Meech 924EX User manual

1
Model 924EX
Pulsed DC Ionising Bar
Operating
Manual

Products shown in this document may be covered by one or more patents, patents applied for and/or reg-
istered designs and/or trade marks. For further informaon please refer to our Head Oce or visit www.
meech.com.
© Meech Stac Eliminators Ltd., Date 30.08.2018
Contents
Introducon..........................................................................................3
Cercaon..........................................................................................4
Unpacking and Inspecon ....................................................................4
Package Contents ................................................................................4
Features and Benets of 924EX............................................................6
Installaon............................................................................................9
Specic Condions of Use .................................................................15
Operaon ...........................................................................................16
Maintenance ......................................................................................17
Fault Finding .......................................................................................19
Technical and Construcon ................................................................22
Repairs And Warranty ........................................................................23
CE Approval ........................................................................................23
Health and Safety ...............................................................................23
Technical Drawing...............................................................................24

4

3
Introducon
The 924 is now available for use in Ex applicaons. The 924EX oers the same
outstanding levels of performance, reliability, easy maintenance and features
associated with Meech Pulsed DC technology. It is ATEX approved and can be
used in zone 1 applicaons. It is designed to control stac charges in short
range applicaons and is parcularly suited for use in hazardous areas and
applicaons such as gravure prinng, lm extrusion and coang.
The 924EX is a compact pulsed DC ionising bar designed to be used on the
most arduous stac eliminaon problems. The special resisve coupling
of its emier pins renders them shockless, whilst giving powerful stac
neutralisaon performance.
The 924EX is powered by the Hyperion 233v4 HL Pulsed DC Controller. They
are designed to work together as a system meaning that customer’s can now
benet from the features associated with the Hyperion range in hazardous
environments. The output voltage, frequency and balance can all be adjusted
to suit parcularly dicult applicaons and very sensive materials found in
EX zones.

4
Cercaon
EC type examinaon cercate No:
BASEEFA 18ATEX0082X
Unpacking and Inspecon
The Model 924EX Bar was carefully packed at the factory. Nevertheless, we
recommend careful examinaon of the carton and contents for any damage.
If damage is evident, keep the packing material and immediately nofy the
carrier of a possible damage claim. Shipping claims must be made by the
consignee to the delivering carrier.
Package Contents
Standard
924EX Bar Mounng Kit

5
Opons
BarMaster remote programmer.
Allows opmisaon of the output of
the 924EX
Hyperion 233v4 HL Pulsed DC
Controller
Power Cable - 4 Pin M8 (straight or
90º elbow) Available in 2,3,5 and
10M lengths.
24V DC Supply & C5 cable

6
Features and Benets of 924EX
Overall look
The prole of the 924 EX Bar provides ionisaon through alternang posive
and negave emier pins mounted in a PC ABS extrusion. The emier pins
are resisvely coupled to the high voltage pulsed DC source, rendering the
emiers shockless to touch and will give many years of service.
Compact Size and Full Length Ionisaon
The small cross-seconal size of the 924EX means that it will t into ght
installaon posions. The bar has been designed to give full performance
over its enre length, ensuring full coverage of webs that run close to
machine frames.
Sealed Contrucon
Sealed IP67 construcon allows the bar to be used in harsh environments,
subject to wash-down or where there is the likelihood of spillages. Please
note. should the bar become wet, it must be thoroughly dried before being
powered-up.

7
Shockless Titanium Emiers
As with our Hyperion range bars, the 924EX uses Titanium emier pins.
Almost indestrucble, these pins will give many years service. For the comfort
and safety of the operator, the pins are resisvely coupled and shockless to
touch.
Divider
The 924EX is designed to operate in dirty, factory environments. To minimise
the impact of contaminaon and maximise the interval between cleaning, the
bar features a divider between the posive and negave emiers. This divider
is an essenal feature of the bar.

8
T-Slot
Mounng of the bar is made easy using the T-Slot at the rear of the bar. The
M4 T-Bolts used are the same as used on other Meech Pulsed DC bars.

9
Installaon
The Model 924EX Bar should be located in the most convenient posion so
that the pins of the Bar are directed towards the target area. The bar should
be posioned to give an unrestricted path for the ions to travel to the target
area.
The Meech Model 924EX must be connected to a Pulsed DC Controller, which
must be located outside of any EX zoned area.
POWER, INPUT AND OUTPUT (I/O) WIRING MUST BE IN ACCORDANCE WITH
CLASS 1, DIVISION 1 WIRING METHODS ARTICLE 501.10(b) OF THE NATIONAL
ELECTRICAL CODE , NFPA 70.
A) THIS EQUIPMENT IS SUITABLE FOR USE IN CLASS 1, DIVISION 1, II 2G IIC T4
GB, OR NON HAZARDOUS LOCATIONS ONLY
B) WARNING - EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY
IMPAIR SUITABILITY FOR CLASS 1, DIVISION 1
C) WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT
UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO
BE NON-HAZARDOUS.
The 924EX connects to the Pulsed DC Controller by plugging the male plugs,
found at the end of the bar cabling, directly into the high voltage sockets of
the controller. The plugs and sockets are marked with “+” posive and “-”
negave indicators for correct connecon to the power supply.

