Allen-Bradley 1404-M4, User Manual

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Publication 1404-UM001D-EN-E - October 2004
Powermonitor 3000 Operations 3-3
Metering Accuracy Class
Table A.16, element 26 is a read-only parameter that indicates the
revenue metering accuracy class of the Master Module. If this element
contains the value 0, the Master Module meets ANSI C12.16 and
EN61036 Class 1 requirements for accuracy. If this element contains
the value 1, the Master Module meets ANSI C12.20 Class 0.5, EN60687
Class 0.5, and Canadian standard CAN3-C17-M84 requirements for
accuracy. If this element contains the value 2, the Master Module
meets ANSI C12.20 Class 0.2, EN60687 Class 0.2, and Canadian
standard CAN3-C17-M84 requirements for accuracy. The revenue
metering accuracy class is also indicated on the side of the Master
Module and can be accessed via the Display Module
(
DISPLAY
>
STATUS
>
ACCURACY CLASS
).
Expressing Metered Data on the Display Module
The Display Module displays scaled metered data in its basic units,
such as volts, amps, watts, etc. Prefixes such as “K” or “M” are used to
denote multipliers of 1,000 (kilo-) and 1,000,000 (mega-). The DM
expresses Power factor as a percentage, with a positive value
indicating leading and a negative value indicating lagging.
The Display Module displays values to a maximum precision of five
significant digits.
Viewing Metered Data Using the Display Module
The Display Module makes it easy to view the metering data
produced by the Powermonitor 3000. Refer to Display Module
Functionality later in this chapter for information on use of the Display
Module.
Table 3.2 Metering Accuracy Class
Model Class 1 Class 0.5 Class 0.2
M4 Standard Not Available Not Available
M5 Standard Optional
M6 Standard Optional
M8 Standard Optional
Allen-Bradley HMIs