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Yokogawa Wireless Pressure Transmitter, EJX438B

EJX438B Wireless Pressure Transmitter

Brand: Yokogawa Electric Corporation
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Diaphragm seals are used to prevent process medium from entering directly into the pressure sensing assembly of the differential pressure and pressure transmitters, they are connected to the transmitter using capillaries filled with fill fluid. 

EJX438B Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas, or steam flow, as well as liquid level, density and pressure. 

EJX438B transmit not only process variables but also the setting parameters using wireless signal.

The transmitters run on internal batteries, and the installation cost can be decreased since hard wiring is not required. The communication protocol is compliant with ISA100.11a protocol specifications.
Features
  • Long Life Battery Design
    • Ultra low current consumption design using two high capacity lithium-thionyl chloride batteries provide wireless operation for years.
  • Security Assured Wireless Network Joining
    • Infrared communication between the devices for wireless network configuration and parameter setting.
  • Quick Update Time
    • Selectable from 0.5 second to 60 minutes for measured process value to publish wirelessly.

Specifications

Brand

Accuracy

  • ± (0.1 + 0.005 URL/Span) % of Span - Measurement Span A & B (Includes Terminal-based Linearity, Hysteresis & Repeatability)
  • ± 0.15 % of Span - Measurement Span A & B (Includes Terminal-based Linearity, Hysteresis & Repeatability)
  • 1 MPa or Higher: ± 0.2 % of Span - Absolute Pressure

Ambient Temperature Range

  • -10° to 60° C (14° to 140° F) - Fluorinated Oil
  • -15° to 60° C (5° to 140° F) - Silicone Oil
  • -30° to 60° C (-22° to 140° F) - LCD Visible Range
  • -40° to 60° C (-40° to 140° F) - Ethylene Glycol

Approvals & Certifications

  • ATEX Intrinsically Safe
  • CE: ETSI EN 300 328, ETSI EN 301 489-1, ETSI EN 301 489-17
  • CSA Intrinsically Safe
  • EMC: EN 61326-1 Class A, EN 61326-2-3
  • FCC - Regulation Conformity of the Wireless Module
  • FM Intrinsically Safe
  • IC - Regulation Conformity of the Wireless Module
  • IECEx Intrinsically Safe
  • PED 97/23/EC & 2014/68/EU - Sound Engineering Practice

Capillary Length

  • 3.3 to 32.8 feet (1 to 10 metres)

Capillary Material

  • 316 Stainless Steel

Communication

  • Data Rate: 250 Kbps - Wireless

Damping Adjustment

  • 0 seconds Default - Software Damping

Dead Time

  • 100 ms (Nominal)

Diagnostics

  • Amplifier Failure - Self Diagnostics
  • Battery Alarm - Self Diagnostics
  • Capsule Failure - Self Diagnostics
  • Configuration Error - Self Diagnostics
  • Over-Range Error for Process Variables - Self Diagnostics
  • Wireless Communication Alarm - Self Diagnostics

Diaphragm Material

  • 316L Stainless Steel
  • Hastelloy C-276
  • Tantalum
  • Titanium

Display

  • 5-Digit Numerical Display
  • 6-Digit Unit Display
  • Bar Graph

Drain, Vent Valves & Plug

  • 316 Stainless Steel (Hoop)
  • PTFE Teflon (Filler)

Electrical Connectors

  • 1/4" NPT - Vent/Drain Plugs
  • R: 1/4" - Vent/Drain Plugs

Enclosure Finish

  • Anti-Corrosion Coating

Enclosure, Body Material

  • Aluminum Alloy - Low Copper Cast with Polyurethane Paint

Environmental Protection

  • IP66
  • IP67
  • NEMA 4X

Fill Material

  • Ethylene Glycol
  • Fluorinated Oil
  • Silicone Oil

Flange Material

  • 304 Stainless Steel - Process Flange, Protection Tube (PVC-Sheathed)
  • 316 Stainless Steel - Process Flange, Name Plate & Tag (Tag Plate Wired Onto Transmitter)
  • ASTM CF-8M - Cover Flange
  • JIS S25C - Process Flange

Flange Size - 1-1/2” (DN 40)

  • 1-1/2" (DN 40) - 150# ANSI / JPI
  • 1-1/2" (DN 40) - 300# ANSI / JPI
  • 1-1/2" (DN 40) - 600# ANSI / JPI
  • 1-1/2" (DN 40) - JIS 10K
  • 1-1/2" (DN 40) - JIS 20K
  • 1-1/2" (DN 40) - JIS 40K
  • 1-1/2" (DN 40) - JIS 63K
  • 1-1/2" (DN 40) - PN 10
  • 1-1/2" (DN 40) - PN 16
  • 1-1/2" (DN 40) - PN 25
  • 1-1/2" (DN 40) - PN 40
  • 1-1/2" (DN 40) - PN 64

