Wednesday, April 4, 2012

How Accurate are Your Pressure Gauges?

Almost once a week I find myself troubleshooting a problem with a water system. The majority of the times I am using pressure gauge readings as part of the troubleshooting. I have learned the hard way to be very skeptical of the accuracy of pressure gauges installed in the field. I estimate that 30% of the gauges I have encountered in the field are not accurate.

Often times the gauges I find to be inaccurate are the same ones that our plant operators record each day during their Operator Rounds. This puts into question the accuracy of much of the historical data for that gauge reading.

It is very good practice to verify the accuracy of your pressure gauges at least annually. Verifying the accuracy of gauges attached to a pump could be made part of the PM tasks for that pump.

The level of accuracy you require is up to the user. It can range from a quick check to verify that the gauge is functional and returns to zero when all pressure is removed. Or you may require the gauge to be accurate to within tenths of a pound using a test pump and an electronic calibrator like a Beamex.

Once you have verified its accuracy you should put a dated sticker on the back of the gauge to show when it was last tested.
Periodically verifying the accuracy of your pressure gauges will help ensure your operators have accurate data when troubleshooting or assessing the performance of your power plant or process system.

1 comment:

  1. Storage tank facilities technicians need to make sure that their pressure gauges are perfectly working and there are no issues with the because this can lead to osha violation. online training courses are designed to such workers to help them learn the technicalities of the job.