PPCH™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company
Page 48
Enter the desired pressure increment and press
[ENT]
.
The display is:
Test point sequence
1up 2down 3u&d 4d&u
This selection determines the order in which the test sequence increments will
execute. Selecting
<1up>
causes the sequence to execute starting at the low
point and going to the full scale value.
Selecting
<2down>
causes the sequence to run starting at the full scale value
and going to the low point.
Selecting
<3u&d>
causes the sequence to run from low point to full scale and
back to low point.
Selecting
<4d&u>
causes the sequence to run from full scale to low point and
back to full scale.
After making the increment order selection
the display is:
Next point on:
1ENTER 2Timer
This selection determines how the sequence will proceed from point to point
when the test is run.
If
<1ENTER>
is selected, the sequence proceeds to the next target value
whenever, and only whenever,
[ENT]
is pressed.
If
<2Timer>
is selected, a timer is started at each point when a pressure
Ready
condition is achieved (see Section 3.2.3). The sequence continues to the next
pressure point without operator intervention once the timer has expired. After
selecting
<2Timer>
, an additional screen is presented for entry of the timer value
in seconds (minimum 1, maximum 999).
After making the next increment on selection, the display is:
1. Indication of minimum and maximum
pressure included in the sequence which is
about to run.
ENTER to run MPa g
0.000 to 50.000
This screen is offered for the user to check, prior to execution, that the correct
sequence is defined and that it does not exceed the range of the device or system
being tested. Pressing
[ESC]
returns to theAutoTest selection screen without
sequence execution. Pressing
[ENT]
causes sequence execution to proceed.
Pressure control begins to set the first target value of the sequence (or vent
executes if the first increment is zero). The display is the MAIN RUN Screen with
indication of the sequence progress:
1. Indication of sequence increment that is
currently being executed / total increments in
sequence. Changes to ENTER or countdown
time remaining once
Ready
condition has
been reached at target value.
8.232 MPa g IH
T 10.000 D 2/11
Except for the bottom right hand corner, the sequence run 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 completed.
If the sequence was set up with
<Next increment on timed delay>
, execution
proceeds automatically each time a
Ready
condition has occurred at the
increment and the countdown timer has expired. If the sequence was set up with
<Next increment on ENTER>
. Press
[ENT]
to continue to the next increment.
