Yokogawa Absolute Pressure Transmitter, EJX310A
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EJX310A Absolute Pressure Transmitter

Brand: Yokogawa Electric Corporation
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The high performance absolute pressure transmitter EJX310A features single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam pressure. 

The EJX310A 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. 

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
  • ± 0.075% Accuracy
  • ± 0.2% per 15 years Stability
  • 90 ms Response Time
  • Exida and TUV SIL 2/3 Certification
  • LPS (Local Parameter Setting)

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Specifications

Brand

Accuracy

  • ± (0.005 + 0.0035 URL/Span) % of Span (Includes Terminal-based Linearity, Hysteresis, & Repeatability)
  • ± (0.01 + 0.005 URL/Span) % of Span (Includes Terminal-based Linearity, Hysteresis, & Repeatability)
  • ± (0.02 + 0.03 URL/Span) % of Span (Includes Terminal-based Linearity, Hysteresis, & Repeatability)
  • ± 0.04 % of Span (Includes Terminal-based Linearity, Hysteresis, & Repeatability)
  • ± 0.075 % of Span (Includes Terminal-based Linearity, Hysteresis, & Repeatability)

Adjustment Type

  • External Zero Adjustment Screw
  • Push Button

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

  • 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 (For Fieldbus)
  • FM Explosion-proof & Intrinsically Safe
  • IECEx Flameproof & Intrinsically Safe
  • NAMUR NE43

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, Part 1 to Part 7
  • TÜV (Technischer Uberwachungsverein)

BSP Connection

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

Burst Pressure

  • psi: 10,000 (MPa: 69, bar: 690)

Cable Material

  • Polyethylene Insulated PVC Sheathed

Communication

  • BRAIN
  • FOUNDATION Fieldbus
  • HART
  • PROFIBUS PA

Damping Adjustment

  • 0 to 100 seconds

Dead Time

  • 45 milliseconds

Diagnostics

  • Configuration Error
  • CPU Failure
  • Hardware Failure
  • Heat Trace Monitoring - Advanced Diagnostic
  • Impulse Line Blockage Detection - Advanced Diagnostics
  • Process Alarm for Pressure or Capsule Temperature
  • User-Configurable Process High/Low Alarm for Pressure

Diaphragm Material

  • ASTM N10276
  • 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 - 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, 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 Oil

Flange Material

  • ASTM CF-8M - Cover Flange

Gasket Material

  • Fluorinated Rubber - Process Connector Gasket
  • PTFE - Process Connector Gasket
  • Teflon-Coated 316L Stainless Steel

Humidity

  • 0 to 100 % Relative Humidity - 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 1,290 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

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

Mounting

  • 2” (50.8 mm) Pipe Mounting Bracket

Mounting Position

  • Horizontal
  • Vertical

Mounting Position Effect

  • Tilting up to 90° will cause Zero Shift up to 0.5 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
  • Fluororubber - Cover O-Ring

Operating Temperature

  • -20° to 80° C (-4° to 176° F)

Output

  • 3.6-21.6 mA
  • 3.8-20.5 mA - Output Signal Limits
  • 4-20 mA DC (2-Wire)

Output Format

  • Transistor Output

Overpressure & Static Pressure Limits

  • psia: 2,300 (MPa: 16, bar: 160) for a Capsule - Max.
  • psia: 3,600 (MPa: 25, bar: 250) for B Capsule - Max.
  • psia: 72 (kPa: 500, bar: 5) for L & M Capsules - Max.

Power Supply Effect

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

Pressure Range

  • bar: 0 to 160
  • kPa: 0 to 16,000
  • mmHg: 0 to 970
  • psi: 0 to 2,300

Pressure Type

  • Absolute

Process Connection Material

  • ASTM CF-8M

Process Temperature

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

Response Time

  • 90 milliseconds

Stability

  • ± 0.2 % of URL for 10-Years

Supply Pressure - Maximum

  • psia: 1.45 (kPa: 10, bar: 0.1) - L Capsule
  • psia: 18.8 (kPa: 130, bar: 1.3) - M Capsule
  • psia: 2,300 (MPa: 16, bar: 160) - B Capsule
  • psia: 500 (MPa: 3.5, bar: 35) - A Capsule

Supply Voltage

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

Temperature Effect

  • ± (0.04 % of Span + 0.012 % of URL) Per 28° C (50° F) - Capsule A & B Ambient Temperature Effect
  • ± (0.04 % of Span + 0.035 % of URL) Per 28° C (50° F) - Capsule M Ambient Temperature Effect
  • ± (0.1 % of Span + 0.35 % of URL) Per 28° C (50° F) - Capsule L Ambient Temperature Effect

Update Time

  • Pressure: 45 milliseconds

Vibration Effect

  • < ± 0.1 % of URL - Per IEC 60770-1 with Low Vibration Level (10-60 Hz, 0.15 mm Displacement / 60-500 Hz 2 G)
  • < 0.1 % of URL - Per IEC 60770-1 with High Vibration Level (10-60 Hz, 0.21 mm Displacement / 60-2,000 Hz 3 G)

Wetted Materials

  • 316L Stainless Steel - Capsule
  • F316L Stainless Steel - Capsule

Zero Offset

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

Documentation

Data Sheets

Brochure

Certificate

Manual

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