micromax manual rev 4

micromax manual rev  4
Instruction manual
Bromyard Industrial Estate, Bromyard,
Herefordshire, HR7 4HS, UK
Tel: + 44 (0) 1885 482397
Fax: + 44 (0) 1885 483043
E-mail: [email protected]
URL: http://www.micron.co.uk
MICROMAX
CONTENTS
CONTENTS
This manual contains all the information required to ensure successful
and safe application of agrochemicals using sprayers fitted with one or
more MICROMAX atomisers. It should be treated as an integral part of
the machine and made easily available to the spray operator for
reference, as required, during the spraying operation.
Full instructions for the efficient, effective and safe operation of
MICROMAX atomisers are included in this volume, along with all
necessary information for installation, maintenance and repair.
Reference may also be required to the spray vehicle and/or base
SECTION
1
2
3
4
5
6
7
8
9
10
11
12
PAGE
Description ............................................................................................4
Specification .........................................................................................5
Ten key points for users ...................................................................6
Safety and the environment ...........................................................7
Installation .............................................................................................8
Basics of Controlled Droplet Application (CDA).................. 24
Calibration and adjustment ......................................................... 36
Operation............................................................................................ 50
Maintenance ...................................................................................... 57
Trouble shooting ............................................................................. 61
Parts list and diagram .................................................................... 62
Notes on units and useful conversions................................... 64
THE SPECIFICATIONS QUOTED ARE CORRECT AT THE TIME OF GOING TO PRINT. THE
RIGHT IS RESERVED TO VARY SPECIFICATIONS WITHOUT NOTICE.
DUE CARE HAS BEEN TAKEN IN THE PREPARATION OF THIS MANUAL. NO LIABILITY,
ABOVE THAT REQUIRED BY APPLICABLE LAWS, WILL BE ACCEPTED FOR INJURY, LOSS
OR DAMAGE DUE TO OMISSIONS OR MISTAKES.
REPRODUCTION OF THIS MANUAL, IN PART OR IN WHOLE, IS ONLY PERMITTED WITH
PRIOR WRITTEN CONSENT.
© MICRON SPRAYERS LIMITED 2002 – ALL RIGHTS RESERVED
3
1 – DESCRIPTION
MICROMAX
1 – DESCRIPTION
ROTARY ATOMISER FOR VEHICLE MOUNTED SPRAYING
The vehicle-mounted MICROMAX is a spinning disc rotary atomiser
designed for the Controlled Droplet Application (see section 6 ‘Basics
of Controlled Droplet Application’) of most agrochemicals. By
efficiently producing only the spray droplet sizes appropriate for the
particular application the MICROMAX cuts spray volumes and costs
and minimises any risk of environmental contamination.
The unique design of the electrically driven MICROMAX ensures
controlled spray atomisation over a wide range of liquid feed rates and
gives a choice of three disc rotational speeds, and thus spray droplet
sizes, to suit different applications:
• 200 μm to 500 μm spray droplets for pre-emergent and postemergent herbicide applications where drift avoidance is essential.
• 100 μm to 300 μm spray droplets for most post-emergent
herbicides, defoliants, foliar feeds and fungicides to ensure good
coverage of plant surfaces while minimising any risk of uncontrolled
spray drift.
75μm to 150μm spray droplets for insecticides and fungicides.
The MICROMAX is designed primarily for use in agriculture, the
materials used in its construction will withstand all standard products
used for conventional agricultural spraying. The MICROMAX can be
used with both water and oil based sprays, but is not designed for use
with liquid fertilisers or unusually aggressive, dense, or viscous
products.
The low application volumes allowed by the MICROMAX mean greater
areas can be sprayed per tank load (or lighter vehicles used), with
dramatic savings in the cost, time and effort of the spraying operation.
This both speeds up the spraying process and allows more spraying
days, thus allowing quick and cost-effective pesticide application to be
undertaken when needed.
•
4
MICROMAX
2 – SPECIFICATION
2 – SPECIFICATION
Height
Disc
Diameter
Weight
Power
Supply
Current
Drawn
Power
Used
MOUNTING
BRACKET
MOTOR
BELT AND
PULLEY DRIVE
230 mm
(9 inches)
125 mm
(5 inches)
1 kg
(2.2 pounds)
12 v DC
3A max
36W max
LIQUID FEED
NOZZLES
ATOMISER
DISC
Figure 1 – MICROMAX Spray Head
Feed Rate
Low
0.5 - 3 l/min
Speed Setting
Medium
0.25 - 1 l/min
High
0.125 - 0.5 l/min
Disc Speed 2000 rpm
3500 rpm
5000 rpm
Application 30 - 200 l/ha
20 - 80 l/ha
10 - 40 l/ha
Volume
Droplet Size 200 - 500 μm
100 - 300 μm
75 – 150 μm
Table A – Typical Performance Data
5
3 – TEN KEY POINTS FOR USERS
MICROMAX
3 – TEN KEY POINTS FOR USERS
The following list is intended to be referred to prior to commencing
each spraying operation, to remind users of the key points for the safe
and efficient use of the MICROMAX atomiser.
1
2
3
4
5
6
7
8
9
SAFETY: Always refer to the product label for specific
recommendations for each product, and to Section 4 ‘Safety and
Environmental Considerations’ before commencing any spraying
operation.
Check that all atomisers rotate freely. If binding or roughness is
felt, inspect the motor, belt drive and disc bearings.
Check that the pulleys and belts are clean and free from damage
and that the appropriate gear is selected, see Section 7
’Calibration and Adjustment’.
Check that the atomiser discs are secure and free from damage
or blockage by dried chemical.
Ensure that the atomisers are securely and correctly positioned
on the boom or support structure, and are set to the correct
distance from the crop/target to be sprayed, see Section 5
‘Installation’.
Inspect the entire sprayer for damaged or twisted hoses, leaks in
the chemical system, or damaged wires.
Check that the correct nozzles and flow restrictor orifices are
fitted, and that the correct system pressure is set to provide the
required liquid feed rate, see Section 7 ‘Calibration and
Adjustment’.
Turn the atomiser motors on, to ensure they are rotating and at
the correct speed, see Section 7 ‘ Calibration and Adjustment’.
Whilst spraying, visually ensure that each atomiser is working,
and verify the accuracy of the calibration of the sprayer by
checking the volume of liquid used against the area being
sprayed.
6
MICROMAX
4 – SAFETY AND THE ENVIRONMENT
4 – SAFETY AND THE ENVIRONMENT
Using agrochemicals is a hazardous process. Operators should be
familiar, and comply, with all relevant legislation and/or regulations.
Keep people and animals out of areas being sprayed. Observe all
regulations on spraying near inhabited or public areas and waterways.
Never use MICROMAXs in potentially explosive atmospheres, or spray
flammable liquids, mixtures of incompatible chemicals, suspended
insoluble particles, or anything other than agrochemicals through
them.
Always read the product label carefully to discover:
• recommended application rate and dilution
• operator protection required
• necessary environmental protection measures
• action required in case of accidental spill, ingestion, skin or eye
contact
Never eat, drink, or smoke when working with agrochemicals.
Always store agrochemicals safely to protect people and animals, and
to safeguard the environment. Wash and rinse chemical product
containers well using proper equipment. Make a hole in the bottom of
empty containers to prevent re-use. Dispose of containers, unused
agrochemicals, and washing residues in accordance with regulations.
4.1 OPERATOR PROTECTION
Always wear the protective clothing items listed on the product label
for mixing and filling. After using agrochemicals or handling
equipment always wash your hands and clothes thoroughly.
The minimum protective
clothing required for spraying
with the MICROMAX from an
uncabbed vehicle, or of
cleaning contaminated atomisers and sprayers is:
7
5 – INSTALLATION
MICROMAX
5 – INSTALLATION
The design of a sprayer incorporating one or more MICROMAX
atomisers will vary according to the crop or target to be sprayed.
This section gives general advice and design data but is not intended
to provide specific instructions for building every type of sprayer.
Original Equipment Manufacturers (OEMs) should contact Micron if
!
•
•
•
•
IMPORTANT SAFETY RECOMMENDATIONS
The design of agricultural equipment is best done by a
qualified and competent engineer. All relevant legislation
and regulations should be adhered to.
Agricultural equipment should only be worked on by suitably
trained personnel. Manufacture and assembly work should
be completed by trained and competent technicians.
Ensure that all welds are sound, and that all fasteners used
are correctly tightened.
Use the correct tools for the job to avoid injury or damage.
5.1 MOUNTING THE MICROMAX
Figure 2 – A boom sprayer for field crops
8
MICROMAX
5 – INSTALLATION
Figure 3 – A boom sprayer for orchard floors
Figure 4 – An ATV sprayer for orchard floors, grassland, etc.
5.1.2 Strength and rigidity
Support arms or frameworks should be of strong and rigid
construction.
Spray booms should also be rigid, and preferably provided with
suspension. If the boom is lightweight in construction, it is advisable to
reinforce and stabilise it.
Excessive bouncing will cause uneven spray output from the
MICROMAX. Brace bars, nylon support ropes and springs are common
methods of reducing boom bounce.
5.1.3 Folding booms
If mounting MICROMAX atomisers on a folding boom, it is essential to
ensure that the atomisers are positioned such that they do not
9
5 – INSTALLATION
MICROMAX
5.1.4 Spray pattern clearance
The MICROMAX produces a large hollow cone spray pattern, varying in
diameter with different atomiser speeds/droplet sizes. Support arms or
frameworks should be designed to allow a radial clearance of 1.2m (4
feet) to prevent spray pattern disruption.
1.2m (4 feet)
CLEARANCE RADIUS
Figure 5 – Spray pattern clearance
If mounting MICROMAXs on a spray boom, one or more extension
arms may be required to provide the necessary clearance from the
sprayer, support wheels, or other obstructions. These arms can be
constructed from heavy gauge 40 mm (1.5 inch) or larger angle iron,
channel, tube or box section. They should be constructed and
mounted so as to be as rigid as practicable, to minimise bounce.
