When the pressure on both sides of the transmitter is not consistent,Differential pressure transmitterThe working principle of a differential pressure transmitter is the same as that of a differential pressure transmitter, except that the pressure in the low-pressure chamber is atmospheric pressure or vacuum.

1. The on-site environment of the equipment is relatively harsh, and strong electrical signals can generate various electromagnetic interferences. Lightning induction can produce strong surge pulses. In this situation, a difficult problem encountered in microcontroller application systems is how to reliably transmit small signals over long distances in harsh environments. Considering that the high-frequency noise of the transmitter passes through the transformer mainly not through the mutual inductance coupling of the primary and secondary coils, but through the parasitic capacitance coupling of the primary and secondary coils, a shielding layer is used to isolate the primary and secondary of the isolation transformer, reducing its distributed capacitance and improving its ability to resist common mode interference.

2. However, the price of differential pressure transmitters is greatly limited in situations where signals need to be transmitted over long distances or where there is significant interference from the power grid. The use of voltage output sensors is greatly restricted, exposing their poor anti-interference ability, line losses that damage accuracy, and other shortcomings. On the other hand, two-wire current output transmitters have been widely used due to their excellent anti-interference ability.

3. The concentration of an acid-base solution is proportional to its conductivity. Therefore, as long as the conductivity of the solution is measured, the level of acid-base concentration can be determined. When the measured solution flows into the conductivity cell, if electrode polarization and distributed capacitance are ignored, it can be equivalent to a pure resistance. When a constant voltage alternating current flows through, the output current is linearly related to the conductivity, which is proportional to the concentration of acid and alkali in the solution. Therefore, as long as the solution current is measured, the concentrations of acid, alkali, and salt can be calculated.

4. This type of malfunction requires replacement of the amplifier board. The requirements for circuit design and process assembly quality of transmitters are very strict. In actual use, for any circuit faults that occur, after inspection and confirmation, the faulty circuit board will be replaced with the manufacturer to ensure the long-term stability of the instrument and reliable price of the differential pressure transmitter.

5. The influence of installation position of micro differential pressure transmitter on zero position output. Due to its small measurement range, the self weight of the sensing element in the transmitter will affect the output of the micro differential pressure transmitter. Therefore, the zero position change that occurs during the installation of the micro differential pressure transmitter is a normal situation. During installation, the axial direction of the pressure sensitive part of the transmitter shall be perpendicular to the gravity direction. If the installation conditions are limited, the zero position of the transmitter shall be adjusted to the standard value after installation and fixation.

6. We know that regardless of the model of differential pressure transmitter, both the positive and negative pressure chambers have exhaust valves, drain valves or plugs; This provides convenience for us to calibrate the differential pressure transmitter on site, which means that the differential pressure transmitter can be calibrated without removing the pressure pipe.

7. A resistance strain gauge is a sensitive device that converts strain changes on the measured component into an electrical signal. It is one of the main components of a piezoresistive strain transmitter. The most commonly used types of resistance strain gauges are metal resistance strain gauges and semiconductor strain gauges.

There are two types of metal resistance strain gauges: wire strain gauges and metal foil strain gauges. Usually, strain gauges are tightly adhered to a mechanically strained substrate using a special adhesive. When the substrate undergoes stress changes, the resistance strain gauges also deform, causing a change in the resistance value of the strain gauges and a change in the voltage applied to the resistance