<<Contents>> <<Index>>

General Model EJA438W and EJA438N

Specifications Diaphragm Sealed Gauge
Pressure Transmitters
GS 01C22J03-00E [Style: S2]

Diaphragm seal is used to prevent process medium from

entering directly into the pressure-sensing assembly of the
pressure transmitter. It is connected to the transmitter using
capillary filled with fill fluid.
Models EJA438W and EJA438N Diaphragm Sealed Gauge
Pressure Transmitters can be used to measure liquid, gas or
steam pressure. They output a 4 to 20 mA DC signal
corresponding to the measured pressure.
The models EJA438W and EJA438N feature remote setup
and monitoring through communications with the model
BT200/100 BRAIN TERMINAL, CENTUM CS/XL system
etc.

■ STANDARD SPECIFICATIONS
Refer to GS 01C22T02-00E for FOUNDATION Fieldbus
communication type and GS 01C22T03-00E for Load capacitance; 0.22 µF or less.
PROFIBUS PA communication type marked with “
.” Load inductance; 3.3 mH or less.
Measurement Ranges : Spacing from power line; 15 cm or more.
Input impedance of receiver connected receiving resistance;
Measurement 10 k
or more at 2.4 kHz
Capsule Measurement Span Range (See Optional Specifications for Intrinsically safe type)
A *1 0.06 to 3 MPa -0.1 to 3 MPa Accuracy:
{0.6 to 30 kgf/cm2} {-1 to 30 kgf/cm2} See Table 2.
0.46 to 14 MPa -0.1 to 14 MPa Ambient Temperature Limits:
EJA438W *1
{4.6 to 140 kgf/cm2} {-1 to 140 kgf/cm2} -40 to 60 ˚C (-40 to 140 ˚F) (general-use type)
B
0.46 to 7 MPa -0.1 to 7 MPa -30 to 60 ˚C (-22 to 140 ˚F) (with integral indicator)
EJA438N *1
{4.6 to 70 kgf/cm2} {-1 to 70 kgf/cm2} (Note: The ambient temperature limits must be within the fill
T01E.EPS
fluid operating temperature range, see table 1.)
*1: Measurement range is within the flange rating. (See ‘Optional Specifications’ for Explosion-protected
types)
Output Signal “
”:
4 to 20 mA DC, 2-wire system with digital communication Ambient Temperature Effect:
See Table 2.
Failure Alarm:
Output status at CPU failure and hardware error; Process Temperature Limits:
Up-scale: 110%, 21.6 mA DC or more(standard) See Table 1.
Down-scale: -5%, 3.2 mA DC or less (See ‘Optional Specifications’ for Explosion-protected
-2.5%, 3.6 mA DC or less (Optional code /F1) types)
Note: Applicable for Output signal code D and E Ambient Humidity Limits:
Supply Voltage “
”: 5 to 100 % R.H.(at 40 ˚C)
10.5 to 42 V DC for general use and flameproof type Working Pressure Limits:
10.5 to 32 V DC for lightning protector (Optional code /A) 2.7 kPa abs{20 mmHg abs}to max. measurement
10.5 to 30 V DC for intrinsically safe, Type n, rangevalue.
nonincendive, or non-sparking type (Note: The working pressure must be within flange rating
10.5 to 28 V DC for TIIS intrinsically safe type pressure.)
Conditions of Communication Line “
”: For atmospheric pressure or below, see Figure 2.
Power supply voltage; Power Supply Effect “
”:
16.4 to 42 V DC 0.005 %/V (21.6 to 32 V DC, 350
)
Load resistance; See Figure 1.
Note: In case of an intrinsically safe transmitter, external
Mounting:
load resistance includes safety barrier resistance. Transmitter; 2-inch pipe mounting
Communication distance; Diaphragm seal; flange mounting
2 km, when CEV polyethylene-insulated Mounting Flange Rating:
PVC-sheathed control cables are used. See ‘Model and Suffix Codes.’
Note: Communication distance varies depends on kind of Flange conforming to ANSI are serrated on the gasket
cable. surfaces (ANSI B16.5)
Note: For model EJA438W wetted parts material code H, T,
or U, no serration is worked.

Yokogawa Electric Corporation GS 01C22J03-00E

2-9-32 Nakacho, Musashino-shi, Tokyo, 180-8750 Japan ©Copyright July 1994
Phone: 81-422-52-5690 Fax: 81-422-52-2018 31st Edition April 2013
<<Contents>> <<Index>> 2
Degrees of Protection: Capsule A B
IP67, NEMA4X Time Constant Approx. Approx.
Explosion-protected Construction: (sec) 0.2 0.2
See ‘Optional Specification.’ T02E.EPS

Electrical Connection: Approximate values obtained at normal temperature when

See ‘Model and Suffix Codes.’ the capillary length is 5 m, process flange size/material
Amplifier Housing: code A, B, C and the fill fluid code is A.
Cast aluminum alloy or JIS SCS14A stainless steel External Zero Adjustment “
”:
(optional) Continuously adjustable Resolution; 0.01 % of span
Painting: Zero Adjustment Limits:
Polyurethance resin baked finish Zero can be fully elevated or suppressed as long as low
Deep sea moss green (Munsell 0.6GY3.1/2.0) and high range values are within the measurement range
Integral Indicator: low and high limits of the capsule.
LCD digital indicator (optional) Tag Plate:
Transmitter Material: JIS SUS304 or SUS316
Cover flange; JIS SCS14A Weight:
Cover flange bolts; See ‘Model and Suffix Codes.’ 8.3 kg (18.3 lb) Model EJA438W with 50 mm JIS 10K
Diaphragm Seal Material: flange, capillary length 5 m; with integral indicator and
Diaphragm and other wetted parts; mounting bracket.
See ‘Model and Suffix Codes.’ 13.4 kg (29.6 lb) Model EJA438N with 100 mm JIS 10K
Capillary tube; JIS SUS316 flange, X2=100, capillary length 5 m; with integral
Protection tube; JIS SUS304 indicator and mounting bracket.
PVC-sheathed (Max. operating temperature of PVC, Add 1.4 kg (3.1 lb) for JIS SCS14A stainless steel
100 ˚C (212 ˚F)) amplifier housing.
Fill fluid; See Table 1. EMC Conformity Standards “
”: ,
Damping Time Constant: EN61326-1 Class A, Table2 (For use in industrial locations)
(Sum of time constants for amplifier assembly and capsule EN61326-2-3
assembly with diaphragm seal) European Pressure Equipment Directive 97/23/EC:
Amplifier assembly time constant;
Sound Engineering Practice
Can be set in 9 increments from 0.2 to 64 sec.
Capsule assembly time constant; Safety Requirement Standards:
EN61010-1
• Altitude of installation site: Max. 2,000 m above sea level
• Installation category: I
• Pollution degree: 2
• Indoor/Outdoor use
< Settings When Shipped > “
”
Tag Number As specified in order *1 Calibration Range
Lower Range Value As specified in order
Output Mode ‘Linear’
Calibration Range As specified in order
Display Mode ‘Linear’ Higher Range Value
Operation Mode ‘Normal’ unless otherwise specified in order Selected from mmH2O, mmAq, mmWG,
Calibration Range mmHg, Pa, hPa, kPa, MPa, mbar, bar,
Damping Time ‘2 sec.’ Units gf/cm2, kgf/cm2, inH2O, inHg, ftH2O, or psi.
Constant (Only one unit can be specified)
T05E.EPS
*1: Up to 16 alphanumeric characters (including - and · ) will be entered in the amplifier memory.

