Yokogawa High Gauge Pressure Transmitter, EJA440A
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EJA440A High Gauge Pressure Transmitter

Brand: Yokogawa Electric Corporation
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The high performance gauge pressure transmitter model EJA440A can be used to measure liquid, gas, or steam pressure.

It outputs a 4 to 20 mA DC signal corresponding to the measured gauge pressure.

Model EJA440A also features remote setup and monitoring through communications with the BRAIN terminal and CENTUM CS or µXL or HART 275 host.
Features
  • 0.12% Accuracy
  • 0.1% Stability per 5 years
  • 8,500 psi MWP

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Specifications

Brand

Accuracy

  • ± 0.12 % of Span (Including the Effects of Zero-based Linearity, Hysteresis & Repeatability)

Adjustment Type

  • Screw - External Zero Adjustment

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 80° C (-22° to 176° F) with LCD Display
  • -40° to 85° C (-40° to 185° F)

Approvals & Certifications

  • ATEX
  • CSA Explosion-proof, Intrinsically Safe
  • EMC EN 61326-1 Class A, Table 2, EN 61326-2-3
  • FM Explosion-proof, Intrinsically Safe
  • IECEx Intrinsically Safe, Typical N & Flameproof
  • NAMUR NE43
  • PED 97/23/CE - Sound Engineering Practice

Approvals & Certifications

  • Leak Test
  • Mill Certificate
  • Pressure Test

BSP Connection

  • 1/2” BSPT Female
  • 1/4” BSPT Female

Cable Material

  • Polyethylene Insulated PVC Sheathed

Communication

  • BRAIN
  • FOUNDATION Fieldbus
  • HART
  • PROFIBUS PA

Damping Adjustment

  • 0.2 to 64 seconds

Diaphragm Material

  • Hastelloy C-276

Display

  • LCD Display

Distance

  • Up to 2 Kilometers - Communication Distance

Drain, Vent Valves & Plug

  • 316 Stainless Steel
  • ASTM Grade 316

Electrical Connectors

  • 1/2” NPT Female
  • G 1/2” Female
  • M20 Female
  • PG13.5 Female

Enclosure Finish

  • Epoxy Resin Coating
  • Polyurethane Paint (Munsell 0.6 GY3.1/2.0)

Enclosure, Body Material

  • 316 Stainless Steel
  • Low Copper Cast-Aluminum Alloy

Environmental Protection

  • IP67
  • NEMA 4X

Fill Material

  • Fluorinated Oil
  • Silicone

Flange Material

  • SUSF316 - Cover Flange

Gasket Material

  • 316L Stainless Steel

Humidity

  • 5 to 100 % Relative Humidity at 40° C (104° F) - Ambient Humidity

Input Impedance

  • 10 kiloohms or more at 2.4 kHz - Communicating Device

Length

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

Load

  • 0 to 1,335 ohms - for Operation
  • 0.22 µF - Load Capacitance
  • 250 to 600 ohms - for Digital Communication
  • 3.3 MH - Load Inductance

Materials of Construction

  • 304 Stainless Steel - Name Plate & Tag, Mounting Bracket
  • 316 Stainless Steel - Name Plate & Tag, Mounting Bracket
  • SECC Carbon Steel - Mounting Bracket

Mounting Position

  • Horizontal
  • Vertical

Mounting Position Effect

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

NACE & NIST

  • NACE

NPT Connection

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

Nut & Bolt Material

  • SCM435
  • SUH660
  • SUS630

O-Ring Material

  • Buna-N - Cover O-Ring
  • Fluoro Rubber - Process Connector O-Ring (C Capsule), Cover O-Ring
  • Glass Reinforced Teflon - Process Connector O-Ring (C & D Capsule)

Operating Temperature

  • -20° to 80° C (-4° to 176° F) - Oil Prohibited Use

Output

  • 4-20 mA DC (2-Wire)

Overpressure & Static Pressure Limits

  • psig: 6,750 (kPa: 48,000, bar: 465.4) - Capsule C, Max.
  • psig: 8,500 (kPa: 60,000, bar: 586.1) - Capsule D, 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: -15 to 7,200

Pressure Type

  • Absolute
  • Gauge

Process Connection Material

  • SCS14A - C Capsule
  • SUS316 - D Capsule

Process Temperature

  • -40° to 120° C (-40° to 248° F)

Response Time

  • 0.3 second, Max.

Screw Material

  • 316 Stainless Steel

Stability

  • ± 0.1 % of URL Per 60 Months

Supply Pressure - Maximum

  • psi: 4,500 (kPa: 32,000, bar: 320) - Capsule C
  • psi: 7,200 (kPa: 50,000, bar: 500) - Capsule D

Supply Voltage

  • 10.5-30 Vdc - for Intrinsically Safe, Typical N, Non-Incendive or Non-Sparking Typical
  • 10.5-32 Vdc - for Lightning Protector
  • 10.5-42 Vdc - for General Use & Flameproof Typical
  • 16.4 Vdc - for Digital Communications, BRAIN & HART
  • 24 Vdc - up to A 570 ohms Load Can be Used
  • 9-32 Vdc- for Fieldbus Communication Typical

Temperature Effect

  • ± (0.084 % of Span + 0.035 % of URL) - Ambient Temperature Effects Per 28° C (50° F)

UNF/UNC Connection

  • 7/16”-20 UNF Female

Update Time

  • 0.125 second

Wetted Materials

  • 316L Stainless Steel - Capsule

Zero Offset

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

Documentation

Data Sheets

Manual

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