Hi everyone,
I need to verify the calibration of a Foxboro IDP-10. It's measuring low pressure header air at 7 psi and the range of the meter is 0-1200 CFM. The meter is using the square root extractor which is preventing me from checking the cal. I would like to check at 25% (375 cfm) 50% (750) 75% (1125) and 100% (1200). Is this linear check acceptable, I tried it with a Fluke calibrator and at the low end the numbers were way off but at 100% I was spot on (is this the sr rt at work?). I'm pretty sure the square root is doing what it's supposed to do but I don't completely understand how to run a verification/cal with the sq rt.
What's more the Fluke calibrator is measuring in PSI. It's my understanding that flow and pressure are proportional so I feel I'm on the right track using PSI to verify CFM.
What is the proper way to verify calibration on this instrument?
Thank you kindly.
I need to verify the calibration of a Foxboro IDP-10. It's measuring low pressure header air at 7 psi and the range of the meter is 0-1200 CFM. The meter is using the square root extractor which is preventing me from checking the cal. I would like to check at 25% (375 cfm) 50% (750) 75% (1125) and 100% (1200). Is this linear check acceptable, I tried it with a Fluke calibrator and at the low end the numbers were way off but at 100% I was spot on (is this the sr rt at work?). I'm pretty sure the square root is doing what it's supposed to do but I don't completely understand how to run a verification/cal with the sq rt.
What's more the Fluke calibrator is measuring in PSI. It's my understanding that flow and pressure are proportional so I feel I'm on the right track using PSI to verify CFM.
What is the proper way to verify calibration on this instrument?
Thank you kindly.