Yokogawa Draft Range Differential Pressure Transmitter, EJX120A
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EJX120A Draft Range Differential Pressure Transmitter

Brand: Yokogawa Electric Corporation
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The high performance draft range differential pressure transmitter EJX120A features single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam flow as well as liquid level, density and pressure. 

EJX120A outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. Other key features include quick response, remote set-up using communications, diagnostics and optional status output for pressure high/low alarm.

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 as complying with SIL 2 for safety requirement.
Features
  • Accurately: ± 0.09% Accuracy
  • Reliably: ± 0.15% per 1 year Stability
  • Quickly: 150 ms Response Time

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Specifications

Brand

Accuracy

  • ± (0.015 + 0.03 URL/Span) % of Span (Includes Terminal-based Linearity, Hysteresis & Repeatability)
  • ± 0.09 % of Span (Includes Terminal-based Linearity, Hysteresis & Repeatability)

Alarm

  • Down-Scale: -5 %, 3.2 mA DC or Less
  • Up-Scale: 110 %, 21.6 mA DC or more

Ambient Temperature Range

  • -25° to 80° C (-13° to 176° F)

Approvals & Certifications

  • Leak Test
  • Material Certificate
  • Pressure Test
  • SIL, SIL 2 SIL 3 IEC 61508: 2000, Part1 to Part 7
  • TÜV (Technischer Uberwachungsverein)

Approvals & Certifications

  • ATEX Flameproof & Intrinsically Safe
  • CSA Explosion-proof & Intrinsically Safe
  • EMC EN 61326-1 Class A, Table 2, EN 61326-2-3, EN 61326-2-5
  • FM Explosion-proof & Intrinsically Safe
  • IEC Ex Flameproof & Intrinsically Safe
  • NAMUR NE43
  • PED 2014/68/EU
  • PED 97/23/EC

BSP Connection

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

Cable Material

  • PVC

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 for Differential Pressure
  • User-Configurable Process High/Low Alarm for Differential Pressure

Diaphragm Material

  • Hastelloy C-276 - Capsule

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

  • Up 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 Rating

  • 120 mA DC, Max.

Enclosure Finish

  • Anti-Corrosion Coating
  • Mint-Green Paint (Munsell 5.6BG 3.3/2.9)

Enclosure, Body Material

  • ASTM CF-8M Stainless Steel
  • Cast Aluminum Alloy with Polyurethane

Environmental Protection

  • IP66
  • IP67
  • NEMA 4X

Fill Material

  • Silicone Oil

Flange Material

  • ASTM CF-8M - Cover Flange

Gasket Material

  • Fluorinated Rubber
  • PTFE Teflon

Humidity

  • 0 to 100 % Relative Humidity - Ambient Humidity

Input Impedance

  • 10 kiloohms or more at 2.4 kHz

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
  • 316 Stainless Steel - Name Plate & Tag

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-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

Output

  • 0-2 Vdc - Low Level
  • 3.6-21.6 mA
  • 4-20 mA DC (2-Wire)

Output Format

  • Transistor Output

Power Supply Effect

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

Pressure Range

  • Inches WC: -4 to 4
  • kPa: -1 to 1
  • mbar: -10 to 10
  • mmWC: -100 to 100
  • psi: -0.145 to 0.145

Pressure Type

  • Differential

Process Connection Material

  • ASTM CF-8M Stainless Steel

Process Temperature

  • -25° to 80° C (-13° to 176° F)

Response Time

  • 150 milliseconds

Screw Material

  • 316 Stainless Steel - Zero-Adjustment Screw & Set Screws

Stability

  • ± 0.15 % of URL Per Year

Supply Pressure

  • psi: -7.25 to 7.25 (kPa: -50 to 50, bar: -0.50 to 0.50) - Silicone Oil

Supply Voltage

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

Temperature Effect

  • ± (0.1 % of Span + 0.15 % of URL) - Ambient Temperature Effects Per 28° C (50° F) Change

Temperature Range

  • -25° to 80° C (-13° to 176° F)

Update Time

  • 45 milliseconds - Differential Pressure

Vibration Effect

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

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

Manuals

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