Veeco MS40 Operation And Maintenance Manual page 15

1.5.1 Standard Operation
This is the normal operating mode for the MS-40. During operation, the User
need only use the right (uncovered) portion of the display panel (the User
Panel is illustrated in Figure 2-1). All functions to be accessed and display
information needed to leak test an object are found on this panel. The panel
displays bar graphs indicating test port pressure and leak rate values.
Additionally, the panel indicates the current leak range mode, an accept/reject
indicator that indicates if the leak being tested is above or below the test set
point, and whether the unit is in test or standby mode. The user panel also has
toggles for automatic or manual ranging (including greater/lesser
pushbuttons), audio volume pushbuttons, an auto- zero pushbutton, a sniff
mode indicator and START and VENT pushbuttons (START is used to
commence the testing cycle as well as to interrupt the testing cycle without the
chance of accidentally venting the system, while VENT is used to interrupt
testing and/or to vent the test port).
1.5.2 Service Mode
WARNING!
Service Mode is initiated by first opening the rear panel of the unit (loosen the
1/4-turn screw at the top of the panel, then gently lower the door), and then
pressing the black toggle button at the top right hand side of the circuit board
that is attached to the panel. Once the toggle has been pressed, the unit is
placed in Service Mode and the Service Mode indicator is illuminated.
Service Mode disables the automatic valve controls and allows the User to
manually control all of the valves within the vacuum system. The valves are
controlled by a cluster of labeled momentary switches located on the left of
the User Panel. The LED indicator on each switch is lit when the valve is
open. Included within the vacuum system are: the auto-calibrator valve,
external rough valve, fine (direct) valve, fore-line (reverse) valve, gross testing
Vacuum Instrument Corp.
valve, purge valve, roughing valve, sniffer valve and the vent valve.
2099 Ninth Avenue
Ronkonkoma, NY 11779
631.737.0900
1109-186-00 Rev. C
The Service Mode of the MS-40 is intended for use by
qualified Vacuum Instrument personnel or Users specifically
trained by Vacuum Instrument. Under no circumstances
should any individual be assigned access to this mode
without a complete knowledge of vacuum systems as well as
the MS-40 System. Use by an unqualified operator may
result in damage to the unit and/or personal injury.
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