F/T DAQ Installation and Operation Manual
Document #9610-05-1017-06
ATI Industrial Automation, 1031 Goodworth Drive, Apex, NC 27539 USA +1-919-772-0115 www.ati-ia.com
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The internal structure of the transducers can become clogged with particles and will become
uncalibrated or even damaged.
Periodic calibration of the transducer and DAQ card is required to maintain traceability to
national standards. Follow any applicable ISO-9000-type standards for calibration. ATI
Industrial Automation recommends annual recalibrations, especially for applications that
frequently cycle the loads applied to the transducer.
6.4 A Word about Resolution
ATI’s transducers have a three sensing beam configuration, where the three beams are
equally spaced around a central hub and attached to the outside wall of the transducer. This
design transfers applied loads to multiple sensing beams and allows the transducer to
increase its sensing range in a given axis if a counterpart axis has reduced loading (see
Section 7.2’s compound loading information).
The resolution of each transducer axis depends on how the applied load is spread among the
sensing beams. The best resolution occurs in the scenario when the quantization of the
gauges is evenly distributed as load is applied. In the worst case scenario, the discrete valve
of all involved gauges increases at the same time. The typical scenario will be somewhere in
between these two.
F/T resolutions are specified as typical resolution, defined as the average of the worst and
best case scenarios. Because both multi-gauge effects can be modeled as a normal
distribution, this value represents the most commonly perceived, average resolution. The
DAQ F/T resolutions are based on real-number calculations and do not result in clean
fractions. To express the values as clean fractions, we simply use the values that a 16-bit
DAQ card could achieve. Although this misrepresents the actual performance of the
transducers, it results in a close (and always conservative) estimate.
6.5 Environmental
The standard F/T system is designed to be used in standard laboratory or light-manufacturing
conditions. Transducers with an IP65 designation are able to withstand dusty environments,
as well as wash down.
Storage Operation Units
9105-TIF Transducer -5 to 75 0 to 60
o
C
9105-TW Transducer -5 to 120 -5 to 120
o
C
PS box -30 to 75 0 to 60
o
C
IFPS box -30 to 75 0 to 60
o
C
Note: These temperature ranges specify the storage and operation ranges in which the
transducer can survive without damage. They do not take accuracy into account.
Table 6.1—Transducer Temperature Ranges
6.6 Accuracy Over Temperature
Typical errors introduced over temperature for F/T transducers with hardware temperature
compensation are listed below. These changes in sensitivity are independent of the
transducer’s rated accuracy at room temperature; the two accuracy ratings must be added to
find an overall estimated accuracy at a certain temperature. This overall accuracy assumes
that the unloaded and loaded measurements were taken at the same temperature.
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