Attachment A: End Use Meter Standards All metering is of a revenue class metering accuracy in accordance with the ANSI C12 standards on metering and any other requirements of the relevant UDC or Local Regulatory Authority that apply. Such requirements apply to meters, current transformers, potential transformers, and associated equipment. ANSI C12 metering standards include the following: ANSI C12.1 – American National Standard Code For Electricity Metering ANSI C12.6 – American National Standard For Marking And Arrangement Of Terminals For Devices Used In Metering ANSI C12.7 – American National Standard For Watt-hour Meter Sockets ANSI C12.8 – American National Standard For Test Blocks And Cabinets For installation Of Self-Contained A-Base Watt-hour Meters ANSI C12.9 – American National Standard For Test Switches For Meters ANSI C12.10 – American National Standard For Electromechanical Watt-hour Meters ANSI C12.11 – American National Standard For Instrument Transformers For Revenue Metering, 10 kV BIL Through 350 kV BIL ANSI C12.16 – American National Standard For Solid-State Electricity Meters ANSI C12.18 – American National Standard For Protocol Specification For ANSI Type 2 Optical Port ANSI C12.20 – American National Standard For Electricity Meters 0.2 and 0.5 Accuracy Class ANSI C57.13 – IEEE Standard Requirements for Instrument Transformers
ii. 30 days of continuous/cumulative outage; (c) During a power outage, critical program and billing data is written to non-volatile memory. When power is restored, data is returned to active memory and data collection resumed; (d) Following a outage, register “catch-up” time is a maximum of 30 seconds. During the “catch-up” time the meter still calculates consumption and demand quantities. Optional inputs and outputs also function during this time; (e) During power outages, time is maintained with a cumulative error of no more than 2 minutes per week (0.02%); (f) The meter records the date and time of any power outage; and (g) Meters may also record the duration of any power outage. B-1: 3.6 Meter Test Mode Function Meters have the following test mode functions: (a) The meter has the capability of a Test Mode function that suspends normal metering operation during testing so that additional consumption and demand from the tests are not added to the meter’s totals; (b) The Test Mode function is activated by a permanently mounted physical device that requires removal of the meter cover to access or by a meter programmer connected to the optical port; (c) Activation of the Test Mode causes all present critical billing data to be stored in memory and restored at the time of exit from the Test Mode; (d) Upon activation of the Test Mode, register displays accumulate beginning from zero; (e) Actuation of the billing period reset device during Test Mode resets the test mode registers; (f) a programmable time-out period, the meter automatically exits from Test Mode and returns to normal metering; and (g) The default Test Mode registers for an unprogrammed meter include as a minimum: i. Time remaining in the test interval; ii. Maximum kilowatt block demand; and iii. Total kilowatt-hours. B-1: 4 DISPLAY REQUIREMENTS