5. GFS TOOLS SOFTWARE
Page 81
© 2007 DH Instruments, a Fluke Company
Figure 52.
Options, [Run Test] Tab
Table 26.
Options,
[Run Test]
Tab Fields
FEATURE
DESCRIPTION
Zero Balance/
AutoZero Setup
(option box)
There are 3 automatic zero choices. The selections effect how the GFS is set to zero before
an accumulation begins. The choices effect manual tests only, where a Test Definition
contains a unique set of AutoZero choices. GFS and DUT samples are not taken until all pre-
accumulation options are complete. Any option selected will occur in addition to an initial
balance zero that GFS Tools performs to establish the amount of gas mass available for tests.
If Zero balance is selected, but the accumulation will begin within 5 minutes of this zero, GFS
Tools will NOT zero the balance again.
•
Do not use any pre accumulation options
- There are no specific zero operations
perfomed when an accumulation begins.
•
AutoZero at start of accumulation
- The GFS AutoZero function is run before the
accumulation begins.
•
Zero balance at start of accumulation
- The balance is set to zero before the
accumulation begins.
AutoZero at end of
of accumulation
(check box)
After the required accumulation mass is consumed, a final AutoZero is performed when this
option is selected. The accumulation is forced to continue until at least one more sample from
the GFS is taken.
It is not recommended to use this option for long accumulations that may require a large
correction. The resultant shift in data makes error plots created during the accumulation less
useful. It is also makes it more difficult to troubleshoot problems.
AutoZero at timed
interval
(check box)
Select this option to run the AutoZero at a timed interval. In typical laboratory environments,
an AutoZero should run approximately every 300 seconds (5 minutes). This minimizes the
absolute drift correction and provides a more continuous accumulation error plot. In very
stable environments this interval can be extended.