6. FPG TOOLS
Page 49
© 2007 DH Instruments, a Fluke Company
6.3.3
TARE DISPLAY
The
<Tare Display>
always holds the last system zero information. All values in this display
are used in the determination of FPG pressure. This data is stored even after FPG Tools is
closed and when run mode is turned off. Realize that the stored information is not
always valid. Several outside influences that are not detectable by the software can render
the tare information invalid. It is best for a user to always re-zero the system prior to taking a
new set of FPG data.
The FPG should be re-zeroed using FPG Tools any time the unit is turned off, handled by
an operator, prior to a comparison with another device, or after changing measurement
modes. Failure to follow this procedure may result in invalid pressure data.
Figure 18. <Tare Display>
Table 6. <Tare Display>
Labels
LABEL
DESCRIPTION
Tare Mode
This is the pressure measurement mode that was in effect when the system was last
zeroed. The field is useful when the operation of the FPG will include changes in
measurement mode.
N
The load cell output in counts just prior to setting the value to 0. After the FPG has been
successfully tared in the active measurement mode, this value indicates zero drift since
the last tare.
Lube Prs
The lubrication pressure in kPa at the time of tare.
ATM
The atmospheric pressure at the time of the last tare.
Post Temp
The mounting post temperature at the time of the last system zero.
Lube Temp
The lubrication volume temperature at the time of the last system zero. This value is used
for reference purposes only and is not applied to any calculations.
%RH
The lubricating volume humidity at the time of the last tare.