SPRAY PATTERN
MICROMAX
BOOM
EXTENSION ARMS
Figure 6 – Sprayer clearance
10
MICROMAX
5 – INSTALLATION
TYPICAL STEEL BOX
SECTION BOOM
CLAMPS
EXTENSION ARM
Figure 7 – Extension arm
5.1.5 Distance from crop or target
A height of 0.5m (20
inches) above the top of
the crop canopy or target
is
recommended
(measured from the
atomiser disc’s lowermost
teeth). This can be lowered
DIRECTION OF
0.5m (20 inches)
Figure 8 – Distance above target
5.1.6 Boom end supports
If using a boom sprayer, it is advisable to fit boom tip wheels or skids
to protect the end MICROMAX atomisers from contact with the
ground.
11
5 – INSTALLATION
MICROMAX
5.1.7 Spacing of multiple atomisers
The most ideal spacing between MICROMAX atomisers, for multipurpose use, is 1m (40 inches).
At the lowest atomiser speed a wider spacing is possible and has been
successfully used. Overlap of spray pattern can be expected up to 2m
(80 inches) under calm conditions e.g. for spraying orchard floors.
1m (20 inches)
1m (20 inches)
SPRAY PATTERN
CENTRED ON
ATOMISER
PATTERN OVERLAP
Figure 9 – Spacing between atomisers
5.1.8 Angle of atomisers
The MICROMAX is mounted utilising the
integral vertical ‘bolt plate’ and suitable bolts.
A secondary bracket is available separately
giving a 15˚ angle for post-emergent crop
spraying.
It is recommended that the MICROMAX is
fitted vertically for applying pre-emergent/pre
-plant herbicides. This is also strongly
recommended for spraying herbicides in
orchards (to reduce the possibility of chemical
injury to trees).
An angle of 15˚ is recommended as a good
general purpose position for most postemergent herbicide, insecticide, fungicide,
12
DIRECTION OF
VERTICAL
15˚
Figure 10 –
Mounting angle
MICROMAX
5 – INSTALLATION
5.2 LIQUID FEED SYSTEM
The design of the liquid feed system will depend on the number of
MICROMAX atomisers to be used, the design of the sprayer, and
whether the sprayer is newly built or a modified older sprayer.
Many of the components for the liquid feed system are available direct
from Micron, otherwise contact your usual sprayer component
supplier.
5.2.1 Flow regulation
The flow of spray liquid to each MICROMAX atomiser must be
regulated to give the correct total output from the sprayer and
consequently the required volume application rate on the crop or
target. See Section 7 ‘Calibration and adjustment’ for volume
application rate calculations.
The liquid feed rate is regulated by the MICROMAX’s coloured nozzles,
or a combination of nozzles and either a fixed restrictor or a Variable
Restrictor Unit (VRU) in the feed pipe to each atomiser. The most
common configuration is to use the coloured nozzles and a fixed
‘orifice plate holder’ unit. The restrictor unit should be placed in the
spray line just before the MICROMAX atomiser, after any filters and the
Diaphragm Check Valve (DCV). See Figure 11 ‘Typical spray liquid feed
system’ on page 14.
The appropriate nozzles and VRU setting or orifice plate that give a
feed rate, at the nominal system pressure, nearest to that required for
the application are selected. Fine adjustment of feed rate is then
achieved by varying spray line pressure. See Section 7 ‘Calibration and
adjustment’ for details on using system pressure and nozzle and orifice
selection to set the required volume application rate.
Unlike hydraulic nozzles, MICROMAX atomisers do not require
pressure to operate and droplet size is unaffected by the system
pressure. The pressure is therefore only selected to give the correct
liquid flow.
5.2.2 Diaphragm Check Valves (DCVs)
It is strongly recommended that a suitable Diaphragm Check Valve
13
5 – INSTALLATION
MICROMAX
5.2.3 Filtration
A filter must be incorporated in the spray liquid supply. This should
have a 0.5 mm (50 mesh/inch) or finer mesh filter.
The filter may be installed either in the suction or pressure line of the
pump, but the filter must always be before any flow restrictors and
should preferably be before the pressure regulator. It is most common
to fit the filter to the suction line of the pump to protect the pump
itself (see Figure 11 ‘Typical spray liquid feed system’ on page 14).
Secondary filtration is strongly recommended to catch any smaller
particles missed by the main filter, as well as any particles that may
already be present in the spray lines, or rust particles etc.
Secondary filters (i.e. nozzle filters) should be fitted just before the DCV
and flow restrictor for each MICROMAX atomiser. A finer mesh 0.25
mm (100 mesh/inch) filter is recommended.
The main purpose of filtration in a MICROMAX system is to protect the
pump and valves, and to prevent partial or total blockage of the flow
restrictors. The MICROMAX is itself very difficult to block, due to the
nature of the rotary disc atomiser.
5.2.4 Pumps
If a new sprayer is being designed or an original pump is to be
replaced, it is recommended that a diaphragm or centrifugal type is
chosen. This should be able to provide a pressure of about 3 bar (45
psi), and should be capable of delivering the maximum flow rate
required of the sprayer plus the flow required for tank agitation (if a
mechanical agitator is not used).
Each MICROMAX atomiser takes a maximum of 3 l/min (6.5 US pt/min).
Consult the specifications of your base sprayer (or tank manufacturer)
for the required flow for tank agitation.
5.2.5 Materials
All liquid feed system components should be rated for the system
pressure to be used, and manufactured from materials that will not be
degraded by weathering or agrochemicals. It is best to source
14
MICROMAX
5 – INSTALLATION
5.2.6 On/Off valve
An on/off valve must be fitted in the main liquid feed to the
MICROMAX atomiser/s (see Figure 11 ‘Typical spray liquid feed system’
on page 14). This may be mechanically or solenoid operated, but
should be positioned so as to be easily and safely actuated by the
sprayer operator whilst driving the sprayer.
Several on/off valves plumbed in parallel, or a multi-position valve, can
be used to select different groups of MICROMAX atomisers if required
(for example for multiple boom sections).
5.2.7 Pipe and hose sizes
The bore size of the components and the pipes or hoses required will
depend on the number of MICROMAX atomisers connected to the
system, and therefore the maximum flow required at the operating
pressure. The use of rigid pipe or flexible hose is purely at the
designer’s discretion.
For pump connection, the pump manufacturer’s guidelines should be
followed. However, 20 mm (0.75 inch) bore hose on the suction side
and 13 mm (0.5 inch) bore hose on the pressure side are
recommended as a minimum for one atomiser systems. For systems
with multiple atomisers, hose bore sizes up to 40 mm (1.5 inch) on the
pump’s suction side and 32 mm (1.25 inch) on the pressure side may
be required.
All hoses, pipes, and components upstream of the pump should be the
same bore size as the pump’s suction side hose.
All hoses, pipes, and components downstream of the pump, up to the
on/off valve (or valves), should be the same bore size as the pump’s
pressure side hose (including the bypass return line).
If only one MICROMAX is connected to the on/off valve, it is
recommended that 13 mm (0.5 inch) bore hose or pipe is used to
connect up to the nozzle filter. The bore size should then be reduced
to 6mm (0.25 inch) for the remaining downstream components and
connections.
For systems where more than one MICROMAX is connected to the on/
off valve, it is recommended that the pump pressure side hose bore
15
5 – INSTALLATION
MICROMAX
AGITATOR
SPRAY LIQUID TANK
ON/OFF VALVES FOR
MULTIPLE SECTIONS
FLUSH
TANK
SUCTION
FILTER
(a)
SERVICE
VALVE
(b)
PUMP
(c)
REGULATOR
VALVE
MULTIPLE MICROMAXs IN A SECTION
N
RU
TE
R
SS
AP
YB
(d)
(a)
-
)
h
(
(i)
ER
US
SE
RP
EG
UA
G
FF
O
/
N
O
)
e
(
EV
LA
V
EL
ZZ
O
N
)
f
(
RE
TL VC
IF D
)
g
(
R
O
TC
I
W RTS
O
LF ER
NOTES:
a
b
c
d
e
f
g
h
i
0.5 mm (50 MESH/INCH) MESH FILTER
3 WAY LEVER OPERATED ISOLATING / CHANGEOVER VALVE
DIAPHRAGM OR CENTRIFUGAL PUMP
3 BAR (45 PSI) OUTPUT AT REQUIRED FLOW RATE
ADJUSTABLE SINGLE STAGE PRESSURE REDUCING VALVE
12v DC SOLENOID OPERATED TWO POSITION ON/OFF VALVE
POWER SUPPLIED BY SPRAYER’S ELECTRICAL SYSTEM
OPERATED BY SWITCH IN SPRAYER’S CAB OR NEAR TO DRIVER
0.25 mm (100 MESH/INCH) MESH IN-LINE FILTER
LOW PRESSURE DIAPHRAGM CHECK VALVE (DCV)
ORIFICE PLATE HOLDER TYPE FIXED FLOW RESTRICTOR UNIT
6mm (0.25 INCH) BORE HOSE CONNECTION
SPLIT USING 6mm (0.25 INCH) BARB ‘Y’ PIECE
Figure 11 – Typical spray liquid feed system
16
G
N
IT
CE
N
N
O
C
XA
M
O
RC
I
M
MICROMAX
5 – INSTALLATION
5.2.8 Flow indicators
It may be desirable to fit flow indicators in the feed lines to each
MICROMAX atomiser. The flow indicators should be positioned so as
to be clearly visible to the spray operator whilst driving the sprayer,
without the operator needing to take their eyes off the direction of
travel for more than a few seconds. Larger numbers of MICROMAX
atomisers may be monitored in groups (such as boom sections) in
order to reduce the number of indicators required and the complexity
of the plumbing.
!