Table 1. Process Temperature and Ambient Temperature

Silicone Oil Fluorinated Oil Ethylene Glycol
Fill Fluid Fill Fluid Fill Fluid Fill Fluid Fill Fluid
Code ‘A’ Code ‘B’ Code ‘C’ Code ‘D’ Code ‘E’
Process Temperature *1 -10 to 250 C -30 to 180 C 10 to 300 C -20 to 120 C -50 to 100 C
( 14 to 482 F ) ( -22 to 356 F ) ( 50 to 572 F ) ( -4 to 248 F ) ( -58 to 212 F )
-10 to 60 C -15 to 60 C 10 to 60 C -10 to 60 C -40 to 60 C
Ambient temperature *2 ( 14 to 140 F ) ( 5 to 140 F ) ( 50 to 140 F ) ( 14 to 140 F ) ( -40 to 140 F )
51 kPa abs or more Vacuum pressure
Working pressure See Figure 2 {380 mmHg abs} not allowed
Specific gravity *3
1.07 0.94 1.09 1.90 to 1.92 1.09
T06E.EPS
*1: See Figure 2 ‘Working Pressure and Process Temperature.’
*2: This ambient temperature is the transmitter ambient temperature.
*3: Approximate values at a temperature of 25 C (77 F)
*4: The pressure transmitter should be installed at least 700 mm below the process connection. However, this value (700 mm) may be
affected by ambient temperature, operating pressure, fill fluid or material of the wetted diaphragm.
Contact YOKOGAWA when the transmitter can not be installed at least 700 mm below the process connection.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E April 01, 2013-00
<<Contents>> <<Index>> 3

Process temperature Process temperature

for fill fluid code B for fill fluid code C
600 Process temperature
E-10.5 Transmitter ambient for fill fluid code A Flange max.
R= Digital temperature range
External 0.0236 working
load Communication (For fill fluid code pressure
resistance range A, B)
BRAIN and HART
250
R (
)
100 {750} Atmospheric
Working pressure
pressure
10.5 16.4 24.7 42 kPa abs
Power supply voltage E (V DC) {mmHg abs}
F001E.EPS
10 {75}
Figure 1. Relationship Between Power Supply
Voltage and External Load Resistance
2.7 {20}

1 {7.5}

0.1 {0.75}
-50 0 50 100 150 200 250 300
Process Temperature (C) F02E.EPS

Figure 2. Woirking Pressure and Process Temperature

Table 2. Accuracy and Ambient Temperature Effect (As percent of ‘x’) *1

A, B A, B
Capsule (For wetted parts material code S) (For wetted parts material code H, T, and U)

± 0.2 % For x ≥ Pref ± 0.2 % For x ≥ Pref

Accuracy Pref Pref
± (0.15 + 0.05  x ) % For x < Pref ± (0.15 + 0.05  x ) % For x < Pref

Pref Pref
Zero shift ± (0.2 + 0.5  x ) % / 50 C ± (0.3 + 0.6  x ) % / 50 C
Ambient
temperature
effect *2 ± 1.4 % / 50 C For x ≥ Pref ± 1.6 % / 50 C For x ≥ Pref
Total shift Pref Pref
± (0.7 + 0.7  x ) % / 50 C For x < Pref ± (0.8 + 0.8  x ) % / 50 C For x < Pref

T07E.EPS
*1: ‘x’ is the highest value among the absolute value of the lower range value (LRV) and higher range value (HRV), and the span value in
a calibration range.
Percent of span = Percent of x 
x
span
*2: In case of 6 to 10 m. for capillary length, value of ambient temperature effect is twice that given in the table.
The ambient temperature effect specification applies to the range of 0 to 60 C (32 to140 F).
(Below 0 C (32 F), value is three times that given in the table.)

Table 3. Value of ‘Pref’

