I read some spec it says pressure transmitter should have +-??% zero effect of upper range limit, can someone explain what it means?

Also is it true most field instrument uses female connection while pressure gauge uses male connection? Any other instrument that usually comes in male connection (pressure transmitter?)

Also saw something about field effect. What's that?

 

1) I think they are refering to the zero shift whan you change the span setting. In the bad old days you had to do zero & span several times to get them both right, nowdays with microprocessors thats not so common thank goodness.

2) There are quite a few pressure transmitters with male connection, usually intended for direct mounting in the isolation valve (no mounting brackets required)

3) Field Effect Transistor or perhaps the zero shift you sometimes get between the calibration shop and installation. e.g. flange mount pressure transmitters sometimes shift a little. Anything with a filled capillary will shift due to changes in elevation (I don't mean ASL)

Roy

 

Another point is that in an instrument with an adjustable scan, there are some effects that depend on the maximum span of which the instrument is capable rather than the calibrated setting. So some portions of the overall accuracy spec will refer to an error component as a % of URL rather than a % of full scale.

Bruce.