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YOKOGAWA EJA310 Absolute Pressure Transmitter for oil project
Introduction 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 XL™ or HART® 275 host. Functional specifications 1)Zero Adjustment Limits Zero can be fully elevated or suppressed, within the Lower and Upper Range Limits of the capsule. 2)External Zero Adjustment External zero is continuously adjustable with 0.01 % incremental resolution of span. Span may be adjusted locally using the digital indicator with range switch. 3)Mounting Position Effect Rotation in diaphragm plane has no effect. Tilting up to 90 will cause zero shift up to 0.4 kPa {1.6 inH2O} which can be corrected by the zero adjustment. 4)Output Two wire 4 to 20 mA DC output with digital communications, linear or square root programmable. BRAIN or HART FSK protocol are superimposed on the 4 to 20 mA signal. 5)Failure Alarm Output status at CPU failure and hardware error; Up-scale: 110%, 21.6 mA DC or more(standard) Down-scale: -5%, 3.2 mA DC or less-2.5%, 3.6 mA DC or less (Optional code /F1) Note: Applicable for Output signal code D and E 6) Damping Time Constant (1st order) The sum of the amplifier and capsule damping time constant must be used for the overall time constant. Amp damping time constant is adjustable from 0.2 to 64 seconds.
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Specifiction Packing
  • EJA310A Absolute Pressure Transmitter L Capsule M Capsule A Capsule Range 0 to 10 kPa abs 0 to 130 kPa abs 0 to 3 MPa (0 to 2.95 inHg abs) (0 to 38 inHg abs) (0 to 430psia) Span 0.67 to 10 kPa 1.3 to 130 kPa 0.03 to 3 MPa (0.2 to 2.95 inHg) (0.38 to 38 inHg) (4.3 to 430 psi) Accuracy 0.2% 0.15% 0.15% Degrees of protection IP67, NEMA 4X, and JIS C0920 immersion proof Certificates FM, CENELEC ATEX, CSA, IECEx Output 4 to 20 mA DC or FOUNDATION™ fieldbus or PROFIBUS PA 2-wire system with digital communication Supply voltage BRAIN and HART:10.5 to 42 V DC (10.5 to 30 V DC for Intrinsically safe type) Fieldbus:9 to 32 V DC (9 to 24 V DC for Entity model and 9 to 17.5 V DC for FISCO model) Ambient temperature -40 to 85 deg C (-40 to 185 deg F) (general use type) -30 to 80 deg C (-22 to 176 deg F) (with integral indicator) Process temperature -40 to 120 deg C (-40 to 248 deg F) (general use type) for M and A capsule -40 to 100 deg C (-40 to 212 deg F) (general use type) for L capsule Maximum overpressure 500 kPa abs 500 kPa abs 4.5 MPa abs (72psia) (72psia) (645psia) Mounting 2-inch pipe mounting Wetted parts material Capsule SUS316L (Diaphragm material is Hastelloy C-276) Cover flange SUS316 Housing Cast aluminum alloy or SUS316 equivalent stainless steel (optional)