Capsule Pref
A 0.3 MPa {3 kgf/cm2}
B 1.4 MPa {14 kgf/cm2}
T008E.EPS

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Mar. 23, 2006-00
<<Contents>> <<Index>> 4
■ MODEL AND SUFFIX CODES
● Model EJA438W [Flange size: 2-inch (50 mm) and 3-inch (80 mm)]
Model Suffix Codes Description
EJA438W .................................. Diaphragm Sealed Gauge Pressure transmitter (Flush diaphragm type)
Output Signal -D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 20 mA DC with digital communication (BRAIN protocol)
-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 20 mA DC with digital communication (HART protocol) *1
-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital communication (FOUNDATION Fieldbus protocol) *6
-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital communication (PROFIBUS PA protocol) *10
Measurement span A............................. 0.06 to 3 MPa {0.6 to 30 kgf/cm2}{8.6 to 430 psi}{0.6 to 30 bar}
(capsule) B............................. 0.46 to 14 MPa {4.6 to 140 kgf/cm2}{66 to 2000 psi}{4.6 to 140 bar}
Wetted parts material *8 [Diaphragm] [Others]
S# . . . . . . . . . . . . . . . . . . . . . . . . . . . . JIS SUS316L JIS SUS316L *11
H# . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hastelloy C-276 *9 Hastelloy C-276 *9
T............................ Tantalum Tantalum
U............................ Titanium Titanium
Process flange rating J1 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 10K
J2 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 20K
J4 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 40K
J6 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 63K
A1 . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Class 150 P1 . . . . . . . . . JPI Class 150
A2 . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Class 300 P2 . . . . . . . . . JPI Class 300
A4 . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Class 600 P4 . . . . . . . . . JPI Class 600
D2 . . . . . . . . . . . . . . . . . . . . . . . . . . DIN PN10/16
D4 . . . . . . . . . . . . . . . . . . . . . . . . . . DIN PN25/40
D5 . . . . . . . . . . . . . . . . . . . . . . . . . . DIN PN64
Process flange  A......................... 2-inch (50 mm) / JIS S25C
size / material B......................... 2-inch (50 mm) / JIS SUS304 *12
C......................... 2-inch (50 mm) / JIS SUS316 *13
D......................... 3-inch (80 mm) / JIS S25C
E......................... 3-inch (80 mm) / JIS SUS304 *12
F......................... 3-inch (80 mm) / JIS SUS316 *13
Cover flange bolts material  A....................... JIS SCM435
B....................... JIS SUS630
Fill fluid [Process temp.] [Ambient temp.]
 -A *2 . . . . . . . . . . . . . . . . . For general use (silicone oil) -10 to 250 C -10 to 60 C
-B . . . . . . . . . . . . . . . . . For general use (silicone oil) -30 to 180 C -15 to 60 C
-C *3. . . . . . . . . . . . . . . . . . . For high temperature use (silicone oil) 10 to 300 C 10 to 60 C
-D *4 . . . . . . . . . . . . . . . . . For oil-prohibited use (fluorinated oil) -20 to 120 C -10 to 60 C
-E . . . . . . . . . . . . . . . . . . . For low temperature use (ethylene glycol) -50 to 100 C -40 to 60 C
A ................. Always A
Capillary length (m)   *5 . . . . . . . . . . . . Specify capillary length from 1 to 10 m in  . (Example for 2 m : 02)
Installation -9 . . . . . . . . . . . . . .Horizontal impulse piping type, left side high pressure
Electrical connection 0............. G1/2 female, one electrical connection
 2............. 1/2 NPT female, two electrical connections without blind plug
3............. Pg 13.5 female, two electrical connections without blind plug
4............. M20 female, two electrical connections without blind plug
5............. G1/2 female, two electrical connections and a blind plug
7............. 1/2 NPT female, two electrical connections and a blind plug
8............. Pg 13.5 female, two electrical connections and a blind plug
9............. M20 female, two electrical connections and a blind plug
A............. G1/2 female, two electrical connections and a SUS316 blind plug
C............. 1/2 NPT female, two electrical connections and a SUS316 blind plug
D............. M20 female, two electrical connections and a SUS316 blind plug
Integral indicator D.......... Digital indicator
E.......... Digital indicator with the range setting switch *7
 N.......... (None)
Mounting bracket  A......... JIS SECC 2-inch pipe mounting (flat type)
B......... JIS SUS304 2-inch pipe mounting (flat type)
J......... JIS SUS316 2-inch pipe mounting (flat type)
N......... (None)
Optional codes / Optional specification
T09E.EPS
The ‘’ marks indicate the most typical selection for each specification. Example: EJA438W-DASA1AA-AA02-92NA/
The ‘#’marks indicate the construction materials conform to NACE material recommendations per MR01-75. For the use of
SUS316 material, there may be certain limitations for pressure and temperature. Please refer to NACE standards for details.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Jul. 08, 2009-00
<<Contents>> <<Index>> 5
*1: Refer to GS 01C22T01-00E for HART Protocol version.
*2: In case of Wetted parts material code T (Tantalum), the process temperature limit is -10 to 200 C.
*3: Wetted parts material code T (Tantalum) cannot be applied.
*4: Even in case where Fill fluid code D (fluorinated oil) is selected, if degrease cleansing treatment or both degrease cleansing and
dehydrating treatment for the wetted parts is required, specify Optional code K1 or K5.
*5: In case of Wetted parts material code H (Hastelloy C), T (Tantalum), and U (Titanium) or Fill fluid code C (for high temperature
use), specify capillary length from 1 to 5 m.
*6: Refer to GS 01C22T02-00E for Fieldbus communication.
*7: Not applicable for Output signal code F and G.
*8: Users must consider the characteristics of selected wetted parts material and the influence of process fluids. The use of
inappropriate materials can result in the leakage of corrosive process fluids and cause injury to personnel and/or damage to
plant facilities. It is also possible that the diaphragm itself can be damaged and that material from the broken diaphragm and the
fill fluid can contaminate the user's process fluids.
Be very careful with highly corrosive process fluids such as hydrochloric acid, sulfuric acid, hydrogen sulfide, sodium
hypochlorite, and high-temperature steam (150°C [302°F] or above). Contact Yokogawa for detailed information of the wetted
parts material.
*9: Hastelloy C-276 or ASTM N10276.
*10: Refer to GS 01C22T03-00E for PROFIBUS PA communication.
*11: JIS SUS316L or ASTM grade 316L.
*12: JIS SUS304 or ASTM grade 304. Forged version may be used.
*13: JIS SUS316 or ASTM grade 316. Forged version may be used.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Jul. 08, 2009-00
<<Contents>> <<Index>> 6
● Model EJA438N [Flange size: 4-inch (100 mm)]

Model Suffix Codes Description

EJA438N .................................. Diaphragm sealed gauge pressure transmitter (Extended diaphragm type)
Output Signal -D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 20 mA DC with digital communication (BRAIN protocol)
-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 20 mA DC with digital communication (HART protocol) *1
-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital communication (FOUNDATION Fieldbus protocol) *4
-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital communication (PROFIBUS PA protocol) *8
Measurement span A............................. 0.06 to 3 MPa {0.6 to 30 kgf/cm2}{8.6 to 430 psi}{0.6 to 30 bar}
(capsule) B............................. 0.46 to 7 MPa {4.6 to 70 kgf/cm2}{66 to 1000 psi}{4.6 to 70 bar}
Wetted parts material *7 [Diaphragm] [Pipe] [Others]
S# . . . . . . . . . . . . . . . . . . . . . . . . . . . . JIS SUS316L JIS SUS316 JIS SUS316 *9
Flange rating J1 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 10K
J2 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 20K
J4 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 40K
A1 . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Class 150 P1 . . . . . . . . JPI Class 150
A2 . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Class 300 P2 . . . . . . . . JPI Class 300
D2 . . . . . . . . . . . . . . . . . . . . . . . . . . DIN PN10/16
D4 . . . . . . . . . . . . . . . . . . . . . . . . . . DIN PN25/40
2......................... X2 = 50 mm
4......................... X2 = 100 mm
Diaphragm extension length 6......................... X2 = 150 mm
 G...................... 4-inch (100 mm) / JIS S25C
H...................... 4-inch (100 mm) / JIS SUS304 *10
Process flange J...................... 4-inch (100 mm) / JIS SUS316 *11
size / material  A.................... JIS SCM435
B.................... JIS SUS630
Cover flange bolts material [Process tempe.] [Ambient tempe.]
 -A . . . . . . . . . . . . . . . . . . For general use (silicone oil) -10 to 250 C -10 to 60 C
Fill fluid -B . . . . . . . . . . . . . . . . . . For general use (silicone oil) -30 to 180 C -15 to 60 C
-C . . . . . . . . . . . . . . . . . . For high temperature use (silicone oil) 10 to 300 C 10 to 60 C
-D *2 . . . . . . . . . . . . . . . . For oil-prohibited use (fluorinated oil) -20 to 120 C -10 to 60 C
-E . . . . . . . . . . . . . . . . . . For low temperature use (ethylene glycol) -50 to 100 C -40 to 60 C
B................. Always B
 . . . . . . . . . . . . . Specify capillary length from 1 to 10 m in  . (Example for 2 m : 02)
-9 . . . . . . . . . . . . Horizontal impulse piping type, left side high pressure
Capillary length (m) *3 *5 0............ G1/2 female, one electrical connection
Installation  2............ 1/2 NPT female, two electrical connections without blind plug
Electrical connection 3............ Pg 13.5 female, two electrical connections without blind plug
4............ M20 female, two electrical connections without blind plug
5............ G1/2 female, two electrical connections and a blind plug
7............ 1/2 NPT female, two electrical connections and a blind plug
8............ Pg 13.5 female, two electrical connections and a blind plug
9............ M20 female, two electrical connections and a blind plug
A............ G1/2 female, two electrical connections and a SUS316 blind plug
C............ 1/2 NPT female, two electrical connections and a SUS316 blind plug
D............ M20 female, two electrical connections and a SUS316 blind plug
Integral indicator D ......... Digital indicator
E ......... Digital indicator with the range setting switch *6
 N ......... (None)
Mounting bracket  A........ JIS SECC 2-inch pipe mounting (flat type)
B........ JIS SUS304 2-inch pipe mounting (flat type)
J........ JIS SUS316 2-inch pipe mounting (flat type)
N........ (None)
Optional codes / Optional specification
T10E.EPS
The ‘’ marks indicate the most typical selection for each specification. Example: EJA438N-DASA12GA-AB02-92NA/
*1: Refer to GS 01C22T01-00E for HART Protocol version.
*2: Even in case where Fill fluid code D (fluorinated oil) is selected, if degrease cleansing treatment or both degrease cleansing and dehydrating treatment
for the wetted parts is required, specify Optional code K1 or K5.
*3: In case of Fill fluid code C (for high temperature use), specify capillary length from 1 to 5 m.
*4: Refer to GS 01C22T02-00E for Fieldbus communication.
*5: The specified capillary length includes the diaphragm extension length(X2) and the flange thickness(t).
*6: Not applicable for Output signal code F and G.
*7: Users must consider the characteristics of selected wetted parts material and the influence of process fluids. The use of inappropriate materials
can result in the leakage of corrosive process fluids and cause injury to personnel and/or damage to plant facilities. It is also possible that the
diaphragm itself can be damaged and that material from the broken diaphragm and the fill fluid can contaminate the user's process fluids.
Be very careful with highly corrosive process fluids such as hydrochloric acid, sulfuric acid, hydrogen sulfide, sodium hypochlorite, and high-
temperature steam (150°C [302°F] or above). Contact Yokogawa for detailed information of the wetted parts material.
*8: Refer to GS 01C22T03-00E for PROFIBUS PA communication.
*9: JIS SUS316 or ASTM grade 316.
*10 JIS SUS304 or ASTM grade 304. Forged version may be used.
*11: JIS SUS316 or ASTM grade 316. Forged version may be used.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Jul. 08, 2009-00
<<Contents>> <<Index>> 7
● Model EJA438N [Flange size: 3-inch (80mm)]

