Meech 935 User manual

Model 935
Ionising Air Blower
Operating
Manual

Contents
Introduction 3
Inspection 4
Operation 5
Installation 6
Technical Data and Construction 8
Maintenance 9
Fault Finding 12
Repairs and Warranty 15
CE Approval 16
UL Certication 16
Health and Safety 16
Technical Drawing 17
Products shown in this document may be covered by one or more patents, patents applied for
and/or registered designs and/or trade marks. For further information please refer to our Head
O󰀩ce or visit www.meech.com.
© Meech Static Eliminators Ltd., 24.11.2017

Introduction
The Model 935 Ionising Blower provides effective long range ionisation over a large
area. Its versatility makes it suitable for a wide range of industrial applications.
The Model 935 comprises an ionisation head and an integrated fan system. A high
volume flow of ionised air is generated by blowing air through the ionisation head
at the mouth of the unit. Ionisation is provided by powerful 915 bars, generating an
ionised field to a depth of up to 2000mm. The 935 unit is powered by the Model 904
and is available in both 110V and 240V versions.
There are many benefits to the Model 935, such as shockless operation due to a
resistively couples ionisation head. As the ionisation is provided by the 915 bars it
allows for powerful ionisation and very fast decay times. As it has a high volume air
flow it provides highly effective long range ionisation.
The 935 is flexible in a number of industries and also allows for simple installation and
mounting to suit any application. As it is made to suit any application, the model has a
variable fan speed and the air flow can be adjusted.
Due to the removable grill, it allows for easy access for maintenance of the ionisation
head.
Meech blowers are powerful static eliminators which give many years of excellent
service, provided that the following instructions are observed closely. 3

Unpacking and Inspection
The Model 935 Blower was carefully packed at the factory. Nevertheless, we
recommend careful examination of the carton and contents for any damage. If damage
is evident, keep the packing material and immediately notify the carrier of a possible
damage claim. Shipping claims must be made by the consignee to the delivering
carrier.
Contents:
Standard
935 Blower Mounting Kit
IEC cable
4

Operation
The typical Meech Blower installation consists of one or more blowers connected to a
Meech Power Unit.
THIS APPLIANCE MUST BE GROUNDED/EARTHED THROUGH THE MAINS
ELECTRICAL SUPPLY.
The Power Unit converts the primary electricity supply into a high voltage, low
amperage output. This energy is transferred to the Meech Bars in the mouth of the
blower by the HT cable.
The titanium pins of the bars emit the energy to form an ionised air corona. The
fans inside the blower provide an air flow to transport the corona to the object to be
neutralised. When a statically charged object passes through this corona, the free
moving ions are attracted to the opposite charge on the object. In this way the static
electricity is neutralised. Unused ions in the corona recombine or are discharged to
earth.
5

6
Installation
The correct positioning of the blower is vital to the efficient operation. Please observe
the following instructions.
Distance From Object
Although the blower has excellent long range neutralisation capabilities, the general
rule is that it should be as close to the object as possible.
Good results can be achieved at distances up to 1500mm but as the distance from the
object increases, the speed of the neuralisation will decrease.
Decay Times
The table below shows the decay times of the charge between 5000V and 500V in
relation to the distance from the 935.
Distance Time
300mm 0.4s
900mm 3.8s
1500mm 8.0s

7
Intervening Objects
If the ionised air is blown through earthed objects (eg a machine frame or cross-rods),
these will absorb some of the ionisation and so reduce the neutralisation power. Avoid
this whenever possible.
CAUTION: It is recommended that the following procedure be observed for safe
operation of the Model 935 Blower:
The supply voltage of the power supply must be interlocked with the ON/OFF
control of the machine to which the equipment is fitted.
This will ensure that whilst the machine is switched off and thus operatives may gain
access to the machine and our equipment, there will be no danger to operatives
working in close proximity to our product.
It is assumed that normal safety barriers are in place on the machine to ensure that
operatives are unable to access the machine and hence our equipment whilst the
machine is switched ON.

