample, make sure that the sample level is within 5 mm of the upper edge of the measuring cylinder to ensure accurate reading of the petroleum densitometer reading. When using a thermostatic bath, the liquid level should be higher than the level of the sample in the density-measuring cylinder.

6. Place the density-measuring cylinder with the sample in a place where there is no airflow. Make sure that the sample temperature does not change significantly during the time required to complete the measurement. During this period, the ambient temperature should not change more than 2 °C. Otherwise, use constant temperature bath to avoid excessive temperature changes. Place petroleum densitometer in the sample gently, and press the petroleum densitometer into the sample for about two scales and release it after the petroleum densitometer is stationary. The rod of the petroleum densitometer above the sample level should be kept as little as possible by the sample, since the excess sample on the rod will affect the result of petroleum densitometer reading. For low viscosity sample, turn it gently when release the petroleum densitometer to help it stays still and floats freely at the place it leaves the measuring cylinder wall, there should be sufficient time for the petroleum densitometer to keep static; For high viscosity samples, let all the bubbles rise to the surface, remove the bubbles, and wait for a long enough time to keep the petroleum densitometer stays still and reaches equilibrium.

7. When the petroleum densitometer is stationary and leaves the density measuring cylinder wall to float freely, the tangency point of upper surface of the meniscus of the sample and the scale of petroleum densitometer is the value of petroleum densitometer. When reading the scale, the line of sight with the upper edge of sample’s meniscus should be at same level. When observing the dark sample, the eye should be slightly higher than the liquid level; the tangency point of upper surface of the meniscus of the sample and the scale of petroleum densitometer is the value of petroleum densitometer.