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EJA438W Diaphragm Sealed Gauge Pressure Transmitter
Brand: Yokogawa Electric CorporationDiaphragm 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.
Model EJA438W Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas or steam pressure. They output a 4-20 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.
Specifications
Accuracy
- ± 0.2 %
Alarm
- Down-Scale: -2.5 %, 3.6 mA DC or Less
- Down-Scale: -5 %, 3.2 mA DC or Less
- Up-Scale: 110 %, 21.6 mA DC or more
Ambient Temperature Range
- -30° to 60° C (-22° to 140° F) - Integral Indicator
- -40° to 60° C (-40° to 140° F) - General-Use Typical
Approvals & Certifications
- ATEX Flameproof
- CSA Explosion-proof & Intrinsically Safe
- EMC - EN 61326-1 Class A, EN 61326-2-3 & EN 61010-1
- FM Explosion-proof & Intrinsically Safe
- IECEx Intrinsically Safe & Flameproof Approval
- NAMUR NE43
- PED 97/23/EC - Sound Engineering Practice
- TIIS Flameproof & Intrinsically Safe
Approvals & Certifications
- Leak Test
- Mill Certificate
- Pressure Test
Cable Material
- Polyethylene Insulated PVC Sheathed
Capillary Length
- 16.4 feet (5 metres)
Capillary Material
- JIS SUS316 - Capillary Tube
Communication
- BRAIN
- FOUNDATION Fieldbus
- HART
- PROFIBUS PA
Damping Adjustment
- 0.1 to 64 seconds in 9 Increments
Diaphragm Material
- 316L Stainless Steel
- Hastelloy C-276
- Tantalum
- Titanium
Distance
- 2 Kilometers (1.25 Miles)
Electrical Connectors
- 1/2” NPT Female
- Blind Plug
- G 1/2” Female
- M20 Female
- PG13.5 Female
Enclosure Finish
- Deep Sea Moss Green (Munsell 0.6 GY3.1/2.0)
- Epoxy Resin-Baked Coating
- Polyurethance Resin Baked Finish
Enclosure, Body Material
- Cast Aluminum Alloy - Amplifier Housing
- JIS SCS14A - Amplifier Housing
Environmental Protection
- IP67
- NEMA 4X
Fill Material
- Ethylene Glycol
- Fluorinated Oil
- Silicone Oil
Flange Material
- JIS S25C
- JIS SCS14A - Cover Flange, Transmitter Material
- JIS SUS304 - Protection Tube, Tag Plate, Mounting Bracket
- JIS SUS316 - Pipe, Tag Plate, Mounting Bracket
Flange Size - 2” (DN 50)
- 2” (DN 50) - 150# ANSI/JPI
- 2” (DN 50) - 300# ANSI/JPI
- 2” (DN 50) - 600# ANSI/JPI
- 2” (DN 50) - JIS 10K
- 2” (DN 50) - JIS 20K
- 2” (DN 50) - JIS 40K
- 2” (DN 50) - JIS 63K
- 2” (DN 50) - PN 10
- 2” (DN 50) - PN 16
- 2” (DN 50) - PN 25
- 2” (DN 50) - PN 40
- 2” (DN 50) - PN 64
Flange Size - 3” (DN 80)
- 3” (DN 80) - 150# ANSI/JPI
- 3” (DN 80) - 300# ANSI/JPI
- 3” (DN 80) - 600# ANSI/JPI
- 3” (DN 80) - JIS 10K
- 3” (DN 80) - JIS 20K
- 3” (DN 80) - JIS 40K
- 3” (DN 80) - JIS 63K
- 3” (DN 80) - PN 10
- 3” (DN 80) - PN 16
- 3” (DN 80) - PN 25
- 3” (DN 80) - PN 40
- 3” (DN 80) - PN 64
Fluid Specific Gravity
- 0.94 to 1.09 at 25° C (77° F) - Silicone Oil
- 1.09 at 25° C (77° F) - Ethylene Glycol
- 1.90 to 1.92 at 25° C (77° F) - Fluorinated Oil
Humidity
- 5 to 100 % Relative Humidity at 40° C (104° F) - Ambient Humidity
Indication
- LCD Digital Indicator - Integral Indicator
Input Impedance
- 10 kiloohms or more at 2.4 kHz
Load
- 0.22 µF or Less - Load Capacitance
- 250 to 600 ohms - Digital Communication
- 3.3 MH or Less - Load Inductance
Materials of Construction
- Carbon Steel (JIS SECC) - Mounting Bracket
Mounting
- 2” Pipe Mounting - Transmitter
- Flange Mounting - Diaphragm Seal
Mounting Position
- Horizontal
NACE & NIST
- NACE MR-0175
Nut & Bolt Material
- JIS SCM435 - Cover Flange Bolts Material
- JIS SUS630 - Cover Flange Bolts Material
O-Ring Material
- Fluororubber
Operating Temperature
- 20° to 150° C (68° to 302° F) - Teflon Film
- Maximum
Output
- 3.8-20.5 mA
- 4-20 mA DC (2-Wire)
Power Supply Effect
- ± 0.005 % Per Volt (21.6-32 Vdc, 350 ohms)
Pressure Range
- kPa: -100 to 14,000
- mbar: -1 to 140
- psi: -15 to 2,000
Pressure Type
- Gauge
Process Temperature
- -50° to 300° C (-58° to 572° F)
Response Time
- 0.3 second, Max.
Supply Pressure
- psi: 0.391 to 14.5 (kPa: 2.7 to 100, bar: 0.027 to 1)
Supply Voltage
- 10.5-28 Vdc - TIIS Intrinsically Safe Typical
- 10.5-30 Vdc - Intrinsically Safe, Typical N, Non-Incendive or Non-Sparking Typical
- 10.5-32 Vdc - Lightning Protector
- 10.5-42 Vdc - General Use & Flameproof Typical
- 16.4-42 Vdc - Communication Line
Temperature Effect
- ± 1.4 %/50° C (122° F) - Total Shift Ambient Temperature Effect
- ± 1.6 %/50° C (122° F) - Total Shift Ambient Temperature Effect
Update Time
- 0.125 second
Wetted Materials
- 316L Stainless Steel
- Hastelloy C-276
- Tantalum
- Titanium
Zero Offset
- 0.01 % of Span - Continuously Adjustable Resolution (External Zero Adjustment)
