Open tank (unpressurized) measurement Regarding differential pressure level measurement, there are two main types of storage tanks: open (unpressurized) and closed (pressurized). Open, non-pressurized storage tanks are connected to the atmosphere; there is a clear path from the tank to the surrounding environment, and the air pressure acting on the liquid is equal to atmospheric […]
Differential pressure measurement of tank level Read More »
The measurement of storage tanks mainly has two purposes: to control the storage capacity of storage tanks to meet production operations such as oil collection and oil delivery; and to measure tank area inventory, that is, inventory management. The measurement methods for the two purposes are different, and the equipment and selection of instruments are
The flow signal of the electromagnetic flowmeter is based on the measured conductive liquid as the reference potential. The conductive liquid in the entire measurement pipe is regarded as a conductor with zero resistance. The two electrodes form a differential signal voltage to the conductive liquid. Therefore, if the signal contact point is unreliable, the
Grounding and liquid contact of electromagnetic flowmeter Read More »
1. Empathy – Do the right thing “The key question is to find the key to the problem.” If you want to find opportunities for process control improvement, you need to understand and care about the operators! Not only have enough respect for their operations, but also find ways to reduce their operational interference. High-frequency
How to improve the automation of installations? Read More »
1. It is forbidden to mix signal cables and power supply cables in one multi-core cable! 2. It is strictly forbidden to stick to oil when maintaining oxygen pipeline instrument equipment. Oil-free transmitters and pressure gauges are strictly forbidden to be mixed with ordinary gauges. 3. When repairing and removing wires from the instrument, you
Routine maintenance of various types of instruments Read More »
1. Sewage discharge is mainly aimed at differential pressure transmitters, pressure transmitters, float level gauges and other instruments. Since the measurement medium contains dust, oil, tiny particles, etc., which are deposited in the reverse pressure pipe (or deposited in the pressure sensing pipe), it is directly or indirect effects on measurement. The sewage discharge cycle
Meter regularly discharges sewage Read More »
The lubrication cycle should be determined according to the specific situation and mainly includes the following parts: 1. Pneumatic cam deflection valves, pneumatic ball valves, pneumatic butterfly valves, and rotating parts of electric actuators; 2. Protection box, door shaft of the insulation box, and fastening bolts of the junction box; 3. Bolts and nuts for
Instruments are regularly lubricated and protected against corrosion Read More »
1. When opening holes for instruments, avoid opening holes in formed pipes. 2. Pay attention to the length of the straight pipe section before and after the flow meter. 3. If there are electromagnetic and mass flow meters with grounding requirements, they should be grounded according to the instructions. 4. When welding process pipelines, the
Precautions during instrument installation Read More »
1. Before installing the instrument, the process pipeline should be purged to prevent ferromagnetic substances retained in the pipeline from adhering to the instrument, affecting the performance of the instrument or even damaging the instrument. If unavoidable, a magnetic filter should be installed at the inlet of the instrument. The instrument itself does not participate
Things to note before installing the instrument Read More »
Level monitoring of corrosive liquids such as acids is a challenging task among many industrial measurement scenarios. Traditional liquid level measurement technologies, such as float, pressure or capacitive sensors, are often unable to cope with high temperature and highly corrosive acidic media. The radar level gauge shows unique advantages in such an environment. Today we
Measurement advantages of radar level gauge in acidic environment Read More »
