RDS Technology Athene 100 Manuel utilisateur
1
Athene 100
Belt Spreader Monitor/
Variable Rate Controller
Calibration
Software Reference WZ812-000 rev.2
Electro-Magnetic Compatibility (EMC)
This product complies with Council Directive 89/336/EEC
when installed and used in accordance with the relevant
instructions.
Service and Technical Support
PLEASE CONTACT YOUR NEAREST DISTRIBUTOR
If unknown then fax: 44 (0) 1453 733322
© Copyright RDS Technology Ltd 2003
Document number
S/DC/500-10-377 : Issue 2 : 10/7/03
\UK377-2.DOC
User Guide
ATHENE 100 – SPREADER RATE CONTROLLER
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Contents
1Overview_________________________________________4
2Calibration on Installation _________________________5
2.1 Forward Speed Sensor Setup.......................................................................5
2.1.1 ‘Autocal’...........................................................................................5
2.1.2 Programme Cal Factor manually......................................................6
2.2 Belt/Gate Setup.............................................................................................7
2.2.1 Valve Autosetup Routine..................................................................7
2.2.2 Start up PWM...................................................................................7
2.2.3 Maximum Duty Cycle.......................................................................8
2.2.4 Minimum Duty Cycle........................................................................8
2.2.5 Response........................................................................................8
2.2.6 Deadband........................................................................................9
2.2.7 Millimetres of belt per pulse ..........................................................10
2.2.8 Setting "Monitor only" mode...........................................................10
2.2.9 Gate Width.....................................................................................11
2.2.10 Working Width...................................................................................11
3Product Calibration_____________________________ 13
3.1 Setting up for a given product/application rate ...........................................13
3.1.1 Set Density ....................................................................................13
3.1.2 Set Gate Height .............................................................................14
3.1.3 Set Application rate (Target rate)...................................................14
3.2 FAQ’s about Product Calibration.................................................................15
There is a small discrepancy in the amount applied....................................15
There is a big discrepancy in the amount applied. ......................................15
The instrument beeps continuously .............................................................15
3.3 Nudging the Product calibration..................................................................16
3.3.1 Under-application..........................................................................16
3.3.2 Over-application............................................................................16
3.3.3 Nudging the density ......................................................................17
3.3.4 Re-calculating a Density Factor.....................................................17
ATHENE 100 – SPREADER RATE CONTROLLER
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4Other Calibration Settings _______________________ 18
4.1 Hopper Setup...............................................................................................18
4.1.1 Level Sensor Configuration............................................................18
4.1.2 Alarm On-Off ..................................................................................19
4.1.3 Set Hopper Current Volume ...........................................................19
4.1.4 Reset Hopper Current Volume to Maximum Volume.......................20
4.1.5 Set Hopper Alarm Volume..............................................................20
4.1.6 Set Maximum Tank Volume............................................................20
4.2 RPM Sensor Setup.......................................................................................21
4.2.1 PPR - Shaft.....................................................................................21
4.2.2 Under-speed Alarm........................................................................22
4.3 Total Area.....................................................................................................22
4.4 Simulated Forward Speed ...........................................................................23
4.5 Units.............................................................................................................24
4.6 Percentage Step ..........................................................................................24
ATHENE 100 – SPREADER RATE CONTROLLER
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1Overview
There are two aspects of calibration :- Calibration procedures/system
settings made less frequently or only on installation, and the Product
calibration procedure as part of everyday operation. In addition to the normal
display / operating mode the instrument has 4 calibration modes.
On entering a Cal Mode the instrument defaults to the channel indicated by
the symbol. Table 1 shows the various Cal. modes and functions. Note
that the parameters required to ensure the correct application rate are
highlighted.
Cal Mode 1 Cal Mode 2 Cal Mode 3 Cal Mode 4
Press to
select channel,
then press and
hold
Press and
hold the
button, power on
and hold for 10
seconds
Press and
hold the
button and
power on
Press and
hold the
button and
power on.
