I have an endress hauser pressure transmitter. In transmitter display it shows accurate mA. But when i measure it by a multimeter it shows higher value. so what is the problem
If transmitter mA does not agree with your meter, it is a digital to analog converter issue in the transmitter. You can change that to agree with your meter. Assuming the meter is a high quality and suitable as a calibration standard. Also verify the transmitter is 4-20mA output and not digital. Digital will still give you a reading with your meter generally around 10-11 mA
If possible , change Terminal block unit of other transmitter same make and then check mA. If problem not solve … Then D/A converter is faulty.