Calibration of a Pressure Gauge

Calibration of a Pressure Gauge

•  Pressure gauge with visible working mechanism to demonstrate how this type of pressure gauge works and how to calibrate it.
•  The apparatus is a gauge connected to a dead weight tester.  
•  Gauge has a transparent dial that allows students to see the working mechanism.  
•  The mechanism is a thin walled tube with an oval cross-section, bent into an arc.  
•  One end of the tube is held rigidly.This end admits pressure.  
•  To calibrate the gauge, students add weights to a platform on a dead weight tester.  
•  The weights put a known force on to a piston.  
•  They then remove the weights and record gauge readings.  
•  The piston has a known area, so students can calculate the pressure.
•  A flexible tube containing water transfers the pressure on the piston to the tube.  
•  Students add the weights in increments, recording pressure readings from the gauge at each increment.  
•  The other end of the tube, connected to a dial and pointer mechanism, is free to move.  
•  When the pressure in the tube increases, it tries to straighten and so moves the pointer by an amount proportional to the pressure increase.

Calibration of a Pressure Gauge ALTEC Laboratory Equipments and ALTEC Laboratory Instruments Tenders.