TeeJet ARC-6000 - Manual (Page 17)

2-7
98-0501
Rev.- 1
ARC 6000
CE & S
TANDARD
V
ERSION
2.6.1.5. SETTING THE CORRECTION FACTOR (Psi Mode)
If you will be spraying water solutions, the correction factor should be set to 1.00. If you will be spraying a solution with a specific
gravity different than that of water, adjust the correction factor according to the following chart.
Weight of Solution Correction Factor
7.0 lbs/gal .92
8.0 lbs/gal .98
8.34 lbs/gal - Water 1.00
9.0 lbs/gal 1.04
10.0 lbs/gal 1.10
10.65 lbs/gal - 28% Nitrogen 1.13
11.0 lbs/gal 1.15
12.0 lbs/gal 1.20
14.0 lbs/gal 1.30
To enter the correction factor, go to APPLICATION RATE and SETUP mode. Use the
INC/DEC switch to adjust the correction factor.
2.6.2. CALIBRATING THE GRANULAR APPLICATION
Check to be sure the correct application program has been selected (see section 2.1.)!
2.6.2.1. SETTING THE PRODUCT DENSITY
ARC needs to know the product density in order to control the application rate. IF PRODUCT DENSITY IS NOT COR-
RECT, THE APPLICATION RATE WILL NOT BE CORRECT. Product density is entered as pounds per cubic foot.
Product density should be measured and entered with each load of product.
A. Set the console switches to the following positions:
Power ON
Mode Selector SETUP
Display Selector APPLICATION RATE
The display will show the current product density.
B. Use the INC/DEC switch to set the display to the desired density.
2.6.2.2. CALCULATING THE INITIAL CALIBRATION NUMBER
It is necessary to enter a spreader constant in ARC to ensure an accurate output from the conveyor. The spreader constant is
the number of sensor pulses per cubic foot of material discharged. The constant is different for different gate height settings
on adjustable spreaders. Constants relating to particular gate height settings should be calibrated and recorded for the
spreader.
Calculation of the initial spreader constant requires the following information; 1) Gate height (H) and width (W), in inches,
2) Number of sensor pulses for each revolution of the spreader rate sensor (P), 3) The distance the conveyor moves during
one revolution of the spreader rate sensor (D), in inches.
Calculate the initial spreader constant as follows:
( D x W x H ) / 1728 = Ft 3
r
Where; Ft 3
r
is the volume discharged during each revolution of the spreader rate sensor, in Cubic Feet.
Continue as follows:
P / Ft 3
r
= Initial Calibration Number (Spreader Constant)