1. Level the flow meter. Connect the flow meter outlet to a calibration bottle (air tight jar) full of water. Inlet of flow meter is open to atmosphere. The jar should have a stop cock for the release of water.
2. Ensure that all joints are sound
3. Initially remove a small quality of water to purge the system and allow the flow meter reading to come to rest.
4. Note the initial reading of the flow meter.
5. Now release 3 litres of water into a graduated jar and note the final reading of the flow meter. The volume shown by the flow meter should be equal to the volume of water released from the calibration bottle. If not so, adjust the level of distilled water in the flow meter. If volume shown by the flow water is more then put some water into flow meter and if less, then take out some water from the flow meter which should be equal to the difference in reading.
6. Now the flow mete is calibrated to the required accuracy of ± 0.5 percent. For this purpose, graduated jar should have a minimum graduation of 10 ml.
More details
2. Ensure that all joints are sound
3. Initially remove a small quality of water to purge the system and allow the flow meter reading to come to rest.
4. Note the initial reading of the flow meter.
5. Now release 3 litres of water into a graduated jar and note the final reading of the flow meter. The volume shown by the flow meter should be equal to the volume of water released from the calibration bottle. If not so, adjust the level of distilled water in the flow meter. If volume shown by the flow water is more then put some water into flow meter and if less, then take out some water from the flow meter which should be equal to the difference in reading.
6. Now the flow mete is calibrated to the required accuracy of ± 0.5 percent. For this purpose, graduated jar should have a minimum graduation of 10 ml.
More details