Model Suffix Codes Description

EJA438N .................................. Diaphragm sealed gauge pressure transmitter (Extended diaphragm type)
Output Signal -D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 20 mA DC with digital communication (BRAIN protocol)
-E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 20 mA DC with digital communication (HART protocol) *1
-F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital communication (FOUNDATION Fieldbus protocol) *2
-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital communication (PROFIBUS PA protocol) *6
Measurement span 2
A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.06 to 3 MPa {0.6 to 30 kgf/cm }{8.6 to 430 psi}{0.6 to 30 bar}
(capsule) 0.46 to 7 MPa {4.6 to 70 kgf/cm 2}{66 to 1000 psi}{4.6 to 70 bar}
B..............................
Wetted parts material *5 [Diaphragm] [Pipe] [Others]
S# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JIS SUS316L JIS SUS316 JIS SUS316 *7
Flange rating J1 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 10K
J2 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 20K
J4 . . . . . . . . . . . . . . . . . . . . . . . . . . JIS 40K
A1 . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Class 150 P1 . . . . . . . . JPI Class 150
A2 . . . . . . . . . . . . . . . . . . . . . . . . . . ANSI Class 300 P2 . . . . . . . . JPI Class 300
D2 . . . . . . . . . . . . . . . . . . . . . . . . . . DIN PN10/16
D4 . . . . . . . . . . . . . . . . . . . . . . . . . . DIN PN25/40
2......................... X2 =50 mm
4......................... X2 =100 mm
Diaphragm extension length 6......................... X2 =150 mm
 D . . . . . . . . . . . . . . . . . . . . . . . 3-inch (80 mm) / JIS S25C
E . . . . . . . . . . . . . . . . . . . . . . . 3-inch (80 mm) / JIS SUS304 *8
Process flange size / material F . . . . . . . . . . . . . . . . . . . . . . . 3-inch (80 mm) / JIS SUS316 *9
 A . . . . . . . . . . . . . . . . . . . . . JIS SCM435
B . . . . . . . . . . . . . . . . . . . . . JIS SUS630
Cover flange bolts material [Process temp.] [Ambient temp.]

 -A . . . . . . . . . . . . . . . . . For general use (silicone oil) -10 to 250 C -10 to 60 C

Fill fluid -B . . . . . . . . . . . . . . . . . For general use (silicone oil) -30 to 180 C -15 to 60 C
B . . . . . . . . . . . . . . . . . Always B
 ............ Specify capillary length from 1 to 5 m in  . (Example for 2 m : 02)
-9 . . . . . . . . . . . . Horizontal impulse piping type, left side high pressure
Capillary length (m) *3 0........... G1/2 female, one electrical connection
Installation  2........... 1/2 NPT female, two electrical connections without blind plug
Electrical connection 3........... Pg 13.5 female, two electrical connections without blind plug
4........... M20 female, two electrical connections without blind plug
5........... G1/2 female, two electrical connections and a blind plug
7........... 1/2 NPT female, two electrical connections and a blind plug
8........... Pg 13.5 female, two electrical connections and a blind plug
9........... M20 female, two electrical connections and a blind plug
A........... G1/2 female, two electrical connections and a SUS316 blind plug
C........... 1/2 NPT female, two electrical connections and a SUS316 blind plug
D........... M20 female, two electrical connections and a SUS316 blind plug
Integral indicator D . . . . . . . . . . Digital indicator
E . . . . . . . . . . Digital indicator with the range setting switch *4
 N . . . . . . . . . . (None)
Mounting bracket  A . . . . . . . . JIS SECC 2-inch pipe mounting (flat type)
B . . . . . . . . JIS SUS304 2-inch pipe mounting (flat type)
J . . . . . . . . JIS SUS316 2-inch pipe mounting (flat type)
N . . . . . . . . (None)
Optional codes / Optional specification
T11E.EPS
The ‘’ marks indicate the most typical selection for each specification.Example: EJA438N-DASA12DA-AB02-92NA/

*1: Refer to GS 01C22T01-00E for HART Protocol version.

*2: Refer to GS 01C22T02-00E for Fieldbus communication.
*3: The specified capillary length includes the diaphragm extension length(X2) and the flange thickness(t).
*4: Not applicable for Output signal code F and G.
*5: Users must consider the characteristics of selected wetted parts material and the influence of process fluids. The use of inappropriate materials
can result in the leakage of corrosive process fluids and cause injury to personnel and/or damage to plant facilities. It is also possible that the
diaphragm itself can be damaged and that material from the broken diaphragm and the fill fluid can contaminate the user's process fluids.
Be very careful with highly corrosive process fluids such as hydrochloric acid, sulfuric acid, hydrogen sulfide, sodium hypochlorite, and high-
temperature steam (150°C [302°F] or above). Contact Yokogawa for detailed information of the wetted parts material.
*6: Refer to GS 01C22T03-00E for PROFIBUS PA communication.
*7: JIS SUS316 or ASTM grade 316.
*8 JIS SUS304 or ASTM grade 304. Forged version may be used.
*9: JIS SUS316 or ASTM grade 316. Forged version may be used.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Jul. 08, 2009-00
<<Contents>> <<Index>> 8
■ OPTIONAL SPECIFICATIONS (For Explosion Protected Types “
”)
For FOUNDATION Fieldbus explosion protected type, see GS 01C22T02-00E.
For PROFIBUS PA explosion protected type, see GS 01C22T03-00E.

