Alnor AXD 530, Owner'S Manual, Page: 7 / 18

6
• Make sure there is no air flow past a
Pitot-static probe (also verify that none
of the tubing is pressurized by acciden-
tal squeezing).
• Press the ZERO key until [ ]
appears on the display.
The instrument will automatically zero its readings.
Repeat this procedure if necessary, because at high
resolutions the AXD530 will read small pressure
changes.