3. OPERATION
Page 31 © 1998 DH Instruments, Inc.
3.2.5.2 SETTING UP/EDITING A FILE SEQUENCE
See Section 3.3.3.
3.2.5.3 RUNNING A SEQUENCE
OPERATION
Selecting 1Yes in the Run current quick sequence menu causes the current quick
sequence to execute.
Entering a valid sequence file number from the Run Sequence File # causes a file
sequence to execute.
A Quick Sequence executes in the current range with the current settings. A File
Sequence sets up the range and other settings as specified in the sequence file
(see Sections 3.2.5 and 3.3.3.)
When initializing execution of a quick sequence, PPC2 AF checks: a) if the
sequence full scale pressure exceeds the current upper limit; b) if PPC2 AF is
in absolute measure mode, that the sequence does not contain negative
values. If either of these conditions exists, an error message will be
displayed and the sequence will not be run.
To run a file sequence that specifies a reference pressure transducer range
other than the current range, PPC2 AF must be vented because the range
cannot be changed when PPC2 AF is not vented.
To run a file sequence, the sequence file number selected must already have
been setup using 3Sequence under the SETUP menu (see Section 3.3.3)
The first display is:
1. Maximum pressure of the sequence that is
about to run.
Enter runs sequence
100 psi a FS
This screen is offered as a means for the user to check, prior to execution, that
the correct sequence is selected and that it does not exceed the range of the device or
system being tested. Pressing ENTER causes sequence execution to proceed.
Pressure control will begin to set the first target value of the sequence (or vent will
execute if the first increment is zero gauge pressure). The display is the Main
Run Screen (see Section 3.1.1) with indication of the sequence progress:
1. Sequence increment that is currently being
controlled/total increments in sequence.
Changes to countdown time remaining during
count down time following "ready" condition
when sequence next increment is on timed
delay rather than on ENTER.
*PRESSURE1#UNITMH SR
TPRESSURE2#CC##NN/NN
Except for the bottom right hand corner, this display is identical to the normal
main run screen (see Section 3.1.1). The bottom right corner provides
information on sequence execution. This information updates as each sequence
increment is executed.
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