Yokogawa Gauge Pressure Transmitter, EJX438A
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EJX438A Gauge Pressure Transmitter

Brand: Yokogawa Electric Corporation

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. 

EJX438A Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas, or steam pressure. EJX438A outputs a 4-20 mA DC signal corresponding to the measured pressure.

It also features quick response, remote setup and monitoring via BRAIN or HART communications, and diagnostics and optional status output for pressure high/low alarm. 

The multi-sensing technology provides the advanced diagnostic function to detect such abnormality as an impulse line blockage. FOUNDATION Fieldbus and PROFIBUS PA protocol types are also available.

All EJX series models in their standard configuration, with the exception of the Fieldbus and PROFIBUS types, are certified by TUV as complying with SIL 2 for safety requirement.
Features
  • ± 0.15% Accuracy
  • 200 ms Response Time
  • Exida and TUV SIL2 / SIL3 Certified
  • Capillary Fill Fluid Density Compensation
  • Local Parameters Setting (LPS)

Specifications

Brand

Accuracy

  • ± (0.1 + 0.005 URL/Span) % of Span (Includes Terminal-based Linearity, Hysteresis & Repeatability)
  • ± 0.15 % of Span (Includes Terminal-based Linearity, Hysteresis & Repeatability)

Adjustment Type

  • Push Button
  • Screw - External Zero Adjustment

Alarm

  • 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) - LCD Display
  • -40° to 60° C (-40° to 140° F)

Approvals & Certifications

  • Leak Test
  • Material Certificate
  • Pressure Test
  • SIL 2 Capability for Single Transmitter Use, SIL 3 Capability for Dual Transmitter Use, IEC 61508: 2000
  • TÜV (Technischer Uberwachungsverein)

Approvals & Certifications

  • ATEX - Flameproof & Intrinsically Safe
  • CSA - Explosion-proof & Intrinsically Safe
  • EMC EN 61326-1 Class A (For Industrial Locations), EN 61326-2-3 & EN 61326-2-5 (Fieldbus)
  • FM - Explosion-proof & Intrinsically Safe
  • IECEx - Flameproof & Intrinsically Safe
  • NAMUR NE43
  • PED 2014/68/EU - Sound Engineering Practice
  • PED 97/23/EC - Sound Engineering Practice

Cable Material

  • Polyethylene Insulated PVC Sheathed

Capillary Length

  • 0 to 32.80 ft (0 to 10 metres)

Capillary Material

  • JIS SUS316 - Capillary Tube

Communication

  • BRAIN
  • FOUNDATION Fieldbus
  • HART
  • PROFIBUS PA

Current

  • 6,000 A, Max.

Damping Adjustment

  • 0 to 100 seconds

Dead Time

  • 45  ms (Nominal)

Diagnostics

  • Configuration Error
  • CPU Failure
  • Hardware Failure
  • Process Alarm for Pressure or Capsule Temperature

Diaphragm Material

  • 316L Stainless Steel
  • Hastelloy C-276
  • Tantalum
  • Titanium

Display

  • 10-Segment Signal Characterizer (User-Configurable)
  • 5-Digit Numerical Display
  • 6-Digit Unit Display
  • Bar Graph
  • LCD Display

Distance

  • Up to 2 Kilometers (1.25 Miles) - Communication Distance

Drain, Vent Valves & Plug

  • 316 Stainless Steel

Electrical Connectors

  • 1/2" NPT Female
  • 1/4" NPT - Vent/Drain Plugs
  • G 1/2" Female
  • M20 Female
  • R: 1/4" - Vent/Drain Plugs

Electrical Protection

  • Lightning Protection

Enclosure Finish

  • Anti-Corrosion Coating
  • Polyurethane, Mint-Green Paint (Munsell 5.6BG 3.3/2.9 or its Equivalent)

Enclosure, Body Material

  • ASTM CF-8M Stainless Steel - Amplifier Housing
  • Low Copper Cast Aluminum Alloy - Amplifier Housing

Environmental Protection

  • IP66
  • IP67
  • NEMA 4X

Fill Material

  • Ethylene Glycol
  • Fluorinated Oil
  • Silicone

Flange Material

  • 304 Stainless Steel
  • 316 Stainless Steel
  • 316L Stainless Steel - Coverflange Bolts & Nuts Material
  • 660 Stainless Steel - Coverflange Bolts & Nuts Material
  • ASTM CF-8M - Cover Flange
  • B7 Carbon Steel - Coverflange Bolts & Nuts Material
  • JIS S25C - Process Flange

