DH Instruments COMPASS FOR MOLBOX, Руководство пользователя

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COMPASS

for molbox™ User’s Manual
Page 73
© 1998-2003 DH Instruments, Inc .
FEATURE DESCRIPTION
Set Range
Set Units
(conditional drop
down list/
text entry field)
Select the DUT set point unit from the drop down list. If the unit is not in the list, type the
unit into the list box. If the set range unit is the flow range unit, the min/max set point
fields are automatically set to the min/max flow range values. If the DUT’s
<Set Point
Type> in the DUT Definition [Set] tab is <Voltage/Current> , the set point unit must be V,
mV, A or mA.
There is no set range if the DUT is NOT a controller.
Set Range
Min Set
(conditional
numeric entry
field)
Enter the lowest set point (set point corresponding to the <Min Flow> ) of the DUT in the
set point unit. If the set point unit is the flow range unit, the <Min Flow> value is copied
here and cannot be changed.
There is no set range if the DUT is NOT a controller.
Set Range
Max Set
(conditional
numeric entry
field)
Enter the highest set point (set point corresponding to the <Max Flow> ) of the DUT in the
set point unit specified above. If the set point unit is the flow range unit, the <Max Flow>
value is copied here and cannot be changed.
There is no set range if the DUT is NOT a controller.
8.5.5 [TOLERANCE] TAB
The DUT Definition [Tolerance] tab is used to provide a specification for the DUT. The DUT
specification is used in calculating DUT errors and in determining the status of a test point
when tests are run (see Section 7.2), the state of the
<Tolerance Indicator> on the <DUT/Ref
Comparison> run screen (see Section 6.7.1) and is applied to test data plots to determine the
tolerance bars on plots (see Section 6.7.6). There are several tolerance formatting options.
Choose the selection appropriate for the DUT.
Table 19 provides details on each of the [Tolerance] tab fields.
%Rdg only tolerances should be avoided if test points at or near 0 will be taken.
The tolerance becomes infinitely small as the reference flow approaches zero. Instead, use a
combination tolerance such as <%DUTFS OR %Reading (Greater of)>.
Figure 42 . DUT Definition Editor, [Tolerance] Tab