Meech 914 Manuel utilisateur
Model 914
Operating
Manual
Shockless AC Bar
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
Oce or visit www.meech.com.
© Meech Static Eliminators Ltd., 26.10.2017
Contents
Introduction 3
Inspection 3
Operation 4
Installation 5
Technical and Construction 8
Maintenance 9
Fault Finding 10
Repairs and Warranty 14
CE Approval 15
Health and Safety 15
3
Introduction
The Meech Model 914 has been designed to meet the most arduous of static
elimination problems. The special resistive coupling of its emitter pins renders them
shockless, whilst giving powerful static neutralisation performance. This enables the
bar to eliminate very high static charges on high speed webs and at longer ranges
than has been previously possible.
Inspection
The Model 914 Bar 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.
4
Operation
The typical Meech Model 914 installation consists of one or more bars
connected to a Meech Model 905 Power Unit.
The Power Unit converts the electrical supply into a high voltage, low
amperage output. This output energy is transferred to the 914 bar by the
HT cable.
The resistively coupled electrodes are energised by the AC voltage from the Power
Unit. The electrodes emit this energy (corona discharge) in the form of a eld of
ionised air. This ionised air supplies ions of both polarities.
Electrostatically charged products which pass through this corona are
immediately neutralised and become static free.
Under test conditions, the Meech Model 914 has been found to give charge decay
times that are up to eight times faster than standard AC shockless
eliminator bars.
5
Installation
The 914 Bar can be placed between 25mm and 100 mm from the surface to be
neutralised. It is important to ensure that the target surface has free air on both sides
and that earthed metal objects are, where possible, at least 20 mm away from the bar.
These precautions will maximise the unit’s ionisation capability.
Good results can be achieved at distances up to 100mm but as the distance from the
object increases, the speed of charge neutralisation will decrease.
A typical installation distance is 40mm from the target surface. This gives
excellent performance at high web or product speeds, whilst avoiding possible
damage from web breaks or product mis-feeds. Very fast webs may require the bar to
be as close as 25mm to the web.
Correct positioning of the bar(s) is vital to ecient operation. The following diagrams
show the correct installation procedures:
1. The optimal distance from material to be neutralised.
Mounting of the bar is by 20mm M4 studs mounted at the rear of the bar.
The chassis of the bar is electrically connected to ground on the power unit via
6
the exible armoured conduit. However, it is good practice to provide a secondary
grounding through the xing points where practical.
The HT cable and armoured conduit require connection to a Meech model 905 power
unit. Please consult the 905 instruction manual for further instruction.
2. Free space is required on opposite sides of the target material, not a roller or solid
object.
7
3. Avoid proximity to earthed parts of the machinery as this will distort the corona and
reduce its eciency.
4. If bars are needed on both sides of the material, they should be staggered.
5. The bars must be earthed for correct operation. If in any doubt, run an earth wire
from the bar to the earth stud on the power unit.
8
Technical and Construction
Operating voltage : 5.0 kV AC
Max temperature : 85°C
Length : Available in lengths of 80 mm to 4000 mm in
25 mm steps. Overall length is 60mm greater
than the eective length.
Cable : 2 metres of HT cable shielded in exible
conduit is supplied as standard. Alternative
lengths are available to suit specic
applications
Weight : Approx 400gms per 1000mm length
Cross section : 14mm (W) x 17mm (H)
Construction : Anodised aluminium outer with PVC
extruded liner and resin potted components.
Emitter Points : Titanium pins with integral emitters
Mounting : 2 x M4x20mm studs.
Operating Range : 25 - 100mm
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