For example, I want to stop the pump before the pump pressure signal and now, through the pump pressure signal, adjusting the frequency of the pump, to ensure the pump pressure at a fixed value, it will the pressure signal through the pressure transmitter is good or remote pressure gauge? Shall I use the remote pressure gauge before pumping and use the pressure transmitter after the pump? Is the electric contact pressure meter reliable?
The electric contact pressure gauge is reliable
The pressure transmitter is a little better
It's better to use the same control list, just like the accepted signal, a little simpler in programming.Which one depends on the specific situation, if the pressure changes relatively large, start frequency is relatively high, using a pressure transmitter is a little better. The reason is that the remote meter (resistance type) can not work; the contact point of the electric pressure gauge is easy to burn out. So it's better to use a pressure transmitter
The remote pressure gauge is suitable for measuring the pressure of liquid, steam and gas which can not corrode the steel and copper alloy.The instrument is provided with a slide line resistance transmitter, the measured value to the value of electricity to two meters away from the measuring point, to realize centralized monitoring and remote control, the instrument can also indicate the pressure, in order to facilitate the on-site process inspection.The meter consists of a spring tube, a pressure gauge, a slide wire, a resistance transmitter, etc..The function principle of the mechanical part of the remote pressure gauge is the same as that of the common spring tube pressure gauge.Because the resistance transmitter is arranged on the gear drive, so when the fan gear shaft gear transmission mechanism of deflection, rotating arm resistance transmitter (brush) corresponding to the deflection due to sliding on the resistor, brush, change make the changes in the measured value of pressure change as the resistance value, and to the two instrument, indicating a corresponding reading value. At the same time, the primary instrument also indicates the corresponding pressure value.Two kinds of pressure transmitter pressure of the measured medium into high and low pressure chamber two, role in the delta element (i.e. sensitive element) on both sides of the diaphragm, by filling liquid on both sides is transmitted to the measuring diaphragm and the element in isolation. Measure the electrodes on the diaphragm and the insulation plate on both sides to form a 4-20mA standard signal output by the capacitor and send it to the program control system.
