SECTION 6 WSPC USER INTERFACE MANUAL
51
6.8 ADJUSTMENTS TAB
As discussed earlier in this manual, the adjustment
tab allows the user to modify certain control
parameters of the compressor operation. In addition
to the general control parameters previously
described, two VSD adjustments become available
when the WSPC is connected to a VSD compressor.
These VSD control parameters are setpoint pressure
and cost per kilowatt-hour. See Figure 6-6.
To view the VSD control parameters, click the
Adjustments tab to present the Adjustments display.
The additional VSD parameters are located in the left
column of the display.
The VSD control parameters are defined as follows
(ref. Figure 6-6):
VSD Setpoint pressure—The targeted pressure for
the variable speed controls. This is normally adjusted
near the bottom of the load/unload band. The speed
will be adjusted to maintain this pressure. Most
packages will allow adjustment of this over a wide
range to allow tailoring of the pressure to the needs
of the application. Adjustments will be automatically
made to the maximum speed to operate the motor at
its full capacity at any pressure.
Cost per KWH—The cost per kilowatt-hour of
energy is entered here. This setting is used in the
cost estimates displayed in the VSD Performance
box of the Compressor Data display. Value is set in
dollars or other units of currency. For example, an
entry of 0.070 equals 7 cents per KWH.
Adjustment of the VSD control parameters is
accomplished in the same manner as the
adjustments of the general parameters described in
Section 4.8 of this manual.
Figure 6-5: Service Tab—VSD Status
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