7 Process Control Module
65
Series 330 Vacuum Gauge Controller
Instruction Manual - 330004 - Rev. 02
7.3.1.1 To Display a Setpoint
Refer to Figure 7-2 when displaying setpoints.
1.
Select the channel (#1 or #2) you want to display.
2.
Press the Up or the Down SET button and release. The programmed setpoint will appear for 2
seconds on the 330 VGC display.
7.3.1.2 To Modify a Setpoint
Refer to Figure 7-2 when modifying setpoints.
1.
Select the channel (#1 or #2) you want to modify.
2.
Press and hold the Up or Down SET button for the direction you want the setpoint to change;
up to raise the setpoint, or down to lower the setpoint.
3.
The setpoint will scroll until the button is released. It will scroll slowly until a decade
boundary is crossed and then will speed up to facilitate rapid changes across many decades.
Release the SET button when you have entered the desired decade, and then press it to scroll
slowly within the decade to reach the exact setpoint needed.
After the setpoint button is released, the display will return to pressure data after two seconds. At
this time the new setpoint will be stored in non-volatile memory.
7.3.2 Points to Consider in Using the Process Control Module
• If the ion gauge is OFF, the Process Control relay will deactivate, regardless of polarity setting.
• No change in the status of the relays will occur during degas. They will function as if the pressure
was frozen at the instant degas was initiated.
• There is a programmed 10% hysteresis on each process control setpoint. For example, with a
pressure setpoint of 6.3 Torr, the relay will activate when the display reaches 6.2 Torr (for falling
pressure) and will deactivate when the pressure rises to one significant digit above the setpoint
Figure 7-2
Process Control Module Front and Rear Panels
Summary of Contents for Series 330
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