13
The calibration LED produces pulses in response to energy whether it is delivered to the load or received from
the load.
Registration verification testing requires no more than 30 seconds at full load.
The calibration LED is visible in meter shop lighting and room temperature conditions.
7.1.1.
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.
7.1.2.
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 calibration FL series (and individual element, when applicable) calibration value can not be altered by
user calibration adjustment. Any individual element FL user calibration biases 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.
7.2. Data
Retention
All billing data is stored in nonvolatile memory. Billing data is retained during loss of power to the meter.
8. Pulse
Outputs
8.1.
Pulse Initiator Output
The Focus kWh offers one optional solid-state KYZ output. The solid-state pulse initiator output emits pulses in
accordance with +kWh, -kWh, and added kWh as configured by the user. The pulse output scaling factor is
programmable by the user and
follows the same convention as the AX Altimus Ke scale factor with the
exception that Ke values shall be selectable in increments of meter Kh/12
. All energy measured by the meter is
accounted for in the KYZ pulses emitted by the meter for all valid Ke values. The can modify the Ke scaling
factor in a meter shop.
The unterminated KYZ output cable passes through a hole in the 6 o’clock position in the meter base.
The pulse initiator output responds in accordance with energy delivered to the load. No pulses are emitted when
energy is received from the load.
The pulse initiator option is user installable in a meter shop environment.
8.2. Communications