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CD Start Page | DATA ACQUISITION ONLINE Page | DATA ACQUISITION PRODUCTS Page |
Storage Modes
The Model OM-190 datalogger offers five modes of storing data; Adaptive Store, Point
Store, Enhanced Point Store, Store on Alarm and Manual Store.
Adaptive Store
Adaptive Store is a process designed to collect data in a most efficient, accurate way
allocating memory to data storage based on signal dynamics. The result is that both trends
and anomalies are accurately recorded. The datalogger samples as fast as possible to
provide a true picture of transients, applying more memory to them than to trend data. The
sample rate is fixed at 500 ms for recording lengths under 8 days, 1 second for recording
lengths of 8 to 15 days and 2 seconds for recording lengths over 15 days. This is the best
mode for capturing anomalies and trend data over long periods of time and is the most
efficient use of memory. Maximum recording length is 999 days. Sample rate is always
500 ms with recharger plugged in.
Point Store
The Point Store mode is found in most conventional dataloggers. The storage principal is
that every sample taken is stored in memory with its associated time. With the OM-190,
you have the ability to select the sample rate and the length of the recording facilitating
optimum use of the datalogger's memory. Either variable can be respecified during setup.
If the combination of these two variables is not compatible, the last variable programmed is
the primary condition and the OM-190 will respecify and display the other to be within the
system capability. Available sample intervals are 12, 8, 4, 3, 2 and 1 hours; 30, 15, 10, 5,
2, and 1 minutes; 30, 10, 5, 2 and 1 seconds; 500, 250, 125 and 62.5 ms. The recording
length is programmable between 1 second and 999 days, an ideal mode for long term trend
recording at fixed intervals.
Enhanced Point Store
This is a variation of Point Store and Adaptive Store modes. In this mode, data is stored as
described above in the Point Store mode with the additional advantage of being able to
store the maximum and minimum values and their associated times as they occur between
the sample interval selected and the average of all samples in the sampling period. This
way much more information is available for analysis. The available sample intervals are the
same as in Point Store mode, however, the maximum primary rate is 10 seconds. The
secondary sample rate is one second for recording of 7 days or less and two seconds for
recording longer than 7 days. This mode is the ideal choice for collecting data at required
intervals and for detecting anomalies needed for analysis and troubleshooting at the same
time. Anomalies are detected and stored because of the faster secondary sample rate.
Store On Alarm
The Store on Alarm mode also offers two alarm storage techniques called Burst and
Continuous. In Burst mode, data will be stored for an alarm condition at the secondary
sample rate for a predetermined number of samples before and after the alarm detection.
Storage will then resume at the primary sample rate. The predetermined number of
samples is calculated by the ratio of primary to secondary storage rate with a maximum
number of ▒50 for 7 or less channels and a maximum of ▒32 for 16 channels. For xample,
if the primary storage rate is every 10 seconds and the secondary storage rate is every one
second, then the ratio would be 10 and the number of burst samples would be ▒10 from
the alarm threshold. If the primary rate is 30 seconds and the secondary rate is one second,
then the number of burst samples would be ▒30.
Manual Store
The Manual Store mode is very useful for collection of data that may not be time related. In
this mode, data points are stored for all active hannels at the operators discretion. Storage is
initiated by pressing the right hand key on the datalogger for every desired sample to be
stored. Each sample is stored with its associated time and date as well as a sample number
sequentially assigned by the OM-190. For an OM-190 datalogger with 512K memory, the
total number of samples that can be stored for the worst case (32 active channels) would
not be less than 7323. For one active channel it would be approximately 83,000.
SWD-PRONTO-WIN Windows Software
Pronto for Windows is a full featured Windows based program that is included with the
OM-190 Series dataloggers. Through the use of straightforward macros and keyboard
commands, the operator can graph and analyze data and create hard copy reports. Selection
of icons from the toolbar makes all commonly used instructions such as zooming,
statistical analysis, printing, annotation and playback as easy as pointing and clicking the
mouse. File management is greatly improved through the use of projects which define how
the data will be stored and grouped and views which define how the data will appear on
screen and in reports. Easy to follow dialog boxes provide step-by-step choices for all data
management tasks. A multifunctional communication set allows interface to dataloggers by
serial port, local area network or modem, all in the same program. A comprehensive
context sensitive help system provides detailed instructions anywhere in the program.
Interface to other application software such as spreadsheets or word processors is quick
and easy using the Windows clipboard or object linking (OLE).
VIEW an Adobe Acrobat pdf file for more product info (requires Acrobat Reader).
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