PXL Series Installation
and Operation Manual
Instruction Manual
Page 14 Effective: January 2006
4.5 PXL Premium Display
Calibration Procedure
In some rare cases, the line voltages
displayed on the Premium display may be
incorrect as indicated in the image bellow.
The Auto Calibration feature is what we
actually use in calibrating the Premium
display in the plant. However, this
procedure can be done in the field by
pressing the STEP button before power is
applied to the unit. Then, the operator
selects the system voltage from 208Y to
600Y/D to be displayed.
It measures the input voltage and
assumes that this is equal to the nominal
voltage of the model. So for a 208V
model SPD if the actual input is 230 V,
the display will still be 208V. It measures
and averages a number of cycles then
gets a scaling factor that is used in
displaying 208V in this case.
If this procedure is going to be done in
the field, then calibration must be
performed when the input voltage is close
to nominal to get an accurate display. In
the factory, we set the voltage to 208V
manually through a variac transformer.
4.5.2 Premium Display
Calibration Procedure Steps
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Shut OFF power to the unit.
Press and hold the STEP button. Do
NOT release (arrow 2)
Apply power to the unit
The display will show:
- first row
- second row
Release the STEP button.
Press the STEP button once to scroll
through the following voltages:
Select Voltage
240V Spt..........240 V Split Phase
240V D/HG......240 V Delta & High Leg
480V Y/D.........480 V Wye/Delta
600V Y/D.........600 V Wye/Delta*
400V Y/D.........400 V Wye/Delta*
220V Y/D.........220 V Wye/Delta*
If the STEP button is pressed again,
selection returns to 208V Wye.
Press TEST (Arrow 7) button once to
accept selected system voltage. Then,
the display will go into Auto-Calibration
and display the system voltage.
Unit is ready to display voltage.
Note: If selection made is incorrect,
repeat all steps starting with STEP 2.
Set Voltage
208 Volts Y
*System Voltages not available for PXL SPD
100KA
VAB VBC VCA
208
208
208
7
2
Effective 01.06
IM 01005001E
information visit: www.eatonelectrical.com
4.5.1 What are the Reasons for
the Auto-Calibration Feature?
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To compensate for the differences in
the value of the scaling resistors, offset
voltage of the amplifiers in the display.
To allow for field adjustment if
necessary.
Use of one firmware/hardware for all
voltages. The Premium display board can
display any system voltage from 208 -
600V.
