PGC, Inc. Appendix B; SmartPad version 0.503 Steady State & Programmable
November 2005 B-3
SmartPad™ USER INTERFACE
The SmartPad™ was initially shipped with an access code of 0000. If the code has been
changed and lost, please contact PGC for assistance.
The SmartPad™ may be configured in a steady state or 60 segment programmable controller set
point entry mode as desired.
The SmartPad™ software is capable of operating in several control modes, two temperature,
cascade, dryer and slow damper mode. This software will also behave differently based on the
temperature range (low temperature or standard range) Some modes are not applicable for every
system.
In two-temperature mode the air and water set points are entered directly by the user. The
desired Rh must be determined either by measuring the conditions in the chamber, or by using a
standard air/Rh/water spray graph.
In the cascade and slow damper modes the user enters the air temperature and Rh set points. The
water set point is automatically determined by the control unit module. Slow damper mode is
similar to cascade mode except that it will provide slow damper outputs for the air control loop.
Dryer mode is applicable only for units equipped with a desiccant dryer. In this mode, the air
temperature and Rh are entered by the user. The Rh is controlled using a desiccant dryer. The
dryer controller can be configured for bypass or reactivation heater capacity control. The type of
dryer control is pre-configured at the factory. The displayed screens will be different based on
the type of control selected.
SmartPad™ software is capable of operating with both analog and digital temperature and Rh
sensors. Certain features will be disabled or enabled, depending on which type of sensor is
applied. For example, if digital sensors are applied, the water RTD calibration is accessible from
the SmartPad™. With analog sensors, this feature is disabled.
The on/off function of the system is also configured to match the hardware applied. If the
system is equipped with an on/off switch, the on/off function in the SmartPad™ is disabled.
When the on/off function in the SmartPad™ is enabled, a standby key will be present in the
lower, right corner of the keypad. When the SmartPad™ is powered up for the first time, in this
configuration, a screen will appear that indicates how to energize the rest of the system. Pressing
the on/off key will enable or disable the system, each time it is pressed.
The SmartPad™ is capable of communication with a remote terminal via RS-232 protocol. A
DB-9 connector is provided for ease in connection. Refer to the serial communications section
of this manual for more information.
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