SP Scientific VIRTIS 2K - Vacuum Control; Purge; Bath; Heat (Optional)

Sentry 2.0 Controls
V
irTis BenchTop 2K, 4K and 6
K
12 Rev 007, 10/11
© SP Scientific 2011
Vacuum Control
The Vacuum Control field displays the current vacuum level control setpoint. To
change the setpoint, use the Up/Down (+/-) buttons and navigate to the Vacuum
Control field. Press and hold the MENU button. When prompted, use the Up/Down
(+/-) buttons to adjust the value. Press MENU to enter the new setpoint.
Purge
The purge function is not available for BenchTop units.
Bath
The bath function is not available for BenchTop units.
Heat (Optional)
The Heat function gives the ability to add controlled heat to product shelves for
enhanced drying. If installed, you can set the temperature of the manifold shelves up
to 50 °C.
Note: Optional features will only be displayed if the factory-installed options were purchased
with your unit.
User Options Menu
To access the User Options menu, highlight User Options from the Main Menu and
press the MENU button.
 User Options
Vacuum Control VLC
Temperature Units C
Vacuum Units Torr
Relay Test 
Vacuum Pump Maintenance 
Vacuum Control
The Vacuum Control field sets the method used for vacuum level control – None,
VLC, or Power Save. Setting Vacuum Control to None disables vacuum level control.
Setting Vacuum Control to VLC allows gas to bleed into the system through a control
valve to maintain the vacuum setpoint. Setting Vacuum Control to Power Save
isolates the system and maintains pressure by shutting off power to the vacuum pump
and VBS valve. As the system pressure rises, the vacuum pump is re-energized and
the system is pulled back down. To avoid rapid cycling of the vacuum pump, the
Power Save Deadband should be set to 20 or more.
Temperature Units
The Temperature Units field displays the current setting for indicating temperature
values. Temperature may be displayed in either Fahrenheit (°F) or Celsius (°C).