Flange Size - 2” (DN 50)

  • 2" (DN 50) - 150# ANSI / JPI
  • 2" (DN 50) - 300# ANSI / JPI
  • 2" (DN 50) - 600# ANSI / JPI
  • 2" (DN 50) - JIS 10K
  • 2" (DN 50) - JIS 20K
  • 2" (DN 50) - JIS 40K
  • 2" (DN 50) - JIS 63K
  • 2" (DN 50) - PN 10
  • 2" (DN 50) - PN 16
  • 2" (DN 50) - PN 25
  • 2" (DN 50) - PN 40
  • 2" (DN 50) - PN 64

Flange Size - 3” (DN 80)

  • 3" (DN 80) - 150# ANSI / JPI
  • 3" (DN 80) - 300# ANSI / JPI
  • 3" (DN 80) - 600# ANSI / JPI
  • 3" (DN 80) - JIS 10K
  • 3" (DN 80) - JIS 20K
  • 3" (DN 80) - JIS 40K
  • 3" (DN 80) - JIS 63K
  • 3" (DN 80) - PN 10
  • 3" (DN 80) - PN 16
  • 3" (DN 80) - PN 25
  • 3" (DN 80) - PN 40
  • 3" (DN 80) - PN 64

Flange Size - 4” (DN 100)

  • 4" (DN 100) - 150# ANSI / JPI
  • 4" (DN 100) - 300# ANSI / JPI
  • 4" (DN 100) - JIS 10K
  • 4" (DN 100) - JIS 20K
  • 4" (DN 100) - JIS 40K
  • 4" (DN 100) - PN 10
  • 4" (DN 100) - PN 16
  • 4" (DN 100) - PN 25
  • 4" (DN 100) - PN 40

Fluid Specific Gravity

  • 0.94 to 1.09 - Silicone Oil
  • 1.90 - Ethylene Glycol
  • 1.90 to 1.92 - Fluorinated Oil

Frequency

  • 2,400 to 2,483.5 MHz License Free ISM Band - Wireless

Function

  • Software Download Functions

Gasket Material

  • 316 Stainless Steel
  • PTFE

Humidity

  • 0 to 100 % RH - Ambient Humidity Limits

Media

  • Gas
  • Liquids
  • Steam

Mounting

  • 2" (50.8 mm) Pipe

Mounting Position

  • Horizontal

NACE & NIST

  • NACE MR-0175 / ISO 15156, MR-0103

Nut & Bolt Material

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

Output

  • Wireless (ISA100.11a Protocol) 2.4 GHz Signal

Output Function

  • Linear Output

Power

  • Maximum

Power Supply

  • 7.2 V, 19 Ah Two Lithium-Thionyl Chloride Battery

Pressure Range

  • bar: -1 to 160
  • MPa: -0.1 to 16
  • psi: -14.5 to 2,300

Pressure Type

  • Absolute
  • Gauge

Process Connection Style

  • Extended Typical
  • Flush Typical

Process Temperature

  • -20° to 120° C (-4° to 248° F) - Fluorinated Oil
  • -30° to 310° C (-22° to 590° F) - Silicone Oil
  • -50° to 100° C (-58° to 212° F) - Ethylene Glycol

Response Time

  • 200 ms

Ring Material

  • 316 Stainless Steel (Hoop)
  • PTFE Teflon (Filler)

Span - Minimum

  • psi: 73 (MPa: 0.5, bar: 5)

Supply Pressure

  • psi: 0.38 (kPa: 2.7, bar: 0.027) - Silicone Oil
  • psi: 14.5 (kPa: 100, bar: 1) - Ethylene Glycol
  • psi: 7.4 (kPa: 51, bar: 0.51) - Fluorinated Oil

Temperature Effect

  • ± (0.5 % of Span + 0.025 % of URL) Per 25° C (50° F) Change - Ambient Temperature Effect for Measurement Capsule A & B

Update Time

  • 0.5 to 3,600 seconds - Intermittent Measurement
  • 100 ms - Continuous Measurement

Wetted Materials

  • 316L Stainless Steel
  • Hastelloy C-276
  • Tantalum
  • Titanium

Zero Offset

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

Documentation

Data Sheets

Brochure

Manual

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