•
•
•
IMPORTANT SAFETY RECOMMENDATIONS
Before working on an existing liquid feed system, always
flush out the entire system with clean water or a suitable
solvent and wash off outer surfaces.
When working on a sprayer that has been used with
agrochemicals, always treat it as contaminated, even if it has
been thoroughly flushed and cleaned. Refer to Section 4
‘Safety and the environment’ for recommended precautions.
Legislation and regulations on the design of sprayers have
changed significantly over the last few decades. Older
sprayers should be upgraded to meet the latest requirements.
If an older sprayer is being modified, it is essential that the spray liquid
feed system is thoroughly cleaned and overhauled. Any rusty or
damaged pipes or hoses should be replaced, valves should be checked
for correct operation, the pump should be serviced, and the filters
cleaned or replaced.
The original spray pump can normally be retained. If this pump is a
high pressure type or if it has excess capacity, it may be necessary to fit
an adjustable pressure regulator in the liquid supply line to the
atomisers. If a pressure regulator is already fitted but cannot be
adjusted to a sufficiently low pressure, it will be necessary to either fit a
second low pressure regulator to the output of the main regulator, or
17
5 – INSTALLATION
MICROMAX
When retro-fitting multiple MICROMAX atomisers to a boom sprayer it
is common to utilise most of the existing spray system. MICROMAXs
are generally plumbed to every other existing nozzle holder, the
holders in between being blanked off, if nozzles are spaced at 0.5m (10
inches).
The usual arrangement is to fit a suitable DCV unit and nozzle filter into
the nozzle holder. A nozzle cap, usually one for disc and core type
hollow cone nozzles, is then fitted with a 6 mm (0.25 inch) hose barb
adapter. This is fitted to the DCV unit in place of the conventional
nozzle and cap, allowing connection of 6 mm (0.25 inch) bore hose.
The MICROMAX plumbing is then continued as per Figure 11 ‘Typical
spray liquid feed system’ on page 14.
Some DCV units allow an orifice plate to be fitted before the nozzle
cap and hose barb, otherwise a separate orifice plate holder should be
fitted in the line to the atomiser, before the split to feed the two
nozzles.
The components required for attaching to most common nozzle
holders can be obtained from Micron, otherwise contact your usual
spray component supplier.
5.3 ELECTRICAL SYSTEM
!
•
•
IMPORTANT SAFETY RECOMMENDATIONS
Failure to follow the recommendations in this section, and
good electrical wiring practice, may lead to serious damage
to the MICROMAX’s motor. Unsafe conditions may also
arise, such as; excessive heating of components, risk of fire,
and damage to the spray vehicle’s safety critical systems.
It is strongly recommended that the electrical system be
designed and installed by a qualified and competent
electrician with reference to the vehicle manufacturer’s
18
MICROMAX
5 – INSTALLATION
All components needed to build the electrical system should be
available from your usual specialist electrical component supplier,
otherwise contact Micron for advice.
5.3.1 Motor rating
The MICROMAX is driven by a permanent magnet DC motor.
6000 rpm (achieved at approximately 14v DC) and 3A are the
maximum recommended speed and current ratings.
5.3.2 Voltage vs. speed, current vs. flow
The MICROMAX motor’s rotational speed is almost directly
proportional to the voltage applied across it. Correct disc speed is
essential to ensure appropriate spray quality (see section 6 – ‘Basics of
Controlled Droplet Application’). It is essential to ensure, therefore,
that the voltage across the motor is as near to 12v DC as is practicable
(max. +/- 1v DC).
The current drawn by the MICROMAX’s motor will increase as the flow
rate of chemical liquid is increased. Higher flow rates than the
maximums quoted in Table A ‘Typical Performance Data’ on Page 3
should not be used. This risks overloading and damaging the
MICROMAX’s motor, and will also cause a deterioration in the droplet
size spectrum.
5.3.3 Switch Box
A master on/off switch and ‘power on’ indicator should be fitted in
order to be able to turn the MICROMAX atomiser/s on and off as
required. The switch should be large and easily operated with a gloved
hand, yet difficult to accidentally actuate (i.e. when driving the sprayer).
The indicator should be bright enough to be visible in all daylight
conditions.
If more than one atomiser is to be controlled high power components
should be used, since each MICROMAX can use up to 36 watts and
draw up to 3A. It is common for multi-atomiser systems, such as boom
sprayers, to use a high power relay to effect switching, with the actual
19
5 – INSTALLATION
MICROMAX
5.3.4 Location of the switch box
The switch box should be securely mounted, and located so as to
minimise the length of the battery leads and the MICROMAX power
cables. Care should be taken to position the switch box so that it
causes no impediment to the safe operation of the sprayer.
It is desirable that the sprayer operator, whilst in the driving position,
should be able to comfortably and safely operate the switch. This is
not, however, essential if it is impractical. The spray liquid on/off valves
are the primary method of turning the sprayer on and off whilst in
operation (i.e. when turning at the end of rows).
5.3.5 Power supply
In most instances the MICROMAX’s electrical system will be connected
to the spray vehicle’s system, powered by the alternator. It is
recommended that connection is made directly to the vehicle’s battery
terminals (see Figure 12 ‘Typical electrical system’ on page 21).
It is essential to check the spray vehicle manufacturer’s specifications to
ensure that the alternator has sufficient spare capacity to drive the
required number of MICROMAXs. If not, a larger alternator or
dedicated electrical supply must be fitted.
A dedicated electrical supply may be preferred or needed, such as a
PTO shaft driven generator. In this case it is recommended that the
dedicated supply be used to charge a large capacity heavy duty
battery. The MICROMAX electrical system should then be connected
to the battery, which will act as a buffer or accumulator to smooth the
supply.
5.3.6 Fuses and circuit protection
The vehicle’s electrical system should be protected by fitting a master
fuse into the positive battery lead. This should be located as near as
possible to the battery terminal connection (see Figure 12 ‘Typical
electrical system’ on page 21).
The master fuse should be a ‘slow blow’ automotive type. Some
experimentation may be required to obtain the best balance between
20
MICROMAX
5 – INSTALLATION
The MICROMAX motor and supply circuits should also be protected.
Fit a ‘slow blow’ type 5A fuse in the positive power lead to each
MICROMAX. The fuse should be located as near as possible to the
atomiser itself (see Figure 12 ‘Typical electrical system’ on page 21). It
is recommended that a weatherproof fuse holder is used, otherwise
wrap the fuse holder in weatherproof tape.
5.3.7 Battery connection
The power leads from the battery to the switch box should be
Number of
MICROMAXs
Cross Sectional Area (CSA)
(each lead)
1
2 to 6
7 to 12
4 mm2 (12 AWG)
6 mm2 (10 AWG)
10 mm2 (8 AWG)
Table B – Battery lead size
The positive and negative leads should be twisted around each other
along as much of their length as possible, to reduce impedance.
The connections to the battery must be secure and offer low resistance.
High quality, heavy duty 8 mm (0.3125 inch) crimp rings are
recommended, they will fit the terminal bolts used on most batteries.
5.3.8 MICROMAX connection
The leads from the switch box to each MICROMAX should be oversized
to minimise voltage drop. Guide sizes are given in Table C ‘Micromax
feed cable sizes’ on Page 20.
If more than one MICROMAX atomiser is to be connected, they should
always be connected in parallel (see Figure 12 ‘Typical electrical system’
on page 21). The lengths of the leads from the switch box to each
atomiser should be kept as equal as practicable.
21
5 – INSTALLATION
Configuration
MICROMAX
Area (CSA) each lead
Single atomiser
cable less than 3m (10 feet) long
Single atomiser
cable more than 3m (10 feet) long
Cross Sectional
1.5 mm2 (16 AWG)
2.5 mm2 (14 AWG)
Up to 12 atomisers fed from a single master power
cable split at a junction box (i.e. on a boom sprayer).
•
Master cable (max. 3m (10 feet) long)
6 mm2 (10 AWG)
Table C – MICROMAX feed cable sizes
Connection to the MICROMAX’s motor leads should be made in such a
way as to facilitate quick and easy replacement of the atomiser.
Waterproof automotive type in-line plug/socket connectors are
recommended. Screw terminal blocks wrapped in weatherproof tape
are an acceptable low cost alternative.
Any junction boxes used should be securely mounted and be
weatherproof. Glands should be used on all cable entries.
5.3.9 Materials and cable type
For most applications, all leads/cables can be PVC insulated multistranded flexible copper cable. Arctic grade PVC or CSP insulated
cable may be required in unusually harsh environments.
It is strongly recommended that all leads/cables are protected using
flexible polypropylene or nylon conduit, braided polyethylene sheath,
or similar. This is especially important in areas where abrasion is likely,
such as around folding boom pivot points.
Connections should be sealed with glands or weatherproof tape.
Exposed components should be weatherproof and resistant to
agrochemicals.
22
MICROMAX
5 – INSTALLATION
SWITCH BOX
MICROMAX
(b)
FUSE
(e)
1
0
FUSE
(d)
EG
RA
H
CE
R
12 VDC
BATTERY
(a)
-
(a)
MULTIPLE HEADS IN PARALLEL
(e)
NOTES:
a
b
c
d
HEAVY DUTY 12 VOLT DC BATTERY
SWITCH BOX GIVING ON/OFF CONTROL
USUALLY VEHICLE’S ALTERNATOR CIRCUIT
SLOW BLOW AUTOMOTIVE TYPE (SEE SECTION 5.3.6)
e
Figure 12 – Typical electrical system
5.3.10 Routing leads/cables
Leads/cables should be securely clipped in place and routed to avoid
hot areas or possible pinching hazards. Care should be taken to ensure
that no impediment is caused to the safe operation of the sprayer.
23
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
MICROMAX
6 – BASICS OF CONTROLLED DROPLET APPLICATION
(CDA)
This section is included as a brief introduction for spray operators new
to Micron's MICROMAX CDA technology. It is not intended to be a
comprehensive spraying guide, or to offer detailed recommendations.
