Esdun Industrial 
The EJX-A series is Yokogawa’s premium performance line of DPharp transmitters. Released in 2004, it offers the performance and stability needed in demanding applications. The EJX-A series performance makes it the thoroughbred of the DPharp family of pressure transmitters.
The EJX930A multivariable transmitter is a remarkable innovation in multi-sensing technology. It makes optimal use of the unique characteristics of the DPharp sensor to give you greater insight into your process.
EJX930A features include:
Mass Flow Version:
- Orifice, Nozzle and Venturi primary devices are supported
- For HART7 protocol, Multiport Averaging Pitot and Cone meters are supported additionally
- ±1.0% mass flow rate accuracy
(In case of uncalibrated differential producer (Orifice)) - Fully compensated mass flow
- Mass Flow Totalizer with ±1.0% accuracy
- Pulse / Contact output
- TUV SIL 2/3 Certification
Multi-Sensing Version:
- ±0.04% Differential Pressure Accuracy
- ±0.1% Static Pressure Accuracy
- ±0.9°F External Temerature Accuracy
- TUV SIL 2/3 Certification
Explore how the EJA930A can help you Boost your bottom line.
About OpreX
OpreX is the comprehensive brand for Yokogawa’s industrial automation (IA) and control business and stands for excellence in the related technology and solutions. It consists of categories and families under each category. This product belongs to the OpreX Field Instruments family that is aligned under the OpreX Measurement category.
EJX930A Overview
Refer to the General Specification sheet located under the ‘Downloads’ tab for detailed specifications.
| Measurement Types | |
|---|---|
| Variable | Mass Flow Differential Pressure (DP) Static Pressure (SP) External Temperature (from RTD) |
| Reference Accuracy | |
| Mass Flow | ±1.0% of Range (In case of uncalibrated differential producer (Orifice)) |
| DP | ±0.04% of Span |
| SP (Absolute) | ±0.1% of Span |
| External Temperature | ±0.9°F |
| Long Term Stability (All Normal Operating Conditions) | |
| DP | ±0.1% of URL per 15 years |
| Response Time | |
| DP | All Capsules: 250 ms |
| SP | All Capsules: 200 ms |
| Maximum Pressure Limit (MWP) | |
| All Capsules | 4,500 psi |
| Over-pressure Effect | |
| DP | ±0.03% of URL |
| Specification Conformance | |
| EJX-A Series | ±3σ |
| Burst Pressure (Absolute) | |
| All Capsules | 10,000 psi |
EJX930A Communication Protocols
HART Protocol
- Saturated Steam Mode : External temperature can be calculated and output from static pressure by using the built-in steam table (IAPWS-IF97) without external temperature input. (HART Protocol Revision 7 and Device Revision 12 or later)
- Orifice, Nozzle and Venturi primary devices are supported
- For HART7 protocol, Multiport Averaging Pitot and Cone meters are supported additionally
- Simultaneous dual output of 4 to 20mA and pulse signals
- HART protocol revision selectable from HART 5 or HART 7
- SIL 2 certified standard
FOUNDATION Fieldbus Protocol
- 1.0% mass flow rate accuracy over 1:10 flow range
- Orifice, Nozzle and Venturi primary devices are supported
- Various function blocks available: 5 AIs, AR, IT, SC, and IS standard
- PID is an optional feature
- Cyclically displays up to 10 values
Modbus Protocol
- RS485 Modbus protocol provides easy multi-sensing data transmission to flow computers
- The process data status is provided for each measured variable: Differential Pressure, Static Pressure, and Process Temperature – making it easy to implement process data diagnosis
- Cyclically display up to 16 variables including RTU management data
- Up to 32 transmitters can be connected by multi-drop communication
- 32 character tag and squawk are supported for easy identification of transmitters
