Exmark Z Turf Equipment Z-SPRAY Operator's Manual page 35

Note: Agitation is not meant to be used while
spraying. Shut off the agitation to ensure proper
spray pressure and distribution. There is some
agitation even with the agitation in the "OFF"
position.
6. Use the spray pressure control switch to adjust
the pressure. The red and white nozzles installed
on this machine have a normal operating pressure
of 40 psi (2.8 bar).
7. Using a container marked in ounces, catch the
output from each nozzle for 19.7 seconds. Write
down the number of ounces from each nozzle.
Note: Repeat the test three times and average
the nozzles separately.
8. Turn off the pump/tank agitation switch.
9. For example purposes, the amount collected is
shown below:
Nozzle Color and
Location
Red — Narrow Spray
Center Nozzle
White — Wide Spray
Right Nozzle
White — Wide Spray
Left Nozzle
10. Convert the fluid ounces collected for the right
white nozzle to gallons.
Note: 1 Gallon = 128 fluid ounces (fl oz)
33.5 fl oz
=
128 fl oz
11. To determine the current capacity of the right
white nozzle, convert .26 Gallons in 19.7 seconds
to gallons per minute (GPM):
.26 Gallons x 60 seconds
19.7 seconds
12. The following chart excerpt is provided with
permission from TeeJet
Amount Collected Per
Nozzle (in 19.7 seconds)
16.75 fl oz (.49 L)
33.5 fl oz (.99 L)
33.5 fl oz (.99 L)
.26 Gallon
.79 gpm
=
(3.0 L/min)
® Technologies. Use the
one below or reference the TeeJet
website to determine if the amount collected is
within +/–10% capacity of a new nozzle.
TeeJet ® Technologies New Nozzle Capacity
Information
Nozzle
Pressure
Color
10 psi
(0.7 Bar)
20 psi
(1.4 Bar)
30 psi
Red
(2.1 Bar)
40 psi
(2.8 Bar)
10 psi
(0.7 Bar)
20 psi
(1.4 Bar)
White
30 psi
(2.1 Bar)
40 psi
(2.8 Bar)
Note: The chart capacity information is based
on water being sprayed at 70
13. Perform steps 10 through 12 on each nozzle.
Note: If the collected nozzle spray does not
meet the charted amount, check the nozzles,
hoses, and fittings for leaks or damage; clean or
replace if needed.
Determining Application Rate
Use the example results of the calculated speed,
spray width, and nozzle capacity to determine the
application rate.
Note: The application rate may also be determined
®
by using the TeeJet
chart referenced above, along with the chemical
manufacturer's label of recommendation.
• Speed = 5.2 mph (8.4 kph)
35
Operation
® Technologies
Capacity–One Nozzle
0.20 gpm 26 0.76
oz/min L/min
0.28 gpm 36 1.06
oz/min L/min
0.35 gpm 45 1.32
oz/min L/min
0.40 gpm 51 1.51
oz/min L/min
0.40 gpm 51 1.51
oz/min L/min
0.57 gpm 73 2.16
oz/min L/min
0.69 gpm 88 2.61
oz/min L/min
0.80 gpm 102 3.03
oz/min L/min
° °
F (21 C).
Technologies excerpt