Instruction manual
Bromyard Industrial Estate, Bromyard,
Herefordshire, HR7 4HS, UK
Tel: + 44 (0) 1885 482397
Fax: + 44 (0) 1885 483043
E-mail: enquiries@micron.co.uk
URL: http://www.micron.co.uk
CONTENTS Page
Description ............................................................................................................................... 1
Safety ........................................................................................................................................ 2
Operator protection.................................................................................................................... 2
Preparing for spraying ............................................................................................................... 3
Mixing, filling and calibration ................................................................................................... 4
Before spraying ....................................................................................................................... 10
To start spraying ...................................................................................................................... 12
To stop spraying – at the end of each spray pass/row .............................................................. 13
To stop spraying – at the end of the spraying operation .......................................................... 14
After spraying .......................................................................................................................... 14
Storage and maintenance ......................................................................................................... 15
Diagram – ULVA+/Refilling system/Micropak backpack ...................................................... 16
Parts List – ULVA+/Refilling system/Micropak backpack ..................................................... 17
Troubleshooting ...................................................................................................................... 18
DESCRIPTION
The ULVA+ is a simple robust hand-held spinning disc Controlled Droplet
Application (CDA) sprayer powered by torch (D-cell/R20) batteries, with one set of
good quality batteries giving up to twenty hours spraying time. It is designed
primarily for the foliar application of insecticides and fungicides – both water-based
mixtures (e.g. ECs, WPs) at 10 to 20 litres/hectare total spray volume and involatile
Ultra-Low Volume (ULV) formulations at 1 to 3 litres/hectare. An electric motor
spins the atomiser disc to produce uniform spray droplet size ranges (the actual size
of droplets produced depends on the atomiser disc speed which is determined by the
number of batteries fitted). Liquid is fed by gravity through colour coded feed
nozzles. The ULVA+ can apply insecticides and fungicides to various row crops e.g.
cotton, groundnuts, rice, vegetables, etc., (and it can also be used for the control of
migrant pests with ULV formulations e.g. locusts, grasshoppers and armyworm). The
sprayer produces relatively small spray droplets which are distributed and deposited
by wind and gravity, allowing several rows/metres to be treated during each spray
pass. The sprayer must therefore always be held downwind of the operator.
FEED
NOZZLE
ATOMISER DISC AND
PROTECTIVE COVER
1 LITRE BOTTLE
EXTENSION TUBE
OPTIONAL REFILLING SYSTEM
CARRYING
HANDLE/BATTERY CASE
1
ON/OFF SWITCH
Specially designed Micropak backpacks can be supplied for use with the ULVA+,
with a refilling system to refill the one litre spray bottle fitted to the spray head. Only
use ULV formulations with a backpack if appropriate chemically resistant tubing is
available (e.g. Micron Micropaks fitted with EVA tubing).
SAFETY
Using agrochemicals is a hazardous process. Operators should comply with all
relevant legislation and/or regulations governing the use of agrochemicals and should
use appropriate personal protective equipment (see ‘OPERATOR PROTECTION’).
The ULVA+ can be used with most traditional water-based insecticide and fungicide
products, as well as specific ULV formulations (only available in some countries)
which can reduce risks in mixing and filling.
Always read the product label carefully to discover:-
approved applications
maximum dose rates
maximum number of treatments
operator protection required
necessary environmental protection measures
N.B. ‘Dose rate’ refers to the amount of chemical product applied per hectare.
Never eat, drink, or smoke when working with agrochemicals. After using
agrochemicals or handling equipment wash your hands thoroughly. Keep people
(especially children) and animals out of areas being sprayed.
Always store agrochemicals safely to protect people and animals, and to safeguard
the environment (take special care to avoid water pollution). See ‘SPRAYING’
sections for guidelines on safe use of the ULVA+ in operation.
