Products
Pressure transmitters are used to measure the pressure of liquids, gases or vapors and convert it to 4-20mA DC current signal output. Pressure transmitter can also communicate with HART275 hand manipulator, through them to set and monitor, etc.
Technical parameters of pressure transmitter
Output: 2-wire, 4-20mA DC output, digital communication, programmable linear or square root output, HART protocol loaded on the 4-20mA DC signal.
Power supply voltage: working condition: 10.5～42V DC Intrinsically safe: 10.5～30V DC
Digital communication: 16.4～42V DC Intrinsically safe model: 16.4～30V DC
Load: (When output signal code is D and E): Operating status: 0 to 1335Ω Digital communication: 250 to 600Ω
HART communication distance: When using multi-core twisted pair cable, the communication distance can be **** up to 2Km. The communication distance varies depending on the cable type. The formula is as follows: L = 65000000 / (R × C) - (C1 + 10000) / C
L=Length (m and ft)
R=impedance (Ω , including power supply impedance)
C=Cable capacitance (pF/m or pF/ft)
C1=*** Parallel capacitance (pF/m or pF/ft)
Damping time constant: The sum of the damping time constants of the amplifier parts and the cartridge. The amplifier part damping time constant is adjustable in the range of 0.2 to 64 seconds.
Ambient temperature: -40～85℃(-40～185?F) -30～80℃(-22～176?F) [with LCD meter].
Receiving temperature: -40～120℃(-40～248?F)
Product Features.
1, high accuracy, good stability, two-wire input (special can be four-wire);
2, solid components, plug-in printed circuit board; small, light weight, solid vibration resistance;
3、Range, zero external continuously adjustable; positive migration up to 500%, negative migration up to 600
4, damping can be too adjustable; one-way overload protection characteristics;
5, no mechanical moving parts, less maintenance workload; the whole series of unified structure, parts interchangeability;
6, contact media diaphragm materials can be selected; (316L, TAN, HAS-C, MONEL and other corrosion-resistant materials)
7, explosion-proof structure, all-weather use; intelligent HART field bus protocols
Technical performance and parameters
Output signal: 2-wire 4～20mA DC
2-wire 4 ~ 20mA DC signal superimposed on the digital signal (intelligent)
Power supply: 12～45VDC
Power supply impact: <0.005%/V
Load impact: no load impact when power supply is stable.
Measurement accuracy: ±0.2%, ±0.25%, ±0.5% of tuning range
(The standard accuracy is ±0.5%, if you choose other accuracy, please specify when ordering selection.)
Migration characteristics:*** Positive migration 500%.
Negative migration amount 600%
Note:
The ***value of negative migration is not greater than one engineering atmospheric pressure.
The upper or lower *** value after migration should not exceed the upper limit of the *** measurement range.
***Pressure transmitters cannot be negatively migrated.
Damping: usually adjustable between 0.2 and 1.67 seconds, the time constant will increase when filling inert liquid or with remote transmission device.
Start-up time: ﹤2 seconds, no need to warm up.
Working environment: Ambient temperature: -29～93℃ (analog amplifier)
-29～65℃ (with display meter head)
Ambient humidity: 0～95%
Protection characteristics: IP65
Explosion-proof type: explosion-proof ExdIIBT4
Intrinsically safe type ExiaIICT4
Static pressure effect: Zero error: ±0.5%*** range limit, for 32MPa in the pipeline pressure by zeroing to give correction.
Electromagnetic radiation impact: 0.05% *** range value, accept radiation frequency 27 ~ 500MHz, test field strength 3V/m.
Vibration influence: ±0.05%/g for 200Hz vibration in any direction.
Installation position: Diaphragm not installed vertically, may produce less than 0.24KPa zero error, but can be eliminated by zeroing.
