22 Installation
Note: if all three LEDs are flashing red and they always turn on and off together, like the diagram
for
below, then the meter is experiencing an error or low line voltage, not nega-
tive power.
Erratic Flashing
If the LEDs are flashing slowly and erratically, sometimes
green, sometimes red, this generally indicates one of the
following:
●
Earth ground is not connected to the meter (the top
connection on the green screw terminal).
●
Voltage is connected for a phase, but the current transformer is not connected, or the CT has
a loose connection.
●
In some cases, particularly for a circuit with no load, this may be due to electrical noise. This
is not harmful and can generally be disregarded, provided that you are not seeing substantial
measured power when there shouldn’t be any. Try turning on the load to see if the erratic
flashing stops.
To fix this, try the following:
●
Make sure earth ground is connected.
●
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).
●
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).
●
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). If you see this
happen repeatedly, return the meter for service.
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.
Grn
Red
Grn
Green
Red
Grn
Red
C
B
A
Off
Off
Off
Off
Off
Red
Off
Red
Off
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