OPERATOR PROTECTION
Always wear the protective clothing items listed on the product label for mixing and
filling. The minimum protective clothing required for spraying with the ULVA+ is:
rubber gloves and boots
Face shield, eye protection and hat
long sleeved shirt and trousers
2
PREPARING FOR SPRAYING
The sprayer is delivered in a collapsed form pre-set for use with a particular number
of batteries N.B. five batteries are recommended for use with water-based products,
six to eight for ULV formulations. To assemble ready for spraying:
1) Remove the atomiser protective cover and check by hand that the atomiser disc
spins freely. Extend the sprayer and screw the one litre bottle onto the spray
head. Do not overtighten. Make sure the red cap or refilling point is in line with
the extension tube. Instructions on assembling Micron Micropak backpacks are
contained inside the tank. N.B. the feed tube from the Micropak must be securely
connected to the flow valve which should be fitted into the valve retaining clamp
on the battery case and the hose connections secured with the clips supplied. The
tubing on the sprayer should be clipped into the large hole on the battery case end
cap and attached to the flow valve.
2) Remove the switch end piece as
shown on the label.
N.B. Battery condition should always be checked before use, either in a torch or
using a torch lightbulb and electric wire – see ‘TROUBLESHOOTING’. Before
spraying for the first time with the ULVA+, sprayer operation should be checked
using only water (see ‘BEFORE SPRAYING’).
3) Insert the required number of
batteries (D-cell/R20) negative, i.e.
flat, end first.
3
MIXING, FILLING AND CALIBRATION
Mixing and filling is generally the most hazardous process in the spraying operation.
Always follow the label instructions. Always use a filter (fitted in the Micron Mi-
cropak backpacks) and use a funnel if directly filling the spray bottle. Only mix
enough spray for the area to be treated if using water-based mixtures to avoid the
need for disposal of unused spray mix.
Always wear gloves when handling
agrochemicals and equipment.
Always wash off any skin
contamination
ULV FORMULATIONS
ULV formulations are pre-mixed, i.e. ready to spray, and should have full
instructions for use on the label. These products can be poured directly into the spray
bottle using a funnel, if using the one litre twin neck bottle, or directly into the
backpack.
Always use the correct equipment
when mixing and measuring.
Always clean all equipment after
use.
4
WATER-BASED PRODUCTS
Traditional water-based insecticides and fungicides are usually applied with the
ULVA+ at 10 to 20 litres total spray volume per hectare. Most insecticides can be
used at 10 litres/hectare but fungicides may require around 20 litres/hectare. For
example, if the label recommends applying a minimum of 1 litre of insecticide
product made up to 100 litres of water per hectare with a knapsack sprayer, use 1 litre
of product made up to 10 litres for application with the ULVA+, i.e. a spray mix
concentration of 10%.
Do not use product concentrations greater than the maximum recommended on the
label (unless specific training or recommendations have been given) if the label:
a) specifically prohibits use of ‘Reduced Volumes’ i.e. increased
concentrations;
b) has a statutory requirement for use of personal protective equipment when
using the diluted product at high volumes (N.B. this will appear in the
statutory box on the label);
or
c) carries one of the following hazard ratings: ‘very toxic’, ‘toxic’ or ‘corrosive’
or carries the warning ‘risk of serious damage to the eyes’.
Micron do not generally recommend using spray mixes of more than ten times the
maximum concentration recommended for high volume application with knapsack
sprayers. At high concentrations some products can be phytotoxic to crops thus, if in
doubt, first spray a small test area. The safest product and lowest dose rate
appropriate for the treatment should be used at all times.
To prepare the spray mix with water-based products select the dose rate of product to
be applied per hectare and mix in a suitable container e.g. a Micron Micropak
Measure out the exact amount of
product.
Never use leaking equipment. Take care to avoid spillage when filling or lifting the
tank.
Half fill the tank with clean water.
Check for leaks. Add the measured
product.
5
Finish filling the tank with clean water.
ON
OFF
Replace the tank lid. Wipe the tank
with a dry cloth.
Mix well by gently shaking the tank.
Transfer the spray mix to the one litre
bottle on the spray head (by placing the
base of the bottle on the ground and
opening the flow valve).
Place the tank on the operator‘s back.
When the bottle is filled to the 1 litre
mark stop filling. The flow valve must
then be turned off.
