Automatic zero calibration for EJA118 double-flange transmitter
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For EJA double flange transmitters, I’m not sure which HART function can be used to calibrate the two flanges, to prevent air from getting between them and to enable automatic zeroing. It seems that BT200 might work for this purpose; could someone please give some advice?
Set the zero point when both positive and negative pressure measurements are vented.
Generally, the BT200 will suffice. After draining the positive and negative pressures, connect the BT200 to the terminals, and follow the instructions provided with the BT200 to zero it out!
When calibrating an EJA double-flange transmitter with another double-flange transmitter, both flanges are vented, and then the \"Sensor Calibration – Zero Adjustment\" function in HART can be used to automatically set the current instrument status to zero.