ATM90E32AS-AU-R datasheet(74/84 Pages) ATMEL

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M90E32AS [Datasheet]

Atmel-46003B-SE-M90E32AS-Datasheet_02122015

6.2

METERING/ MEASUREMENT ACCURACY

6.2.1

METERING ACCURACY

Metering accuracy or energy accuracy is calculated with relative error:

Where Emea is the energy measured by the meter, Ereal is the actual energy measured by a high accurate normative meter.

Table-16 Metering Accuracy for Different Energy within the Dynamic Range

Energy Type

Energy Pulse

ADC Range

When Gain=1

Metering Accuracy

note

Active energy

(Per phase and all-phase-sum)

CF1

PF=1.0 120

μV-720mV

0.1%

PF=0.5L, 180

μV-720mV

PF=0.8C, 150

μV-720mV

Reactive energy

(Per phase and all-phase-sum)

CF2

sinФ=1.0 120

μV-720mV

0.2%

sinФ=0.5L, 180

μV-720mV

sinФ=0.8C, 150

μV-720mV

Apparent energy

(Per phase and arithmetic all-phase-

sum)

CF2

600

μV-720mV

note 2

0.2%

Fundamental active energy

(Per phase and all-phase-sum)

CF3

PF=1.0 120

μV-720mV

0.2%

PF=0.5L, 180

μV-720mV

PF=0.8C, 150

μV-720mV

Harmonic active energy

(Per phase and all-phase-sum)

CF4

PF=1.0 120

μV-720mV

0.5%

PF=0.5L, 180

μV-720mV

PF=0.8C, 150

μV-720mV

Note 1: All the parameters in this table is tested on Atmel test platform.

Note 2: Apparent energy is tested using active energy with unity power factor since there’s no standard for apparent energy. Signal

below 600

μV is not tested.

100

−

real

mea

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