DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
Page 185
© 1998-2003 DH Instruments, Inc .
FEATURE DESCRIPTION
DUT Set
Measured DUT set point. This value is present only when a the Test Definition
[Data] tab specifies set point measurement (see Section 9.5.9).
DUT P
Gas pressure at the DUT in the DUT Definition’s normal operating pressure unit
of measure (see Section 8.5.3). A value is present only if DUT pressure logging
was required.
DUT T
Gas temperature at the DUT in the DUT Definition’s normal operating
temperature unit of measure (see Section 8.5.3). A value is present only if DUT
temperature logging was required.
%FS Err
Percent of span error calculated from the DUT and reference flows and the
DUT’s span. Span and full scale errors are the same as long as the DUT’s
<Min Flow> value is 0 (see Sections 8.5.4, 19.4).
%Rdg Err
Percent of reading error calculated from the DUT and reference flows
(see Sections 8.5.4, 19.4).
%FS Set Err
Percent of span error calculated from the reference flow, the DUT span and the
measured or nominal set point. If the measured set point is not available,
the nominal value is used. Span and full scale errors are the same as long as
the DUT’s
<Min Flow> value is 0 (see Sections 8.5.4, 19.4).
%Rdg Set Err
Percent of reading error based on the reference flow and the measured or
nominal set point. If the measured set point is not available, the nominal value is
used (see Section 8.5.4, 19.4).
SD DUT Q
Standard deviation of the DUT flow over the averaging period. This value is set
to N/A when less than two points are logged during the average.
# DUT Pts
The number of DUT measurements taken during the averaging period.
This number may not be the same from point to point and may not be equal to
the
<# Ref Pts> value. Systematic delays with the System Configuration and
basic instrument response time make it possible for some instruments to
communicate faster than others (see Section 10.2).
Min Ref Q
Minimum reference flow measured during the averaging period.
Max Ref Q
Maximum reference flow measured during the averaging period.
SD Ref Q Standard deviation of the reference flow during the averaging period.
# Ref Pts
The number of reference flow points measured during the averaging period. This
number may not be the same from point to point and may not be equal to the
<# DUT Pts> value. Systematic delays with the System Configuration and basic
instrument response time make it possible for some instruments to communicate
faster than others (see Section 10.2).
Up P
molbloc upstream pressure as measured by the molbox.
Down P
molbloc downstream pressure as measured by the molbox.
DP
molbloc differential pressure across the molbloc as measured by the molbox. If a
molbox RFM with an active micro range is the reference, this field represents the
micro range RPT measurement.
molbloc Re
molbloc flow Reynolds number as calculated by the molbox.
molbloc T
molbloc temperature as measured by the molbox from the molbloc PRTs.
Tare
The molbox RPT tare in effect when the point was taken.
Micro Tare
The molbox RFM micro range RPT tare in effect when the point was taken
(available only when using a molbox RFM with microrange as the reference).
molbloc
Serial number and range of the molbloc in use when the data point was taken.
When changing molblocs during tests, this field can be useful to make sure that
the correct molbloc was used when the point was taken.
Auxiliary
Data 0 – 9
Auxiliary Data fields are used to hold any auxiliary data entered manually or
automatically logged by
COMPASS (see Section 10.3.7).