Item Description Code

FM Explosionproof Approval *1 *3 *4
Applicable standard: FM3600, FM3615, FM3810, ANSI/NEMA250
Explosionproof for Class I, Division 1, Groups B, C and D
Dust-ignitionproof for Class II/III, Division 1, Groups E, F and G
FF1
Hazardous (classified) locations, indoors and outdoors (NEMA 4X)
Division 2, 'SEALS NOT REQUIRED',
Temp. Class: T6
Amb. Temp.: –40 to 60C (–40 to 140F)
FM Intrinsically safe Approval *1 *3 *4
Applicable standard: FM3600, FM3610, FM3611, FM3810, ANSI/NEMA250
Factory Mutual (FM) Intrinsically Safe for Class I, Division 1, Groups A, B, C & D, Class II, Division 1,
Groups E, F & G and Class III, Division 1 Hazardous Locations.
Nonincendive for Class I, Division 2, Groups A, B, C & D, Class II, Division. 2,
Groups E, F & G, and Class III, Division 1 Hazardous Locations.
FS1
Enclosure: “NEMA 4X”, Temp. Class: T4, Amb. Temp.: –40 to 60C (–40 to 140F)
Intrinsically Safe Apparatus Parameters
[Groups A, B, C, D, E, F and G]
Vmax=30 V, Imax=165 mA, Pmax=0.9 W, Ci=22.5 nF, Li=730 H
[Groups C, D, E, F and G]
Vmax=30 V, Imax=225 mA, Pmax=0.9 W, Ci=22.5 nF, Li=730 H
Combined FF1 and FS1 *1 *3 *4 FU1
ATEX Flameproof Approval *2 *4
Applicable standard: EN 60079-0, EN 60079-1
Certificate: KEMA 02ATEX2148
II 2G Ex d IIC T4, T5, T6 KF21
Amb. Temp.: T5; –40 to 80C ( –40 to 176F), T4 and T6; –40 to 75C ( –40 to 167F)
Max. process Temp.: T4; 120C (248F), T5; 100C (212F), T6; 85C (185F)
ATEX
ATEX Intrinsically safe Approval *2 *3 *4
Applicable standard: EN50014, EN50020, EN500284, EN50281-1-1
Certificate: KEMA 02ATEX1030X KS2
II 1G EEx ia IIC T4, Amb. Temp.: –40 to 60C (–40 to 140F)
Ui=30 V, Ii=165 mA, Pi=0.9 W, Ci=22.5 nF, Li=730 H
T14E.EPS
*1: Applicable for Electrical connection code 2, 7 and C (1/2 NPT female).
*2: Applicable for Electrical connection code 2, 4, 7, 9, C and D (1/2 NPT and M20 female).
*3: Applicable for Output signal code D and E. For intrinsically safe approval, use the safety barrier certified by the testing laboratories
(BARD-400 is not applicable).
*4: Lower limit of ambient temperature is –15˚C (5˚F) when /HE is specified.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E April 01, 2013-00
<<Contents>> <<Index>> 9
Item Description Code
CSA Explosionproof Approval *1 *3 *4
Applicable standard: C22.2 No. 0, No. 0.4, No. 25, No. 30, No. 94, No. 142
Certificate: 1089598
Explosionproof for Class I, Division 1, Groups B, C and D
Dustignitionproof for Class II/III, Division 1, Groups E, F and G
Division2 ‘SEALS NOT REQUIRED’ , Temp. Class: T4, T5, T6 Encl Type 4x CF1
Max. Process Temp.: T4; 120C (248F), T5; 100C (212F), T6; 85C (185F)
Amb. Temp.: –40 to 80C (–40 to 176F)
Process Sealing Certification
Dual Seal Certified by CSA to the requirement of ANSI/ISA 12.27.01
Canadian Standards No additional sealing required. Primary seal failure annunciation: at the zero adjustment screw
Association (CSA)
CSA Intrinsically safe Approval *1 *3 *4
Applicable standard: C22.2 No. 0, No. 0.4, No. 25, No. 30, No. 94, No. 142, No. 157, No. 213
Certificate: 1053843
Class I, Groups A, B, C and D Class II and III, Groups E, F and G
Encl Type 4x, Temp. Class: T4, Amb. Temp.: –40 to 60C (–40 to 140F) CS1
Vmax=30 V, Imax=165 mA, Pmax=0.9 W, Ci=22.5 nF, Li=730 H
Process Sealing Certification
Dual Seal Certified by CSA to the requirement of ANSI/ISA 12.27.01
No additional sealing required. Primary seal failure annunciation: at the zero adjustment screw
Combined CF1 and CS1 *1 *3 *4 CU1
IECEx Intrinsically safe, type n and Flameproof Approval *3 *4 *9
Intrinsically safe and type n
Applicable Standard: IEC 60079-0:2004, IEC 60079-11:1999, IEC 60079-15:2005,
IEC 60079-26:2005
Certificate: IECEx KEM 06.0007X
Ex ia IIC T4, Ex nL IIC T4 Enclosure: IP67
Amb. Temp.: –40 to 60C (–40 to 140F), Max. Process Temp.: 120C (248F)
IECEx Electrical Parameters: [Ex ia] Ui=30 V, Ii=165 mA, Pi=0.9 W, Ci=22.5 nF, Li=730 H
SU2
[Ex nL] Ui=30 V, Ci=22.5 nF, Li=730 H
Flameproof
Applicable Standard: IEC 60079-0:2004, IEC60079-1:2003
Certificate: IECEx KEM 06.0005
Ex d IIC T6...T4 Enclosure: IP67
Max.Process Temp.: T4;120C (248F), T5;100C (212F), T6; 85C (185F)
Amb.Temp.: –40 to 75C (–40 to 167F) for T4, –40 to 80C (–40 to 176F) for T5,
–40 to 75C (–40 to 167F) for T6
TIIS Flameproof Approval, Ex do IIC T4X *3 *5 *7 *8 *10
Certificate: TC15296 (Without integral indicator)
JF3
TC15297 (With integral indicator)
TIIS certification Amb. Temp.: –20 to 60C, Process Temp.: –20 to 120C
TIIS Intrinsically safe Approval, Ex ia IIC T4 *6 *8
Certificate: TC14632 JS3
Amb. Temp.: –20 to 60C, Process Temp.: –20 to 120C
Attached flameproof Electrical connection: G1/2 female 1 pc. G11
packing adapter *5 Applicable cable: O. D. 8 to 12 mm 2 pcs. G12
T16E.EPS
*1: Applicable for Electrical connection code 2, 7 and C (1/2 NPT female).
*2: Applicable for Electrical connection code 2, 4, 7, 9, C and D (1/2 NPT and M20 female).
*3: Applicable for Output signal code D and E. For intrinsically safe approval, use the safety barrier certified by the testing laboratories
(BARD-400 is not applicable).
*4: Lower limit of ambient temperature is –15˚C (5˚F) when /HE is specified.
*5: If cable wiring is to be used to a TIIS flameproof type transmitter, add the YOKOGAWA-assured flameproof packing adapter.
*6: Applicable for Output signal code D. See <Safety Barrier for TIIS Intrinsically Safe Type>.
*7: In case that the ambient temperature exceeds 50°C or that the ambient temperature exceeds 45°C with the process temperature of
90°C or above, use heat-resistant cables with maximum allowable temperature of 75°C or above.
*8: TIIS (The Technology Institution of Industrial Safety) Certification is a new notation for the explosionproof approval in Japan
instead of JIS.
*9: Applicable for Electrical connection code 2, 4, 7, C and D (1/2 NPT and M20 female).
*10: Not applicable for Electrical connection code A, C and D.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E April 23, 2012-00
<<Contents>> <<Index>> 10
■ OPTIONAL SPECIFICATIONS
Item Description Code
Amplifier cover only P
Color change
Painting *8 Amplifier cover and terminal cover, Munsell 7.5 R4/14 PR
Coating change Epoxy resin-baked coating *9 X1
Exterior parts on the amplifier housing(name plates, tag plate, zero-adjustment screw,
316 SST exterior parts HC
stopper screw) will become 316 SST *10
Fluoro-rubber O-ring All O-rings of amplifier housing. Lower limit of ambient temperature: –15°C (5°F) *11 HE
Transmitter power supply voltage : 10.5 to 32 V DC ( 10.5 to 28 V DC for TIIS intrinsically safe
type, 10.5 to 30 V DC for intrinsically safe type other than TIIS, or 9 to 32 V DC for Fieldbus
Lightning protector communication type.) A
Allowable current : Max. 6000 A (140 s), Repeating 1000 A (140 s) 100 times
Oil-prohibited use Degrease cleansing treatment K1
Oil-prohibited use
Degrease cleansing and dehydrating treatment K5
with dehydrating treatment
No serration *1 No serration work on the flange gasket surface ( for ANSI flange only ) Q

