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EJA530 pressure transmitter

EJA510A and EJA530A Absolute and Gauge Pressure Transmitters


Technical specification :

Stability : 0.1% of URL per 12 months

Output :
Two wire 4 to 20 mA DC output with digital communications. BRAIN or HART FSK protocol are superimposed 

on the 4 to 20 mA signa .


Ambient Temperature Limits :
(approval codes may affect limits)
-40 to 85 C (-40 to 185 F)
-30 to 80 C (-22 to 176 F) with LCD Display


Process Temperature Limits:
(approval codes may affect limits)
-40 to 120 C (-40 to 248 F)


Ambient Humidity Limits :
5 to 100 % RH @ 40 C (104 F)


Features :

absolute and gauge pressure transmitter model EJA510A and EJA530A can be used to measure liquid, gas, or steam pressure. Both output a 4 to 20 mA DC signal corresponding to the measured pressure, and also feature remote setup and monitoring through communications with the BRAIN™ terminal and CENTUM CS™ or µXL™ or HART® 275 host.



Working principle :

When the pressure acts directly on the surface of the diaphragm, the diaphragm is slightly deformed, and the high precision circuit on the diaphragm is converted to a slight linearity proportional to the pressure, which is proportional to the excitation voltage Signal, and then use a dedicated chip to convert the voltage signal to the industry standard 4-20mA current signal or 1-5V voltage signal.

As the measurement of the diaphragm using standard integrated circuit, which contains linear and temperature compensation circuit, so you can do high precision and high stability, the transmission circuit using a dedicated two-wire chip, can guarantee the output of two-wire  4-20mA current signal.



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