Please contact Micron for application specific advice.
6.1 WHAT IS CDA?
An agricultural sprayer may be used to treat many different targets,
varying from the bare ground to an insect on top of foliage. For each
application there is an optimum droplet size for maximum efficiency.
Ideally all spray liquid would leave the sprayer in optimum sized
droplets. In reality this is impossible, all sprayers produce a range of
droplet sizes.
The control of the size and range of droplets produced and applied is
called Controlled Droplet Application (CDA). What defines a CDA
sprayer is its ability to produce relatively even droplets, correctly sized
to suit the application.
6.2 DROPLET FORMATION
Figure 13 – Conventional hydraulic pressure nozzle droplet
formation by sheet disintegration.
24
MICROMAX
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
The droplets formed can vary considerably in size, typically ranging
from 1μm to 1000μm. Droplets that are too big bounce off the target
or run together and drip, whilst droplets that are too small drift away.
Uneven droplets from a
conventional hydraulic
Relatively even droplets
from a MICROMAX CDA
Figure 14 – Uneven and even droplets
Micron’s MICROMAX CDA atomisers use spinning discs, with precision
formed grooves and teeth, to produce droplets. When the disc speed
and spray liquid feed rate are correctly set, they produce relatively even
droplets sized to suit the application. Overly large and overly small
An understanding of how the
droplets are formed is desirable,
in order to correctly select disc
speed and spray liquid flow rate.
At low flow rates, large single
droplets are emitted from the
atomiser disc’s ‘teeth’.
As the liquid feed rate increases
ligaments form producing
smaller droplets. A point is
reached where all droplets
become ‘ligament formed’ (see
DIRECTION OF ROTATION
Figure 15 – Single droplet
atomisation
25
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
The atomiser disc’s speed
determines the size of the
droplets produced in each
mode. The faster the disc spins,
the smaller the droplets.
Further increasing the spray
liquid feed rate will eventually
‘flood’ the grooves and teeth,
causing ‘sheeting’. Droplets are
then formed by the random
disintegration of the sheet,
similar to a conventional
MICROMAX
DIRECTION OF ROTATION
Figure 16 – Ligament
atomisation
6.3 COVERAGE DENSITY
The objective of an agricultural sprayer is to distribute sufficient active
ingredient evenly over a target area. The density of coverage required
for excellent efficacy is mainly dependent upon the leaf area and
growth stage of the crop or target and the type of chemical being
Crop or Leaf Growth Coverage Density
Type of spray target Area Stage droplets/cm2 ground area
density Index (feekes)
(droplets/sq. inch)
Pre emergent
Nil
Nil
Nil
50–100 (320–650)
Translocated
post emergent Sparse 1/2
1–2
50–100 (320–650)
herbicide
Translocated Mediumpost emergent dense 1 – 2 3 – 7
100 (320)
herbicide
Translocated
1
fungicide and Sparse/2 – 2 1 – 10
50–100 (320–650)
dense
insecticide
Sparse- 1/ – 2 1 – 10 150–200 (970–1300)
All Table
contactD – Coverage
2
in relation to chemical and target
densedensity
26
MICROMAX
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
From a fixed volume of liquid, as the droplet size halves the number of
droplets increases eight fold.
1 x 400μm
8 x 200μm
64 x 100μm
512 x 50μm
Figure 17 – Number of droplets from a fixed volume of spray
liquid
The ability of a MICROMAX CDA atomiser to produce relatively even
sized small droplets allows the volume of spray liquid to be drastically
reduced, whilst maintaining the density of coverage. This is referred to
as 'Low Volume' CDA spraying.
CONVENTIONAL SPRAYING
LOW VOLUME CDA SPRAYING
Figure 18 – Volume reduction whilst maintaining coverage
27
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
MICROMAX
A Low Volume CDA sprayer should be calibrated to give the required
5
Droplet
size (μm)
(0.5)
Volume application rate l/ha (US gpa)
10
(1)
15
20
(1.5)
(2)
25
30
(2.5)
(3)
35
40
(3.5)
(4)
Number of droplets/cm of ground area
2
(droplets /sq. inch)
185
80
(1200)
100
(610)
(1230)
120
(350)
(710)
(1060)
(1420)
140
(450)
(680)
(900)
(1130)
(1350)
160
(320)
(480)
(650)
(810)
(970)
(1130)
(1290)
(390)
(480)
(580)
(680)
(770)
180
95
55
190
110
70
50
NOT NECESSARY!
165
105
75
220
140
100
60
175
125
75
210
150
90
175
105
200
120
50
60
70
80
TOO LITTLE!
(320)
(390) (450) (520)
48
55
Table
250 E – Droplet size, volume application rate and coverage
(310)
(350)
density
200
Low Volume CDA spraying allows dramatic savings to be made in the
cost of the spraying operation. Greater areas can be sprayed per tank
load, or lighter vehicles used. The spraying process is speeded up,
allowing more spraying days and therefore a better chance of spraying
at the optimum time.
The advantages of Low Volume CDA are even more pronounced if the
chemical can be applied during the early phase of the recommended
application period, particularly when applying herbicides. The target
will have a relatively lower leaf area, and so will require less chemical
for good coverage.
It is vital, however, that consideration be given to the stage of growth,
28
MICROMAX
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
6.3 DROPLET TRANSPORT AND DEPOSITION
Most agricultural sprayers (excluding air-assisted and electrostatic) use
various combinations of initial momentum, gravity, and controlled drift
to transport the spray liquid droplets to, and deposit them on, the
target.
6.3.1 Initial Momentum
Momentum is a function of an object's velocity multiplied by its mass,
and is the force that makes an object continue to move once the force
causing it to move in the first place has been removed.
A droplet gains its initial velocity and hence initial momentum during
production, either by a rotary disc CDA atomiser or by a conventional
hydraulic pressure nozzle.
Air resistance (drag) slows the droplet, usually reducing its initial
momentum to zero within a relatively short distance. Gravity will can
also act against a droplet's initial momentum, if it is travelling upwards.
Rotary disc CDA atomisers and conventional hydraulic spray nozzles
both use the initial momentum of droplets to spread them laterally,
producing their characteristic spray patterns.
Many conventional hydraulic spray nozzles also use the initial
momentum of large droplets to transport them to, and deposit them
on, a target.
This is not an effective method for smaller droplets as their initial
momentum is too low, due to their very low mass, resulting in the
droplets being easily deflected from their target by small air currents.
29
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
30
MICROMAX
MICROMAX
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
6.3.2 Gravity
Gravity is the force which accelerates objects downwards, and is a
function of an object's mass. Air resistance (drag) acts against gravity
to slow the object.
As gravity accelerates an object its downward velocity, and therefore
momentum, increases.
The object, if unhindered, continues to accelerate until it reaches its
'terminal velocity', when the forces of gravity and air resistance are
balanced causing the object to cease accelerating.
Rotary disc CDA atomisers and conventional hydraulic spray nozzles
both use gravity to transport larger droplets vertically downwards, and
to deposit them onto the top surfaces of a target.
This is not effective for smaller droplets as their terminal velocity and
hence momentum is very low, due to their very low mass. This lack of
momentum results in the droplets being easily deflected from their
target by small air currents.
6.3.3 Controlled Drift
Drift is the lateral transportation of droplets away from their point of
release by natural wind currents.
The distance a droplet will travel depends on the mass of the droplet
and the strength of the wind. Tiny droplets in a strong wind may travel
great distances, whereas large droplets in a light wind may hardly be
deflected at all.
Uncontrolled off-target drift is always undesirable. However, in many
applications, controlled drift is essential for good penetration and even
coverage.
The droplets produced by a correctly set rotary CDA atomiser are
relatively uniform, allowing better control of drift.
Better drift control improves coverage and reduces the risk of offtarget spraying and subsequent crop and/or environmental damage.
31
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
2–
Lowering and angling the
atomisers aids penetration of
the spray through a crop. The
rolling action of the turbulent
air flow close to the crop helps
to draw the chemical down
into the crop microclimate.
Where weeds are the target
and they are in the bottom of
the crop, droplets should be
32
MICROMAX
MICROMAX
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
6.2.4 Deposition and retention
If the target is a crop (i.e. defoliants, fungicides), insects feeding on a
crop (insecticides), or weeds within a crop (selective herbicides) the
spray is most suitable if it is applied as droplets in the range 100μm to
200μm. This minimises any risk of uncontrolled spray drift whilst
reducing the amount of chemical required, as CDA capitalises on two
facts:
Larger droplets in the range 200μm to 500μm are most suitable for
foliar fertiliser, soil applications, pre and post-emergent herbicide
applications, and where drift avoidance is essential.
Smaller droplets in the range 75 to 150 are most suitable for contact
insecticides, achieving high coverage levels and forming a dense mist
effective against insects in-flight. Smaller droplets are also more easily
distributed by the turbulent air currents within the crop canopy,
achieving better under-leaf and vertical stem coverage.
Please contact Micron for the latest information (i.e. recommendations,
trials reports, expert contacts) relating to specific areas of application.
6.2.5 Spray concentration effect
Experience with CDA has shown that results are often far better if an
additive such as an adjuvant oil or wetter is included in the chemical
mix.
Without an additive the spray may consist of droplets that have high
viscosity and surface tension, preventing the droplet spreading on
impact. When the liquid evaporates the chemical will be concentrated
on a small area of the target. This may destroy the plant tissue (scorch)
and inhibit intake and translocation of the chemical.
33
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
MICROMAX
The effect of the additive is to reduce the surface tension of the
droplet. This significantly increases the area covered by the droplet,
reducing the risk of scorch and increasing absorption.
Increased surfactant levels may also dissolve and penetrate the waxy
surfaces of plants and insects. However, an excessive amount of wetter
can lead to foaming of the spray mix at very low application volumes.
Several chemicals, including hormone herbicides, do not mix freely
with adjuvant oils and can scorch a crop that is under stress.
