Description

YOKOGAWA Differential Pressure Transmitter EJA110E

Differential Pressure Transmitter-The EJA-E series of transmitters is Yokogawa’s most recent evolution of the DPharp family of pressure transmitters. Released in 2012, it combines the ruggedness and success of the work-horse EJA-A series with the performance of the thoroughbred EJX-A series to deliver the type of product you have come to expect from Yokogawa.

OVERVIEW:-

♦ Digital Performance-The performance and stability of Yokogawa’s DPharp digital sensor are twice as high as those of the rivals’ analog sensors. The DPharp makes advantage of cutting-edge manufacturing and design techniques for IC chips. Analog sensors are built using outdated design principles. Despite their superior performance, current DPharp sensors outperform analog ones. Your required measurements will be provided via a Yokogawa transmitter with a DPharp digital sensor.

♦ Accuracy Under All Operating Conditions-

The DPharp sensor from Yokogawa has the capacity to measure the sensor temperature, static pressure, and differential pressure all from a single sensor. Yokogawa’s transmitter can instantly correct the DP measurement for the Temperature Effect and Static Pressure Effect given these three pieces of process data. This raises the accuracy of the DP measurement and is known as dynamic compensation.Analog sensors from competitors can only measure the temperatures of the DP and Sensor. So, theirs can account for the effects of temperature, but because the SP measurement is absent, it cannot account for the effects of static pressure.

♦ 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.

♦ 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.

♦ 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.