Hardy HI 6600 Series Modular Sensor System - Manual (Page 36)

HI 6600 Series Modular Sensor System User Guide
Page | 36
A load cell must be mounted so that 100% of the load (Vessel
w/Contents) passes vertically through the load cell.
Verify that nothing is binding the load cell. This means that
nothing is draped across the scale/vessel or the load cell, such as a
hose, electrical cord, tubes, or other objects. Verify that nothing is
in contact with the scale/vessel other than service wires and
piping that have been properly mounted with flexible
connections. Flexible pipes are not to be used in any other than the
horizontal plane and are not to be used to correct pipe alignment
problems. Vertical or at angles other than horizontal will have an
effect on the scales ability to repeat and provide accurate weight
readings.
Electrical Check Procedures
Load Cell/Point Input/Output Measurements
The HI 6610 WPM instrument is designed to supply
5 VDC excitation to as many as four 350-Ohm load
cells/points per channel. The expected output from
each load cell/point will depend on the mV/V rating
of the load cell/point and the weight.
For example, a 2mV/V load cell/point will respond
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. Thus, if the load
cell/point weight capacity is rated at 1000 pounds,
the load cell/point 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.
AVERTISSEMENT – Lier sur une échelle / récipient ou cellule de charge ne
permet pas la cellule de charge libre circulation verticale et peut empêcher
l'appareil de revenir au point de référence zéro d'origine.
WARNING - Binding on a scale/vessel or load cell does not allow the load cell free
vertical movement and may prevent the instrument from returning to the original zero
reference point.