User's Manual

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07 April 2006 A-1
REX Meter
Technical Manual A Glossary
A Glossary
billing data The measured quantities recorded and stored by the meter for use
in billing the consumer. May also be referred to as tariff data.
del see delivered.
delivered Used to specify the energy delivered (provided) to an electric service.
demand The average power computed over a specific time.
demand interval The time period over which demand is calculated. In the REX
meter, the demand interval must be 15, 30, or 60 minutes.
demand reset The act of resetting the present maximum demand to zero.
demand threshold The present value of demand that, when reached, sets a
warning flag.
display quantity Any value available for display on the LCD.
EEPROM Acronym for electrically erasable programmable read only memory.
This memory retains all information even when electric power is removed from
the circuit.
energy Power measured over time.
error code display The method by which the meter displays an error
message which consists of E and numeric codes. Error codes indicate that a
condition exists or has occurred that may be affecting billing data.
IC see integrated circuit.
integrated circuit Generally used to reference the meter circuit used in the
REX meter for per phase voltage and current sampling plus energy
measurements.
K
e
The smallest discrete amount of energy available within the meter. It is the
value of a single pulse used between the meter engine and the microcontroller.
K
h
A meter constant representing the watthours per output pulse on the optical
port or one flash of the LCD K
h
indicator. Historically, K
h
represents the energy
equivalent to one revolution of an electromechanical meter.
LCD see liquid crystal display.
LCD test A display showing 8 in all the display areas and all identifiers on the
LCD turned on. This confirms that all LCD segments are operating properly.
LP see load profiling.
line frequency The frequency of the AC voltage. Depending upon the country
or region, the line frequency is either 50 Hz or 60 Hz.
liquid crystal display The LCD displays metered quantities and other
information about the REX meter. Display quantities are factory programmable.
Technical
Manual
REX
Meter