An audit is required for many reasons.
- When there is a balance error where the contribution of error could be directly related to metering
- When an IWA/AWWA water balance/audit is being done where a level of confidence in the calibration techniques needs to be defined
- When a current calibration program is not adequate enough to prove performance
- When a more detailed approach to understanding the metering process is required identifying all aspects of metering type, installation, flow throughput, calibration, outputs, registration, etc