Yokogawa Absolute Pressure Transmitter, EJA310A
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EJA310A Absolute Pressure Transmitter

Brand: Yokogawa Electric Corporation
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The high performance gauge pressure transmitter model EJA310A can be used to measure liquid, gas, or steam pressure.

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

Model EJA310A also features remote setup and monitoring through communications with the BRAIN terminal and CENTUM-CS or µXL or HART 275 host.
Features
  • 0.15% Accuracy (0.075% Option)
  • 0.1% Stability
  • External Zero Adjust

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Specifications

Brand

Accuracy

  • ± 0.075 % of Span (Including the Effects of Zero-based Linearity, Hysteresis & Repeatability) - when High Accuracy is Specified
  • ± 0.15 % of Span (Including the Effects of Zero-based Linearity, Hysteresis & Repeatability)
  • ± 0.20 % of Span (Including the Effects of Zero-based Linearity, Hysteresis & Repeatability) - for Capsule L

Adjustment Type

  • External Zero Adjustment Screw

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

  • -15° C (5° F): Fluoro Rubber O-Ring
  • -30° to 80° C (-22° to 176° F) with LCD Display
  • -40° to 85° C (-40° to 185° F)

Approvals & Certifications

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

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

  • 0.1 to 64 seconds in 9 Increments
  • 0.2 to 64 seconds

Diaphragm Material

  • Hastelloy C-276

Distance

  • 2 Kilometers - Communication

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-Baked Coating - Painting
  • Polyurethane Paint (Munsell 0.6 GY3.1/2.0)

Enclosure, Body Material

  • Aluminum Alloy - Copper Cast
  • SCS14A Stainless Steel

Environmental Protection

  • IP67
  • NEMA 4X

Fill Material

  • Fluorinated Oil - Fill Fluid
  • Silicone

Flange Material

  • JIS SUS630
  • SCS14A - Cover Flange

Gasket Material

  • Fluorinated Rubber - Process Connector Gasket
  • PTFE Teflon - Process Connector Gasket
  • Teflon-Coated SUS316L - Capsule Gasket

Humidity

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

Input

  • psia: 0.01885 (kPa: 0.13, bar: 0.0013) - Min. Input for Capsule L
  • psia: 0.3916 (kPa: 2.7, bar: 0.027) - Min. Input for Capsule M & A

Input Impedance

  • 10 kiloohms or more at 2.4 kHz

Length

  • 4.6” (119 mm) - Long Vent

Load

  • 0 to 1,335 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

  • SUS304 - Name Plate & Tag
  • SUS316 - Name Plate & Tag

Maximum System Pressure

  • psi: 652.7 (kPa: 4,500, bar: 45)

Media

  • Liquids & Gases

Mounting

  • 2” (50.8 mm) Pipe Mounting Bracket

Mounting Position Effect

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

NACE & NIST

  • NACE MR-0175

NPT Connection

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

Nut & Bolt Material

  • SCM435
  • SUH660
  • SUS630

O-Ring Material

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

Operating Temperature

  • -20° to 80° C (-4° to 176° F)

Output

  • 4-20 mA DC (2-Wire) with Digital Communications

Overpressure & Static Pressure Limits

  • psi: 645 (MPa: 4.5, bar: 44.47) - Max.
  • psi: 72 (kPa: 500, bar: 5) - Max.

Power Supply Effect

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

Pressure Range

  • bar: 0 to 30
  • mmHg: 0 to 960
  • MPa: 0 to 3
  • psi: 0 to 430

Pressure Type

  • Absolute
  • Differential
  • Gauge

Process Connection Material

  • SCS14A

Process Temperature

  • -40° to 100° C (-40° to 212° F) - L Capsule
  • -40° to 120° C (-40° to 248° F) - M & A Capsules

Response Time

  • 0.3 second, Max.

Stability

  • ± 0.1 % of URL Per 12 Months

Supply Pressure - Maximum

  • psi: 1.47 (kPa: 10, bar: 0.10) - for Capsule L
  • psi: 18.65 (kPa: 130, bar: 1.28) - for Capsule M
  • psi: 430 (MPa: 3, bar: 29.65) - for Capsule A

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 Supply, up to 570 ohms Load Can be Used
  • 9-32 Vdc - Lighting Protector

Temperature Effect

  • ± [0.080 % of Span + 0.008 % of URL] Per 28° C (50° F) - Ambient Temperature Effect for Capsule A
  • ± [0.084 % of Span + 0.028 % of URL] Per 28° C (50° F) - Ambient Temperature Effect for Capsule M
  • ± [0.095 % of Span + 0.118 % of URL] Per 28° C (50° F) - Ambient Temperature Effect for Capsule L

Update Time

  • 0.125 second

Wetted Materials

  • SCS14A - Body
  • SUS316 - Vent Plug
  • SUS316L - Capsule

Zero Offset

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

Documentation

Data Sheets

Certificate

Manual

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