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5477Y1 Sentinel Row Control Manual
©2022 SurePoint Ag Systems 48
4/29/2022
Sentinel HOME Screen for Row Control
--
Setup and Diagnostic Tabs
Setup
values are shown for typical
PR hydraulic
pump
system. These can be adjusted as necessary for best op-
eration.
Setup
values are shown for electric pump system (usually
not used on Row Control systems). These can be adjusted
as necessary for best operation.
Diagnostic
is a screen that can be seen while operating in
the field or while testing. The important system parameters
can be seen here.
Check the
Diagnostic
screen regularly so you have an
idea what
“
normal
”
operating numbers are. This can help
when you need to troubleshoot an issue.
Diagnostic Tip:
Note the relationship between Duty Cycle
(%), Pressure, Flow (GPM), and RPM (hydraulic pump). If
Duty Cycle and RPM increase above what Is normal for a
given flow, there could be a restriction on the inlet side of
the pump. This could be a plugged strainer or a strainer
that gets gelled over, especially with cold fertilizer.
Increased Duty Cycle with no increase in RPM could mean
the pump is not getting enough hydraulic flow to spin the
pump faster.
Diagnostic:
(PWM)
Duty Cycle
shows the PWM signal sent from the controller to control the pump. On a hydrau-
lic system, this needs to be around 25% before the pump will run. 40%
-
50% is a typical operating range. On a
normal pass this should be fairly stable (± 2%). The Duty Cycle will adjust for speed, rate changes or width chang-
es (sections going on and off).
Actual Flow
shows the GPA being applied based on the Speed and the Machine Width.
Flow
is the GPM measured by the flowmeter.
Flow Freq
shows the number of pulses per second (hz) being received from the flowmeter. This should be fairly
stable (± 2). When diagnosing flowmeter issues, watch this number during a tap test to see if the signal gets from
the flowmeter harness connector to the display.
RPM
shows the pump RPM on a hydraulic pump equipped with an RPM sensor. This should be less than 500.
Can be set at 550 if maximum pump output is required.
RPM Freq
shows the signals received from the RPM sen-
sor. This can also be used during a tap test on the Pump RPM harness connector.
Watch these values regularly during operation so you know what
“
normal
”
looks like. For example, a plugged
strainer could mean the pump has to run faster than normal to get enough product. This will show up in an in-
creased Duty Cycle and RPM.
Working Width
will change as sections turn on and off. It should show the application width at any time.
Ctrl Speed:
Decrease if pump (PWM Duty Cycle) surges
or oscillates back and forth above and below the rate. In-
crease if pump is slow to adjust.
RPM
15
Start Boost
-
0
(pump starts where it stopped) or set in
field (enter PWM DC % for startup speed)
Flow Cal
for big electromagnetic flowmeter.
Decrease
PWM Min
if pump will not slow down enough for
low speed/rate/width.
2000
0.00
0.00
20
-
30
500
SurePoint
Ag
Systems