Hardy Process Solutions HI 6500 Series, User Manual

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Chapter 9
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PASS/FAIL and Stability Test
This test computes the variation of the A/D counts. The results show the variance and
indicate pass or fail. The test is valid to help break down the problem into smaller divisions.
Unstable test results can be caused by an internal A/D processor fault, grounding, power
connection, EMI/RFI above specified CE limits, or noisy load cell input.
These numbers reflect a weight change at the smallest measurement of the filter setting, the
internal analog-to-digital converter computer register.
WAVERSAVER TEST
These numbers also reflect weight change at the smallest measurement, the internal analog-
to-digital converter computer register. The internal RAW A to D counts and filtered A to
D counts are displayed for a comparison. A FAIL on the RAW counts and pass on the
filtered counts indicates the WAVERSAVER filtering is necessary and functioning
properly.- except that this reading is averaged using the WAVERSAVER and AVERAGES
setting parameter from the Processor’s configuration. Using the maximum number of
internal averages and the 10ms update speed equals a maximum delay of 2.55 seconds
Weight and Voltage ALL
This test section looks at the readings from ALL the load cells to test overall system
performance and signal voltage readings. This test works for most load cell types.
Further investigation to
isolate system problems
requires the use of hand
tools and multi-meters or
the INTEGRATED
TECHNICIAN Junction
or Summing Box and
using the IT
©
Test section.
NOTE INTEGRATED TECHNICIAN
®
(IT) is a registered trademark of Hardy Process Solutions.
Weight
This displays the amount of force seen by all load cells installed in the summing
junction box. Further investigation to isolate system problems will require the use of hand
tools and Multi-meters or the Integrated Summing Junction box and using the IT test
section.
Millivolt/Volt equals the output from a load cell per each volt of excitation. The HI 6500
series reads the load cell output in mV/V which is a higher resolution (4 decimal places)
reading than a mV reading, thereby providing more sensitivity to enable you to
troubleshoot the condition of the load cell in question under certain conditions. . Load Cells
are rated in Millivolts/Volts.
mV/V
are DC voltage signals between 0-5.0000 mV/V.