Manufacturer: Yokogawa Electric Corporation
Yokogawa Pressure Transmitter EJA438E
Diaphragm seal is used to prevent process medium form entering directly into the pressure-sensing assembly of the pressure transmitter, it is connected to the transmitter using capillary filled with fill fluid. EJA438E Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas, or steam pressure. EJA438E outputs a 4 to 20 mA DC signal corresponding to the measured pressure. It also features quick response, remote setup and monitoring via BRAIN or HART communications and self-diagnostics. FOUNDATION Fieldbus, PROFIBUS PA and 1 to 5 V DC with HART (Low Power) protocol types are also available. All EJA-E series models in their standard configuration, with the exception of the Fieldbus, PROFIBUS and Low Power types, are certified as complying with SIL 2 for safety requirement.
EJA438E Standard features include: ± 0.2% Accuracy 200 ms Response Time Exida and TUV SIL2 / SIL3 Certified Local Parameter Setting (LPS) 10-segment Signal Characterizer Active Capillary Fill Fluid Density Compensation
Model and Suffix Codes
Instruction The model and suffix codes for EJA438E consist of two parts; a transmitter body section (I) and a diaphragm seal section (II). This specification sheet introduces these two parts separately. The transmitter body section is shown in one table, and the diaphragm seal section specifications are listed according to the process connection style. First select the model and suffix codes of transmitter body section and then continue on one of the diaphragm seal section.
I. Transmitter body section
Model
Suffix Codes
Description
EJA438E
. . . . . . . . . . . . . . . . . . . . .
Diaphragm sealed gauge pressure transmitter
Output signal
-D . . . . . . . . . . . . . . . . . . . .
-J . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 to 20 mA DC with digital communication (BRAIN protocol)
4 to 20 mA DC with digital communication (HART 5/HART 7 protocol)*1
Digital communication (FOUNDATION Fieldbus protocol, refer to GS 01C31T02-01EN)
Digital communication (PROFIBUS PA protocol, refer to GS 01C31T04-01EN)
Low Power, 1 to 5 V DC with digital communication (HART 7 protocol)*8
Measurement span (capsule)
A . . . . . . . . . . . . .
B . . . . . . . . . . . . . . . . . .
0.06 to 3.5 MPa (8.6 to 500 psi)
0.46 to 16 MPa (67 to 2300 psi)*2
─
S . . . . . . . . . . . . . . . . .
Always S
C . . . . . . . . . . . . . . .
Always C
Coverflange bolts and nuts material
J . . . . . . . . . . . .
G. . . . . . . . . . . . .
C . . . . . . . . . . . . .
B7 carbon steel
316L SST
660 SST
Installation
-9 . . . . . . . . . . .
Horizontal piping type and left side high pressure
Amplifier housing
1 . . . . . . . . .
3 . . . . . . . . .
2 . . . . . . . . . .
Cast aluminum alloy
Cast aluminum alloy with corrosion resistance properties*3
ASTM CF-8M stainless steel*4
Electrical connection
►
0 . . . . . . .
2 . . . . . . . . . . . .
4 . . . . . . .
5 . . . . . . . . . . . .
7 . . . . . . . . . . . .
9 . . . . . . . .
A . . . . . . . . . . . .
C . . . . . . . . . . . .
D . . . . . . . . . . . .
G 1/2 female, one electrical connection without blind plugs
1/2 NPT female, two electrical connections without blin plugs
M20 female, two electrical connections without blind plugs
G 1/2 female, two electrical connections with a blind plug *5
1/2 NPT female, two electrical connections with a blind plug *5
M20 female, two electrical connections with a blind plug *5
G1/2 female, two electrical connections and a 316 SS blind plug
1/2 NPT female, two electrical connections and a 316 SST blind plug
M20 female, two electrical connections and a 316 SS blind plug
Integral indicator
D . . . . .
E . . . . .
N . . . . . .
Digital indicator*6
Digital indicator with the range setting switch (pus button)*7
None
Mounting bracket
B . . . . . .
J . . . . . .
N . . . .
304 SST 2-inch pipe mounting, flat type (for horizonta piping)
316 SST 2-inch pipe mounting, flat type (fo horizonta piping)
Diaphragm seal section
Continued on diaphragm seal section (II)
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