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 EJX910A 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.
EJX910A 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 EJA910A 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.
Details
Mounting
Plants run better with Yokogawa differential pressure transmitters.
At it's heart, Yokogawa's Differential Pressure Transmitter with DPharp digital sensor offers the performance and device intelligence needed to get greater insight into your process.
Digital Performance
Yokogawa's DPharp digital sensor offers twice the performance and stability of the competitor's analog sensors. The DPharp uses the latest in IC Chip-style design and manufacturing technology. Analog sensors are based on older design technology. Although analog sensors are good, the modern DPharp sensor out performs them. A Yokogawa transmitter with DPharp digital sensor will give you the consistent, reliable, accurate measurement you need.
Poor Performance = Lost Money
Accuracy Under All Operating Conditions
Yokogawa's DPharp sensor has the ability to measure the differential pressure (DP), static pressure (SP), and sensor temperature from a single sensor. Giving these three pieces of process data, Yokogawa's transmitter can compensate the DP measurement for Temperature Effect and Static Pressure Effect in real time. This is referred to as Dynamic Compensation and improves the DP measurement accuracy.
Competitor's analog sensors can only measure DP and Sensor temperature. So, theirs can compensate for temperature Effect; but, since the SP measurement is missing, it cannot compensate for Static Pressure Effects.
Poor Performance = Lost Money
Stability Under All Operating Conditions
Digital DPharp sensor provides stable measurement in all operation conditions.To some degree, all pressure sensors on the market provide stable measurement with variations in temperature and static pressure. But what happens when the sensor is over-pressured (pressure > sensor Upper Range Limit (URL)) - like occurs when a manifold is incorrectly sequenced during start-up or shutdown? Or a process upset? Analog sensors are actually damaged during these events requiring the transmitter to be recalibrated to return to accurate operation or even replaced. Yokogawa's transmitters can withstand large overpressure events. (*See the table below.) Once it returns to normal operating pressure (pressure < URL of the sensor), the transmitter will return to operation within the defined accuracy and stability specifications - no need to recalibrate. Basically, the Yokogawa DPharp sensor has a larger operational envelope compared to an analog sensor.
Poor Performance = Lost Money
| EJX910A | EJX930A | |
|---|---|---|
| MWP | 3,600 psi | 4,500 psi |
| Notes | - | - |
More Information
Save up to 20% on CAPEX spending using our transmitter’s multi-sensing capability.
Using digital communication, one Multivariable transmitter can supply your control system with Level (Primary variable), Blanket Pressure (Secondary variable), and Sensor Temperature (Third variable)—eliminating the need for multiple transmitters.
More Information = Found Money
Signal Characterization
Signal characterization is a versatile function available on all Yokogawa pressure transmitters. The function is used to compensate the analog 4 to 20 mA output signal for non-linear applications. Such applications include tank strapping or flow measurements; but, it can be used in any application where the relationship between the pressure input and the desired output signal are known. This feature can use up to 10-points.
Greater Flexibility = Found Money
Local Indicator
All of the process variable's measured by Yokogawa's transmitter can be displayed on the easy to read local indicator. The indicator can display any of the variables measured (DP, SP, Capsule temperature); alarm codes with short text; and a sweeping bar graph to give a graphical representation of the process. Fully programmable, the indicator is customizable for your needs. Unlike competitor's transmitters, the indicator is not driven off the 4 to 20 mA analog signal, but, exist on a separate circuit. This allow the display to operate independently from the output signal, so it can indicate information that maybe more useful at the transmitter location.
More information = Found Money
Standard Diagnostics
Yokogawa's transmitter has 40 self-diagnostic checks to ensure that everything is running smoothly within the transmitter. But, all transmitters on the market have a level self-diagnostic checks. However, Yokogawa has two that are not offered by competitors. First, the transmitter features a patented Back-check Technology that reverse checks all calculations in real-time. Second, the DPharp sensor is an active sensor. This means that the sensor is constantly supplying a signal even when the process has not changed. If the signal is lost from the sensor, the transmitter knows there is an issue. Competitor's analog sensors are passive. They do not supply a continual signal, so, is the sensor still working when there is no signal?
Good Diagnostics = Less Surprises
Advanced Diagnostics
Reduce unscheduled maintenance by 60%.
Predictive impulse line blocking and stream tracing diagnostics lets you see problems before they happen
Rugged Construction
Ruggedly constructed differential pressure transmitter can help your plant reduce failures. Yokogawa pressure transmitters have construction features that are designed to allow it to outlive your plant. Four-bolt pressure retaining design, Active DPharp sensor, Teflon coated 316L stainless steel flange gasket, and dual seal certified to ANSI/ISA 12.27.01 - all design features to extend the life of the transmitter.
Note: For conformance to NACE MR0175/MR0103, please refer to General Specifications of each model.
Ruggedness = Reliability
Over-pressure Protection
Yokogawa's DPharp pressure sensor has over-pressure protection from the simple robust design of the sensor itself. But, Yokogawa goes a step further and adds a mechanical system within the capsule to protect the transmitter from over pressure events. These events could be caused by anything from unexpected process surges to improperly sequenced manifolds.
Ruggedness = Reliability
Independent Verification
The Yokogawa pressure transmitter series' performance and reliability has been verified by independent third parties from around the world.
Functional Safety
All Yokogawa pressure transmitters are designed and certified to IEC61508:2010 Parts 1 through 7 and IEC61511:2004 Parts 1 through 3. They are certified for single transmitter use in SIL 2 safety applications and dual transmitter use in SIL 3 safety applications with no special option required. With Yokogawa's transmitters, no longer will you have to maintain two seperate inventories - one for production applications and one for safety applications.
