Determining the LNG temperature and the gas phase temperature. Each of the Vessel's tanks must be equipped with temperature sensors placed in such a way that at all times at least one sensor is located in the liquid and one in the gas phase, with the other sensors distributed at regular intervals from the top to the bottom of the tank. The temperature of the LNG before the Unloading or Reloading operations is determined by calculating the arithmetic mean of the measurements from the temperature sensors immersed in the liquid. The temperature of the gas phase after the Unloading or Reloading operations is determined by calculating the arithmetic mean of the measurements from the temperature sensors located above the liquid phase. The overall temperature measurement error, including the temperature measurement system element errors, must not exceed the values in the following table in accordance with standard ISO 8310. overall error of the measuring system Liquid phase – LNG ± 0.2 °C Gas phase ± 1.5 °C
Determining the LNG temperature and the gas phase temperature. Each of the Vessel's tanks must be equipped with temperature sensors placed in such a way that at all times at least one sensor is located in the liquid and one in the gas phase, with the other sensors distributed at regular intervals from the top to the bottom of the tank. Only the measurements in the tanks concerned by the Cargo Transfer are taken into account. The temperature of the LNG before the Cargo Transfer is determined by calculating the arithmetic mean of all the measurements from the temperature sensors immersed in the liquid. The temperature of the gas phase after the Cargo Transfer is determined by calculating the arithmetic mean of all the measurements from the temperature sensors located above the liquid phase. The overall temperature measurement error, including the temperature measurement system element errors, must not exceed the values in the following table in accordance with standard ISO 8310. overall error of the measuring system Liquid phase – LNG ± 0.2 °C Gas phase ± 1.5 °C