10
Connect ionising equipment using grey HT connecons. Next, connect the
mains supply to the Pulsed DC Controller and switch ON. The 924EX Bar will
now produce Pulsed DC ionisaon from the emiers of the Bar.
A grounding post on the controller is provided for this purpose. Meech
recommend that, for certainty, the controller is grounded using this post, in
addion to using a grounded 24V DC supply

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WARNING
Meech Pulsed DC Controllers require a grounded 24V DC supply. The 0V line
must be connected to ground. Failure to do so, will result in damage to the
ioniser or the 24V supply and will void the warranty.
The shockless emier pins produce ions of posive and negave polarity.
These, because of the product’s unique design, propel themselves away from
the emier points towards the target area.
The maximum output voltageis 5.5kV to respect the ATEX cercaon of the
924EX bar.
Opmum stac eliminaon can be achieved by adjustment of the “Rate”
(frequency of pulsing) and the “Balance” (proporon of posive to negave
ions generated) on the Controller.
If the bar is posioned a long distance from the target area the “Rate” should
be set to the lowest seng. If the bar is posioned close to the target area
the “Rate” should be set towards its maximum.
WARNING
Meech Pulsed DC Controllers require a grounded 24V DC supply. The 0V line
must be connected to ground. Failure to do so, will result in damage to the
ioniser or the 24V supply and will void the warranty.

12
Operating Distance (mm)
Requires optional BarMaster Remote Programmer. and Pulsed DC Controller
Frequency Rate (Hz)
Optimum Frequency Vs Operating Distance for 924EX
If the polarity of the stac charge to be removed is known, the balance can be
adjusted to give a faster decay speed.
I.E. a) If the stac charge is known to be posive the balance should
be adjusted towards negave on the controller.
b) If the stac charge is known to be negave the balance should be
adjusted towards posive on the controller.
High
Low

13
Mechanical Installaon
The 924EX is a short to mid-range bar. Dependent on the applicaon, the bar
will be mounted between 20mm and 200mm from the target surface.
The bar should be mounted securely, using all the M4 T-bolts provided with
the bar.
Correct posioning of the bar is vital for eecve stac control. There must
be no metallic objects or obstrucon between the bar and the material. The
diagram shows the area that should be kept clear.
Where “x” lengths are equal.

14
When installed at short range over a web or sheet, the bars must be
posioned away from surfaces and rollers, as shown in the following
diagrams.
Your Meech distributor will be able to assist with quesons regarding
posioning of your equipment.

15
Specic Condions of Use
 If there is any damage to the web or material that is being neutralised
by the stac eliminator bar, then the bar must be checked for damage
and relevant maintenance or replacement of the bar carried out.
 The equipment may not be used in associaon with dusts having an
electrical resistance equal to or less than 10³Ω.m.
 The Meech 924EX stac eliminator bar shall be supplied only by the
Meech Hyperion 233v4HL Pulsed DC Controller that is set to produce
5.5kV peak maximum.
 The equipment must be installed so that it is shielded from UV light.
 The user must determine, in consultaon with the manufacturer, the
suitability of the apparatus for use with parcular solvents.
 The plasc case presents a potenal stac discharge risk and while in
a hazardous area must be cleaned only with a damp cloth.

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Operaon
Having connected the male grey HT plugs to the power supply, power up the
power supply and check the Pulsed DC Controller. The controller will indicate
that the bar is running correctly with a good ion output.
CAUTION:
Always turn o the power supply before connecng or disconnecng the
male grey HT plugs. Failure to do so could result in stored charges giving a
small electric shock.

17
Maintenance
Ionising bars become contaminated with usage. Dirt build-up on the body of
the ioniser and, parcularly on the pins, will cause a drop in performance. To
get the best from your bar, it should be cleaned as part of regular machine
maintenance.
If regular cleaning is not carried out, the controller will detect the drop in
performance and trigger the Clean Pin alert. See operang manual for the DC
Controller.
Before cleaning, ensure that the equipment is switched o.
Emier pins can be cleaned very eecvely with a brush. A dry toothbrush is
ideal.
Make sure the central divider is also cleaned and the pin surface of the bar.

18
Ionising bars will need periodic wiping to clean grey deposits from the surface
of the bar. A cloth moistened with a small amount of IPA or methylated spirits
is recommended.
Let dry for a minute and turn back on.