Teflon film Diaphragm protection from sticky process fluid by FEP Teflon film attached with fluorinated oil.
T
Operation range: 20 to 150°C, 0 to 2 MPa(Not applicable for vacuum service).
Operating temperature correction *2 Adjusting range : 80°C to Maximum temperature of specified fill fluid R
Update time: 0.125 sec
Fast response *6 Amplifier assembly damping time constant: 0.1 to 64 sec in 9 increments. F1
Response time (with min. damping time constant): max. 0.3 sec (excluding diaphragm seal units)
Failure alarm down-scale *3 Output status at CPU failure and hardware error is –5%, 3.2 mA or less. C1
Failure alarm down-scale: output status at CPU failure and
C2
Output signal limits: hardware error is –5%, 3.2 mA or less.
NAMUR NE43 compliant *3 *7 3.8 mA to 20.5 mA
Failure alarm up-scale: output status at CPU failure and
C3
hardware error is 110%, 21.6 mA or more.
Data configuration at factory Description into “Descriptor” parameter of HART protocol CA
Amplifier housing material : JIS SCS14A stainless steel
Stainless steel amplifier housing *4 E1
(equivalent to JIS SUS316 cast stainless steel or ASTM CF-8M)

Gold-plate Inside of isolating diaphragms(fill fluid side) are gold plated, effective for hydrogen permeation.
A1
( applicable for Wetted parts material code S and H )
Wired tag plate Stainless steel tag plate wired onto transmitter N4
Capillary without PVC sheaths When ambient temperature exceeds 100°C, or use of PVC is prohibited V
P calibration ( psi unit ) D1
Calibration units *5 bar calibration ( bar unit ) (See Table 4.) D3
M calibration (kgf/cm2 unit ) D4
Sealant(liquid silicone rubber) is coated on JIS SUS630 cover flange mounting nuts against stress
Sealing treatment to JIS SUS630 nuts Y
corrosion cracking.
T13E.EPS
*1: This item cannot be applied to model EJA438W Wetted part material code H, T, or U, whose gasket contact surface are not serrated
as standard specifications.
*2: Specify the process operating temperature for zero correction. Example: Zero correction by process temperature 90C.
*3: Applicable for Output signal code D and E. The hardware error indicates faulty amplifier or capsule.
When combining with Option code F1, output status for down-scale is –2.5%, 3.6 mA DC or less.
*4: Applicable for Electrical connection code 2, 3, 4, A, C and D. Not applicable for Option code P, X1, and JF3.
*5: The unit of MWP (Max. working pressure) on name plate of a housing is the same unit as specified by Option code D1, D3, and D4.
*6: Applicable for Output signal code D and E. Write protection switch is attached for Output code E. Not applicable for Integral
indicator code E.
*7: Not applicable for Option code C1.
*8: Standard polyurethan painting can be used in acid atmosphere, whereas the epoxy resin-baked coating (Option code X1) can be used
in alkaline atmosphere. Anti-corrosion coating, the combination of polyurethan and epoxy resin-baked coating, is available by
special order as sea water, alkaline, and acid resistant.
*9: Not applicable for color change option.
*10: 316 or 316L SST. The specification is included in option code /E1. Not applicable with option code /JF3.
*11: Not applicable with option code /JF3.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E July 01, 2011-00
<<Contents>> <<Index>> 11

Item Description Code

Process flange, Block For model EJA438W M05
Mill Certificate
Process flange, Block, Pipe, Base For model EJA438N M06
( Flange rating ) ( Test Pressure ) (Applicable model)
Pressure test/Leak test
JIS 10K 2 MPa {20 kgf/cm2} T41
Certificate *1
JIS 20K 3 MPa {30 kgf/cm2} EJA438W/EJA438N T42

For A-capsule
JIS 40K 3 MPa {30 kgf/cm2} T43
JIS 63K 3 MPa {30 kgf/cm2} EJA438W T45
ANSI/JPI Class 150 3 MPa {29.8 kgf/cm2} T46
EJA438W/EJA438N
ANSI/JPI Class 300 3 MPa {30 kgf/cm2} T47
ANSI/JPI Class 600 3 MPa {30 kgf/cm2} EJA438W Nitrogen (N2) Gas *2 T49
JIS 10K 2 MPa {20 kgf/cm2} T31
EJA438W/EJA438N Retention time:
JIS 20K 5 MPa {50 kgf/cm2} 10 minutes T32
JIS 40K 10 MPa {100 kgf/cm2} EJA438W T33
For B-capsule

JIS 40K 7 MPa {70 kgf/cm2} EJA438N T34

JIS 63K 14 MPa {140 kgf/cm2} EJA438W T35
ANSI/JPI Class 150 3 MPa {29.8 kgf/cm2} EJA438W/EJA438N T36
ANSI/JPI Class 300 7.7 MPa {77 kgf/cm2} EJA438W T37
ANSI/JPI Class 300 7 MPa {70 kgf/cm2} EJA438N T38
ANSI/JPI Class 600 14 MPa {140 kgf/cm2} EJA438W T39
T15E.EPS
*1: The unit on the certificate is always MPa regardless of selection of option code D1, D3, or D4.
*2: Pure nitrogen gas is used for oil-prohibited use (Option code K1 and K5 ).

