WattNode BACnet, Справочное руководство

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24 Installation
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If there are unused current transformer inputs, install a shorting jumper for each unused CT (a
short length of wire connected between the white and black dots marked on the label).
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If there are unused voltage inputs (on the green screw terminal), connect them to neutral (if
present) or earth ground (if neutral isn’t available).
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If you suspect noise may be the problem, try moving the meter away from the source of noise.
Also try to keep the CT wires as short as possible and cut off excess wire.
Meter Not Operating
It should not be possible for all three LEDs to stay off
when the meter is powered, because the phase powering
the meter will have line voltage present. Therefore, if all
LEDs are off, the meter is either not receiving sufficient
line voltage to operate, or is malfunctioning and needs to be returned for service. Verify that the
voltage on the Vac screw terminals is within ±20% of the nominal operating voltages printed in the
white rectangle on the front label.
Meter Error
If the meter experiences an internal error, it will light
all LEDs red for three seconds or longer. Check the
ErrorStatus Objects
to determine the exact error. If this
happens repeatedly, return the meter for service. If a
severe error occurs twice in 24 hours, the LEDs will stay
red for 24 hours.
Bad Calibration
This indicates that the meter has detected bad calibration
data and must be returned for service.
Line Voltage Too High
Whenever the meter detects line voltages over 125% of
normal for one or more phases, it will display a fast red/
green flashing for the affected phases. This is harmless if
it occurs due a momentary surge, but if the line voltage is
high continuously,
the power supply may fail. If you see
continuous over-voltage flashing, disconnect the meter immediately! Check that the model
and voltage rating is correct for the electrical service.
Bad Line Frequency
If the meter detects a power line frequency below 45 Hz
or above 70 Hz, it will light all the LEDs yellow for at least
three seconds. The LEDs will stay yellow until the line
frequency returns to normal. During this time, the meter
should continue to accurately measure power. This can
occur in the presence of extremely high noise, such as if the meter is too close to an unfiltered
variable frequency drive.
Off
Off
Off
C
B
A
3.0sec
Red
Red
Red
C
B
A
Yellow
Red
Red
C
B
A
1.0sec
G R G R G R G R G R G R
G R G R G R G R G R G R
G R G R G R G R G R G R
C
B
A
3.0sec
C
B
A
Yellow
Yellow
Yellow