Wis. Admin. Code § PSC 113.0904
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.
Note: Previously s. PSC 113.46 (2), with changes.
History: Cr. Register, July, 2000, No. 535, eff. 8-1-00.