Table 4. Calibration Units

Measurement Optional Code Measurement Optional Code
Span and Span and
Range D1 ( psi Unit ) D3 ( bar Unit ) D4 ( kgf/cm2 Unit ) Range D1 ( psi Unit ) D3 ( bar Unit ) D4 ( kgf/cm2 Unit )

Span 8.6 to 430 psi 0.6 to 30 mbar 0.6 to 30 kgf/cm2 Span 8.6 to 430 psi 0.6 to 30 mbar 0.6 to 30 kgf/cm2
A A
EJA438W

EJA438N

Range -15 to 430 psi -1 to 30 mbar -1 to 30 kgf/cm2 Range -15 to 430 psi -1 to 30 mbar -1 to 30 kgf/cm2

Span 66 to 2000 psi 4.6 to 140 mbar 4.6 to 140 kgf/cm2 Span 66 to 1000 psi 4.6 to 70 mbar 4.6 to 70 kgf/cm2
B B
Range -15 to 2000 psi -1 to 140 mbar -1 to 140 kgf/cm2 Range -15 to 1000 psi -1 to 70 mbar -1 to 70 kgf/cm2
T12E.EPS

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Jul. 08, 2009-00
<<Contents>> <<Index>> 12
■ DIMENSIONS
● Model EJA438W
Unit : mm (approx. inch)
25 (0.98)
t
ød *1 f 34
(1.34)

øg

øD
øC
n-øh

140(5.51)
Wetted parts material
110 (4.33) code U (Titanium)
External indicator
94(3.70)
Conduit
conduit connection connection 12
(Optional) (0.47)
Terminal
Internal side

(3.07)
indicator

ø78
(Optional)

146(5.75)
197(7.76)

Ground
terminal
333(13.11)

Open to
Zero atmosphere
(4.88)

adjustment (ø5mm)
124

92
(3.62)
Shrouding bolt *2
(1.85)
47

2-inch pipe
(O.D. 60.5mm) Mounting bracket
(Flat-type, Optional)
*1: Indicates inside diameter of gasket contact surface.
*2: Applicable only for ATEX, IECEx, and TIIS Flameproof type.

Process flange size : 3 inch (80 mm)

Flange Rating øD øC øg ød t f* n øh
JIS 10K 185(7.28) 150(5.91) 130(5.12) 90(3.54) 18(0.71) 0 8 19(0.75)
JIS 20K 200(7.87) 160(6.30) 130(5.12) 90(3.54) 22(0.87) 0 8 23(0.91)
JIS 40K 210(8.27) 170(6.69) 130(5.12) 90(3.54) 32(1.26) 0 8 23(0.91)
JIS 63K 230(9.06) 185(7.28) 130(5.12) 90(3.54) 40(1.57) 0 8 25(0.98)
ANSI Class 150 190.5(7.50) 152.4(6) 130(5.12) 90(3.54) 23.9(0.94) 1.6(0.06) 4 19.1(0.75)
ANSI Class 300 209.6(8.25) 168.1(6.62) 130(5.12) 90(3.54) 28.5(1.12) 1.6(0.06) 8 22.4(0.88)
ANSI Class 600 209.6(8.25) 168.1(6.62) 130(5.12) 90(3.54) 38.2(1.50) 6.4(0.25) 8 22.4(0.88)
JPI Class 150 190(7.48) 152.4(6) 130(5.12) 90(3.54) 24(0.94) 1.6(0.06) 4 19(0.75)
JPI Class 300 210(8.27) 168.1(6.62) 130(5.12) 90(3.54) 28.5(1.12) 1.6(0.06) 8 22(0.87)
JPI Class 600 210(8.27) 168.1(6.62) 130(5.12) 90(3.54) 38.4(1.51) 6.4(0.25) 8 22(0.87)
DIN PN 10/16 200(7.78) 160(6.30) 130(5.12) 90(3.54) 20(0.79) 0 8 18(0.71)
DIN PN 25/40 200(7.78) 160(6.30) 130(5.12) 90(3.54) 24(0.94) 0 8 18(0.71)
DIN PN 64 215(8.46) 170(6.69) 130(5.12) 90(3.54) 28(1.10) 0 8 22(0.87)

Process flange size : 2 inch (50 mm)

Flange Rating øD øC øg ød t f* n øh
JIS 10K 155(6.10) 120(4.72) 100(3.94) 61(2.40) 16(0.63) 0 4 19(0.75)
JIS 20K 155(6.10) 120(4.72) 100(3.94) 61(2.40) 18(0.71) 0 8 19(0.75)
JIS 40K 165(6.50) 130(5.12) 100(3.94) 61(2.40) 26(1.02) 0 8 19(0.75)
JIS 63K 185(7.28) 145(5.12) 100(3.94) 61(2.40) 34(1.34) 0 8 23(0.91)
ANSI Class 150 152.4(6.00) 120.7(4.75) 100(3.94) 61(2.40) 19.1(0.75) 1.6(0.06) 4 19.1(0.75)
ANSI Class 300 165.1(6.50) 127.0(5.00) 100(3.94) 61(2.40) 22.4(0.88) 1.6(0.06) 8 19.1(0.75)
ANSI Class 600 165.1(6.50) 127.0(5.00) 100(3.94) 61(2.40) 31.8(1.25) 6.4(0.25) 8 19.1(0.75)
JPI Class 150 152(6.10) 120.6(4.75) 100(3.94) 61(2.40) 19.5(0.77) 1.6(0.06) 4 19(0.75)
JPI Class 300 165(6.50) 127.0(5.00) 100(3.94) 61(2.40) 22.5(0.89) 1.6(0.06) 8 19(0.75)
JPI Class 600 165(6.50) 127.0(5.00) 100(3.94) 61(2.40) 31.9(1.26) 6.4(0.25) 8 19(0.75)
DIN PN 10/16 165(6.50) 125(4.92) 100(3.94) 61(2.40) 18(0.71) 0 4 18(0.71)
DIN PN 25/40 165(6.50) 125(4.92) 100(3.94) 61(2.40) 20(0.78) 0 4 18(0.71)
DIN PN 64 180(7.09) 135(5.31) 100(3.94) 61(2.40) 26(1.02) 0 4 22(0.87)
* In case where process flange material is JIS S25C, value of f is 0.
F03E.EPS

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Mar. 23, 2006-00
<<Contents>> <<Index>> 13
● Model EJA438N

Unit : mm (approx. inch)

øD
øC
øg
øA

14 (0.55)
X2

f
t
120 ø30
140(5.51) (4.72) (1.18) n-øh

External indicator
94(3.70) 110 (4.33)
Conduit
conduit connection connection 12
(Optional) (0.47)
Terminal
Internal side

