Will Meter Data Be Lost When Powered Off?
The powered-off metering data collection is very important in power monitoring and energy management applications , Many customers have asked whether the measurement data of BLUEJAY meters will be lost after power failure? Which data can be permanently saved and which data will be lost after power failure? Let us explain it in detail:
The multi-function meters produced by BLUEJAY are divided into the following three categories of measurement data. (Take APM-96Q multifunction power meter as an example ) Different types of data are processed differently after a power failure:
1. Instantaneous metering data collection
Contents: current, voltage, frequency, THD, DI/DO status, etc.
Saving method: not saved after power failure.
These data are real-time sampling values. After the device is powered on, they are continuously refreshed in real time and lost after power failure.
Future function expansion:
BLUEJAY’s subsequent product planning will add a LOG recording function. These instantaneous data can be recorded and stored through SD cards, USB interfaces and supporting reading tools, etc., which are often used for voltage flicker analysis, harmonic recording and power quality monitoring. The general sampling interval supports 64, 256, 512 times, etc., to meet the needs of transient capture of voltage fluctuations.
2. Accumulated metering data collection (accumulated electric energy value)
Contents: active electric energy, reactive electric energy, apparent electric energy
Save method: Permanently save after power failure, unless manually or RS485 cleared
The accumulated electric energy data is stored in the EEPROM or FLASH memory inside the meter. Even if the device is powered off, the data is still retained to ensure accurate and reliable measurement. The data will only be cleared when the clear command is manually executed.
3. Metering data collection (event recording type)
Contents: TOU/multi-tariff (time-sharing metering): accumulate electricity consumption according to the set time period
SOE (event sequence recording): record switch quantity action, meter state change, alarm and other events
Waveform capture: record voltage and current transient waveforms
Save method: Permanently save after power failure, unless manually or RS485 cleared
Note: This type of data needs to be equipped with an RTC real-time clock chip and a built-in battery to ensure that the clock and recording functions continue to operate normally even in a power-off state, ensuring that event records have complete timestamps, which is suitable for accident tracing and operation log management.
If you have more functional questions or project selection requirements for BLUEJAY meter products, please contact our technical team for professional support.
