DH Instruments COMPASS FOR MOLBOX, Руководство пользователя

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COMPASS

for molbox™ User’s Manual
© 1998-2003 DH Instruments, Inc .
Page 72
Table 18. DUT Definition Editor, [Range] Tab Fields
FEATURE DESCRIPTION
Flow Range Unit
(required drop
down list
selection)
Select the DUT flow unit of measure from the drop down list. The final calculated DUT
flow always displays in this unit. The minimum and maximum flow must be entered in the
selected unit.
If the desired flow unit is not on the list, use the <Edit Units> option at the top of the drop
down list to display the <Flow Unit Editor> (see Section 14). All new units created
automatically appear in the list of flow units of measure.
Flow Range Min
Flow
(required numeric
entry field)
Enter the lowest DUT flow in the flow range unit of measure. Typically this value is 0. In
some special cases, the minimum flow is non-zero. Regardless, the value entered must
correspond to the DUT’s
<Min Output> (see below). This is the expected flow when the
DUT’s <Min Output> occurs.
All %DUTFS errors are based on the flow span. Full scale and span are equivalent as long
as the <Min Flow> value is zero. If a non zero value is entered, there will be a discrepancy
between the actual full scale error and the %DUTFS value determined by COMPASS.
If true full scale error is desired, always enter 0 as the <Min Flow> value.
Flow Range Max
Flow
(required numeric
entry field)
Enter the maximum DUT flow in the flow range unit of measure. This is the expected flow
when the DUT’s
<Max Output> occurs.
Resolution
(required list box
selection)
Sets the resolution with which the calculated DUT flow data will be logged and displayed.
Select the desired resolution from the drop down list. This option should be used to adjust
the resolution to a level that is appropriate for the performance of the DUT. Typically,
resolution is set to one order of magnitude greater than the DUT tolerance. By default,
the reference resolution is set to be 1 order of magnitude greater than the resolution
selected in this field.
Output Range
Units
(required drop
down list/text entry
field)
Select the DUT output unit from the drop down list. If the unit is not on the list, type the
unit into the list box. If the output range unit is the flow range unit, the min/max output
fields are automatically set to the min/max flow range fields. If the DUT’s
<Output Type>
on the [Read] tab is <Voltage/Current> , the output unit must be V, mV, A or mA. If the
DUT’s data acquisition mode is <Frequency> , the output unit must be Hz, kHz, MHz or s.
Output Range
Min Output
(required numeric
entry field)
Enter the lowest output (output corresponding to the <Min Flow> ) of the DUT in the
output range unit of measure. If the output unit is the flow range unit, the <Min Flow>
value is copied here and cannot be changed.
Output Range
Max Output
(required numeric
entry field)
Enter the highest output (output corresponding to the <Max Flow> ) of the DUT in the
output range unit of measure. If the output unit is the flow range unit, the <Max Flow>
value is copied here and cannot be changed.
Output Range
Resolution
(required drop
down list
selection)
Sets the resolution with which DUT output (and set) data will be logged and displayed.
Select the desired resolution from the drop down list. The resolution is applied to all
calculated DUT information. This option should be used to adjust the resolution to a level
that is appropriate for the performance of the DUT. Typically, resolution is set to one
order of magnitude greater than the DUT tolerance.
Set Range
Is the DUT a
Controller?
(check box)
Check this field if the DUT is a flow controller. This will cause the DUT to be handled as a
flow controller when tests are run.
DUT’s that have a density correction selected in the DUT Definition [Correction] tab
cannot be set up as flow controllers.