6
CALIBRATION
YELLOW
Increased Flow Rate
ORANGE
RED
ULV FORMULATIONS
The table below indicates the relationship between spray volume, flow rate and
walking speed for the ULVA+ as per the following formula:
Flow rate (ml/min) = 6 x spray pass interval (m) x total spray volume (l/ha) x walking speed (m/s)
Spray volume
(l/ha)
Spray pass
Interval (m)
Feed nozzle Flow rate*
(ml/min)
Walking speed
(m/s)
0.8 Crop pests 5 Yellow 25 1.0
1.0 and diseases 5 Orange 34 1.1
1.0 3 Red 60 1.1
1.0 Migrant pests 5 Orange 34 1.1
1.0 10 Red 60 1.0
* Note: Assumes a standard ULV formulation viscosity of 7mm2/sec. The flow rate will differ
with liquid viscosity and for more viscous formulations it may be necessary to use a larger feed
nozzle.
For ULV applications spray passes of 3 to 6 meters can generally be used in crop
situations (5 to 10 meters for control of migrant pests on rangeland). Spray pass
intervals should be reduced as crop height increases.
Choose and fit the feed nozzle that is likely to be required. The actual flow rate
should be checked holding the ULVA+ in the spraying position with the feed nozzle
vertical. Remove the atomiser disc by unscrewing the disc fixing screw by hand and
then turn over the sprayer. Wait until the liquid flow is steady and then allow the
liquid to flow into a suitable container for one minute and measure the volume
dispensed. If the flow rate is substantially different from that required change the
feed nozzle and repeat the above procedure. If the flow rate is close to that required
adjust walking speed.
7
Example: Required spray volume = 1 l/ha; Spray pass interval = 5m
Flow rate measured = 40 ml/min
Walking speed (m/s) =
Flow rate (ml/min)
6 x spray pass interval (m) x total spray volume (l/ha)
=
40
6 x 5 x 1
= 1.33
i.e. 1.33 m/s or 80 metres in one minute (1.33 x 60)
Mark out a distance of 80 metres and practice walking it in one minute.
WATER BASED PRODUCTS
Examples of mixing spray – for 1 hectare:
a) insecticide: 1litre
add water: +9 litres
Total volume: 10 litres
i.e. 1 part insecticide : 9 parts water
b) fungicide: 3 litres
add water: +17 litres
Total volume: 20 litres
i.e. 3 part insecticide : 17 parts water
The following table indicates the relationship between spray volume, flow rate and
walking speed for the ULVA+ as per the following formula:
Flow rate (ml/min) = 6 x spray pass interval (m) x total spray volume (l/ha) x walking speed (m/s)
Spray volume
(l/ha)
Spray pass
Interval (m)
Feed nozzle Flow rate*
(ml/min)
Walking speed
(m/s)
10 ) 1.2 Red 90 1.0
10 ) Crop pests 2.5 Black 150 1.0
10 ) and diseases 3.0 Grey 175 1.0
15 ) 2.0 Pink 195 1.1
20 ) 1.5 Grey 175 1.0
* Note: Flow rates measured with water plus surfactant. Some products when mixed in water
can be more viscous and the actual flow rate through each feed nozzle may be different from
that indicated. For very viscous spray mixes it may be necessary to use a larger feed nozzle.
8
N.B. Do not exceed 3 metre spray pass intervals when using water-based spray mix-
RED
Increased Flow Rate
BLACK GREY
PINK
tures (with the sprayer set at five batteries) since the larger spray droplet sizes being
used could then result in poor spray coverage and product efficacy. Spray pass intervals should be reduced as crop height increases.
Choose and fit the feed nozzle that is likely to be required. The actual flow rate
should be checked holding the ULVA+ in the spraying position with the feed nozzle
vertical. Remove the atomiser disc by unscrewing the disc fixing screw by hand and
then turn over the sprayer. Wait until the liquid flow is steady and then allow the
liquid to flow into a suitable container for one minute and measure the volume dispensed. If the flow rate is substantially different from that required change the feed
nozzle and repeat the above procedure. If the flow rate is close to that required adjust
walking speed.
Example: Required spray volume = 10 l/ha; Spray pass interval = 3m
Flow rate measured = 150 ml/min
Walking speed (m/s) =
i.e. 0.83 m/s or 50 metres in one minute (0.83 x 60)
Mark out a distance of 50 metres and practice walking it in one minute.
Flow rate (ml/min)
6 x spray pass interval (m) x total spray volume (l/ha)
9
=
6 x 3 x 10
150
= 0.83
BEFORE SPRAYING
X
X
25
o
25
o
WIND
WIND
WIND
WIND
WIND
WIND
WIND
Since wind is used to distribute and deposit the spray the ULVA+ must always be
held downwind of the operator. Never spray without a crosswind of at lease 1 m/s
(3.6 km/hr) since good results depend on overlapping spray deposits from successive
spray passes i.e. an incremental spraying technique.
