How do you calibrate a deadweight tester?
How do you calibrate a deadweight tester?
Deadweight tester calibration The basic steps to perform calibration with a deadweight tester include attaching a pressure measurement device to the tester, applying a series of weights to generate known pressures, and comparing the known pressures to pressure readings from the device under test.
How do you calibrate dead weight?
Pressure is added with an internal pump or screw press until the piston holding the weights begins to float. The piston and weight are spun by hand to minimize friction. While the piston is floating the reading on the device under test is compared to the pressure corresponding to the sum of the selected weights.
How is deadweight tester calculated?
The basic equation for the deadweight tester is:
- P = F/A.
- P = the pressure being derived.
- F = the force applied by the weights.
- A = the effective area of the piston cylinder.
- PL = PA x GL/G.
- PL = Actual Pressure at the local gravity of the test site.
- PA = Actual Pressure as shown in the Calibration Report.
How do you calibrate C type Bourdon?
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. 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 Bourdon tube.
How are pressure gauges calibrated?
Calibration is the procedure of comparing a reference with a known error margin against a device (for example a pressure gauge) under test. If the device doesn’t match the reference, then we adjust it to match, or at least come close, the desired measuring accuracy.
What is priming in dead weight tester?
Pressure generation To increase pressure in a hydraulic deadweight tester a priming pump is used. Fluke Calibration P3100 and P3200 Series Deadweight Testers have a priming pump included standard in the device. The priming pump can also be used to remove gas from the system.
What is C type Bourdon tube?
1. C-Type Bourdon Tube. This instrument is by far the most common device used to indicate gauge pressure throughout the oil gas industry. A bourdon tube obey Hookes Law, that is within elastic limits. Its free end will experience a movement that is proportional to the fluid pressure applied.