Regarding the issue of swapping positive and negative pressures for EJA transmitters.
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Regarding the issue of swapping positive and negative pressures for EJA transmitters. 1. The handheld operator BT200 for the EJA transmitters in the Brown protocol includes an option to switch between positive and negative pressure, and it has been confirmed to work well! ~ Does the 2HART protocol EJA transmitter model 375 have the function of switching between positive and negative pressure? Please introduce the support method! Thank you! I found the relevant output direction options in the HART communication protocol (1.4.2.8); neither OFF nor ON shows any effect! Doubt. No. . I hope those who know can explain in detail!
HART cannot change positive or negative pressure; I’ve tried it as well. Only BT200 can be used!
When debugging EJA instruments, it is best to use a BT200 terminal, after all, the protocol remains under one’s own control
The handheld controller of the Hart protocol cannot be modified to switch between positive and negative pressure sides. It can only be modified using his own BT200.
Then just change the physical location of the positive and negative pressure chambers – it’s very convenient too!
If the positive and negative pressures are reversed, it can be adjusted through migration
Reply to 6# *aohan0305: What is the method of migration? Just change the upper and lower limits directly?
It’s not migration; the pressure calculations for the positive and negative pressure chambers are simply changed
Eighth floor... can you be more specific? Not the kind of physical moving of the buttocks!
The issue of adjusting the direction of flow in migration scenarios: for example, if a flow range is 0–20 KPa and it is found that the instrument’s tubing is connected in the wrong direction, changing the instrument’s range to 0–20 KPa allows the instrument to function properly. Personally, I consider this to be only a temporary solution; once conditions permit, it is necessary to revert to the normal measurement method.
10th floor, thank you. I understand. The protocol has been changed to Brown’s protocol.