Wisconsin Administrative Code
Public Service Commission
Chapter PSC 113 - Service Rules For Electrical Utilities
Subchapter IX - Electric Meter Testing Programs and Record Requirements
Section PSC 113.0904 - Watthour calibration

Each utility which normally checks its own working portable standard watthour meters or instruments against primary or secondary standards shall calibrate these standards or instruments before they are submitted to a commission-approved test facility annually and attach to them a record of such calibration.

Previously s. PSC 113.46(2), with changes.