Instrument must
be ‘out of work’
Channel
Selection As above Press Press Press
Channel 1 Speed Sensor
factor
(m/ 2 pulses)
[sect. 2.1]
Gate Width
(mm)
[sect. 2.2.9]
Simulated
forward speed
(km/h)
[sect. 4.4]
Response
(0.000 - 0255)
[sect. 2.2.5]
Channel 2
Working Width
(metres)
[sect. 2.2.10]
Total Area
(ha)
[sect. 4.3]
Units
(kg/ha or
tonnes/ha)
[sect. 4.5]
Start up PWM
(4.0 - 96.0%)
[sect. 2.2.2]
Channel 3 Hopper Alarm
Volume
[sect. 4.1.5]
Max Hopper
Volume
[sect. 4.1.6]
Percentage
Step (5, 10, 15,
20 or 25%)
[sect. 4.6]
Min Duty
Cycle
(4.0 - 96.0%)
[sect. 2.2.4]
Channel 4 Target
Application Rate
[sect. 3.1.3]
mm/Belt Pulse
[sect. 2.2.7]
Product
Density
(Kg/Litre)
[sect. 3.1.1]
Max Duty
Cycle
(4.0 - 96.0%)
[sect. 2.2.3]
Channel 5 Under-speed
alarm(rpm)
[sect. 4.2.2]
PPR Shaft
[sect. 4.2.1]
Gate Height
(mm)
[sect. 3.1.2]
Deadband
(0 - 100)
[sect. 2.2.6]
Channel 6 Tank
Contents/Alarm
on-off
[sect. 4.1.2]
Hopper Alarm
from
Volume/Sensor
[sect. 4.1.1]
NudgeDensity
[sect. 3.3.3]
Valve Auto
Setup Routine
[sect. 2.2.1]
Table 1
ATHENE 100 – SPREADER RATE CONTROLLER
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2Calibration on Installation
After installation, first proceed to calibrate the forward speed sensor and the
belt drive.
2.1 Forward Speed Sensor Setup
Cal Mode 1 – channel 1 Default = 1.000m (39.38 inches)
The instrument must be programmed with the correct Speed Sensor Factor
(S.S.F.). This is the distance travelled per two pulses received from the
sensor.
If a cal factor has previously been established for the vehicle, that factor can
be manually programmed. If the factor is not known then it can be calculated
automatically via the “Autocal” function as follows.
2.1.1 ‘Autocal’
1. Set two markers at 100 metres apart (328
feet). Choose a convenient reference point
on the vehicle and position this point
opposite the first marker.
2. Press and hold the button until the
cal factor is displayed
(Default = 1.000 m /2 pulses).
3. Continue holding the button,
and press the button until the display
shows "Auto’ ready for the Autocal.
4. Drive the vehicle until the chosen reference point is opposite the second
marker. The instrument counts and displays the sensor pulses received over
the distance traveled.
NOTE: If the count exceeds 9999 (as may occur if the forward speed signal comes
from a radar sensor), then the instrument displays the first 4 digits i.e "1001"
indicates between 10,010 and 10,019 pulses.
Figure 10: Start ‘Autocal’
2
3
ATHENE 100 – SPREADER RATE CONTROLLER
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5. Press the button again to complete the Autocal routine.
The calibration factor is automatically calculated and stored in memory.
2.1.2 Programme Cal Factor manually
Calculate as follows;
(i) If a conventional wheel sensor with two magnets is installed, the Speed
Sensor Factor is half the effective rolling circumference of the wheel. Drive
the vehicle forward in field conditions with the implement attached, for
exactly 5 revolutions of the sensed wheel. Measure the distance travelled
(metres) and divide by ten to find the Speed Sensor Factor.
(ii) If a prop shaft sensor with a single magnet is installed, the distance
traveled for two turns of the prop shaft must be determined. To determine
this distance, drive the vehicle forwards for exactly 10 revolutions of the prop
shaft. Measure this distance (metres) and divide by five, to find the Speed
Sensor Factor.
(iii)If an RDS Radar sensor is installed, set the factor to 0.0016 (m / 2 pulses).
1. Press and hold the button until the cal factor is displayed. Continue
holding this button and...
2. QUICKLY PRESS and RELEASE the button to select the digit or decimal
point to change, or...
3. HOLD the button to change the digit, or if selected move the decimal
point.
4. Release the button to return to the normal operating mode.
ATHENE 100 – SPREADER RATE CONTROLLER
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2.2 Belt/Gate Setup
2.2.1 Valve Autosetup Routine
Cal mode 4 - Channel 6 (ref. Table 1)
The valve auto-calibration routine establishes the startup PWM and maximum
duty cycle for controlling the belt speed.
1. Ensure the instrument is switched ‘out of work’ (is flashing) at the
bottom of the display and then turn the instrument off.
2. Press and hold the button and switch the instrument on to enter Cal
mode 4.
3. Press the button to select channel 6. The display shows "AUtO".
4. Press the button to select the auto-calibration routine and then switch
the system into work.
The display then alternates between "X" and "run" (Xbeing the PWM value
being sent to the valve) as it then establishes the Start up PWM and Max.
Duty Cycle PWM values as follows.
5. Once the routine is complete the PWM output will be turned off, the
instrument can be switch ‘out of work’ again and the Start Up PWM and Max
Duty Cycle PWM will be saved accordingly.
2.2.2 Start up PWM
Cal mode 4 - Channel 2 (ref. Table 1)
Default: 4% (Display shows 0004)
Auto-calibration first establishes the Start up PWM value. This is the PWM
output that enables a speed feedback signal to be received and from which
point closed loop control can continue.
The PWM output is slowly ramped up from 0% until the system registers a
slow but steady belt speed. The PWM value (typically around 20%) is then
stored to channel 2.
ATHENE 100 – SPREADER RATE CONTROLLER
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It should not normally be necessary to program this value as it will be
determined with an ‘Autocal’ (see section 2.2.1).
2.2.3 Maximum Duty Cycle
Cal mode 4 - Channel 4 (ref. Table 1) Range: 4 - 96%
Default: 96% (Display shows 0096)
After establishing the Start up PWM value, auto-calibration then establishes
the Maximum Duty Cycle PWM value. This is the PWM output at which the
belt is at maximum speed.
The PWM output continues ramping up until the belt speed no longer
increases. The PWM value is then stored to channel 4. When this is
completed the PWM output is switched off and the display shows "donE".
It should not normally be necessary to program this value as it will be
determined with an ‘Autocal’ (see section 2.2.1).
2.2.4 Minimum Duty Cycle
Cal mode 4 - Channel 3 (ref. Table 1) Range: 4 - 96%
Default: 4% (Display shows 0004)
This the percentage duty cycle at which the valve does not enable oil to
pass, and the hydraulic motor to rotate.
2.2.5 Response
Cal mode 4 - Channel 1 (ref. Table 1) Range: 0.000 - 0255
Default: 250 (Display shows 0250)
This factor affects how quickly the system will respond to a change in
application rate.
If it is set too high then the system will respond quickly but may overshoot
the target. This may result in the rate remaining unsettled and fluctuating
about the target rate.
ATHENE 100 – SPREADER RATE CONTROLLER
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If it is set too low, then the system will not respond quickly enough and the
system will take longer to reach the target rate.
1. Ensure the instrument is switched ‘out of work’ (is flashing) at the
bottom of the display and then turn the instrument off.
2. Press and hold the button and switch the instrument on to enter Cal
mode 4. On entry the instrument will automatically default to channel 1
showing the response factor programmed (default 0250).
3. QUICKLY PRESS and RELEASE the button to select the digit or
decimal point to change, or...
4. HOLD the button to change the digit and release when the required
number is shown.
NOTE: It is possible to program a number greater than 0255 but when the instrument
is turned OFF it will not be saved. Therefore ensure the number set does not
exceed the maximum of 0255.
2.2.6 Deadband
Cal mode 4 - Channel 5 (ref. Table 1) Range: 0 - 100
Default: 10 (Display shows 0010)
This setting sets a 'tolerance band' about the target rate. The control system
will only adjust when the calculated application rate is outside of this band.
The lower the factor, the more accurate the system will be in trying to achieve
the target. If you find that the system is constantly 'hunting' to meet the
target then you should increase the factor.
ATHENE 100 – SPREADER RATE CONTROLLER
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2.2.7 Millimetres of belt per pulse
Cal mode 2 - Channel 4 (ref. Table 1) Range: 0.000 - 99.99
Default: 30.00 mm (Display shows 30.00)
This is the length the belt moves for every pulse from the belt drive encoder.
It will need to be calculated mathematically for each different type of
machine, and must take account of the overall gear reduction ratio between
the encoder shaft and the belt drive roller.
1. To enter cal mode 2, press and hold the button, power on and then
hold for 10 seconds.
2. Press the button to select channel 4.
3. Quickly PRESS and RELEASE the button to select the digit or decimal
point to change, or...
4. HOLD the button to change the digit and release when the required
digit is shown.
NOTE: It is possible to program a number greater than 99.99 (by moving the decimal
point) but if the factor required is greater than this suggested maximum we
would advise that the device used to provide the speed signal (encoder or
sensor) is relocated to provide a greater number of pulses. Having an
installation requiring a factor greater than 99.99 will not enable the control
system to work correctly.
2.2.8 Setting "Monitor only" mode
Cal mode 2 - Channel 4 (ref. Table 1) Range: 0 - 99.99
Default: 30.00 mm (Display shows 30.00)
1. To enter cal mode 2, press and hold the button, power on and then
hold for 10 seconds.
2. Press the button to select channel 4.
3. QUICKLY PRESS and RELEASE the button to select the digit or decimal
point to change, and...
Autres manuels pour Athene 100
1
Table des matières
Autres manuels RDS Technology Contrôleurs
