Basic Error: Must meet Class 2.0 requirements.
Acceptance Error Limits: Under specified reference conditions, the device must satisfy the requirements of the technical specifications; our bureau will conduct acceptance testing based on an error limit equal to 50% of the limit prescribed in the verification regulations.
In-Service Error Limits: Under specified reference conditions, the device must satisfy the requirements of the technical specifications.
Error Variation Limits Due to Influence Quantities: The additional percentage error variation caused by changes in influence quantities-relative to the reference conditions specified in the regulations-shall not exceed the limits prescribed therein.
Influence of Ambient Temperature: The average temperature coefficient shall not exceed the limits prescribed in the regulations.
Time-of-Use (TOU) Function: Supports a three-tariff structure; capable of displaying the cumulative energy consumption for specific time periods (TOU energy) as well as the total energy consumption; daily timekeeping error shall be less than 0.5 seconds per day.
Meter Reading: Supports infrared programming and meter reading; communication protocols shall comply with the DL/T 645-1997 standard.
Output Ports: Features standard pulse outputs and LED outputs corresponding to the measured energy values, provided for testing purposes.
Meter Error Guarantee Period: Under normal operating conditions, the average service life of the energy meter shall be at least 10 years.
Battery: Utilizes a cylindrical battery with a service life of at least 10 years.