Aclara SGM1400 Series, Руководство пользователя

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S G M 1 4 0 0 S e r i e s S m a r t M e t e r U s e r M a n u a l – S M E T S 2
81
Chapter 8 • Tests Procedures and Maintenance
CHAPTER
8
T
ESTS
P
ROCEDURES AND
M
AINTENANCE
SGM1400-B Series meters are equipped with a pulse output LED as well as test
indicators on the display.
Pulse Output LED
The SGM1400-B Series meters are equipped with an LED indicator for absolute
active energy.
In reactive energy mode, the LED will pulse for reactive (kVArh) energy (for all
four quadrants) and remain illuminated to indicate reactive energy anti-creep
mode. Anti-creep is defined as when no current is flowing through the meter or
when the current is less than the defined starting current of the meter.
The uniformity of the indicator is sufficient to allow verification of calibration. It
is possible through a suitable number of pulse values to check the accuracy of the
meter over the entire current range.
The indicator is configurable to provide support for both active and reactive
functionality by use of an appropriate command through any of the
communication ports.
The pulse rate is fixed at 1,000 pulses per kWh/kVArh.
The LED indicator reverts to active energy functionality when a cancel command
is received or after a configurable period has elapsed. Note that cycling power
alone will not cause the LED indicator to revert to active energy.
Calibration
The pulse output LED emits calibration pulses. The LED pulses at the rate
denoted on the meter cover and is directly proportional to the current active power
(W) or reactive power (var). The duration of each output pulse is approximately
25 milliseconds.
The default unit for the calibration pulses is active energy, or watt hours (Wh).
The meter may be switched to reactive energy or var-hour (varh) calibration
pulses via the optical port.
Test Display
The LCD has annunciators for quadrant and energy flow indication. The
annunciators provide valuable information during the testing process. Please refer
to the Display section on page 10 for more information.