FPG8601™/VLPC™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company
Page 56
6.3.7
RUN DIAGNOSTICS
When FPG Tools
is in run mode, all information on this display is continually updated.
The goal of this run screen is to provide a compact view of all discrete outputs used in
calculating the FPG pressure as well as the main calculation components. Table 10 lists
specific information on the
<Diagnostics Display>
screen labels.
Pressure is ready when there are no out of range errors in the system status and the
FPG pressure is within the stability setting or hold limit, based on whether or not VLPC is
actively controlling.
Double click the <Rate> and/or <FPG Pressure> fields to display a strip chart of the
corresponding indicator.
Figure 24. <Diagnostics Display>
Table 10
.
<Diagnostics Display>
Options
LABEL
DESCRIPTION
FPG Prs
The calculated FPG pressure in the currently selected display units. When FPG
Tools
is in a run mode, this field is updated every time a relevant calculation value is
updated. Use the
[Units]
menu to change the display units and/or measurement
mode. After the pressure and unit are a sequence of text tags to indicate the
current operational state these tags are listed below:
a
– The FPG is in absolute measurement mode.
ad
– The FPG is in absolute differential measurement mode.
g
– The FPG is in gauge measurement mode.
t
– A thermal transpiration correction is being applied to the FPG pressure.
h
– A head correction is being applied to the FPG pressure.
Rate
The instantaneous FPG pressure rate of change per second in the last selected
pressure units.
Ready Indicator
Red/Green circular
indicator
A green light will display in this field when the FPG is Ready. This means that no
status or limit related errors are present and that the rate of change of FPG pressure
is within the stability criterion when the VLPC is not actively controlling the FPG
pressure. If the VLPC is controlling, the stability criterion is ignored, the hold limit is
used as the final criterion for ready (see Section 3.6). If any ready criterion is not
met, the indicator will be red which means the FPG is not ready.
DUT Pressure
The calculated DUT pressure based on the DUT pressure to output range setup
(see Section 6.6.2.3). If the DUT is not enabled, dashes appear in this field.
DUT Output
The direct output of the DUT formatted based on the
<Leading characters to
strip>
and the
<Output resolution>
specified in the DUT Setup.
