
DISOCONT® Tersus (DT-9) Configuration and Operations Manual
©Schenck Process Group
10
Abbreviation
Meaning
Explanation
Unit
I
Actual feed rate
The actual amount of
material delivered per
unit time
Lbs/hr, Lbs/min, USTons/hr,
Kg/hr, Kg/min or Metric Tons/hr
P
Feedrate setpoint
The desired amount of
material delivered per
unit time
Lbs/hr, Lbs/min, USTons/hr,
Kg/hr, Kg/min or Metric Tons/hr
Z
Totalized amount
Weight of material
delivered since last
counter reset
Lbs, US Tons, Kg or Metric tons
V
Belt speed
Feeder belt speed
Inches/sec, m/sec
Q
Belt load
Weight of material per
unit of belt length.
Lbs/inch, Kg/m
QB
Platform load
Lbs, Kg
Y
Controller magnitude
Output signal
magnitude
mA
Xd
Deviation
Difference between
the actual feedrate
and the feedrate
setpoint.
%
3.3 Measuring Principle
The belt weighing system is designed to continuously weigh the amount of material transported on
the feeder belt. The actual weight of material transported is calculated by multiplying the feeder belt
load, in lbs/inch, times the feeder belt speed. The systems used to measure these two values are
described below.
Belt Load
The feeder weight signal is generated by two load cells that support a single weigh roller. Two weigh
span rollers are located on each side of the weigh roller to accurately define the length of belt (and
amount of coal) being supported by the weigh roller.
Since the load cells only support half of the weight on the weigh span (each load cell supports 25
percent of the total weight) the effective platform length (Leff) is calculated as:
Leff = Lg / 2
Leff = Effective platform length
Lg = Total platform length
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