DH Instruments COMPASS FOR MOLBOX, Руководство пользователя

Страница: 99 / 226

COMPASS

for molbox™ User’s Manual
Page 85
© 1998-2003 DH Instruments, Inc .
Point Type
Indication
(label)
Indicates how the flow point values in the <Points> table will be interpreted when the test
is run. The choices are: <%DUTFS> , <Flow Units> , <Output Units> or <Set Units> . If
the indication is <%DUTFS> , when the test is run, the flow points will be calculated from
the DUT input span defined in DUT Definition [Range] tab (see Section 9.5.4). Specifying
points in <%DUTFS> is useful in setting up a common test procedure that runs the same
point distribution for DUTs with different ranges. All other unit types are run directly as
values in the unit specified in the corresponding DUT Definition tab. To change the point
type, use the Test Definition
[Points] tab (see Section 9.5.3).
Insert
(action button)
Clicking <Insert> causes a pop-up window to display with three separate insert options:
•
Tare Point changes the cursor into a tare icon that can be dropped onto the desired
point to for a tare of the reference molbox to occur at that point. The tare icon will
remain next to the point unless removed by clicking it. Use the Test Definition
[Tare]
tab to specify tare execution details (see Section 9.5.4). If the Test Definition
[Sequence] tab (see Section 9.5.4) specifies a fixed taring sequence, this selection
is disabled.
•
Change molbloc changes the cursor into a molbloc icon that can be dropped onto
the point at which a molbloc change should occur. Realize the molbloc change
occurs BEFORE the point is executed. This feature may be used when a molbloc
change during the test is needed to maintain desired reference measurement
uncertainty. Click the molbloc icon to remove the molbloc change from the list.
•
Insert Point changes the cursor into a pencil icon that can be dropped on any point
to insert a blank point at that location. The selected point (and all subsequent points)
then shift down, leaving a blank point available for entry. Double click any test point
to remove it from the list.
•
Valve Driver Change displays the <Toggle molbox Drivers> form to allow the state
of the external molbox valve drivers to be changed. A depressed button indicates
the valve will be activated. Activate and deactivate the desired valves and press
<OK> . The cursor will change into the valve driver icon. Place it onto any point.
Realize that the valve driver change occurs before the flow is set for the selected
point but after any
<Change molbloc> . To view the valve driver state of an existing
<Valve Driver Change> , move the cursor over the icon and the existing state will
display in a tool tip message.
•
Timed Delay displays an input box to allow entry of a delay time. After the delay
time is entered, the cursor will change into a stopwatch that can be dropped onto any
test point. The entered delay will occur at the beginning of the selected point prior to
setting the flow but after any
<Valve Driver Change> .
Test Point Table
(numeric entry
fields)
The test point table lists the test flow points that will be run in sequential order when the
Test Definition is executed. The values entered are assumed to be in the unit specified by
the
<Point Type Indication> at the top of the table. If the test points exceed the 22 points
that are normally displayed, the scroll bar at the bottom of the table can be used to scroll
to additional columns of test points. Up to 100 test points can be included. The test point
table can be filled in by placing the cursor in the test point field and editing the desired test
point value. It can also be filled in automatically using the
[Points] tab (see Section 9.5.3).
The test point table can be cleared using <Clear> on the [Points] tab.