STEVAL-IPE009V1 is a mono-phase/multi-tariff energy meter based on the ST72321BR9 and STPM14. It is cost-effective and flexible, meeting Class 1 accuracy for IB = 5 A and Imax = 80 A according to IEC 61036:1996 + A1: 2000. The meter operates at a voltage range of 220 V ± 20%. It continuously detects and displays no-load conditions, reverse direction, fraud, and case tamper conditions. The number of tariffs (1 to 4) and the maximum demand type (day, one month, or three months) can be configured. The meter accumulates data for the whole meter life, including total kWh consumption, average MD (maximum demand), total number of tariffs, tariff time slots, consumption under different tariff rates, and power failure date/time. It also stores data for the last 12 months, including consumption under tamper mode for each month, first/last case/fraud tamper date/time, total tamper time, and power failure accumulating time for each month. Additionally, it provides data for absolute maximum demand (absolute MD, date/time) according to the type of MD requested. The meter features an SW LCD driver for a 24 x 4 segment LCD glass with contrast control, an RTC with SPI for real date/time, and an EEPROM with SPI for storing 256 Kb of data. It can detect case tampering even in power-down mode and has an external switch for viewing all data stored in the EEPROM sequentially, even when AC power is not available. Battery backup is available to detect tampering and view all parameters stored in the EEPROM during power outages.
The STEVAL-IPE009V1 is a demonstration board designed as a ready-to-use energy meter application. It serves as a medium-end solution for power metering, utilizing the ST72F321BR9T6 microcontroller, M41T94 RTC, M95256 EEPROM, and STPM14 energy meter ASSP device.
| Accuracy Class | Class 1 for Ip = 5 A and Imax = 80 A |
|---|---|
| Operating Voltage | 220 V +/- 20% |
| LCD Display | 24 x 4 segment |
| EEPROM Capacity | 256 Kb |
| Tariff Configuration | 1 to 4 |
The device operates within a voltage range of 220 V plus or minus 20%.
The meter meets Class 1 accuracy when the maximum current (Imax) is 80 A.
The number of tariffs is configurable from one to four.