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Water Flow Calibrations
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THIS
SERVICE IS TEMPORARILY UNAVAILABLE DUE TO RENOVATIONS BEING MADE
ON THE
FACILITY.
NIST provides calibration services for water flow meters using a water flow facility. The water flow facility consists of a reservoir, pumps, meter runs, and weigh tanks. The system operates as a constant flow facility and uses timed collections of water to compute the average flow through the meter being calibrated. The relative expanded uncertainty for these facilities is 0.12%. Flows up to 38,000 L/min (10,000 gal/min) can be provided in pipes up to 40.6 cm (16 in) in diameter. Pipe connections should be ASA 150 lb steel flanges, VictaulicTM couplings, or adapters thereto.
Meters can be tested if the flow range
and piping connections are suitable, and if the system to be tested has
precision appropriate for calibration with the NIST flow measurement
uncertainty. We charge $4521 per flow meter for our
normal
calibration. We deliver a calibration report which includes an uncertainty
for the flow meter calibration factor. The uncertainty of these
flow
meter calibration coefficients will also depend on the reproducibility
of the
meter under test and the uncertainty for the flow meter calibration
factor. The uncertainty of these flow meter calibration
coefficients will
also depend on the reproducibility of the meter under test and the
uncertainty
of any instrumentation associated with measuring the flow meter
output.
To read more about the principles of operation and uncertainties of our
Water
flow standard and see sample calibration reports see our Technical
Notes and Publications.
A normal flow calibration includes five different flows, with five averages of the meter readings and the standard flow measurement made at each set point, with this entire test sequence repeated on a second day to assess reproducibility. It is helpful if the customer specifies the flow set points and the instrumentation requirements of the meter (pressure, temperature, full scales required, etc.).
Turnaround time for a single flow meter is approximately 4 weeks:
- Allow 2 weeks for shipping;
- 1 week for set-up and review; and
- 1 week for report writing and review.
Please contact Iosif Shinder to schedule the calibration of your instrument(s).
To have your water flow meter(s) calibrated:
- Contact Iosif Shinder to schedule your calibration dates;
- Fax or mail a purchase order to Iosif Shinder following purchase order guidelines and choosing a Service ID Number which can be found in the NIST Calibration Program Calibration Services Users Guide SP 250 Appendix Fee Schedule (2006)
- Ship your flow meter(s) to Iosif Shinder following shipping procedures outlined in the NIST Calibration Program Calibration Services Users Guide SP 250 Appendix Fee Schedule (2006)
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Iosif Shinder |
John
D. Wright |
