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EJA120A Differential Pressure Transmitter
Brand: Yokogawa Electric CorporationThe High Performance Draft range differential pressure transmitter model EJA120A outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure.
Model EJA120A also features remote setup and monitoring through communications with the BRAIN™ terminal and CENTUM CS™ or XL™ or HART 275 host.
Features- 0.2% Accuracy (0.1% Accuracy available with /HAC option)
- 300 msec Response Time (with /F1 option)
- True Draft Range design
Specifications
Accuracy
- ± 0.1 % of Span - High Accuracy (Including the Effects of Zero-based Linearity, Hysteresis, & Repeatability)
- ± 0.2 % of Span (Including the Effects of Zero-based Linearity, Hysteresis, & Repeatability)
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
- -25° to 80° C (-13° to 176° F)
Approvals & Certifications
- Leak Test
- Mill Certificate
- Pressure Test
Approvals & Certifications
- CSA - Explosion-proof & Intrinsically Safe
- EMC - EN 61326-1 Class A, Table 2, EN 61326-2-3
- FM - Explosion-proof & Intrinsically Safe
- IECEx - Flameproof & Intrinsically Safe
- NAMUR NE43
- PED 97/23/EC - Sound Engineering Practice
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 - Amplifier Damping Time Constant
Diaphragm Material
- Hastelloy C-276
Distance
- Up to 2 Kilometers (1.25 Miles) - Communication Distance
Drain, Vent Valves & Plug
- ASTM Grade 316
- SUS316 - Name Plate & Tag, Mounting Bracket
Electrical Connectors
- 1/2” NPT Female
- Blind Plug
- G 1/2” Female
- M20 Female
- PG13.5 Female
Electrical Protection
- Lightning Protection
Enclosure Finish
- Epoxy Resin-Baked Coating
- 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
- Silicone Oil
Flange Material
- JIS SUS630 - Cover Flange
- SCS14A - Cover Flange
Gasket Material
- Fluorinated Rubber - Process Connector Gasket
- PTFE Teflon - Capsule & Process Connector Gasket
Humidity
- 5 to 100 % Relative Humidity at 40° C (104° F)
Input Impedance
- 10 kiloohms or more at 2.4 kHz
Length
- 1.33” (34 mm) - Standard
- 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 - Digital Communication
- 3.3 MH or Less - Load Inductance
Materials of Construction
- 304 Stainless Steel - Name Plate & Tag, Mounting Bracket
- SECC Carbon Steel - Mounting Bracket
Mounting
- 2” Pipe 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 MR-0175
NPT Connection
- 1/2” NPT Female
- 1/4” NPT Female
Nut & Bolt Material
- 630 Stainless Steel (SUS630)
- 660 Stainless Steel (SUH660)
- SCM435
O-Ring Material
- Buna-N - Cover O-Ring
- Fluororubber - Cover O-Rings
Operating Temperature
- -20° to 80° C (-4° to 176° F)
Output
- 3.8-20.5 mA - Output Signal Limits
- 4-20 mA DC - 2-Wire
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
- SCS14A
Process Temperature
- -25° to 80° C (-13° to 176° F)
Response Time
- 0.3 second, Max.
Supply Pressure
- psi: -7.25 to 7.25 (kPa: -50 to 50, bar: -0.50 to 0.50)
Supply Voltage
- 10.5-30 Vdc - Intrinsically Safe, Typical N, Non-Incendive or Non-Sparking Typical
- 10.5-32 Vdc - Lightning Protector
- 10.5-42 Vdc - General Use & Flameproof Typical
- 16.4 Vdc - Digital Communications BRAIN & HART
- 24 Vdc up to 570 ohms Load
Temperature Effect
- ± (0.15 % of Span + 0.20 % of URL) Per 28° C (58° F) - Ambient Temperature Effects
UNF/UNC Connection
- 7/16”-20 UNF Female
Update Time
- 0.125 second
Wetted Materials
- ASTM Grade 316L - Capsule
- SUS316L - Capsule
- SUSF316L - Capsule
Zero Offset
- External Zero is Continuously Adjustable with 0.01 % Incremental Resolution of Span
