This document discusses various methods for testing water meters to ensure their accuracy, including: 1) Single meter test benches which test meters individually and multi-meter test benches which can test multiple meters simultaneously. 2) Comparative standards for water meter testing including volumetric (test tanks, narrow-neck provers), gravimetric, master/reference meters, and displacement provers. 3) Automated test controllers are now commonly used to automate the testing process and calculate measurement errors. Proper testing ensures meters are functioning accurately and protects both customers and utilities.
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