The high performance EJX910A multivariable

transmitter features multi-sensing technology with a

single-crystal silicon resonant sensor that outputs the

measured differential pressure, static pressure and

process temperature, which covers multiple protocols:

HART, FOUNDATION fieldbus and RS485 Modbus.

Additionally the HART protocol and FOUNDATION

fieldbus protocol types are suitable to measure

dynamically calculated and fully compensated mass

flow for liquid, gas, or steam. 4 to 20 mA DC signal

output is available in HART protocol type.

FDT/DTM* standard conforming software is available

for transmitter configuration. FSA120 (FlowNavigator®)

is used for flow configuration of the HART protocol

and FOUNDATION fieldbus protocol types.

*: FDT (Field Device Tool): Defines the system environment

in which the DTM runs.

DTM (Device Type Manager): The application which

defines the graphical user interface (GUI) specific to the

device.

Key features:

[HART protocol type]

• 1.0% mass flow rate accuracy over 1:10 flow range

(In case of uncalibrated differential producer (Orifice))

• HART7: Orifice, Nozzle, Venturi, Multiport Averaging

Pitot and Cone meters primary devices are supported

• HART5: Orifice, Nozzle and Venturi primary devices

are supported

• Advanced diagnostic function (option)

• Simultaneous dual output of 4 to 20mA and pulse

signals.

• HART protocol revision selectable from 5 (HART 5)

or 7 (HART 7)

• Long tag supporting up to 32 characters (HART 7)

• Enhanced burst mode and event notification(HART 7)

• SIL2 for safety requirement

Note: HART 5 stands for HART protocol revision 5

HART 7 stands for HART protocol revision 7

[FOUNDATION Fieldbus protocol type]

• 1.0% mass flow rate accuracy over 1:10 flow range

(In case of uncalibrated differential producer (Orifice))

• Orifice, Nozzle and Venturi primary devices are

supported

• Advanced diagnostic function (option)

• Various function blocks available; 5 AIs, AR, IT, SC,

and IS as standard. PID as an optional feature.

• Cyclically displays up to 10 variables

• Software download function (option)

[Modbus protocol type]

• RS485 Modbus protocol type provides easy multisensing

data transmission to the flow computers.

• The process data status is provided for each

measured differential pressure, static pressure and

process temperature. It is easy to implement process

data diagnosis.

• Cyclically displays up to 16 variables including RTU

management data.

• Up to 32 transmitters can be connected by multi-drop

communication.

• 32 characters long tag and squawk are supported for

easy identification of transmitters.

□ PERFORMANCE SPECIFICATIONS

Zero-based calibrated span output, and silicone oil,

unless otherwise mentioned.

For FOUNDATION Fieldbus and Modbus protocol types,

use calibrated range instead of span in the following

specifications.

Specification Conformance

EJX series ensures specification conformance to at

least ±3σ.

Mass Flow (For Measurement Function Code B of

HART and FOUNDATION Fieldbus protocol types)

Mass Flow Reference Accuracy

±1.0% of Mass Flow Rate over 10:1 flow range

(100:1 DP range) for liquids and gases.

Totalized Mass Flow Reference Accuracy

1.0% of Total Mass Flow.

Note: Assume 100:1 DP range for liquids and gases.

Conditions for mass flow accuracy

(1) Auto compensation mode.

(2) M and H capsule

(3) Uncalibrated differential producer (Orifice) installed

based on the following standards. *1

(4) Uncertainties for discharge coefficient, primary

device bore, pipe diameter, and gas expansion

factor defined on following standards. *1

(5) Density uncertainty less than 0.1%.

*1: Standards: ISO5167-1 1991, ISO5167-2 2003,

ASME, MFC-3M 1989, AGA No.3 1992

The “►” marks indicate the most typical selection for each specification.

*1: Users must consider the characteristics of selected wetted parts material and the influence of process fluids. The use of inappropriate materials can result in the leakage of corrosive process fluids and cause injury to personnel and/or damage to plant facilities. It is also possible that the diaphragm itself can be damaged and that material from the broken diaphragm and the fill fluid can contaminate the user’s process fluids. Be very careful with highly corrosive process fluids such as hydrochloric acid, sulfuric acid, hydrogen sulfide, sodium hypochlorite, and high-temperature steam (150°C [302°F] or above). Contact Yokogawa for detailed information of the wetted parts material.

*2: For External temperature input code 0 (Fixed temperature) .

*3: Recommended External Temperature Input Cable is as shown in Table 4. RTD is not provided.

*4: Specify when using conduit for RTD connection.

*5: Preset external temperature value is used for density compensation.

*6: Material of a blind plug is aluminum alloy or 304 SST

*7: Not applicable for Amplifier housing code 2.

*8: Output signal code E: HART 5.

*9: Output signal code J: HART 5 or HART 7 selectable. Specify HART 5 or HART 7 when ordering. (Output signal code J is recommended for HART communication.)

*10: Refer to table 6 whether the cable glands are attached or not