3. OPERATION
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© 2007 DH Instruments, a Fluke Company
PRINCIPLE
The AutoTest function is intended to facilitate the execution of a series of pressure control
target values such as is commonly needed when PPCH-G is used to run a calibration
sequence on a device or system being tested.
There are two types of sequences:
Quick Test
Allows quick definition and execution of a sequence
in
the current range and using all of the current
settings
(pressure unit of measure, measurement
mode, control mode, control settings, display resolution).
Quick DUT Test (QDUT)
AutoRanges PPCH-G based on the full scale and
tolerance of a device under test
, prompts the user
through the increments of a calibration sequence and
logs calibration data. The first portion of the QDUT
function can be used alone to automatically set
PPCH-G
range and operating characteristics appropriately for the
device under test. The sequence function assumes that
the pressure at each target point will be adjusted so that
the device under test reads a cardinal target pressure point.
This is particularly useful when calibrating analog gauges.
Test sequences are defined by the minimum pressure, maximum pressure and test
increment in % of full scale. For tests, in gauge mode, the minimum pressure is always zero.
For tests in absolute mode, the minimum pressure is defined by the user.
OPERATION
To run an AutoTest press
[AutoTest]
from the MAIN RUN screen.
The display is:
Run an AutoTest: IH
1Quick 2QDUT
Select the test type desired. See Section 3.3.6.1 for Quick Test or Section 3.3.6.2 for
QDUT Test.
3.3.6.1
QUICK AUTOTEST
OPERATION
To run a Quick Test, press
[AutoTest]
and select
<1Quick>
.
The display is:
Run current IH
QuickTest 1yes 2no
This selection provides the choice between running the last Quick Test or setting
up a new Quick Test definition. Select
<1yes>
to rerun the last Quick Test.
Select
<2no>
to define a new Quick Test.
When
<2no>
is selected from the Run current QuickTest menu, the set-up/edit
routine is accessed. The first display is:
1.
Entry field for maximum pressure of the Quick
Test sequence. Recalls value last entered.
Quick Test FS: IH
50 MPa g
This entry determines the maximum pressure of the Quick Test sequence. Enter
the maximum pressure and press
[ENT]
.
