71M6534 datasheet(78/132 Pages) MAXIM | Exceeds IEC 62053/ANSI C12.20 Standards

Part No.	71M6534

Description	Exceeds IEC 62053/ANSI C12.20 Standards

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Manufacturer	MAXIM [Maxim Integrated Products]

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71M6533/G/H and 71M6534/H Data Sheet

FDS_6533_6534_004

78

Rev 2

4.14 Meter Calibration

Once the Teridian 71M6533 and 71M6534 energy meter device has been installed in a meter system, it

must be calibrated. A complete calibration includes the following:

•

Calibration of the metrology section, i.e. calibration for tolerances of the current sensors, voltage dividers

and signal conditioning components as well as of the internal reference voltage (VREF).

•

Establishment of the reference temperature (Section 3.2) for temperature measurement and temperature

compensation (Section 3.5).

•

Calibration of the battery voltage measurement (Section 1.5.9).

•

Calibration of the oscillator frequency (Section 1.5.3) and temperature compensation for the RTC

(Section 4.1.3).

The metrology section can be calibrated using the gain and phase adjustment factors accessible to the

CE. The gain adjustment is used to compensate for tolerances of components used for signal conditioning,

especially the resistive components. Phase adjustment is provided to compensate for phase shifts

introduced by the current sensors or by the effects of reactive power supplies.

Due to the flexibility of the MPU firmware, any calibration method, such as calibration based on energy, or

current and voltage can be implemented. It is also possible to implement segment-wise calibration (depending

on current range).

The 71M6533 and 71M6534 supports common industry standard calibration techniques, such as single-

point (energy-only), multi-point (energy, Vrms, Irms), and auto-calibration.

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