DROPLET WITHOUT
ADDITIVE
DROPLET WITH
ADDITIVE
SMALL AREA OF
CHEMICAL DEPOSIT
LARGE AREA OF
CHEMICAL DEPOSIT
Figure 21 – The addition of a wetter reduces surface tension
In dry and/or sunny conditions the size of a water-based spray droplet
decreases rapidly due to evaporation. The resulting droplet may be
very concentrated, have a high surface tension, and may not spread on
impact. This may result in plant tissue damage and make spraying less
effective.
Evaporation will also increase the risk of drift.
The addition of an adjuvant oil at 2% - 5% of the total spray volume
will help prevent evaporation.
34
MICROMAX
6 – BASICS OF CONTROLLED DROPLET APPLICATION (CDA)
6.4 CDA IN ACTION
6.4.2 Reducing volumes and dose rates
With some chemicals, the advantages that CDA gives in relation to
more effective coverage allow the use of reduced dose rates whilst
maintaining efficacy. However, the reduction of dose rates is
undertaken at the individual user’s own risk and is best done based on
comprehensive trials data.
Reduced dose rates are not recommended in all situations. Care must
be taken with respect to possible increases in weed, pest and disease
resistance resulting from a sub-optimal treatments.
6.4.3 Reduced drift and run-off
The accurate control of droplet size allows not only more effective
treatment, but also the selection of the most appropriate spray quality
to reduce environmental damage due to drift and run-off.
Tiny droplets that cause drift and oversize droplets that cause run-off
can be dramatically reduced.
Please call on Micron’s extensive experience and library of trials
data for further information on particular applications and current
recommendations. Academic and experienced user contacts can
also be provided.
35
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
Before each use the sprayer must be calibrated for droplet size and
application rate.
It is important to note that the data provided in the following section is
based on performance with water and is intended as a guide. Actual
performance will vary according to the formulation of chemical being
used. It is therefore vital that the calibration of the system is checked
whenever a new chemical is used.
The following sections describe the calibration procedure for a typical
MICROMAX based sprayer. The procedure may vary with some types
!
•
•
IMPORTANT SAFETY RECOMMENDATIONS
Failure to correctly calibrate the sprayer may result in crop
damage, ineffective treatment or environmental damage
through excessive run-off and/or drift.
When calibrating a sprayer, take safety precautions as per
7.1 DROPLET SIZE AND ATOMISER SPEED
7.1.1 Atomiser Speed Selection
The MICROMAX has three speed settings or gears providing three
droplet size ranges. Select the appropriate setting for the application
from table G ‘Atomiser Speed Selection’ on Page 33. Refer to section 6
– ‘Basics of controlled droplet application’ for further guidance on
droplet sizes.
7.1.2 Atomiser Speed Setting
The chosen speed is set by moving the MICROMAX’s drive belt, by
hand, to one of the three available positions, see Figure 22 ‘Atomiser
Speed Setting’ on page 33. Ensure that the belt is tight and level, and
36
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
Application
Speed Setting Nominal Disc Droplet Size
Speed
Range
Herbicides,
Low
Foliar Fertilisers,
Soil Applications,
and Drift
Minimisation
Fungicides and Medium
Insecticides
Contact
High
Insecticides
2000 rpm
200 – 500 μm
3500 rpm
100 – 200 μm
5000 rpm
75 – 150 μm
Table G – Atomiser Speed Selection
MOTOR
LOW SPEED
MEDIUM SPEED
HIGH SPEED
DISC
Figure 22 – Atomiser Speed Setting
37
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
7.1.3 Checking Atomiser Speed
On first use, at the start of each spraying season, and periodically
throughout the season MICROMAX atomisers should be checked for
correct running speed using an optical tachometer, timing strobe or
other similar suitable device.
Fast running is usually due to a fault in the electrical system, whereas
slow running may also be due to atomiser motor problems. See
section 10 ‘Trouble shooting’ should a significant deviation (+/- 10%)
from the stated running speeds be experienced (see Table A ‘Typical
performance data’ on page 3).
!
•
•
IMPORTANT SAFETY RECOMMENDATIONS
Be aware that when a MICROMAX atomiser is running it
rotates at high speed, which and can present an
entanglement hazard and risk of injury by cutting by the
discs’ teeth.
Secure loose clothing and long hair.
7.2 APPLICATION RATE AND FLOW RATE
7.2.1 Determining the required spray volume and dose rate
Choosing the appropriate chemical dose rate, concentration, and
therefore spray liquid volume application rate is essential for successful
spraying.
CDA technology allows significant reductions in spray liquid volume
application rates, and often also chemical dose application rates, to be
made whilst maintaining efficacy. Refer to section section 6 – ‘Basics of
Controlled Droplet Application’ for further discussion of the principles
behind reducing volumes and dose rates.
The following guidelines should be followed, backed up where possible
by data from field trials. Contact Micron for further guidance if
38
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
GUIDELINES FOR THE APPLICATION OF PESTICIDES WITH CDA REDUCED VOLUME SPRAYING.
Chemicals are categorised into three groups when applying through
CDA equipment.
1. Chemicals whose labels give specific CDA instructions:
For chemicals available as CDA formulations or with label instructions
on use with CDA equipment the label instructions should be followed.
2. Chemicals whose labels prohibit higher concentrations:
Including products where the label prohibits low volume spraying at
the recommended dose, having a statutory maximum concentration,
or classified as very toxic, corrosive or posing serious risk of eye injury.
Spray volumes may be reduced only if the product dose is reduced in
line with the spray volume so as not to exceed the maximum
concentration recommended on the label.
EXAMPLE:
The maximum label concentration of spray at 5 l/ha dose in 200 l/ha
spray volume = 2.5% product in water.
So at 100 l/ha reduced volume spraying, maintaining the maximum
concentration at 2.5% gives a maximum dose rate of 2.5 l/ha.
3. Chemicals whose labels allow increased concentration:
Spray volumes may be reduced at full dose rates. The maximum
concentration permitted is 10X the maximum concentration
recommended on the label for conventional spraying.
EXAMPLE:
The maximum label concentration of spray at 5 l/ha dose in 200 l/ha
spray volume = 2.5% product in water.
So a full 5 l/ha dose can be used down to a spray volume of 20 l/ha,
giving a spray concentration of 25% product in water.
At volumes below this the dose rate must be reduced to maintain a
maximum 10x concentration as per 2 above.
‘OFF-LABEL’ USERS WILL HAVE TO ACCEPT RESPONSIBILITY FOR
THE EFFICACY OF THE TREATMENT.
39
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
7.2.2 Determining the area sprayed per minute
Once the required volume application rate and dose rate have been
established, the area sprayed per minute must be determined in order
to calculate the required sprayer output per minute.
The area sprayed per minute is dependant on the swath width and the
forward speed of the sprayer.
7.2.2.1 Swath width
The swath width will depend on the design of the sprayer and the
number of MICROMAX atomisers used. As a general guide for nonshrouded sprayers, one MICROMAX atomiser alone produces a swath
approximately 2.4m wide. Two or more atomisers spaced equally will
produce a swath width equal to:
2.4m + [Atomiser spacing (m) x [Number of atomisers - 1] ]
EXAMPLE:
For a 12m boom sprayer with 12 MICROMAX heads spaced at 1m the
swath width would be calculated as:
2.4m + [ 1m x [12 – 1] ]
= 2.4m + [1m x 11]
= 2.4m + 11m
= 13.4m
However, this sprayer should be driven through the crop on a 12m
track spacing in order to achieve the required spray pattern overlap for
the end atomisers, and give equal coverage. Therefore the swath
should be assumed to be 12m.
7.2.2.2 Forward speed
If the sprayer or tractor is fitted with a reliable and accurate forward
speed indicator simply convert the forward speed to be used to
metres per minute (m/min) using the calculations below:
40
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
If the sprayer or tractor is not fitted with a forward speed indicator, use
markers to determine the forward speed. Start the vehicle and adjust
the throttle to achieve the required constant forward speed, drop the
first marker, time 30 seconds then drop the second marker. Measure
the distance in metres between the two markers. Simply multiply this
by 2 to give the forward speed in metres per minute (m/min).
7.2.2.3 Calculation of area sprayed per minute
Using the figures obtained for swath width and forward speed
determined as per 7.2.2.1 and 7.2.2.2 above, the area sprayed in
Area sprayed
= Forward speed X Swath width
10000
EXAMPLE:
If a forward speed of 9 kph and a swath width of 12m is used:
Area sprayed
=
150.3 m/min
X
12 m
10000
Area sprayed
=
0.18 ha/min
AREA SPRAYED (m /min)
2
SWATH WIDTH
Figure 23 – Area sprayed per min
41
DISTANCE TRAVELLED
IN 1 MIN (m)
=
FORWARD SPEED
(m/min)
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
7.2.3 Determining the total sprayer output per minute
Using the required spray liquid application rate in litres per hectare and
the area sprayed per minute determined as per 7.2.1 and 7.2.2 above,
the total sprayer output (litres per minute) is calculated as below.
Total output
Spray liquid
application
=
X
Area sprayed
per minute
EXAMPLE:
Using the example figures from 7.2.1, i.e. 9 kph forward speed with a
12m swath gives an area sprayed per min figure of 0.18 ha/min.
Assume (as per 7.2.1) a required application rate of 30l/ha spray liquid,
Total output (l/min) =
30 l/ha
X 0.18 ha/min
Total output (l/min) = 5.4 l/min
7.2.4 Determining the output per atomiser per minute
Using the total spray liquid output rate in litres per minute calculated
in 7.2.3 above, and the known number of MICROMAX atomisers used,
the output (litres per minute) per atomiser is calculated as below.
Total output (l/min)
Output per MICROMAX =
Number of atomisers
EXAMPLE:
Using the example figures from 7.2.1 and 7.2.2, apply 5.4 l/min through
Output per MICROMAX =
5.4 l/min
12
42
= 0.45 l/min (or 450 ml/min)
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
2.4 +
(
Number of
X
(
Swath
-1
Forward
mp X 26.8
or
kph X 16.7
or
Distance travelled
m
)) =
m
SECTION 7.2.2.1
Forward
m/
=
X 2
SECTION 7.2.2.2
Area
ha/
m/
=
m
X
10000
SECTION 7.2.2.3
Application
rate required
ha/
X
Total sprayer
l/ha =
l/
SECTION 7.2.3
SECTION 7.2.4
Output per MICROMAX
=
l/
l/
Number of atomisers
Figure 24 – Calculating flow rate (l/min) per MICROMAX
NOTE:
MORE COPIES OF THIS CALCULATION GRID MAY BE FOUND IN
SECTION 14 – ’USER NOTES’.
43
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
7.2.5 Compensating for MICROMAX performance parameters
In order to produce the droplet spectrum required, the MICROMAX
atomiser must be used with a flow rate within the ranges specified in
Table H ’Flow rate parameters’ below.
Application
Speed Setting Minimum
Flow Rate
Maximum Flow
Rate
Herbicides,
Foliar Fertilisers,
Soil
Applications,
and Drift
Minimisation
Fungicides and
Insecticides
Contact
Insecticides
Low
0.5 l/min
3 l/min
Medium
0.25 l/min
1 l/min
High
0.125 l/min
0.5 l/min
Table H – Flow rate parameters
If the required flow rate per MICROMAX atomiser (see section 7.2.4)
does not fall within the permissible range, for the speed setting for the
application, action must be taken to compensate and bring the flow
rate into the range. The suggested actions being:
Flow rate too high:
Reduce the application rate required whilst maintaining the dose rate
by increasing the spray liquid concentration (see section 7.2.1 for
limits).
Reduce the forward speed of the sprayer.
Flow rate too low:
Increase the application rate required whilst maintaining the dose rate
by reducing the spray liquid concentration (see section 7.2.1 for limits).
Increase the forward speed of the sprayer.
Re-calculate the flow rate required after adjustment to check that it
44
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
7.2.6 Setting the required flow rate
The flow rate to each atomiser is usually set to be the same.
Flow is regulated by the MICROMAX’s coloured nozzles and/or a flow
restrictor fitted into the line before each MICROMAX head (see Section
5.2.1) and the spray line pressure.
7.2.6.1 Nominal spray line pressure and permitted adjustment
The spray line pressure should be maintained within the range allowed
for correct operation of the diaphragm check valves fitted (normally 1.0
– 1.75 bar – check manufacturers specifications).
Higher pressures can be used to achieve higher flow rates, however it is
better to select a higher VRU setting or larger orifice plate / nozzle.
This will reduce the risk of blockages and also provide more consistent
flow when applying wettable powders.
Lower pressures should not be used as they will prevent the diaphragm
check valves from opening correctly.
It is recommended that a nominal pressure of 1.5 bar is used, with a
maximum adjustment of +/- 0.25 bar to achieve flow calibration.
7.2.6.2 Coloured nozzles
The MICROMAX atomiser is supplied with three sets of two coloured
nozzles, Blue, Yellow and Red. These equate roughly to the orifice
plate sizes 31, 43, and 48 respectively.
Low cost flow control can be achieved by using these nozzles singly or
in pairs (i.e. fit both but plumb spray line to only one or both) without
fitting a separate flow restrictor.
Where this method is to be used follow the procedures in 7.2.6.4
‘Orifice plates’ below, equating the single coloured nozzles to the
orifice plate sizes stated above. Use in pairs doubles the flow at any
given pressure.
EXAMPLE:
45
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
If a variable restrictor unit or orifice plate holder unit is to be used to
control flow, simply fit the two Red nozzles and plumb spray line to
both. These will then have no effect on the flow rate until it reaches
over 1.3 l/min at 1 bar, when they will begin to act as a pair of orifice
plate size 48 restrictors as described above.
7.2.6.3 Variable Restrictor Units (VRUs)
The procedures given below in section 7.6.2.4 ‘Orifice Plates’ apply
equally to variable restrictor units (VRU) utilising a number of
selectable orifice sizes, however the manufacturers data will have to be
consulted to obtain flow rate vs. pressure figures for each setting.
Infinitely variable restrictor units (i.e. needle valves) are not
recommended due to their instability (particularly their susceptibility to
vibration) and tendency to block easily. They also tend to be
expensive.
7.2.6.4 Orifice plates
Orifice plate type flow restrictors are most commonly used due to their
robust simplicity and low cost, the following procedure is presented
assuming their use.
Select the orifice plate size that gives nearest to the required flow rate
at the nominal system pressure. Data for commonly used orifice plates
are given in Figure 25 ‘Graph of Flow Rate vs. Pressure for common
orifice plate sizes’ on page 43, else refer to manufacturers data.
Spray line pressure is then adjusted up or down to give the correct flow
rate.
EXAMPLE:
From section 7.2.6.1 a nominal system pressure of 1.5 bar is
determined. Following on the example from previous sections, a flow
rate of 450 ml/min is required.
46
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
ORIFICE
1400
55
1200
48
1000
FLOW RATE (ml/min)
)n
i
m
/l
m
( 800
ET
AR
W
O
LF
43
37
600
Nearest Size
31
Required
Flow Rate
400
26
er
sus
er
p
de
ri
uq
e
R
200
0
0.7
10.5
reu
ss
er
pl
an
i
om
N
1.4
PRESSURE (bar)
PRESSURE
(bar)
1.75
2.1
Figure 25 – Graph of flow rate vs. pressure for common orifice
plate sizes.
47
7 – CALIBRATION AND ADJUSTMENT
MICROMAX
7.2.7 Checking and calibrating the flow rate
Before each use the sprayer should be calibrated to ensure that the
flow rate output from each MICROMAX is as expected and desired.
Firstly ensure that the correct VRU setting is selected if used, the
correct orifice plates and coloured nozzles are fitted, and that the
system pressure is adjusted to approximately the correct value.
Always calibrate the sprayer with the spray liquid to be used, variations
in viscosity and density between formulations will effect the output.
See section 8 ‘Operation’ for guidance on mixing and filling before
calibration.
CALIBRATION PROCEDURE:
Place a pail under each MICROMAX head on the sprayer, making
sure that the sides of the pail extend above the disc’s teeth.
Start the MICROMAX atomiser/s rotating.
Turn the spray liquid on, time 1 minute accurately then turn off.
Stop the MICROMAX/s.
Measure the output (ml/min) from each MICROMAX by carefully
pouring the spray liquid collected in each pail into an accurate
measuring jug graduated in millilitres.
If the output is not correct adjust the spray line pressure up or
down as required and repeat the procedure above.
The output from each atomiser should be the same. If not then
check the nozzles, orifice plates / VRU settings, and nozzle filters
•
•
•
•
•
•
•
!
•
•
•
IMPORTANT SAFETY RECOMMENDATIONS
Spray liquid collected during calibration should be poured
back into the spray tank, or if contaminated disposed of
according to local regulations.
Collection and measuring vessels should not be used for any
other purpose and should be washed thoroughly before
storage.
When calibrating a sprayer, take safety precautions as per
48
MICROMAX
7 – CALIBRATION AND ADJUSTMENT
7.2.8 Verifying application rate
During use the amount of spray fluid used and area covered should be
monitored to check that the correct application rate (l/ha) is being
achieved.
The simplest method to do this is to calculate the area sprayed per
tank load.
If the sprayer or tractor is fitted with a ‘distance travelled’ meter this is
Area sprayed
=
Distance
X Swath width
10000
NOTE: 1 mile = 1609 m, 1 kilometre = 1000 m
If no meter is fitted then the spraying time (in minutes) multiplied by
the forward speed (m/min) calculated previously in section 7.2.2.2 will
also give the distance travelled in metres. The area sprayed is then
calculated as above. Else estimate area sprayed from known field size
etc.
The spray fluid load (litres) in the tank is then divided by the area
sprayed (ha) to give the actual application rate achieved in l/ha. If this
varies from that required adjust the sprayer output up or down
accordingly.
EXAMPLE:
From previous example figures used, an application rate of 30 l/ha is
required using a 12m swath boom sprayer travelling at 9 kph (150.3 m/
min). The sprayer is calibrated to give the theoretical output required,
and loaded up with 250l of spray mixture. It then takes 50 minutes to
empty the spray tank. Therefore:
⇒ distance travelled = 50 min x 150.3 m/min = 7515 m
⇒ area sprayed (ha) = 7515m x 12m / 10000 = 9.02 ha
⇒ application rate achieved = 250l / 9.02 ha = 27.7 l/ha
49
8 – OPERATION
MICROMAX
8 – OPERATION
!
•
•
IMPORTANT SAFETY RECOMMENDATIONS
Using agrochemicals is a hazardous process. Operators
should take the recommended safety precautions, wear the
necessary personal protective clothing and equipment,
and be familiar and comply with all relevant legislation and/or
regulations. Refer to section 4 ‘safety and the Environment’.
Spray operators should be fully trained on the specific
spraying machine to be used, certification is usually required
8.1 PRE-OPERATION CHECKS
Before commencing each spray operation the sprayer should be
thoroughly checked for safety and correct operation. Each type of
sprayer will require different checks, but they should include at least
the following:
• Check that the atomisers rotate freely.
• Check that the pulleys and belts are clean and free from damage.
• Check that all atomiser discs are secure and free from damage or
blockage by dried chemical.
• Ensure that the atomisers are securely and correctly positioned on
the boom or support structure, and that they are set to the correct
distance from the crop/target to be sprayed, see Section 5
‘Installation’.
• Inspect the entire sprayer for damaged or twisted hoses, leaks in
the chemical system, or damaged wires.
• Clean all filters.
• Turn the atomiser’s motors on, ensure all are rotating.
50
MICROMAX
8 – OPERATION
8.2 WHEN TO SPRAY
8.2.1 Application timing
The recommendations for CDA spraying are the same as for
conventional spraying, however the advantages of CDA are more easily
achieved if the chemical can be applied during the early phase of the
recommended application time, particularly when applying herbicides.
See section 6 ‘Basics of controlled droplet application’.
8.2.2 Suitable ‘spraying days’
CDA spraying should only be carried out on days suitable for
conventional spraying.
When using the MICROMAX at its medium or high speed wind
movement is beneficial as it imparts lateral movement to the spray
aiding penetration and coverage of denser canopies, 8 to 16 kph is
recommended.
Also at the medium and higher speeds the droplets produced are
prone to evaporation, a suitable anti-evaporant (1-1.5%) should be
used. This is particularly important in warm climates or on warmer
days.
8.3 FILLING & MIXING
Mixing and filling is generally the most hazardous process in the
spraying operation. Always follow the label instructions. It is
important that all necessary protective safety clothing is used, refer to
section 4 ‘Safety and the Environment’.
8.3.1 Tank Filling
Agricultural sprayers should only be filled indirectly by open and free
falling water, particularly when filling from the water mains. This is to
avoid contamination of the water supply by reverse suction of the
filling pipe back into the water source. The filling tube must not come
into contact with the liquid inside the tank.
Sprayer designs will vary, but most tanks are fitted with a filling filter,
51
8 – OPERATION
MICROMAX
Only the quantity of spray liquid needed for the spray operation should
be mixed, eliminating the need to store or dispose of any excess.
Mixed chemical solution should not be left in the spray tank overnight.
The manufacturers recommendations should be followed, but in
general the water is added to the spray tank first.
To calculate the quantity of water needed first calculate the total spray
liquid required by multiplying the area to be sprayed (ha) by the
application rate (l/ha) previously determined (see section 7.2.1).
Remembering that the spray fluid will usually (for CDA spraying)
Percentag
Percentage Percentage Percentage
e water in = 100% – chemical – wetting –
antiWater
=
Percentag
e water in X
Area
sprayed* X
Application
rate*
100
* NOTE: Substitute ‘tank capacity (l)’ for ‘area sprayed (ha) x
However, most sprayer’s tank graduations are in tens of litres. It is
simplest to put half the water load into the tank, then add the
chemicals, then top the water level up to give the desired total volume.
EXAMPLE:
The tank mix to be used will consist of 2.5% chemical product, 1%
wetting agent and 1% anti-evaporant. Therefore:
Percentage water in tank mix = 100% – 2.5% - 1% - 1% = 95.5%
The tank will hold 250l and it is desired to spray the maximum between
fills at 20l/ha (area to be sprayed = 250l / 20l/ha = 12.5 ha per tank
load). Therefore:
52
MICROMAX
8 – OPERATION
8.3.2 Adding chemicals
In general for CDA spraying a chemical product, a wetting agent and
an anti-evaporant are added to the mix. The quantities required of
each spray mix constituent are calculated as below.
Quantity of
Percentage
spray mix = of spray mix X
constituent
constituent
Area
sprayed* X
Application
rate*
100
* NOTE: Substitute ‘tank capacity (l)’ for ‘area sprayed (ha) x
!
IMPORTANT SAFETY RECOMMENDATIONS
Always wear gloves.
Always use the correct
equipment.
Always wash off any
Always clean all
53
8 – OPERATION
MICROMAX
EXAMPLE:
As per the previous example, the tank mix to be used will consist of
2.5% chemical product, 1% wetting agent and 1% anti-evaporant. The
tank mix will total 250l. Therefore:
Chemical product required = 2.5% x 250 litres / 100 = 6.25 litres
Wetting agent required = 1% x 250 litres / 100 = 2.5 litres
Anti-evaporant required = 1% x 250 litres / 100 = 2.5 litres
To check calculations, the quantities calculated for each consituent
should add up to the total spray load. From 8.3.1 the quantity of water
required was calculated as 238.75 litres. Add the quantities calculated
8.3.3 Mixing
Good mixing and a good agitation before and during the spraying
operation are very important for a correct distribution of agrochemicals
onto the crop or target.
In order to achieve adequate mixing of products in the tank prior to
spraying, with the spray line pressure valve set to zero so that the
pump bypass returns all product to the tank, run the pump for 10-15
minutes to thoroughly agitate and mix the spray solution. This should
be done prior to calibration.
Ensure that the spray system has aggressive tank agitation. Spray
solutions formulated for CDA spraying will normally be more
concentrated than for conventional spraying, requiring thorough and
continuous mixing.
8.4 SPRAYING
Before commencing spraying operations the MICROMAX atomisers
should be set to the correct speed for the application and the sprayer’s
output should be set and calibrated (see section 7 – ‘Calibration’)
The actual method used for the spraying operation will depend on the
type of machine, the crop or target and the application type. For
further advice on specific operations consult a qualified and
54
MICROMAX
8 – OPERATION
The following points should, however, be noted for all types of
application and spraying methods.
NOTES FOR SPRAY OPERATION:
•
•
•
•
•
•
•
Always turn the atomisers on before the spray liquid.
Always use the spray liquid controls to turn chemical flow on
and off (i.e. when turning at row ends) whilst spraying. Leave
the atomisers running.
Always turn the liquid flow off several seconds before the
atomisers.
Whilst spraying periodically check (visually) that all atomisers are
turning. A stopped atomiser will be highlighted by the fact that
it will be dripping chemical rather than producing a spray.
Take care to prevent contact between the atomisers and the
ground, obstacles or the crop.
The atomisers should be oiled twice daily with two drops of light
engine oil (see section 9 – ‘Maintenance’).
Check the filters twice daily and clean as required.
8.5 AFTER SPRAYING
Dispose of any surplus spray mix
according to the product approval. Store
products safely, locked up and out of the
It is essential to flush the spray system out and to clean the sprayer
and tank thoroughly using a pressure washer or similar. In order to
clean most thoroughly (important when using a variety of types of
product on different crops) add soda to the washing liquid. Dispose of
contaminated washing liquid according to local regulations in force.
55
8 – OPERATION
MICROMAX
After working with agrochemicals, or handling spraying equipment,
always thoroughly wash hands and exposed skin. All protective
clothing should be washed separately from other clothing and stored.
8.6 STORAGE
If the sprayer is to be stored for an extended period of time before
next use, after cleaning the sprayer oil the MICROMAX atomisers (see
section 9 – ‘Maintenance’ and turn the disc several full rotations by
hand. The atomiser discs, pulleys and belt should be cleaned
thoroughly (see section 9 – ‘Maintenance‘) and the MICROMAX’s
electrical system should be disconnected from the battery.
The entire sprayer should be kept under cover if possible (use a
tarpaulin if no shed space is available) with each MICROMAX atomiser
covered individually with plastic. Consult the manufacturer for
guidelines on storage preparations for the base sprayer / spray vehicle.
It is recommended that the entire sprayer is checked and serviced
sufficiently before the start of the next spraying season to allow time to
rectify any problems without losing spraying time.
The procedures for checking and servicing the MICROMAX atomisers
and their associated electrical and spray line systems are given in
Section 9 – ‘Maintenance’.
56
MICROMAX
9 – MAINTENANCE
9 – MAINTENANCE
9.1 REGULAR MAINTENANCE
To ensure a long life and trouble free operation, the MICROMAX
atomiser requires some regular maintenance. Refer also to the base
sprayer or spray vehicle manufacturer’s guidelines for their
recommended maintenance schedule.
Your local Micron distributor / dealer may have special
recommendations based on in-depth knowledge of local applications
and climates.
9.1.1 Daily Maintenance
The following maintenance is required daily, or several times per day,
during spraying:
9.1.1.1 Oiling the disc bearings
Before use, twice daily, and at the end of each day’s spraying and/or
before long periods of storage two drops of light engine oil should be
Figure 26 – Oiling the disc bearings
57
9 – MAINTENANCE
MICROMAX
9.1.1.2 Checking the drive belts
Before the start of spraying each day check the drive belts are tight and
undamaged. Replace damaged, worn or loose (stretched) drive belts.
1
6
3
4
2
5
1 REMOVE THE SHAFT RETAINING NUT AND WASHER.
2 DROP THE DISC ASSEMBLY UNTIL THE BELT CAN BE
3
4
5
6
MANOEUVRED OVER THE TOP OF THE SHAFT.
REMOVE THE OLD BELT AND DISCARD.
FIT A NEW BELT – USE ONLY GENUINE MICRON PARTS.
LIFT THE DISC ASSEMBLY BACK INTO POSITION.
FIT THE SHAFT RETAINING WASHER AND NUT AND
TIGHTEN TO A FIRM HAND TIGHTNESS – DO NOT USE
EXCESSIVE FORCE.
Figure 27 – Changing the drive belt
9.1.1.3 Cleaning
The MICROMAX atomiser should be cleaned at the end of each
spraying day using a pressure washer or similar. Avoid directing the
water jet upwards into the nose of the motor.
58
MICROMAX
9 – MAINTENANCE
9.1.1.4 Filters and the spray fluid system
The pump suction filter and nozzle filters should be checked, and
cleaned or replaced if required, at least daily. The rest of the spray
system should also be checked daily for leaks and damage, and repairs
made as required.
9.1.2 Periodical Maintenance
The following maintenance should be carried out before the start, as
required during, and at the end of each spraying season:
9.1.2.1 Cleaning the belt and pulleys
At the end of each spraying season, ready for the next, the motor and
disc pulleys and the drive belt should be washed thoroughly using
warm water and a small brush. Do not use a soap or detergent as
residues may cause the belt to slip.
9.1.2.2 Cleaning the atomiser disc
The atomiser disc and inner cone should be cleaned at the end of each
spraying season ready for the next. Use warm soapy water and a small
stiff brush (i.e. a toothbrush). The atomiser disc must be ’dropped’ to
allow access to its inside grooved face and to the outer face of the
inner cup (see figure 28 – ‘Cleaning the atomiser disc’ on page 56.
