Marathon Electric DVR 2000E - Page 54

S
ection
8
52
15. Click on the
‘Control Mode’
button to change to
‘AVR’
mode (rectangular box to the right of
‘FCR’
). The
generator should be operating at the desired voltage. Note the fi eld voltage in
‘Voltage (V)’
and fi eld
current in
‘Current (A)’
values for future reference.
16. The
‘Field Current (A)’
and
‘Field Voltage (V)’
values will be relatively stable, but
moving up and down in small steps. To adjust the gain, click the
‘Gain’
button in the top tool bar.
On the lower left of the screen under
‘AVR < = Loop Gain KG...’
increase this value from
‘1’
to
‘1.5’
(value on the left). Return to the
‘Metering’
screen and observe the
‘Field Current (A)’
value. If it is changing signifi cantly more than previously, then stop at this point. If the value is not
changing signifi cantly more than previously, then continue increasing the
‘AVR < =
Loop Gain KG...’
(value on left) in steps of
‘.5’
until the
‘Field Current (A)’
value in the
‘Metering’
screen is oscillating by a signifi cant amount. At this point, begin
reducing the
‘AVR < = Loop Gain KG...’
in
‘.1’
steps until the
‘Field Current (A)’
value in the
‘Metering’
screen returns to the same state of stability. Click the
‘EEPROM’
button in the upper tool bar
to save the new settings to permanent memory in the regulator.
17. Click
‘File’
in the top tool bar and identify a new fi le name for the new settings obtained. Click
‘Save’
and then
‘Yes’
to save the new settings for future reference.
18. Click
‘Communications’
in the top tool bar and choose
‘Close Comm Port’
.
19. Disconnect the computer from the regulator.
The generator is now ready for operation.
Equipmen
t Needed:
IBM compatible PC (Windows ‘95, ‘98, 2000 or XP), a 120 volt, two prong power cord with fl ag terminals crimped
on the ends and a RS-232 serial port cable with 9-pin DB-9 type female and male connectors.