Absolute pressure transmitter selection

Absolute pressure transmitter selection

Research and application of force accuracy - focus on force measurement technology.

Absolute pressure transmitter with advanced technology, sophisticated design, reliable quality, widely used in electric power, chemical, pipeline gas, steel, smelting, food processing, pharmaceutical production automation system, such as sensor core technology from Switzerland, the best solution for multi-parameter transmitter, stable quality, reliable performance.

The working principle of the absolute pressure transmitter is consistent with that of the pressure transmitter and the differential pressure transmitter. The difference between them is that the differential pressure transmitter ACTS two pressures on a detecting element (the diaphragm) at the same time and measures the difference between the two pressures. The pressure transmitter is one of the two measured pressures of the differential pressure transmitter is atmospheric pressure, that is, the difference between atmospheric pressure and the measured pressure is measured.

The absolute pressure transmitter refers to one of the two measured pressures of the differential pressure transmitter as vacuum, that is, the difference between the vacuum and the measured pressure is measured. The absolute pressure transmitter and the pressure transmitter are almost identical in structure. The difference is that the pressure transmitter has a hole a few millimeters in diameter in the position equivalent to the negative pressure chamber of the differential pressure transmitter, while the absolute pressure transmitter does not have this hole (plugged).

Absolute pressure transmitter product selection:

0-0.6 MPA

0-1.6 MPA

0-2MPA

- 0.1-0.1 MPA

0.1-0 mpa

0-10KPA

0-20KPA

0-50KPA

0-70KPA

0-100KPA

Absolute pressure transmitter parameters:

project

Technical reference number

Measuring range (not migrated)

Minimum 200Pa maximum 2000Kpa

Range than

Minimum 10:1 minimum 100:1

The environment temperature

- 40 ℃ to + 85 ℃

Medium stable

- 40 ℃ to + 125 ℃

Temperature influence

± 0.04% per 10 k; ± 0.08% / 10 k

The configuration properties

Linear/square root/free programming

The weight of the

3.3 Kg

Bus standard

4 ~ 20 ma HART

Using the object

Liquids, gases and vapors

Measuring range

0 ~ 0.1kPa to 0 ~ 40Mpa

The output signal

4 ~ 20 ma DC

Power supply

12 ~ 45VDC, generally 24V power supply

The scene shows

Pointer type 0 ~ 100% scale display, LED digital display, LCD LCD optional

Explosion-proof grade

Flameproof dIIBT4, intrinsically safe iaIICT6

precision

± 0.2%, & plusmn; 0.25%, & plusmn; 0.5%

The stability of

The absolute value of the fundamental error not exceeding the maximum range for six months

Isolation diaphragm

316 stainless steel, Hahn alloy C-276, Monel alloy or gallbladder

Signal connection

G1/2

Notes for use of absolute pressure transmitter

1. Do not apply a voltage higher than 36V to the transmitter, which may easily cause transmitter damage;

2. Do not touch the diaphragm with a hard object, which may cause damage to the isolation diaphragm;

3: The measured medium is not allowed to freeze; otherwise, the isolation diaphragm of the sensor element will be damaged and the transmitter will be damaged. If necessary, the transmitter shall be protected by temperature to prevent icing;

4: When measuring steam or other high temperature media, its temperature should not exceed the limit temperature when the transmitter is used, higher than the limit temperature used by the transmitter must use heat sink;

5: When measuring steam or other high temperature media, the heat pipe should be used to connect the transmitter with the pipe, and the pressure on the pipe should be used to transmit to the transformer. When the measured medium for water vapor, the heat pipe to inject an appropriate amount of water, in order to prevent the superheated steam directly with the transmitter contact, damage the sensor;

6: In the process of pressure transmission, attention should be paid to the following points: equipment-level pressure transmitter

A. No air leakage at the connection between the transmitter and the heat pipe;

B. Before starting to use, if the valve is closed, the valve should be opened very carefully and slowly during use, so as to avoid the diaphragm of the sensor being damaged by the direct impact of the measured medium;

C. The pipeline must be kept clear, for sediments in the pipeline will pop out and damage the sensor diaphragm.