Eaton IQ 200, Installation, Operation And Maintenance Manual

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4.3 CONTRAST
The contrast of the screen can be adjusted without entering the
Contrast Adjust
menu by holding in the Enter button while pressing the S croll up arrow button (to
decrease contrast) or the Scroll down arrow button (to increase contrast).
4.4 DISPLAYED SIGN CONVENTIONS
The IQ 200 not only displays system values, but also indicates whether factors are
lagging or leading by displaying the following symbols:
Display Indication
Lg lagging (inductive)
Ld leading (capacitive)
L
g
lagging net var hours
L
d
leading net var hours
The IQ 200 is shipped with lagging vars and power factor represented by negative
values at the load, conforming to the
mathematical sign convention . To change to
the power engineer convention , which assumes positive values at the load, the
IQ 200 must be connected to an IMPACC™ network and programmed accordingly.
Note that the choice of
mathematical or power engineer convention has no effect on
the unsigned leading and lagging energy displays, but will reverse the sign of net
energy displays.
The following relationships apply:
Convention Load var Values Power Factor Values
Mathematic inductive negative negative (lagging PF)
Mathematic capacitive positive positive (leading PF)
Power Engineer inductive positive positive (lagging PF)
Power Engineer capacitive negative negative (leading PF)