Trending enables the user to view both current and historical information on the process variable and setpoint of each control loop.
The 2704VC user interface offers he user an extremely easy method of editing, selecting and running the programs and all programs can be given a meaningful name.
The 2704VC can interface directly to active vacuum gauges that output signals in the range of 0-10Vdc. Special linearization tables have been created for many industry standard gauges and additional linearizations can be created upon request.
Two inputs are used for the high and low main chamber vacuums and a third input is available for inputs such as backing, foreline or backfill. The total number of vacuum inputs can be as much as five.
Switchover between chamber gauges is automatic and bumpless. To prevent damage to the high vacuum gauge, power is no applied until a preset vacuum level has been achieved. Six vacuum setpoint outputs are available, each of which can operate on any gauge.
When the roughing pump starts, a diagnostic timer is started that generates an output if the backing vacuum does not achieve a preset vacuum level within a specified time. A leak detection routine can also be implemented.