Veeco MS40 Operation And Maintenance Manual page 26

Vacuum Instrument Corp. Vacuum Instrument Corp.
2099 Ninth Avenue 2099 Ninth Avenue
Ronkonkoma, NY 11779 Ronkonkoma, NY 11779
631.737.0900 631.737.0900
1109-186-00 Rev. C
D3/Vent Delay: The amount of time needed to hold the
VENT pushbutton before the venting cycle begins. The
factory default is 1.0 seconds; the parameter may be set
between 0.1 to 999.9 seconds.
D4/Vent Duration: The amount of time the vent valve
will stay open after the unit's Pirani gauge indicates
atmosphere has been reached. The factory default is 1.0
second; the parameter may be set between 0.1 to 999.9
seconds. If D4 is set to 999.9 seconds, the Vent valve
will remain open until next test cycle is started.
D5/Minimum Gross Testing Time: May be set from 1.0
to 999.9 seconds; the factory default is 1.0 second. Sets
the minimum amount of time that the MS-40 will remain
in the Gross test mode. Prevents unit from auto ranging
and crossing over into Reverse flow mode before a gross
leak is detected. Useful when testing large parts that may
have a long helium response time.
D6/Minimum Rough Time: May be set from 1.0 to 999.9
seconds; the factory default is 1.0 second. Specifies minimum
amount of time that MS-40 will remain in Roughing state before
crossing over into a testing state. Useful for testing parts with high
gas load which require extended pumping.
D7/Reverse Rough Close Delay: May be set from 0.1 to
999.9 seconds; the factory default is 0.1 second. If set to 999.9
seconds, external Rough valve will remain open for entire
duration of reverse flow testing. Keeps external Rough valve open
for specified amount of time after reverse flow valve has opened.
Only active on units equipped with external Rough valve option.
NOTE:
In Service mode, the delay function displays:
D1: the current software version stored in flash memory (e.g.,
FLASH 4.3).
D2: the current software version stored in ROM (e.g.,
EPROM 1.5).
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