DH Instruments COMPASS FOR MOLBOX, Руководство пользователя

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COMPASS

for molbox™ User’s Manual
© 1998-2003 DH Instruments, Inc .
Page 184
FEATURE DESCRIPTION
Status Character display representing the status of the point taken. Many combinations
of these values may exist for any given point. The definitions of the characters are:
•
OK - Flow was stable and within tolerance (see Sections 8.5.5, 9.5.4).
•
T - Error was beyond the DUT specified tolerance specified in the DUT
Definition (see Section 8.5.5).
•
s - Reference flow did not meet the flow stability criterion within the stability
timeout specified in the Test Definition (see Section 9.5.4).
•
S - At least one unstable reading was recorded during the averaging time
(see Section 9.5.4).
•
t - A tare occurred, view results in the <Tare> columns (see Sections 9.5.2, 9.5.5).
•
M - The reference molbloc was changed. The new molbloc information is in
the <molbloc> column (see Section 9.5.2).
•
L - Leak test failure after a molbloc change (see Section 9.5.2, 9.5.7).
•
P - Purge failure after a molbloc change (see Section 9.5.2, 9.5.8).
•
E - An interface error occurred during the averaging cycle. Generally, this
indicates a reading could not be made on the reference flow device.
Stab Time
Time elapsed to reach valid flow stability within the stability criterion specified in
the Test Definition
[Sequence] tab (see Section 9.5.4). If a stability time-out
occurred, the value displays as N/A.
Avg Time
The amount of time over which the data was averaged (see Section 9.5.4). For tests
that specify a fixed averaging time, variances in this value are a result of
systematic delays in the current System Configuration (see Section 10.2). Ideally the
averaging times are always the same, however, it is possible for the averaging
time to end just as a new command is issued to a supported instrument.
The average will not complete until this value is returned.
Set Pt Nominal flow set point in the set point unit of measure specified in the Test Definition
(see Sections 9.5.2, 9.5.3). When the measured set point is not available,
the nominal set point is used to determine set point errors.
Raw Ref Q Unmanipulated molbox flow in the mass flow units specified on the [Tools] ,
[Options] , [molbox] tab (see Section 11.2). If the flow reference is not a
molbox, this value is N/A. Do not use this value as the value of the reference flow.
Use Ref Q DUT Cond.
Ref Q DUT
Cond
This is the value that should always be used for the reference flow.
If the DUT Definition [Correction] tab (see Section 8.5.3) specifies no density
correction, the <Ref Q DUT Cond> is equal to <Ref Q> immediately below. If
the DUT Definition [Correction] tab does specify a density correction, the
reference flow value is corrected to express the flow that would be present at the
DUT if the DUT were at its normal operating conditions. This correction allows
the reference flow and DUT indication to be compared even though the DUT is
not at its normal operating conditions.
Ref Q
Reference flow in the DUT Definition’s flow unit of measure. Never includes a
density correction. Do not use this value as the reference flow, use
<Ref Q DUT
Cond> above as it is valid in all cases.
DUT Q DUT flow (flow measured by the DUT) in the DUT Definition [Range] tab’s flow
unit of measure (see Section 8.5.4). The value is determined from the average
DUT output value.
DUT OUT DUT output in the DUT Definition [Read] tab’s output unit of measure
(see Section 8.5.8).