8
Technical and Construction
Dimensions 184 x 172 mm
Maximum length 200-2400mm in 200mm steps
Operating range 200mm – 1500mm
Weight 5.4kg approx for 400mm blower with 3m cable
(Standard)
Construction Extruded anodised aluminium body with steel plate
ends
Mounting Steel xing brackets supplied with each unit
Input Voltage 110V or 240V
Output Voltage 7kV
Electrical Connection Bars - 900 connection (m4 heatshrunk eyelet), Fans -
IEC mains connector
Max ambient temperature 60°C
Pin energy 0.15 Millijoules
Cable 3 meters of HT cable as standard. Longer lengths avail-
able when ordering
Switch On/o󰀨 switch on backplate for fans
Emmitters Sharp titanium pins

Maintenance
The Static Eliminator bars in the mouth of the blower should be cleaned regularly to
keep the emitter pins free from dust and other contaminants. A toothbrush is ideal for
this.
Cleaning of the emitter pins of the ionisation bars
Ensure the blower is switched off and isolated from the mains electrical supply.
Remove the front black plastic grill by bending gently and pulling out.
9

Using a tooth brush (or a similar brush with non conductive bristles), brush the pins and
upper surface of the two white ionising bars.
With a cloth clean the exterior and interior surfaces of the blower.
10

Replace the black plastic grill by the reverse procedure.
11

12
Fault Finding
Tests must be completed by a qualified electrical engineer.
If in doubt contact Meech head office or your local distributor.
CAUTION: Whilst no danger to personnel exists, it is essential than any high
voltage ionising equipment, make no contact with water or water based fluids.
Should such an event occur, disconnect immediately and return equipment to the
manufacturer for water damage assessment. High voltage electrical equipment should
not make contact with water.
The Model 935 blower forms part of a system, comprising itself and a Model 903 or
904 power supply.
To verify where a fault may have occurred it is important to test each item of the
system individually. Should more than one ionising appliance be connected to one
power supply, these must be tested individually.
To check the Model 935 blower follow the procedure detailed below.
Switch off the electrical supply to the system.
Disconnect all ionising appliances from the power supply.
Follow the test procedure for the Model 903 / 904 power supply. This can be found in
the relevant instruction manual.
Having checked the power supply reconnect the 935 blower.

Using a high voltage probe (RS 610 281) and meter (RS 610 590) measure the
voltage on the pins of the ionising bars. The voltage should be approximately ~ 6.5 kV.
If the voltage is below 4.5 kV, then the item should be returned to Meech for service
and / or repair.
If no meter and probe is available, then a fast and simple test is to simply short a pin
of one of the ionising bars to earth using a length of insulated electrical cable bared
back 3 mm at either end.
Connect one end of the cable to the earth post of the blower.
Approach the pin of the bar with the other end of the cable. As the
conductors of the cable approaches the pins of the bar a small faint spark should jump
from the pin to the cable conductors. If the bar is under direct sunlight or bright lights
it may be difficult to see this spark.
13

As the spark is drawn a slight buzzing sound will also be heard. This would indicate
the bar is functioning correctly.
If there is more than one appliance to test, disconnect the first item and repeat the
above steps.
14

Repairs And Warranty
The 935 blower is warranted by Meech Static Eliminators Ltd to the original purchaser
against defects in material and workmanship for one year after purchase. Should any
malfunction occur, please return the bar directly to Meech Static Eliminators or your
local agent. All products returned to the factory MUST be accompanied by a return
authorisation number and must be shipped prepaid. For prompt service, ship the unit
to the factory with the return authorisation number shown clearly on the label. Be sure
it is well packed in a sturdy carton with shock absorbing material.
Include a note stating the nature of the problem as specifically as possible, and also
include instructions for returning the bar to you. We will pay one-way return surface
shipping costs on any repairs covered under the warranty.
Field repairs should not be undertaken during the warranty period. Repair attempts by
unqualified personnel will invalidate the warranty.
15

CE Approval
An EC Declaration of Conformity for this product exists in respect of the Low Voltage
Directive: 72/23/EEC (“LVD”) & Electromagnetic Compatibility Directive: 89/336/EEC
(“EMCD”)
Health and Safety
Emission of Ozone: Considerably below international standard of 0.01 ppm.
16

Technical Drawing
17
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© Meech Static Eliminators Ltd 2016
Product shown in this document may be covered by one or more patents, patents applied for and/or registered designs and/or trade marks. For further information please refer to our Head Office or visit www.meech.com.
Meech International UK: [phone] US: [phone] Belgium: [phone] email: [e-mail]
Hungary: [phone] China: [phone] India: [phone] web: www.meech.com
Product Data Sheet
Published Date: 09.12.2013

©Meech Static Eliminators Ltd 2017 www.meech.com
Meech International
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