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As a policy of continual improvement, STAUFF reserves the right to alter the specification without prior notice.
201.031
Date of Issue: 06 November 2018
6.3.3.1 General
Some general information about the connected LPM unit is available. The Identification shows the LPM
serial number and software version. The serial number, together with the test timestamp, uniquely
identifies the test record. These two parameters are the ones used to avoid duplication of test records.
Current Time shows the time set on the LPM. It is important that this is correct since this is used to
timestamp the tests. Pressing the Set button automatically synchronizes the LPM time to that on the
computer.
The calibration area displays the date last Calibrated and the next Calibration Due date.
6.3.3.2 Test Number
The Test Number can be used to help identify a test within a sequence. However it is automatically reset
when the LPM is powered up, so instead relying on the timestamp (date and time of test) and test
reference is preferred.
Figure 6.21
NOTE: if the LPM is power cycled at any point then the test numbering sequence automatically resets
and begins again.
6.3.3.3 Test Duration
The length of the test is controlled by the Test Duration, see figure 6.21 for location.
The factory set value of 2 minutes is suitable for most applications, but the user is free to set a different
value. Shorter times will make the LPM more responsive to short-term fluctuations in contamination
level. It will also result in less consistent results for the large particle sizes and clean systems, due to
statistical fluctuations in the number of particles counted.
Longer tests will allow more
“stable” results in very clean systems and for the larger particle sizes, since
there will be a larger total number of particles counted during the test. This means that any fluctuations
have less of an effect on the test result.
6.3.3.4 Result Display
Use the selector to choose the preferred display Format (ISO, NAS etc.). This selection is not just
cosmetic since it also determines how the cleanliness alarm targets are to be interpreted, if these are
used. See figure 6.21 for the location, it is defined as the format.
6.3.3.5 Simulated Test
This setting can be used when there is no flow available but communications need to be tested. This is
the box ticked in figure 6.22