3. OPERATION
Page 69
© 2009 DH Instruments, a Fluke Company
OPERATION
To access the QDUT AutoTest data file viewing function press
[SETUP]
,
<5ATest>
.
The first display is the data file header which can be used to toggle through data files:
1.
Full scale of the QDUT AutoTest sequence with pressure unit
of measure and measurement mode.
2.
Number of test points completed / total number of test points
in the sequence definition.
3. Date
(YYYYMMDD)
and time the last point was completed.
6000.0 psi g 11/11
20021105 10:15 am
Use the forward and backward cursor control keys to scroll through the headers of the other
QDUT AutoTest data files available. PPCH stores up to ten data files in order of execution
with a new data file pushing all the files back and deleting the oldest one. When the header
of the data file you would like to view appears, press
[ENT]
or the down cursor control key to
view the first point of the identified sequence.
The display is:
1.
PPCH pressure logged for the test point.
2. Head, AutoZ and active Q-RPT indicator (same as in the
PPCH MAIN RUN screen).
3.
Indication that this point was out of tolerance. Indicates
<IN>
if point was in tolerance. Definition of out of tolerance is
(Nominal point – PPC pressure > DUT tolerance * DUT FS).
4. Number of this test point / total number of points in the
sequence.
6000.5 psi g hzX1H
View data OUT 2/11
Press
[ENT]
to move to the next data point or use the up and down cursor control keys to
scroll backwards and forwards through the test points. The data file header is between the
first point and the last point.
Press
[ESC]
to exit the data file. Confirmation is required to exit the data view function.
3.4.6
<6CONTROL>
PURPOSE
To set the automated pressure control mode for the active range, customize control
parameters for the active control mode, activate default control parameters.
PRINCIPLE
The CONTROL function allows the active control mode for the current range to be set to
dynamic (standard or hi volume), static, monotonic or ramp. The control mode set is specific
to the active range and is saved with that range when ranges are changed. For a complete
description of the operation and purpose of the different control modes see Section 3.2.2.
When a control mode is selected using the CONTROL function, CONTROL parameters are
automatically set to default values for that control mode in the active range (see Table 10 for
definition of PPCH default control parameters). The default control parameters are those
best suited to operate within PPCH pressure control and measurement specifications for a
given range of operation.
Control mode parameters can be viewed and customized in the CONTROL function
(see Section 3.4.6.). Customizing the control parameters changes the conditions required for
a
Ready
condition to occur (see Section 3.2.3). This can be used to increase control speed
(reduce time to
Ready
), usually by decreasing control precision, or to increase precision which
usually decreases control speed. For example, changing the dynamic pressure control hold
limit from its default value of ± 0.01 % of the active range to ± 0.05 % of the active range
decreases the time required to set a pressure since the limit within which the pressure must
