Section IV - Operating Procedures
PID Controller Settings -
The PID Controller Settings are accessed
by touching the ‘PID Cntl Settings’ button
at the compressor operation screen. PID
stands for Proportional/Integral/Derivative.
QGV compressors are designed to adjust
the speed of the compressor to maintain
a target pressure. The compressor
speed changes in response to changes
in measured pressure or target pressure.
Error is the difference between target
pressure and measured pressure. (i.e.:
Error = Target Pressure - Measured
Pressure)
Default PID settings:
Gain: 5.00
Ti :
.00
Td:
0.02
Changing the PID settings is not
recommended since such changes can
greatly affect the response to pressure
changes on the compressor. If changes
have been made and the default settings
need to be restored, touch ‘Restore
Defaults’.
Touch the ‘PID On/Off’ button to toggle
between on and off.
Touch ‘Return’ to return to the ‘
Compressor Operation’ screen, then
‘Return’ again to return to the ‘Menu
Selection’ screen.
Operation Limits -
Blow Down Timer determines how long the
compressor will continue to run when the
minimum speed has been reached.
Starting Timer determines how long
the compressor will sit at the minimum
speed before activating the PID loop and
increasing the delivery.
Over Pressure Hold Point is the pressure at
which the compressor will hold at minimum
speed and activate the Blow Down Timer.
This allows some over-pressure before
entering the shutdown sequences.
Quincy Compressor-QGV Series
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Summary of Contents for QGV Series
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