EJA438W Diaphragm Sealed Pressure Transmitter

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EJA438W diaphragm sealed pressure transmitter adopts single crystal silicon resonant sensor technolo…

Productoverview:
EJA438W diaphragm sealed pressure transmitterThe silicon resonant sensor technology.There is no lag phenomenon for silicon pressure or temperature change, is the ideal material.Silicon resonant sensor voltage, temperature change and the influence of static pressure drop as low as Zui, so as to provide long-term stability of the incomparable.
Two, compact and lightweight design:
EJA438W diaphragm sealed pressure transmitterDue to the adoption of ASIC amplifier design to make the packaging becomes small, and the miniaturization of the membrane structure and the flange of the box, this type of weight dropped to half of the original type.ASIC design not only reduces the number of parts, but also improve the reliability of the amplifier.
Third, field bus communication ability:
EJA438W diaphragm sealed pressure transmitterFieldbus is a two-way digital communication system, is the innovative technology configuration of the instrument control system, but also the prospect of upgrading good product updates, for the replacement of standard 4~20mA is widely used in analog communication instrument.
The EJA series provides a field bus mode, FOUNDATION bus voltage mode and PROFIBUS PA devices, to realize the collaborative work of Henghe motor and other suppliers.The software, EJA series uses two AI function block calculation of differential pressure and static pressure, so as to realize flexible instrument configuration.
Four, main features:
1, the world's first - silicon resonant sensor; silicon resonant sensor.
2, accuracy: + 0.075%;
5 years of continuous work without adjustment;
The temperature effect is negligible;
The static effects can be ignored.
3, one-way impact: 100 thousand consecutive overvoltage overvoltage test after one-way influence quantity less than 0.03%.
The function of two-way communication (BRAIN/HART protocol, FF bus);
To improve the self diagnosis function of small, lightweight (standard 3.9kg).
4, excellent properties of unidirectional overvoltage:
The liquid membrane and the membrane using corrugated box body processing technology of the original, so that the external pressure increases to a certain value, the film can fully contact with the body, silicone oil is transferred to the sensor pressure no longer increase with the increase of external force, so as to achieve the protective effect on sensor.
5, better long-term stability:
Long term stability.
6, flexible installation:
Without support, direct installation;
The routine use, without the three valve group.
7, simple and flexible configuration:
Through the computer or control of transmitter configuration, can also set a button and zero button on the transmitter through the range, flexible and convenient on-site adjustment of configuration.
8, static effects are neglected:
When a static pressure (pressure), resonant beam deformation two shape, size and material identical to the same, so the frequency change is consistent, so the deviation automatically cleared (figure similar formula and temperature influence).
Five, standard specification:
1, communication line:
Supply voltage: 16.4 ~ 42V DC (16.4 30V DC);
Communication distance: 2km, use the CEV cable;
The load capacitance: 0.22 F;
Load inductance: below 3.3mH;
Space and power line: more than 15cm;
The receiving instrument is connected to the receiving of resistance on the input impedance in 2.4kHz, 10K. The above ambient temperature -40 ~ 85 (-40 ~ 185 F) (general); -30 (-22 ~ 80 degrees to 176 degrees (F) with digital meter).
2, working pressure: 7kPaabs (20mmHgabs) to the flange of the rated working pressure.
Effect of 0.005%/V 3, the power supply voltage variation (21.6 ~ 32VDC, 350).
4, installation:
Transmitter: 2-inch pipeline installation;
EJA438WSeals: flange installation.
5, the installation of flange specifications:
A flange and gasket ANSI specification for contact, zigzag machining (according to ANSIB16.5)
6, waterproof structure:
JIS C0920 anti immersion type (equivalent to IECIP67 and NEMA4X)
7 transmitter material:
Fran: JISSUS14A
Flange bolt: refer to the "type and specification code table"
8, diaphragm seal material:
Capillary: JIS SUS316;
Protective tube: JIS SUS304;
PVC (Zui shield PVC use temperature: 100 degrees).
9, the damping time constant:
Time constant sum amplifier assembly and diaphragm sealing film box assembly value;
The amplifier assembly time constant: 0.2 ~ 64 seconds, can be divided into 9 segment set;
When the capillary length is 3M, the injection of code A, obtained under the normal temperature value.
Six, selection table: