Teejet 844 Sprayer Control User Manual download pdf (Page 27)

Liquid Specific Gravity (Density)

Default = 1.00

While in the Liquid Specific Gravity (Density) Programming Step, the D

symbol, will be flashing at the top of the console display.

The default value of “1.00” corresponds with the specific gravity of water and is

correct for most pesticide applications. Occasionally some spray solutions, such

as fertilizer, have different densities. If you are using such a material, a new value

should replace the default value. The chart to the left can help you determine the

specific gravity of other solutions.

To change the default value to your new value, use the or keys to change

the value in the display. Depressing the and keys simultaneously will

clear the value to zero. To accept the value and advance to the next

programming step, depress the key.

If the solution that you are using can not be found on the chart at the left, the

Specific Gravity can be calculated as follows:

Weight of Solution

Specific Gravity = ———————————

Weight of Water

NOTE:To activate this specific gravity number, while in the Application

Setup Mode, depress the Auto/Man key so the “D” is displayed at the top of

the screen. When the “D” is displayed, all calculations performed will use

the specific gravity programmed in this step.To remove the “D” depress

the Auto/Man key. When the “D” is not displayed all calculations performed

will use the specific gravity of water (1.00) regardless of whether another

density is programmed into this step or not.

Communications

Default = no cON (no communications)

If your 844 has been upgraded to be communications compatible, this step lets

you select what type of communication you will be using. The choices available

are the default of “

no cON” (no communications), “prt” (Printing Capability), “gps”

(Global Positioning Communication Capability), or “

lOg” (Downloading to a PC on

the go capability).

If your 844 has not been upgraded with the communication package, no change

is necessary from the default. If, however, your 844 has been upgraded with the

communications package, use the and keys to select the type of

communication you will be using. After selecting the communication you will be

using, depress the key to advance to the next step.

NOTE: If a communications feature is selected, you must exit the setup

mode, power down the console ( + ) then restart the console ( ).

This activates the selected communication feature.

WARNING:The 844 must be powered on before connecting to a

communication device (i.e. printer, computer, GPS).The 844 will not

completely power on if it is first connected to a communication device.

no cON

COMMUNI-

CATIONS

PROGRAM

SPECIFIC

GRAVITY

7.0 lbs. .84

8.0 lbs. .96

8.34 lbs.–Water 1.00

10.0 lbs. 1.20

10.65 lbs.–28%N 1.28

10.85 lbs.–30%N 1.30

11.0 lbs. 1.32

12.0 lbs. 1.44

14.0 lbs. 1.68

Weight of

Solution Per Gallon

Specific

Gravity

Note: Water weighs 8.34

lb/gal or 1 Kg/L

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Teejet 844 Sprayer Control User Manual Page 27

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