Tecnai on-line help manual -- Options - UT Southwestern

<strong>Tecnai</strong> on-line help Options 138Options Software version 210.4 AutoGun Control (Expert) – (Thermionic)The AutoGun Control Panel provides a number of systemsettings concerning the filament as well as access to theConditioning procedure.FilamentThe filament type can either be Tungsten or LaB 6 . The type of filament can only be chosen by theSupervisor.Filament limitThe filament limit is the value up to which the filament setting can be increased before it stopsautomatically. The value can be adjusted by Expert user and Supervisor.Condition statusIt is not always possible to start the conditioning procedure. The Condition status indicates whyconditioning is not possible (apart from another procedure currently running). If conditioning is possible,the condition status is not visible and the Condition button is enabled.ConditionPressing the Condition button starts or stops the Conditioning procedure. The color of the buttonindicates the status (yellow = active).Condition toThe value for condition to is the goal used by the conditioning procedure. For Experts the suggestedvalue is the maximum high tension plus 5% if an overvoltage is possible (200 and 300kV), otherwise it isthe maximum high tension.Condition delay stepThe condition delay step defines the number of seconds the conditioning procedure will before it takesanother step (subject to the vacuum pressure being low enough).Filament hour counterThe filament hour counter displays the date the filament was installed and the number of hours thefilament has been in operation.