HR-M21PT2AA2 pressure transmitter

HR-M21PT2AA2 pressure transmitterCorrect installation method:

(1) Verify the frequency response value of the pressure sensor under normal atmospheric pressure and standard temperature conditions using appropriate instruments.

(2) Verify the correctness of the coding of the pressure sensor and the corresponding frequency response signal.

In order to determine the number and specific installation position of the pressure sensor, the pressure transmitter needs to consider each inflation section of the inflation network.

(1) The pressure sensor must be installed along the cable and installed at the cable joint.

(2) Each cable should be equipped with no less than 4 pressure sensors, and the two pressure sensors near the telephone office should be no more than 200m apart

(3) Install one at the beginning and one at the end of each cable.

(4) Each cable should have one branch point installed. If two branch points are close together (less than 100 meters), only one can be installed.

(5) One cable should be installed at the location where the cable laying method (overhead, underground) changes

(6) For cables without branches, due to the consistent cable program of the base line, the installation spacing of pressure sensors should not be more than 500m, and the total number should not be less than 4.

(7) In order to facilitate the determination of the fault point of the pressure sensor, in addition to installing the pressure sensor at the starting point, an additional one needs to be installed at a distance of 150-200m from the starting point. Of course, in the design, economic and technical factors must be considered. If the pressure sensor does not need to be installed, it should not be installed.

HR-M21PT2AA2 pressure transmitterInstallation steps:

Follow the steps below to introduce process pressure into the impulse piping and transmitter:

a. Open the pressure valves on the high and low pressure sides and introduce the process fluid into the pressure measuring section.

b. Slowly open the high-pressure shut-off valve and introduce the process liquid into the pressure measuring section.

c. Close the high-pressure shut-off valve.

d. Slowly open the low-pressure shut-off valve to fill the pressure measuring section with process fluid.

e. Close the low-pressure shut-off valve.

f. Slowly open the high-pressure shut-off valve, at which point the pressure on both sides of the transmitter is equal.

g. Confirm that there are no leaks in the pressure pipe, three-way valve, transmitter, and other components.