Functional Safety = Reliability
Active Sensor Technology
The DPharp sensor is an active sensor. This means that the sensor is constantly supplying a signal even when the process has not changed. If the signal is lost from the sensor, the transmitter knows there is an issue. Competitor's analog sensors are passive. They do not supply a continual signal, so is the sensor still working when there is no signal? An active sensor is inherently safe.
Inherently Safe = Reliability
Patented Self-check System
Yokogawa's pressure transmitters as a patented real-time reverse check of the signal to ensure all calculations are preformed correctly. This system ensures that the transmitter is converting the signal from the sensor into the analog signal and digital protocol correctly.
Inherently Safe = Reliability
Yokogawa's DPharp pressure transmitters offer long-term stability and diagnostics to make your maintenance routine easy.
Extended Calibration Intervals
Yokogawa's pressure transmitters have a long-term stability under all operational conditions. As you gain experience with these transmitters, you will be able to extend the time between calibration checks.
Quicker Maintenance = Less Downtime
Multiple Communication Options
Yokogawa offers several platforms to communicate to your transmitter.
FieldMate is a PC based communication platform that can communicate with your transmitter and manage your entire instrument inventory.
FieldMate HHC is a traditional hand-held platform that allows you to take that information into the field.
Forgot your HHC? No problem. The LPS feature on the transmitter allows you to update 9 parameters without the use of an HHC.
Quicker Maintenance = Less Downtime
Simple Troubleshooting
When your transmitter is 'alarming', you do not have the time to look for the manuals and go through them trying to figure out what is wrong; you need to get the transmitter up and operating again as quick as possible. Yokogawa's pressure transmitters have a simple description of the error code available on the local display. This simple description may help you correct the problem and get back to making product quickly. If you need more help, the manual does have a full description of all codes and suggest corrective actions.
Quicker Maintenance = Less Downtime
Universal Mounting
Pressure transmitters on the market have several different flange configuration depending on the medium being measured (Gas or liquid). This requires plants that process both medium to maintain a stock of both types of configurations. Yokogawa's pressure transmitters offer a universal mount that can be configured to handle either Gas or Liquid; reducing your inventory of replacement transmitters.
High Inventory = Stagnant Money
Standard Industry Process Connections
Yokogawa's pressure transmitters use the industry standard IEC61518 process connection deminsions. This ensures you will not need proprietary manifolds or accessories that limit your design choices. The IEC61518 standard gives you the piece of mind that if you ever want to make a change in transmitter manufacturer, you can. Some competitors have proprietary process connections that do nothing more than lock you into buying their product as replacements.
No learning Curve = Smooth Change Over
EJX910A 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 | L-Capsule: 230 ms M and H capsule: 200 ms |
| SP | All Capsules: 200 ms |
| Maximum Pressure Limit (MWP) | |
| L-Capsule | 2,300 psi |
| M and H Capsule | 3,600 psi |
| Over-pressure Effect | |
| DP | ±0.03% of URL |
| Specification Conformance | |
| EJX-A Series | ±3σ |
| Burst Pressure (Absolute) | |
| All Capsules | 10,000 psi |
EJX910A 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
Valve Manifolds
Yokogawa offers a range of valve manifolds and accessories for combination with the DPharp EJX and EJA series transmitters in partnership with AS Schneider-Germany and WIKA/Micro precision-India.
Communicators
Yokogawa manufactures a communicator for your needs. Yokogawa communicators are available for BRAIN Protocol, HART Protocol, FOUNDATION Fieldbus, PROFIBUS PA, ISA100, or Modbus. All out communicators are compatible with Yokogawa products as well as other products on the market.
Pressure Calibrators
he Yokogawa CA700 Portable Pressure Calibrator uses the same DPharp sensor technology as our EJA-E and EJX-A series pressure transmitters. It provides an accurate and efficient calibration and verification tool for any pressure transmitter or other type of field device.
Communication Convertors
Yokogawa offers communication converters to convert secondary HART protocol variables to a 4 to 20 mA analog signal or all the HART variables to MODBUS RTU.
FieldMate FlowNavigator
FieldMate FlowNavigator™ is a PC-based software that is exclusively designed for use with the EJX910A / EJA930A. It uses FDT/DTM standards to enable users to configure mass flow and achieve accurate measurements with real-time full density compensation.
3rd Party RTD Sensors and Termowells
Direct-immersion RTD sensor (Thermowells Available)
Resources
DP Level transmitter configuration can be very time consuming. Yokogawa DPharp EJA/EJX Pressure transmitters realize reduction in man hours by smart level setup feature.
Yokogawa DPharp EJA/EJX Pressure transmitters do not need frequent re-zeroing due to superior long term stability, it contributes to reduce maintenance time.
Downloads
Brochures
Instruction Manuals
- EJX and EJA-E Series Differential Pressure and Pressure Transmitters Installation Manual *See Manual Change No. 22-17E, 22-24E (7.2 MB)
- ManualChange22-17E (192 KB)
- Manual Change No. 22-24E (186 KB)
- EJX910A and EJX930A Multivariable Transmitter *See Manual Change No. 23-11E (5.2 MB)
- EJX910A and EJX930A Fieldbus Communication Type *See Manual Change No. 21-35E Rev.1 (3.1 MB)
- EJX910A and EJX930A Multivariable Transmitter HART Communication (13.3 MB)
- EJX910A and EJX930A Multivariable Transmitter Modbus Communication Type (3.8 MB)
- EJX/EJA-E series NEPSI Certification[Option code: /NF2, /NF21, /NS21, /NS24 and /NS25] (720 KB)
- EJX/EJA-E Series UKEX Certification [Option code:/BF21,/BS21,/BU21,/BS26 and /BN26] (1.5 MB)
General Specifications
Technical Information
- Functional Safety Manual (730 KB)
Drawings
2D/3D Configurator
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