WIND
It is therefore vital to check the wind speed and direction before spraying. The
diagrams below show acceptable wind direction and how the spray route should be
planned:
Best results will be obtained in a consistent crosswind of between 1 and 4 m/s. Never
spray when there is no wind, or wind direction or speed is changeable, since the
operator then risks being contaminated by the spray. Always hold the spray head at
least one metre away from any part of the body to avoid the risk of direct
contamination by the spray. Never touch the atomiser disc when it is spinning.
10
Check that the correct number of batteries is being used for the intended application –
3
1
2
7
6
5
five for water-based products to be applied at 10 to 20 litres/hectare, six to eight for
ULV formulations to be applied at 1 to 3 litres/hectare. The number of batteries can
be altered by removing both battery adjustment screws on the battery case, pushing
the extension tube into the battery case as far as it will go and replacing both battery
adjustment screws at the desired setting. Atomiser disc speed can be checked using a
tachometer – and should be 4,000 to 6,000 rpm for water-based treatments and 7,500
to 10,000rpm for ULV treatments. The operating position of the ULVA+ should be
so that the feed nozzle is as close to vertical as possible. The spray head can be
adjusted to accomplish this by using the head locking sleeve.
Before spraying for the first time use water only to check the operation of the sprayer.
Put some clean water in the bottle and add a small amount of detergent. Check for
leaks. Switch on the sprayer with the bottle below the spray head and then turn the
sprayer over so that the bottle is above the spray head (spray liquid will then flow
through the feed nozzle onto the atomiser disc). This is the spraying position, and
spray will immediately be emitted. Start walking as soon as the sprayer has been
turned over. Practice using the sprayer by walking along a few metres and then
stopping spraying (see ‘TO STOP SPRAYING’).
11
TO START SPRAYING
WIND
Hold the spray head downwind between 0.5 to 1.0 metres above the top of the crop
canopy. Switch on the sprayer, check the atomiser disc starts spinning (never touch
the atomiser disc when spinning or hold the spray head too close to the operator) and
then turn over the sprayer. Start walking immediately.
Failure to observe wind direction and speed is the main cause of operator
contamination during spraying. A flag should be placed in position where the
operator can see it while spraying. Should the wind drop below 1 m/s or exceed 4 m/
s or change direction stop spraying immediately, and either wait for the wind to
become re-established or re-plan the spray operation (making sure the operator does
not walk through any part of the field that has already been sprayed).
It is best to hold the ULVA+ slightly to the rear so that the operator always walks
away from the spray and does not contact sprayed foliage. When using a backpack
the bottle can be filled when needed by following the bottle filling procedure outlined
earlier (see ‘MIXING AND FILLING’) N.B. The flow valve must be turned off
before starting to spray again. When all the spray mix has been used mark the
position where spraying stopped and restart spraying from this point. Do not walk
through any part of the field that has already been sprayed when leaving the field to
refill the bottle or backpack.
12
TO STOP SPRAYING – at the end of each spray pass/row
WIND
x
WIND
1
2
3
4
4
2
3
1
At the end of each spray pass or row turn the sprayer over (so that the spray bottle is
underneath the spray head) to stop the liquid flow, then switch off the sprayer. Move
upwind to the start of the next spray pass and start spraying again. The operator
should always keep the spray head downwind from their body.
1
2
1
2
3
4
TO STOP SPRAYING – at the end of the spray operation
When spraying is finished either spray out any remaining spray mix from the bottle
or drain back into the backpack by holding the spray head up (with the spray bottle
underneath the spray head) and opening the flow valve. The flow valve must be
closed once all the spray mix has been drained back into the backpack to avoid
leakage. N.B. any water-based spray mixture remaining should be used within a few
days but ULV formulations can be stored for some time. Make sure that all the spray
liquid is spun out from the spray head by keeping the atomiser disc running for a few
seconds after the spray bottle is empty. Then switch the sprayer off.
For ease of transport the backpack can be disconnected (use the flow valve to isolate
any liquid left in a backpack) and the sprayer collapsed (by removing the batteries).
