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Raven ISOBUS Product Control User Manual

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Manual No. 016-0171-362 Rev. F 61
Percent Tier Disable - The Percent Tier Disable is used to determine the percentage of the maximum tier rate at
which tiers are disabled as the required volume per minute decreases. Using a Percent Tier Disable value allows
the control valves to adjust the target rate more quickly as the required rate decreases.
FOR EXAMPLE:
A machine has a tiered boom configuration with the following capacities:
Tier 1 Capacity up to 25 GPM [94.6 L/min]
Tier 2 Capacity up to 38 GPM [143.8 L/min]
Using the given capacities, the following values should be entered as the Tiered Boom Settings:
Tier 1 Max. = 25 GPM [94.6 L/min] x 0.8 = 20 GPM [94.6 L/min]
Tier 2 Max. = 38 GPM [143.8 L/min] x 0.8 = 30 GPM [143.8 L/min]
Thus, as the volume per minute increases, the following tier switching should occur:
10 GPM [37.8 L/min] increasing to 20 GPM [75.7 L/min] = only tier 1 enabled
20 GPM [75.7 L/min] increasing to 30 GPM [113.6 L/min] = only tier 2 enabled
30 GPM [113.6 L/min] increasing to maximum flow rate = tier 1 and tier 2 enabled
NOTE: Percent Tier Disable only affects tier switching when the required volume per minute is decreasing.
As rates begin to decrease from maximum, the Percent Tier Disable value is figured in. Thus, using the Tier 2 Max
of 30 GPM [113.6 L/min] previously calculated and with the Percent Tier Disable set to 10%, tier 1 and 2 will switch
to only tier 2 when the target rate decreases to 27 GPM [102.2 L/min].
So, for rates in gallons per minute:
30 GPM – (10% of 30 GPM) = 30 GPM – 3 GPM = 27 GPM
or, for rates in liters per minute:
113.6 L/min – (10% of 113.6 L/min) = 113.6 L/min – 11.3 L/min = 102.3 L/min
In operation, as the volume per minute decreases, the following boom tier switching should occur.
Maximum flow rate decreasing to 27 GPM [102.2 L/min] = tier 1 and tier 2 enabled
27 GPM [102.2 L/min] decreasing to 18 GPM [68.1 L/min] = only tier 2 enabled
18 GPM [68.1 L/min] decreasing to 10 GPM [37.8 L/min] = only tier 1 enabled
121212
10 - 20 GPM 20 - 30 GPM 30 GPM- Max. Flow
37.8 - 75.7 L/min 75.7 - 113.6 L/min 113.6 L/min - Max. Flow
121212
Max. Flow - 27 GPM 27 - 18 GPM 18 - 10 GPM
Max. Flow - 102.2 L/min 102.2 - 68.1 L/min 68.1 - 37.8 L/min

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Raven ISOBUS Product Control Specifications

General IconGeneral
BrandRaven
ModelISOBUS Product Control
CategoryControl Unit
LanguageEnglish

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