Edwards, nEXT Turbomolecular Pumps, nEXT240, nEXT300 and ...

B800-00-880 Issue B
Operation
4.1.6 Timer setting and options
Refer to Section 1.4.3 for a full description of Timer functionality.
The timeout period is a user-configurable option and can be set to any value from 1 to 30 minutes. When you receive
the pump, it will be configured with a default timeout period of 8 minutes.
To change the Timer setting, send the following command (where the characters 'd' represent the timeout period in
minutes):
The reply you receive will be as follows:
Command ! S 8 5 4 sp d d cr
Reply * S 8 5 4 sp r cr
The Timer setting is now stored in memory within the nEXT pump.
To check what timeout period is set, you can send a query as follows:
The reply you receive will be as follows:
Command ? S 8 5 4 cr
Reply = S 8 5 4 sp d d cr
The Timer is permanently enabled during ramp-up, however it is optional whether you have it enabled at other times.
When you receive the pump, it will have the Timer enabled by default.
If you wish to disable the Timer, send the following serial command:
The reply you receive will be as follows:
Command ! S 8 7 0 sp 0 cr
Reply * S 8 7 0 sp r cr
The state of the Timer option is stored in memory within the nEXT pump.
To enable the Timer again, send the following serial command:
The reply you receive will be as follows:
Command ! S 8 7 0 sp 1 cr
Reply * S 8 7 0 sp r cr
To check whether the Timer is enabled or disabled, send the following query:
Command ? S 8 7 0 cr
The reply you receive will be as follows (where d=0 means disabled and d=1 means enabled):
Reply = S 8 7 0 sp d cr
Page 48
© Edwards Limited 2009. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.