Meech 915 Manuale utente
Model 915
Shockless AC Bar
Operating
Manual
Contents
Introduction 3
Inspection 4
Operation 5
Installation 6
Technical Data and Construction 9
Maintenance 10
Fault Finding 11
Repairs and Warranty 16
CE Approval 17
UL Certication 17
Health and Safety 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
Oce or visit www.meech.com.
© Meech Static Eliminators Ltd., 26.10.2017
Introduction
The Meech Model 915 has been designed for use on the most arduous 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 previously been possible.
3
Inspection
The Model 915 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 915 installation consists of one or more bars connected to a
Meech Model 904 Power Unit.
The Power Unit converts the electrical supply into a high voltage, low amperage
output. This output energy is transferred to the 915 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 field 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 915 has been found to give charge decay
times that are up to eight times faster than standard AC shockless eliminator bars.
5
6
Installation
The 915 Bar can be placed between 25mm and 150 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 150mm but as the distance from the
object increases, the speed of charge neutralisation will decrease.
A typical installation distance is 50mm 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 efficient operation. The following diagrams
show the correct installation procedures:
1. The optimal distance from material to be neutralised.
7
Mounting of the bar is by 20mm M4 studs mounted in a track at the rear of the bar.
These can be slid to any point along the bar’s length to meet the machine’s available
fixing points.
The chassis of the bar is electrically connected to ground on the power unit via the
flexible armoured conduit. However, it is good practice to provide a secondary
grounding through the fixing points where practical.
The HT cable and armoured conduit require connection to a Meech model 904 power
unit. Please consult the 904 instruction manual for further instruction.
1. Free space is required on opposite sides of the target material, not a roller or solid
object.
8
2. Avoid proximity to earthed parts of machinery as this will distort the corona and
reduce its eciency.
3. If bars are needed on both sides of the material, they should be
staggered.
4. 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.
Indice
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