E-Mon E-PS-E-RTU-N - Manual (Page 42)

Chapter 3 Using Front Display Display Operations
42 PowerSmart+ Power Quality Meter
If the Auto-Scroll feature is enabled, the display immediately enters the
auto scroll sequence.
Auto-Scroll
If the Auto-Scroll feature is enabled, the data display automatically scrolls
through all pages of all data displays that are included into the
programmable auto-scroll sequence. The scroll interval is adjustable in the
range of 2 to 30 seconds. The scroll sequence may include all or only
selected displays.
The display automatically enters auto scrolling if no button is pressed for
the Auto-Return interval when the Auto-Return feature is enabled or in 1
minute if this feature is disabled. In the last case, the scroll sequence is
restored from the point where it was interrupted.
To stop auto scrolling, press briefly any button if the backlight is on; else
press briefly any button twice since the first press only sets the backlight
on and does not affect auto scrolling.
Auto-Scroll is not operational in TEST mode.
Measurement Units
The PowerSmart+ PQM has a selectable resolution for volts, amps and
powers presented on the front display and via communications. See
Device Options in Chapter 5 for information on selecting the data
resolution in the PowerSmart+ PQM .
Low Resolution Option
Currents are displayed in whole amperes below 10,000 A, and in kilo
amperes above 10,000 A.
Measurement units for voltage and power depend on the voltage
connection scheme:
• For direct wiring (PT=1) or wiring via PT with the PT ratio up to
and including 4.0, voltages are displayed in volts, and power in
kilowatts.
• For the PT ratio above 4.0, voltages are displayed in kilovolts with
three decimal places, and power in megawatts with three decimal
places.
High Resolution Option
Currents are displayed in amperes with up to two decimal places below
10,000 A, and in kilo amperes above 10,000 A.
Measurement units for voltage and power depend on the voltage
connection scheme:
• When direct wiring is used (PT=1), voltages are displayed in volts
with one decimal place, and power in kilowatts with three decimal
places.
• When wiring via PT is used with the PT ratio up to and including
4.0, voltages are displayed in volts, and power in whole kilowatts.
• For the PT ratio above 4.0, voltages are displayed in kilovolts with
three decimal places, and power in megawatts with three decimal
places.
The small round “Kilo” and “Mega” LEDs light up showing the appropriate
measurement units for a displayed page.