(3.07)
indicator

ø78
(Optional)

146(5.75)
197(7.76)
Ground
terminal
333(13.11)

Open to
Zero atmosphere
(4.88)

adjustment (ø5mm)
124

92
(3.62)
Shrouding bolt *1
(1.85)
47

2-inch pipe
(O.D. 60.5mm) Mounting bracket
(Flat-type, Optional)

*1: Applicable only for ATEX, IECEx, and TIIS Flameproof type. Diaphramg extension length code
2 : X2 = 50 mm (2 inch)
4 : X2 = 100 mm (4 inch)
6 : X2 = 150 mm (6 inch)
Process flange size : 4 inch (100 mm)
Flange Rating øD øC øg øA t f* n øh
JIS 10K 210(8.72) 175(6.89) 155(6.10) 96±0.5(3.78) 18(0.71) 0 8 19(0.75)
JIS 20K 225(8.86) 185(7.28) 155(6.10) 96±0.5(3.78) 24(0.94) 0 8 23(0.91)
JIS 40K 250(9.84) 205(8.07) 155(6.10) 96±0.5(3.78) 36(1.42) 0 8 25(0.98)
ANSI Class 150 228.6(9.00) 190.5(7.50) 155(6.10) 96±0.5(3.78) 23.9(0.94) 1.6(0.06) 8 19.1(0.75)
ANSI Class 300 254(10.00) 200.2(7.88) 155(6.10) 96±0.5(3.78) 31.8(1.25) 1.6(0.06) 8 22.4(0.88)
JPI Class 150 229(9.02) 190.5(7.50) 155(6.10) 96±0.5(3.78) 24(0.94) 1.6(0.06) 8 19(0.75)
JPI Class 300 254(10.00) 200.2(7.88) 155(6.10) 96±0.5(3.78) 32(1.26) 1.6(0.06) 8 22(0.87)
DIN PN 10/16 220(8.66) 180(7.09) 155(6.10) 96±0.5(3.78) 20(0.79) 0 8 18(0.71)
DIN PN 25/40 235(9.25) 190(7.48) 155(6.10) 96±0.5(3.78) 24(0.94) 0 8 22(0.87)

Process flange size : 3 inch (80 mm)

Flange Rating øD øC øg øA t f* n øh
JIS 10K 185(7.28) 150(5.91) 130(5.12) 71±0.5(2.80) 18(0.71) 0 8 19(0.75)
JIS 20K 200(7.87) 160(6.30) 130(5.12) 71±0.5(2.80) 22(0.87) 0 8 23(0.91)
JIS 40K 210(8.27) 170(6.69) 130(5.12) 71±0.5(2.80) 32(1.26) 0 8 23(0.91)
ANSI Class 150 190.5(7.50) 152.4(6) 130(5.12) 71±0.5(2.80) 23.9(0.94) 1.6(0.06) 4 19.1(0.75)
ANSI Class 300 209.6(8.25) 168.1(6.62) 130(5.12) 71±0.5(2.80) 28.5(1.12) 1.6(0.06) 8 22.4(0.88)
JPI Class 150 190(7.48) 152.4(6) 130(5.12) 71±0.5(2.80) 24(0.94) 1.6(0.06) 4 19(0.75)
JPI Class 300 210(8.27) 168.1(6.62) 130(5.12) 71±0.5(2.80) 28.5(1.12) 1.6(0.06) 8 22(0.87)
DIN PN 10/16 200(7.78) 160(6.30) 130(5.12) 71±0.5(2.80) 20(0.79) 0 8 18(0.71)
DIN PN 25/40 200(7.78) 160(6.30) 130(5.12) 71±0.5(2.80) 24(0.94) 0 8 18(0.71)
* In case where process flange material is JIS S25C, value of f is 0.
F04E.EPS

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E Mar. 23, 2006-00
<<Contents>> <<Index>> 14
● Terminal Configuration ● Terminal Wiring
+
SUPPLY Power supply and output terminal
–

CHECK + External indicator(ammeter) terminal*1

–

Communication Ground terminal

Terminals(BT200 etc.) SUPPLY CHECK CHECK METER
Connection hook Connection hook*1 *1: When using an external indicator or a check meter,
the internal resistance must be 10
or less.
Not available for Fieldbus communication(Output signal
code F and G).
F05E.EPS

< Ordering Information > “
” < Safety Barrier for TIIS Intrinsically Safe Type >
Specify the following when ordering Supplier Type Model
1. Model, suffix codes, and optional codes MTL3046B
2. Calibration range and units: MTL
MTL4041B
1) Calibration range can be specified with range value Isolator
specifications up to 5 digits (excluding any decimal point) KFD2-STC3-Ex 1
P+F
for low or high range limits within the range of -32000 to KFD2-STV3-Ex 1-1, 2, 3
T001E.EPS
32000.
2) Specify only one unit from the table ‘Settings when Note: Requirements of capacitance and inductance for cable
shipped.’ wiring.
3. Select normal or reverse for operation mode Cw ≤ Co – 11[nF]
Note: If not specified, the instrument is shipped in normal Lw ≤ Lo – 730[µH]
operation mode. (Co: Max. external capacitance)
4. Display scale and units (for transmitters equipped with (Lo: Max. external inductance)
integral indicator only)
Specify either 0 to 100 % or engineering unit scale and < Reference >
‘Range and Unit’ for engineering units scale : 1. JIS SUS316L stainless steel; Equivalent to AISI 316L.
Scale range can be specified with range limit specifications 2. JIS SUS316 stainless steel; Equivalent to AISI 316.
up to 5 digits (excluding any decimal point) for low or 3. JIS SUS304 stainless steel; Equivalent to AISI 304.
high range limits within the range of -19999 to 19999. 4. JIS S25C carbon steel; Equivalent to AISI 1025.
5. Tag Number (if required) 5. JIS SECC; Carbon steel.
6. Process fluid temperature for zero compensation (if 6. Teflon; Trademark of E.I. duPont de Nemours & Co.
required) 7. JIS SCM435 chrome molybdenum steel; Equivalent to
AISI 4137.
< Related Instruments > “
” 8. JIS SUS630 stainless steel; Equivalent to ASTM 630.
Power Distributor: Refer to GS 01B04T01-02E or 9. Hastelloy; Trademark of Haynes International Inc.
GS 01B04T02-02E 10. JIS SCS14A stainless steel; Equivalent to JIS SUS316
BRAIN TERMINAL: Refer to GS 01C00A11-00E cast stainless steel or ASTM CF-8M.
11. HART; Trademark of the HART Communication
Foundation.
12. FOUNDATION; Trademark of Fieldbus Foundation.
13. PROFIBUS; Registered trademark of Profibus
Nutzerorganisation e.v., Karlsruhe, Germany.
14. Other company names and product names used in this
material are registered trademarks or trademarks of their
respective owners.

All Rights Reserved. Copyright © 1994, Yokogawa Electric Corporation GS 01C22J03-00E June 01, 2007-00
Subject to change without notice.