Yokogawa High Gauge Pressure Transmitter, EJX440A
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EJX440A High Gauge Pressure Transmitter

Brand: Yokogawa Electric Corporation
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The high performance gauge pressure transmitter EJX440A features single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam pressure. 

The EJX440A 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 diagnostics.

The multi-sensing technology provides the advanced diagnostic function to detect such abnormalities as an impulse line blockage or heat trace breakage. 

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 TÜV as complying with SIL 2 for safety requirement.
Features
  • Accuracy: ± 0.04% of Span
  • Response Time: 90 msec
  • Stability: ± 0.1% of URL per 15 years

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Specifications

Brand

Accuracy

  • ± (0.005 + 0.0035 URL/Span) % of Span - Capsule D
  • ± (0.005 + 0.0055 URL/Span) % of Span - Capsule C
  • ± 0.04 % of Span - Capsule C & D

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 80° C (-22° to 176° F) - with LCD Display
  • -40° to 85° C (-40° to 185° 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
  • CE
  • CSA Explosion-proof & Intrinsically Safe
  • EMC EN 61326-1 Class A (For Industrial Locations), EN 61326-2-3, EN 61326-(For Fieldbus)
  • FM Explosion-proof & Intrinsically Safe
  • IECEx Intrinsically Safe & Flameproof Approval
  • NAMUR NE43
  • PED 2014/68/EU-Sound Engineering Practice

Burst Pressure

  • psi: 19,100 (MPa: 132, bar: 1,320)

Cable Material

  • Polyethylene Insulated PVC Sheathed

Communication

  • BRAIN
  • FOUNDATION Fieldbus
  • HART
  • PROFIBUS PA

Damping Adjustment

  • 0 to 100 seconds

Diagnostics

  • Capsule Temperature
  • Configuration Error
  • CPU Failure
  • Hardware Failure
  • Over-Range Error
  • Process Alarm for Pressure

Diaphragm Material

  • Hastelloy C-276

Display

  • 10-Segment - User Configurable, Signal Characterizer for 4-20 mA Output
  • 5-Digit Numerical Display
  • 6-Digit Unit Display
  • Bar Graph
  • LCD Display

Distance

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

Drain, Vent Valves & Plug

  • 316 Stainless Steel

Electrical Connectors

  • 1/2” NPT Female
  • G 1/2” Female
  • M20 Female

Electrical Protection

  • Lightning Protection

Electrical Rating

  • 120 mA DC, Max.

Enclosure Finish

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

Enclosure, Body Material

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

Environmental Protection

  • IP66
  • IP67
  • NEMA 4X

Fill Material

  • Fluorinated Oil
  • Silicone

Flange Material

  • F316 Stainless Steel - Cover Flange

Fluid

  • Gas
  • Liquid

Gasket Material

  • Glass Reinforced Teflon - for Capsule C
  • Teflon-Coated 316L Stainless Steel - Capsule Gasket

Humidity

  • 0 to 100 % Relative Humidity - Ambient Humidity

Indication

  • Digital

Input Impedance

  • 10 kiloohms or more at 2.4 kHz - Communicating Device

Length

  • 1.33” (34 mm) Standard - Long Vent
  • 4.6” (119 mm) - Long Vent

Load

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

Materials of Construction

  • 316 Stainless Steel - Name Plate & Tag

Measuring Time

  • 45 milliseconds Nominal - Dead Time

Mounting

  • 2” Pipe Mounting Bracket

Mounting Position Effect

  • Tilting up to 90° will cause Zero Shift up to 0.4 kPa

NACE & NIST

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

NPT Connection

  • 1/2” NPT Female
  • 1/4” NPT Female

Nut & Bolt Material

  • 316L Stainless Steel
  • 660 Stainless Steel
  • B7 Carbon Steel

O-Ring Material

  • Buna-N - Cover O-Ring
  • Fluorinated Rubber - Cover O-Rings

Operating Temperature

  • -20° to 80° C (-4° to 176° F)

Output

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

Output Format

  • Transistor Output

Overpressure & Static Pressure Limits

  • psi: 10,800 (kPa: 74,460, bar: 744.6) - Capsule D, Max.
  • psi: 6,750 (kPa: 48,000, bar: 465.4) - Capsule C, Max.

Power Supply Effect

  • ± 0.005 % Per Volt (From 21.6 to 32 Vdc, 350 ohms)

Pressure Range

  • bar: -1 to 500
  • kPa: -100 to 50,000
  • psi: -14.5 to 7,200

Pressure Type

  • Gauge

Process Connection Material

  • 316 Stainless Steel (D-Caspule)
  • ASTM CF-8M (C-Capsule)

Process Temperature

  • -40° to 120° C (-40° to 248° F)

Response Time

  • 90 milliseconds

Screw Material

  • 316 Stainless Steel

Stability

  • ± 0.1 % of URL Per 15-Years

Supply Pressure - Maximum

  • psi: 4,500 (MPa: 32, bar: 320) - Capsule C
  • psi: 7,200 (MPa: 50, bar: 500) - Caspule D

Supply Voltage

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

Temperature Effect

  • ± (0.04 % of Span + 0.009 % of URL) Per 28° C (50° F) - Capsule D Ambient Temperature Effect
  • ± [0.04 % of Span + 0.0141 % of URL] Per 28° C (50° F) - Capsule C Ambient Temperature Effect

Update Time

  • 45 milliseconds - Pressure

Vibration Effect

  • < 0.1 % of URL

Wetted Materials

  • 316L Stainless Steel
  • F316L Stainless Steel

Zero Offset

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

Documentation

Data Sheets

Brochure

Certificate

Manual

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