Flange Size - 1-1/2” (DN 40)

  • 1-1/2" (DN 40) - 150# ANSI / JPI
  • 1-1/2" (DN 40) - 300# ANSI / JPI
  • 1-1/2" (DN 40) - 600# ANSI / JPI
  • 1-1/2" (DN 40) - JIS 10K
  • 1-1/2" (DN 40) - JIS 20K
  • 1-1/2" (DN 40) - JIS 40K
  • 1-1/2" (DN 40) - JIS 63K
  • 1-1/2" (DN 40) - PN 10
  • 1-1/2" (DN 40) - PN 16
  • 1-1/2" (DN 40) - PN 25
  • 1-1/2" (DN 40) - PN 40
  • 1-1/2" (DN 40) - PN 64

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) - PN 10
  • 3" (DN 80) - PN 16
  • 3" (DN 80) - PN 25
  • 3" (DN 80) - PN 40
  • 3" (DN 80) - PN 64

Flange Size - 4” (DN 100)

  • 4" (DN 100) - 150# ANSI / JPI
  • 4" (DN 100) - 300# ANSI / JPI
  • 4" (DN 100) - JIS 10K
  • 4" (DN 100) - JIS 20K
  • 4" (DN 100) - JIS 40K
  • 4" (DN 100) - PN 10
  • 4" (DN 100) - PN 16
  • 4" (DN 100) - PN 25
  • 4" (DN 100) - PN 40

Fluid Specific Gravity

  • 0.94 to 1.09 - Silicone Oil
  • 1.09 - Ethylene Glycol
  • 1.90 to 1.92 - Fluorinated Oil

Gasket Material

  • 316 Stainless Steel (Hoop) - Spiral Gasket for Transmitter Side
  • PTFE Teflon (Filler) - Spiral Gasket for Transmitter Side

Humidity

  • 0 to 100 % RH - Ambient Humidity Limit

Indication

  • Digital

Input Impedance

  • 10 kΩ or more at 2.4 kHz - Communicating Device

Load

  • 0 to 1,290 ohms - for Operation
  • 0.22 μF or Less - Load Capacitance
  • 250 to 600 ohms - Digital Communication
  • 3.3 MH or Less - Load Inductance

Materials of Construction

  • 304 Stainless Steel - Mounting Brackets
  • 316 Stainless Steel - Name Plate & Tag, Mounting Brackets

Mounting

  • 2" Pipe Mounting - Transmitter

Mounting Position

  • Horizontal

NACE & NIST

  • NACE MR-0103
  • NACE MR-0175, ISO 15156

O-Ring Material

  • Buna-N - Cover O-Ring
  • Fluororubber - Cover O-Ring

Output

  • 3.6 - 21.6 mA
  • 4-20 mA DC - 2-Wire

Output Format

  • Transistor Contact Output (Sink Typical) at Rating 10.5-30 Vdc, 120 mA DC, Max.

Power Supply Effect

  • ± 0.005 % per Volt (From 21.6 - 32 Vdc, 350 ohms)

Pressure Range

  • bar: -1 to 160
  • kPa: -100 to 16,000
  • psi: 5 to 2,300

Pressure Type

  • Absolute
  • Gauge

Process Connection Style

  • Extended Typical
  • Flush Typical

Process Temperature

  • -50° to 310° C (-58° to 590° F)

Response Time

  • 200 ms

Supply Pressure

  • psi: 0.38 to 14.5 (kPa: 2.7 to 100, bar: 0.026 to 1)

Supply Voltage

  • 10.5-30 Vdc - Intrinsically Safe, Typical N or Non-Incendive
  • 10.5-32 Vdc - Lightning Protector
  • 10.5-42 Vdc - General Use & Flameproof Typical
  • 24 Vdc, up to 550 ohms Load
  • Minimum 16.6 Vdc - Digital Communications, BRAIN & HART

Temperature Effect

  • ± (0.5 % of Span + 0.025 % of URL) Per 28° C (50° F) - Ambient Temperature Effect

Update Time

  • 45 ms - Pressure

Wetted Materials

  • 316L Stainless Steel
  • Hastelloy C-276
  • Tantalum
  • Titanium

Zero Offset

  • 0.01 % Incremental Resolution of Span - External Zero is Continuously Adjustable

Documentation

Data Sheets

Brochure

Certificate

Manual

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