9.1.2.3 Securing electrical connections
If screw type electrical connections have been used in the wiring
system these should be nipped up periodically.
9.2 OTHER MAINTENANCE AND REPAIRS
The MICROMAX is designed to be easily dismantled, repaired, and reassembled by any experienced technician using common workshop
tools. A full parts diagram and list, including part numbers, is given in
section 11 – ‘Parts list and diagram’.
59
9 – MAINTENANCE
MICROMAX
1
5
3
3
4
2
1 REMOVE THE SHAFT RETAINING NUT AND WASHER.
2 DROP THE DISC ASSEMBLY AS FAR AS IS POSSIBLE TO
3
4
5
6
ALLOW ACCESS BETWEEN THE ATOMISER DISC AND THE
FIXED INNER CUP.
USING A SMALL STIFF BRUSH (I.E. A TOOTH BRUSH) AND
WARM SOAPY WATER, CLEAN THE INNER FACE OF THE
ATOMISER DISC AND THE OUTER FACE OF THE INNER
CUP. PAY PARTICULAR ATTENTION TO REMOVING ALL
DEPOSITS FROM THE ATOMISER DISC’S GROOVES AND
ANY BLOCKAGES FROM THE FEED HOLES AT THE
BOTTOM OF THE INNER CUP.
LIFT THE DISC ASSEMBLY BACK INTO POSITION
ENSURING THAT THE DRIVE BELT IS LOCATED
CORRECTLY AROUND THE DISC PULLEY.
FIT THE SHAFT RETAINING WASHER AND NUT AND
TIGHTEN TO A FIRM HAND TIGHTNESS – DO NOT USE
EXCESSIVE FORCE.
WHEN ALL ATOMISER ON THE SPRAYER HAVE BEEN
CLEANED, RINSE THE DISCS BY TURNING THE
Figure 28 – Cleaning the disc
60
MICROMAX
10 – TROUBLE SHOOTING
10 – TROUBLE SHOOTING
PROBLEM
POSSIBLE
CAUSE
Blown fuse
Break in wiring
Motor doesn’t run
Failed switch or relay
Failed motor
Slipping or broken
Motor runs but disc drive belt
Slipping motor pulley
doesn’t turn
Seized disc bearings
Disc speed is too high Electrical system is
in all gears
producing over 12V
Motor pulley rubbing
on bracket
Disc speed is too low Disc bearings binding
in all gears
Voltage drop in wiring
too high
Blocked feed hole in
Spray pattern is
inner cup
uneven
Damaged disc
Feed rate too high or
too low for disc speed
Droplet spectrum is Blocked disc grooves
poor
SUGGESTED
SOLUTION
Replace blown fuse
Repair break
Replace as required
Replace motor
Replace drive belt (see
Page 54)
Tighten grub screw
Replace bearings
Get electrical system
serviced and adjusted
Replace motor and
pulley
Replace bearings
Rewire with larger size
cable
Clean inner cup (see
Page 56)
Replace disc
Adjust feed rate or
change gear
Clean disc (see Page
56)
Table I – Problems, Damaged
possible causes,
solutions
disc and suggested
Replace disc
61
11 – PARTS LIST AND DIAGRAM
MICROMAX
11 – PARTS LIST AND DIAGRAM
PART NUMBER
3282
3405
4337
4338
4469/RG
4469A
4497
4546/Black
4553
4561
4655
4655A
4676
4677
4687
4708
4709
4709A
4711
4711A
4757
4764
4769
4835
4836
4838
4839
4844
5027
5097
5097A
5734
7525
QUANTITY
3
2 in 4655A
2 in 4655A
2 in 4655A
1 in 4469A
1
1 in 4469A
1
1 or 5734
4 in 4655A
1 in 4655A
1
4
3 in 5097A
2 (varies)
1
1 in 4709A
1
1 in 4711A
1
1
1
1
1
1 in 4709A
2
1
1
4
1
1
1 or 4553
1
DESCRIPTION
Nut, 5/16” BSCY, Hex
Feed Nozzle, Yellow
Feed Nozzle, Red
Feed Nozzle, Blue
Atomiser Disc
Atomiser Disc c/w Protective Ring
Protective Ring
Inner Cup
Drive Belt, Nitrile
Screw, No. 8 x 3/8”, s/t pozi pan
Mounting Plate
Mounting Plate c/w Nozzles and Screws
Screw, No. 6 x 2”, s/t pozi csk
Screw, No. 8 x 1/2”, s/t pozi pan
Shim Washer, 5/16” x 7/16”, 0.010”
Disc Pulley
Motor Pulley
Motor Pulley c/w Grub Screw
Motor Mounting Bracket
Motor Mounting Bracket c/w Oil Filler
Washer, 5/16” x 3/8”, flat
Bearing Cover
‘O’Ring
Slinger Plate
Grub Screw, 4BA x 3/8”, slotted
Bearing
Shaft
Shaft Nut, 5/16” BSCY
Screw, No. 4 x 3/8”, s/t pozi pan, s/s
Motor
Motor c/w Label and Screws
Drive Belt, Viton
Oil Cover
Table J – Parts List
62
MICROMAX
11– PARTS LIST AND DIAGRAM
Figure 29 – Parts Diagram
63
12 - NOTES ON UNITS AND USEFUL CONVERSIONS
MICROMAX
12 – NOTES ON UNITS AND USEFUL CONVERSIONS
12.1 NOTES ON UNITS
SI Units are used throughout this manual except where the use of
other units increases clarity.
The ‘micron’
1 micron = 1 μm = 0.001 mm (one thousandth of a millimetre)
LENGTH / DISTANCE
1 Inch
1 Foot
1 Yard
1 Mile
AREA
1
1
1
1
=
=
=
=
0.0254
0.3048
0.914
1609.3
SI UNIT - Metre m
m (25.4 mm)
m (30.48 cm)
m
m (1.6093 km)
SI UNIT - Square Metre m
2
Square Foot
Square Yard
Square Mile
=
=
=
Acre
=
VOLUME
1 UK Pint
1 UK Gallon
1 US Gallon
0.0929
0.8361
2.59
4047.86
0.4047
m2
m2
km2 (square kilometres)
m2
ha (hectares)
SI UNIT – Cubic Metre m
1 m3 = 1000 l (litres)
3
=
=
=
0.5682
4.5461
3.785
l
l
l
SPEED
1 mph (mile per hour)
=
1 kph (kilometre per hour) = 0.278 m/s
1.609
kph
PRESSURE
1 PSI (lbf / sq. inch)
1 Bar
1 Bar
=
=
=
SI UNIT = Metres per Second m/s
6894.76
100,000
14.5
64
SI UNIT = Pa (Pascal)
Pa
Pa
PSI (lbf / sq. inch)
MICROMAX
13 – EC DECLARATION OF INCORPORATION
13 – EC DECLARATION OF INCORPORATION
Name of manufacturer or supplier:
Micron Sprayers Ltd.
Full postal address:
Country of origin:
Bromyard Industrial
Estate,
BROMYARD,
Herefordshire
England
Post code:
HR7 4HS
Description of Product:
Name and model number of machine:
Electrically (12V DC)
powered agricultural
atomiser.
MICROMAX 3 SPEED UK
Place of Issue:
Bromyard, England
Name of authorised representative:
G. S. Povey
Position of authorised Representative:
Joint Managing Director
STATEMENT:
This product must not be put into service within the European
Economic Area (EEA) until the machinery into which it is to be
incorporated has been declared in conformity with the provisions of
the Machinery Directive 89/392/EEC as amended by 91/368/EEC,
93/44/EEC, 93/68/EEC and 98/37/EC and is certified to be in
compliance with the relevant essential health
and
safety requirements.
65
14 – USER NOTES
MICROMAX
APPLICATION:
Calculations:
Calculation Notes:
MICROMAX
2.4 +
Number of
(
X
(
Swath
-1
)) =
m
SECTION 7.2.2.1
Forward
or
mp
X 26.8
kph X 16.7
or
Distance travelled
m
Forward
m/min
=
X 2
SECTION 7.2.2.2
Area sprayed
ha/min
m/min
=
X
m
10000
SECTION 7.2.2.3
Application
rate required
ha/min
X
Total sprayer
l/
=
l/min
SECTION 7.2.3
SECTION 7.2.4
Output per MICROMAX
l/min
=
l/min
Number of atomisers
Settings:
Speed Setting: Low / Medium / High
Nozzles: Red / Blue / Yellow
VRU Setting / Orifice Plate Number:
1/ 2
Spray Line Pressure:
Notes:
www.micron.co.uk
COPYRIGHT NOTICE: PLEASE FEEL FREE TO REPRODUCE THIS PAGE
66
MICROMAX
14 – USER NOTES
APPLICATION:
Calculations:
Calculation Notes:
MICROMAX
2.4 +
Number of
(
X
(
Swath
-1
)) =
m
SECTION 7.2.2.1
Forward
or
mp
X 26.8
kph X 16.7
or
Distance travelled
m
Forward
m/min
=
X 2
SECTION 7.2.2.2
Area sprayed
ha/min
m/min
=
X
m
10000
SECTION 7.2.2.3
Application
rate required
ha/min
X
Total sprayer
l/
=
l/min
SECTION 7.2.3
SECTION 7.2.4
Output per MICROMAX
l/min
=
l/min
Number of atomisers
Settings:
Speed Setting: Low / Medium / High
Nozzles: Red / Blue / Yellow
VRU Setting / Orifice Plate Number:
1/ 2
Spray Line Pressure:
Notes:
www.micron.co.uk
COPYRIGHT NOTICE: PLEASE FEEL FREE TO REPRODUCE THIS PAGE
67
14 – USER NOTES
MICROMAX
NOTES:
68
14 – USER NOTES
MICROMAX
NOTES:
69
14 – USER NOTES
MICROMAX
NOTES:
70
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