TIDUEM8B March   2019  – February 2021

 

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1.2 Key System Specifications

Table 1-1 Key System Specifications
FEATURESDESCRIPTION
Number of phases1 (split-phase with two voltages measured), 1 (split-phase with one voltage measured), 2 phase
Electricity meter accuracy classClass 0.1
Current sensorCurrent transformer
Tested current range0.05–100 A
Tested voltage range15 V–240 V
ADS131M04 CLKIN frequency8,192,000 Hz
ADS131M04 Delta-sigma modulation clock frequency4,096,000 Hz (= CLKIN / 2)
SPI Clock8,192,000 Hz
Oversampling ratio (OSR)512
Digital filter output sample rate8,000 samples per second
Phase compensation implementationSoftware
Phase compensation resolution0.0088° at 50 Hz or 0.0105° at 60 Hz
Selected CPU clock frequency48 MHz
MCU External SVS voltage2.0–2.1 V
System nominal frequency50 or 60 Hz
Measured parameters
  • Active, reactive, apparent power and energy
  • Root mean square (RMS) current and voltage
  • Power factor
  • Line frequency
Update rate for measured parametersApproximately equal to 1 second
Communication options
  • LCD
  • PC GUI via 5 kVRMS isolated RS-232 or isolated RS-485
  • External radio, or radio module connected to the Comms header
    • 5-V rail, current limited to 1.6 A with manual reset after overcurrent thermal shutdown event
    • Measured power failure detection threshold (VIN Falling) for 5-V rail = 4.05 V
    • Measured release UVLO (VIN Rising) for 5-V rail = 4.28 V
    • Measured release overvoltage condition(VIN Falling) for 5-V rail = 5.62 V
    • Measured overvoltage cutoff threshold(VIN Rising) for 5-V rail = 5.81 V
    • Custom software must be written for communication)
Utilized LEDsTotal active energy and total reactive energy
Board power supplyOption 1: 3.3 V directly to DVCC rail; Option 2: 5V to J4 header