Can a micro-differential pressure transmitter be replaced by a regular differential pressure transmitter?
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For the Yokogawa EJA gauge, if there is no micro-differential pressure gauge available, can a regular transmitter be used as a substitute? What effects will changing the range have?
eja120a is a micro-differential pressure transmitter; whether it can be used as a substitute depends on whether the minimum range of a conventional differential pressure transmitter can meet the requirements. Using it as a substitute will affect accuracy
Reply to 2# ROSEHOOD: Thank you for the guidance. I’m now using the eja110a with a range of 0---10kpa instead of the eja120a with a range of 0---0.7kpa. The range can be changed, and it’s sufficient for my needs. Will this affect the accuracy?
It definitely affects accuracy; generally, the range of use should be between 50% and 75% of the adjustable range, and the same applies to intelligent devices as well
The EJA is generally quite useful; if it isn’t used properly, consider using a 3051 instead.
Does a differential pressure transmitter measure differential pressure or pressure? As long as the pressure measurement meets the required accuracy, it’s fine; pressure cannot be used as a substitute for differential pressure measurement.
It is recommended that the original poster stop using it, as it will definitely affect accuracy. A few hundred pascals – that’s the force generated by a strong breath; such imprecision is worse than no measurement at all.
If the transmitter has no minimum range limitation, it can be used without problems, but its accuracy will not be satisfactory. Additionally, when the pressure is very low, using a transmitter with a large range causes the zero point to shift easily; such a transmitter will lose accuracy within just a few days.