Section PSC 113.0902 - Testing equipment(1) Each utility shall maintain sufficient laboratories, meter testing shops, secondary standards, instruments and facilities to determine the accuracy of all types of meters and measuring devices used by the utility. A utility may, however, with the approval of the commission, have all or part of the required tests made or its portable testing equipment checked by the original equipment manufacturers, another utility, or testing agency having adequate and sufficient testing equipment to comply with these rules.(2) Each utility shall have the following minimum testing equipment available: (a) One or more portable standard watthour meters of capacity and voltage range adequate to test all watthour meters used by the utility.(b) Portable indicating instruments of such various types as are required to determine the accuracy of all instruments used by the utility.(c) One or more secondary standards to check each of the various types of portable standard watthour meters used for testing watthour meters. Each secondary standard shall consist of either an approved portable standard watthour meter kept permanently at one point and not used for field work, or not less than three approved watthour meters connected with current coils in series and voltage coils in parallel and kept running by connecting a 10-watt load. These meters must be well compensated for both classes of temperature errors, practically free from errors due to ordinary voltage variations and free from erratic registration due to any cause.(d) Suitable standards which are not used for field work to check portable instruments used in testing.(3) Any utility having more than 10,000 customers, or any other utility upon approval of the commission, may provide and use primary standards consisting of precision instruments, timing devices, potentiometers, standard cells, etc.Wis. Admin. Code Public Service Commission PSC 113.0902
CR Register, July, 2000, No. 535, eff. 8-1-00.