The atomiser protective cover should be replaced for transport (this can only be done
if the sprayer is collapsed).
AFTER SPRAYING
1. Dispose of any surplus spray mix according to the product label. Store products
safely, locked up and out of the reach of children.
13
2. It is essential to clean the sprayer and tank thoroughly after use. Never immerse
the spray head in water or under a tap, since this will destroy the electric motor.
If using water-based mixtures a water and detergent mix should be put in the tank,
swilled around, and then sprayed out onto the treated area or an area of waste
ground. If using ULV formulations use kerosene (do not use water and
detergent) for cleaning out the sprayer. The sprayer and tank (but not the
atomiser disc) should be wiped down externally using a cloth. Periodically
remove the atomiser disc and clean with a soft brush, especially if wettable
powders have been used since these can build up on the atomiser disc and cause
poor performance.
3. After working with agrochemicals, or handling spraying equipment, always
thoroughly wash hands and exposed skin. All protective clothing should be
washed and stored separately from other clothing. Contaminated gloves should
be washed inside out.
14
STORAGE AND MAINTENANCE
Before storing the ULVA+ for long periods remove the motor and dry it to avoid
corrosion. To disassemble the spray head remove the atomiser disc and feed nozzle,
unscrew the four screws in the motor housing and then detach the front part of the
motor housing. Remove the motor by its shaft and dry, e.g. placing it in the sun for a
few hours. Re-assemble (with a new motor if the existing motor is corroded or worn)
making sure that the ‘O’ ring seals (part nos. 5403 and 5398) and terminal connecting
springs are correctly positioned. Make sure they polarity is correct N.B. the positive
terminal has a small mark and should be connected to the red wire. Check that the
small nylon air vent tube is replaced correctly within the extension tube. The sprayer
can be disassembled by removing the four screws in the battery case and all electrical
contacts cleaned with a wire brush or similar. If the extension tube is dirty where it
passes through the battery case end cap this should be cleaned. Re-assemble and
with the sprayer in the collapsed position, i.e. batteries removed, store in a dry place
away from direct sunlight. Batteries should be stored in a cool dry place.
Clean switch
contacts and
check spring
remove batteries
Inserting
nylon
motor removal
RED WIRE
positive
terminal
clean contacts
15
16
ULVA+ PARTS LIST
DESCRIPTION PART
BOTTLE CAP – BLACK 3216 BUNG 5415
AIR VENT TUBE – 0.20M 3512/20 TERMINAL RING 5575
WIRE, 1.00MM, BLACK – 0.94M 4134/94 NUT, M5, WING 6019
WIRE, 1.00MM, RED – 0.98M 4368/98 WASHER, M5 X 25 OD X 1.5 THICK 6020
SPRING HOLDING PIN 4447 SCREW, M5 X 30, HEX. SET 6021
SPRING, 9/32” 4457 SWITCH PLUG 7464
BOTTLE CAP – BLACK 4489 SWITCH SLEEVE 7465
SCREW, NO. 6 X 3/8” S/T 4646 SWITCH CONNECTOR 7495
BOTTLE, 1 LITRE (TWIN NECK) 5265 LABEL, ULVA+ 8592
MOTOR, 12 VOLT, ULVA+ 5320 LABEL, BATTERY ON/OFF 8621
CORK WASHER 5353
SPRING, BATTERY CASE 5363
BOTTLE HOLDER 5365
MOTOR FRONT PLATE 5366RG TUBE, 6MM ID X 9MM OD – 1.00M, PVC 4993/100
MOTOR HOUSING 5367RG STRAP – 1.25M 5107/125
HEAD LOCKING SLEEVE 5368 BOTTLE, 1 LITRE (REFILL SYSTEM) 5290
NUT, UNION – BLACK 5369 BACKPACK, 5 LITRE 5404
DISC FIXING SCREW 5372 TUBE, 8MM ID X 12MM OD – 0.90M, PVC 5414/90
ATOMISER DISC 5373 CLIP, HOSE, SIZE BB 5417
CENTRE CONNECTOR 5375 CLIP, HOSE, NO.12, WINGSCREW 5464
BATTERY CASE END CAP 5376 TAP 5776A
BATTERY CASE 5377 HOSE CONNECTOR, 6MM 5778
FEED NOZZLE, YELLOW 5383 UNION NUT 5779
FEED NOZZLE, ORANGE 5384 VALVE CLAMP 5780
FEED NOZZLE, RED 5385 SCREW, M5 X 12, POZI, PAN, PT 5956
FEED NOZZLE, BLACK 5386 C LIP, HOSE, WIRE 9.1MM 6028
FEED NOZZLE, PINK 5387 C LIP, HOSE, WIRE 11.9MM 6029
PROTECTIVE COVER 5396RG
‘O’ RING, BS 012, VITON 5398
SCREW, NO.6 X 3/8” S/T POZI PAN/HEAD B 5399 CAP, BACKPACK – BLACK 5208
EXTENSION TUBE 5400 BALL, 3/16” DIA, POLYPRPYLENE 5210
‘O’ RING, BS 121, VITON 5403 CORK GASKET SEAL 5346
ATOMISER WASHER 5407 AIR BLEED VALVE BODY 5448
FEED NOZZLE, GREY 5409 FILTER (BACKPACK) 5449
DESCRIPTION PART
NO.
