Chapter 6 – Troubleshooting
Hardy Process Solutions HI 6200 Weigh Processor User Guide
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For example, a 2mV/V load sensor responds with a maximum of 10 mVDC at the load
sensor’s full weight capacity, which includes the weight of the vessel and the weight of the
product as measured by the load cell/point. Consequently, if the load sensor’s weight
capacity is rated at 1000 pounds, the load sensor will be 10 mVDC at 1000 pounds, 7.5
mVDC at 750 pounds, 5 mVDC at 500 pounds and so on.
A zero reference point will vary from system to system, depending on the “Dead Load” of the
vessel. “Dead Load” is the weight of the vessel and appurtenances only, with no product
loaded. In our example, we will assume the dead load to be 500 pounds.
Note:
The operating range for the scale in this example is 5-10 mVDC, with a 500
pound weight range. After zeroing the instrument, the 0 reading refers to the zero
reference point and not absolute 0 mVDC or absolute 0 weight.
Note:
Load sensor measurements are checked with a digital voltmeter at the load
cell connector on the front of the module or by using INTEGRATED TECHNICIAN
with a Hardy IT Junction Box. The scale calibration must be completed to enable
IT to work properly.
6.3.2 Load Check
Place a load (weight) on the scale or vessel, and check that the weight reading on the input
table changes in the proper direction.
For example, if the display reads 100 pounds and a 20-pound weight is placed on the vessel
or scale, the display should read 120 or some value over 100. With the display reading 100
