Fluke HPMS - Manual (Page 55)

3. OPERATION
Page 45 © 2007 DH Instruments, a Fluke Company
• <DUT tolerance:>: Enter the DUT measurement uncertainty, accuracy or
precision specification as desired in
± % FS (percent of full scale). This value will
be used to determine appropriate RPM4 resolution and stability test settings.
• <Test increment:>: Enter the test increment in % FS of the DUT.
When executing the test, the test increments will be from zero to the DUT full
scale, dividing by the value of the increment. If a non-even increment value is
entered, the actual increments will be rounded to the lower number of
increments. For example, if the DUT full scale is 10 000 psi and the increment
specified is 42 %, the Sequence will run points of 0, 5 000 and 10 000 psi
because 42 % goes into 100 less than three but more than two times.
• <Test point sequence:>: Select <1up> for the AutoTest sequence to run
from zero to the DUT full scale; <2down> for the sequence to start at the
DUT full scale and run down to zero, <3u&d> for the sequence to run from
zero to the DUT full scale and back to zero; <4d&u> for the sequence to run
from the DUT full scale down to zero and back to the DUT full scale.
After the last test definition entry, a screen is offered for the user to check that
the correct test has been defined or selected and that it does not exceed the
range of the device or system being tested. :
1. Indication of minimum and maximum
pressure included in the sequence which is
about to run.
ENTER to run psi g
0.000 to 5000.0
Pressing [ESC] returns to the AutoTest selection screen without AutoRanging the
RPM4 and without sequence execution. Pressing [ENT] causes the RPM4 to
AutoRange based upon the DUT characteristics (see Section 3.3.4) and the
AutoTest proceeds to text execution (see Section 3.3.10.2). To AutoRange the
RPM4 based on DUT characteristics but not run a test sequence, [ESC] right
after AutoRanging completes (at the <Set valve for …> screen).
3.3.10.2 TEST EXECUTION
The last step of test initialization is to AutoRange the RPM4 (see Section
3.3.10.1), then test execution begins.
The first step of test execution is to set
the HPMS Lo Q-RPT isolation valve
correctly for the Q-RPT that will be used
to run the test (see 3.2.5). The RPM4
display is (<XX> is Lo or Hi):
Set valve for XX RPT
Set supply to DUT FS
Set the HPMS isolation valve to shut off or use the RPM4’s Lo Q-RPT as indicated
by the HPMS valve indicator LED (see Section 3.2.5). Turn the valve knob fully
towards the lit valve indicator LED until it reaches its stop. If using a GPC1 to adjust
pressure, set the GPC1 supply regulator so the GPC1 supply is equal to the DUT full
scale pressure (see the GPC1 Operation and Maintenance Manual). Press [ENT]
when ready to proceed with the test.
To abort the test but use the RPM4 with the settings for the DUT that was
initialized, press [ESCAPE] from the <SET VALVE FOR xx PRT> screen. This can be
useful for setting up the RPM4 to make DUT adjustments or run tests other than
the one defined by the AutoTest.