Spraying Systems Co TeeJet 844-E, Руководство пользователя

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844-E Sprayer Control
ChaptEr 6 - troUblEShooting gUidE
Condition Possible Cause Solution
1
. Application Rate Units (GPA, G/1000
ft
2
I/Ha) continually flash on/off
A.
Continuous discrepancy of 10% or
more between Target Application
Rate and Actual Application Rate
Check all components and programming steps related to flow
prograMMing
B. Flow meter pulses
In the System Setup mode, move to the Flow Meter Pulses section on page 14 of the
844 Installation Manual. Enter the factory calibrated flow meter pulse rate located on
the tag accompanying the flow meter.
C.
Nozzle Selection In the Application Setup mode, move to the Nozzle Selection section on page 29 of
the 844 Installation Manual. Enter the correct color or the flow rate in US GPM (l/min)
{Imp. GPM} of the tips you are using at 40 psi (2 bar). For new tips, this can be found
in your TeeJet® Catalog.
If the tips have been used and possibly worn, measure the flow in US Gallons Per
Minute (Liters Per Minute) {Imperial Gallons Per Minute) at 40 psi (2 bar) and enter
the value in the User Programmable tip programming step which can be found in the
System Setup Mode on page 14 of the 844 Installation Manual.
D. Number of spray tips per boom
section
In the System Setup mode, move to the Tips Per Boom Section step on page 15 of
the 844 Installation Manual. You must enter the correct number of spray tips for each
boom section on your sprayer. Five boom sections are possible. If you do not use all
boom section switches, make sure those not used are set to “0”. Make sure that the
switch numbers being used correspond with the section numbers programmed.
2 .
Application Rate Units continually
flash on/off
A.
Continuous discrepancy of 10% or
more between Target Application
Rate and Actual Application Rate
Check all components and programming steps related to flow
MEChaniCal
B.
Stalled meter pulses
Make sure there is no pressure in the system. Remove the flow meter from the
discharge line. Inspect the inside of the meter for obstructions. The turbine should
move freely. If it does not rotate easily, try flushing it out with clean water. If it remains
stuck, remove the turbine by releasing the retaining clip. Clean the turbine carefully
and make sure it rotates. Replace the turbine into the flow meter body and secure with
the retaining clip.
If you have a rapid check flow meter, remove the turbine from the flow meter body by
unthreading it at the sensor. Check the turbine for obstructions. Flush with clean water
or disassemble if necessary.
C. Plugged tips In the event of plugged nozzles, remove from boom and clean with water and a TeeJet
brush. Take care not to damage the orifice.
D. Wrong capacity tips All tips on the boom should be of the same style, spray angle and capacity (Flow
Rate). Replace any tips not matching those initially selected.
E.
Flow meter plumbed incorrectly A flow directional arrow is located on the body of the flow meter. Plumb the flow meter
with the arrow in the direction of the flow.
The flow meter must be mounted 10″ to 12″ (25-35 cm) from other pipe fittings. See
844 Installation Manual page 7.
Generally, the flow meter works better when mounted in a vertical position with the
flow being directed up.
F. Pump capacity too low Check the pump to make sure it is working correctly. Check the plumbing system for
any obstructions. Reduce Agitation Volume.
G.
Pump capacity too high Some centrifugal pumps provide more flow than necessary for the application. A
throttle valve is sometimes required to restrict the flow coming from a centrifugal pump.
Increasing bypass and agitation volumes can also help when flows are too high to
reach the target application.