Hardy HI 1756-nDF - Manual (Page 22)

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Chapter 4
The flow rate is affected by the composition of the material, for example liquids will
provide a linear flow rate as they are dispensed compared to “lumpy” material which due
to product binding and asymmetric shape will cause short term disturbances in the weigh
reading and subsequent flow rate calculations.
To provide a reliable flow rate reading with a range of materials the following four flows
rate filters are provided, see the “flow Rate Filter” parameter in the table below.
Parameters for configuring the flow rate calculation are detailed in the following tables:
DINT Configuration Parameters used in Flow Rate Control
Parameter Default Description
Weight Unit 3 Weight unit selection
Value Frequency (Hz)
0 Pounds(lb)
1 Ounces(oz)
2 Ton(ton) short ton
3 Kilograms(kg)
4 Grams(g)
5 Metric Tonnes (t) long ton
Flow Rate
Period 0
Flow Rate options
Ref# FR unit of time
0 seconds
1 minutes
2 hours
Weight Filter 2 The weigh scale data used in the weight calculation can
be derived from one of three filters. The selection is
based on a compromise between the response time
required and the inherent noise within the measured
value.
FILT Function
0 Raw ADC data samples
1 Low Pass filter
2 Waversaver output data
Material 0 The material texture can cause fluctuations in the
instantaneous weight readings. To compensate for these
periodic fluctuations set to 0 for liquids and fine
materials and 1 for coarse materials.