The basic manometer is a U-shaped tube that measures pressure by the height of the liquid it will support. ... These systems also feature a microprocessor, as well as outputs for process control and data transfer, which often means that digital manometer tools require regular calibration.

How often do digital manometers require calibration?

In general the accepted calibration interval for digital manometers and pressure meters is 12 calendar months.

How do you calibrate a manometer?

Connect one end of the manometer to the transducer pressure port (normally the + port). Secure the ruler or tape measure to the surface behind the U-tube. Raise or lower the free end of the tube to increase or decrease the fluid head applied to the sensor.