Two-chamber balanced container and differential pressure transmitter for measuring liquid level
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After installation, how can the lowest and highest liquid levels be determined? An EJA differential pressure transmitter is used – what parameters need to be set in this transmitter?
Enter the calculated range, and then set the zero point after confirming that there is no liquid level
Generally, the upper and lower limits are determined based on the pressure tapping points at the top and bottom of the balance vessel; when calculating the range, attention must be paid to density.
It is necessary to obtain the assembly drawings of the balance vessel as well as calculations of the vapor and liquid densities of the measuring medium; if the design institute has not carried out these calculations
Fill the negative pressure tube with water, and then adjust the zero point
First, fill the negative pressure side with water; the water level should be at the same height as that of the pressure measurement tube on the negative pressure side, which is designated as the zero point. Then proceed with the transfer.
The original poster just needs to understand this
First, understand the structure of two-chamber equilibrium – there is 100% negative migration. For example, if the distance between the flanges of the cylinder is one meter, the range is pg*1 meter; after migration, the measurement range becomes -pg*1-0 kPa