Seed Hawk Hydraulic Drive 2010 Calibration Guide - Manual (Page 9)

Seed Hawk
®
Manual Calibration Guide
8
Rate Check
Product Application Rate Check Calculation
Seed size, seed type, seed coatings, seeding speed, product
settling and other variables all have an effect on the actual
product application rate (To use this method you
MUST know the
density (lb/cu.ft) of the product being calibrated). This Rate
Check calculation compares actual weight of product seeded to
actual acres applied.
Step 1: Fill tank to a known level, or a known amount of product.
(Note Tank Level, Figure 1)
Step 2:
Perform a regular calibration.
Step 3: Seed for (X) amount of acres, record the amount of
acres applied. (NOTE: the more acres seeded, means a larger
sample which will make the rate check more accurate)
Step4:
Initial Volume - Final Volume = Volume of product used (Cu.ft)
Check tank level, cross reference Figure 1 to find the
volume of product used.
(Note: ladder rungs are reference points)
Step 5:
Multiply the known density of the product in the tank by
the volume of product used.(Value found in Figure 1)
Step 6: Adjust cal weight accordingly; Multiply cal weight by the
correction factor. Enter the new cal weight into the monitor.
Note:
See Example 1 for calculation example and operator
worksheets for Rate Check work pages