Factory Calibration; Customer Calibration Adjustment; Data Retention - Landis+Gyr FOCUS KWH Technical Manual

7.1.2.

Factory Calibration

The meter is calibrated at the factory as part of the manufacturing process. Calibration constants are
stored in nonvolatile memory. These constants are not alterable once programmed except through
another calibration cycle at the factory. Sufficient security features are provided to prevent the user
from altering the calibration constants stored within the meter.
7.1.3.

Customer Calibration Adjustment

Focus kWh calibration is adjustable by the user. Individual element FL calibration biases up to 1.00%
in increments of 0.05% are provided by means of a calibration utility and the configuration port.
The factory FL series (and individual element, when applicable) calibration value cannot be altered by
user calibration adjustment. Any individual element FL user calibration bias is stored in separate
nonvolatile memory locations accessible through the configuration port. The user calibration biases are
scaled to represent percent registration biases from the factory calibration registration values.
It is believed that the Focus meter will not need recalibration during its life but allowance for
adjustments has been provided should the utility want to modify the registration at some point in time.

Data Retention

All billing data is stored in nonvolatile memory. Billing data is retained during loss of power to the
meter.
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