REFILLING SYSTEM/MICR OPAK BACKPACK
CAP AND FILTER ASSEMBL Y FOR 5404
NO.
17
TROUBLESHOOTING
A) Atomiser disc spins but does not spray or sprays irregularly. Check:
The feed nozzle. If the feed nozzle is incorrectly fitted refit it properly, if it is
blocked remove and soak in soapy water. Never blow through the feed nozzle
with your mouth.
The atomiser disc is clean and undamaged. Clean or replace.
The flow valve and refilling system for blockages (if using a backpack). Rinse
through with soapy water (or kerosene if using ULV products).
The red bottle cap is screwed on correctly and undamaged (if using the one litre
twin neck bottle) and that the seal inside the cap is in place and undamaged.
B) Atomiser disc fails to spin or spins unevenly/intermittently. Check:
The switch. If the brass screw looks worn turn it to a new position (with unworn
thread) using a screwdriver or coin.
That the batteries are fitted correctly.
The condition of the batteries (see below). Replace if necessary.
That the extension tube is clean and moves freely.
That the electrical terminals and contact points are clean and that electrical wires
are not broken or corroded. Check that the terminal connecting springs on the
motor are in place if the spray head has previously been disassembled.
If the atomiser disc is rubbing on the motor base plate or the motor shaft is bent,
Replace the disc or motor if necessary (see ‘STORAGE AND
MAINTENANCE’ for motor replacement).
The motor for corrosion or obvious signs of wear. Replace if necessary (see
‘STORAGE AND MAINTENANCE’ for motor replacement).
C) Liquid leaks from the bottle holder on the spray head. Check:
The red bottle cap is screwed on correctly and undamaged (if using the one litre
twin neck bottle) and that the seal inside the cap is in place and undamaged.
The flow valve is closed (if using a backpack and refilling system).
The feed nozzle. If the feed nozzle is incorrectly fitted refit it properly, if it is
blocked remove and soak in soapy water (or kerosene if using ULV products).
Never blow through the feed nozzle with your mouth.
N.B. Battery condition can be checked with a torch (or a torch lightbulb and electrical
wire).
18
DECLARATION OF CONFORMITY
Name of manufacturer or supplier: Micron Sprayers Ltd.
Full postal address: Bromyard Industrial Estate,
BROMYARD, Herefordshire
Country of origin: England
Post code: HR7 4HS
Description of Product: Battery powered, hand-held
agricultural spraying machine.
Name and model number of machine: ULVA+
Place of Issue: Bromyard, England
Name of authorised representative: G. S. Povey
Position of authorised Representative: Joint Managing Director
The sound pressure level at the operator’s ear does not exceed 70 dB(A). The
weighted RMS acceleration value at the hands when using this machine does not
eaceed 2.5 m/s2. Weight of machine (ready to spray): 2.6Kgs (7.5Kgs. With 5 litre
backpack)
DO NOT USE in an explosive atomosphere.
DECLARATION:
I declare that as the authorised Representative, the above information
in relation to the supply/manufacture of this product is in conformity
with the requirements of the Machinery Directive 2006/42/EC and
complies with the relevant essential health and safety requirements.
Signature of authorised Representative:
19
NOTES
20
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