What is the difference between zero adjustment for ordinary differential pressure flowmeters and negative drift for double-flange level gauges? Why doesn’t direct zeroing with double flanges work?
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What is the difference between zero adjustment for ordinary differential pressure flowmeters and negative drift for double-flange level gauges? Why doesn’t direct zeroing with double flanges work?
Zero-point migration was a setting method for non-intelligent meters in the past. Now the instruments are intelligent, allowing for direct setting of the zero point and range.
Migration involves changing the position of the zero point, with a relatively large range of adjustment, while zeroing also involves changing the position of the zero point, but only within a smaller range of adjustment.
The zero calibration corrects the zero drift of the gauge, eliminating errors in the gauge. Migration is about changing the range of a table; it’s an installation issue, as mentioned above, it’s a different concept