Re: How To Calibrate Pressure Guages On Line?
I assume that when you say "can not be removed" you mean can not be removed from installed port.
If so, then you can install another port adjacent to the existing port. You can then install a master gauge and calibrate the line gauge to the master. Or, after installing the second port, you could insert a shut-off valve between the gauge and system pressure. You could then shut off the system pressure to the working gauge and insert a portable dead weight tester in the line and calibrate the gauge.
Either way is acceptable, however, in the second method, once the changes are made, you do not have to shut down the machine in order to install the a calibration device.