DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
© 1998-2003 DH Instruments, Inc .
Page 46
LABEL DESCRIPTION
Set Point Nominal DUT set point. When an asterisk appears next to the value, automatic flow
regulation is active (see Section 8.5.6).
Measured Set Point Measured DUT set point for DUTs that control flow with a voltage (V) or current (mA)
based set point unit. The Set Point DMM in the System Configuration is the source of
this data (see Section 10.2).
6.7.4 AVERAGE DATA RUN SCREEN
Both [Run molbox] and [Run DUT] run modes provide continuous averaging of
flow information. Each time the averaging time counts down to zero, the <Average Data>
run screen is updated with the new average results. In [Run Test] mode, all averaged data
displays in the <Data Grid> run screen so there is no reason to have an independent averaging
run screen. To change the averaging time, click the averaging time box, enter the new time value
and press
<Enter> . This triggers the beginning of a new averaging cycle. Changing the
current gas or K factor also triggers a new averaging cycle. When a non-molbox is used as the
flow reference, only the DUT display fields are active and all reference fields display as N/A.
Table 12 provides information on each field of the <Average Data> run screen.
The mouse pointer changes into a wand when the cursor is placed over any of the fields
that support unit of measure changing. Click the field to get a pop-up menu of other
display unit options. The DUT flow unit, output unit, set unit, and %DUTFS are the
available choices. Click the DUT or reference fields to change their display units.
Figure 24. <Average Flow Data> Run Screen