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Checks to be carried out at InstallationExtract from "Application of electro-sensitive protective equipment using light curtains and light beam devices to machinery" HSE Publication HSG180 120
The initial inspection and test should be carried out
by competent persons with the necessary knowledge and experience, who posses, or
have access to, all the information the machine and ESPE supplier should have
provided. The competent person could be, for example, an in-house inspector or,
more likely, a representative of the installer or supplier, or an independent
inspecting engineering surveyor. 121
The results of the initial inspection and test should
be recorded, and copies of this record kept by the user. The results of
inspection and test following repair or modification which may affect the safe
operation of the ESPE should also be recorded and copies kept by the user. 122
The person carrying out the inspection and test
should ensure that the following general standards of performance is achieved: (a)
it should not be possible for the dangerous parts of the machine to be
set in operation while any part of a person is in a position as to actuate the
AOPD: (b)
actuation of the AOPD during phase of the operating cycle when there is
or may be a risk should result in the dangerous parts being arrested or assuming
an otherwise non-hazardous condition before any part of any person can reach
them. It should not be possible for the hazardous parts to be put into operation
again until the protective equipment has been completely restored to its normal
condition and the machine controls reoperated. 123
The persons carrying out the inspection and test
should also: (a)
inspect the position of the AOPD (e.g. light curtain) to ensure that it
is set at the correct separation distance from the danger zone as recorded on
the machine and/or ESPE information label or plate. (b)
ensure that additional safeguards have been provided where necessary to
prevent access to the danger zone from any direction not protected by the AOPD: (c)
test the overall response time using a timing instrument designed for
that purpose and ensure that it is the same as or less that the overall response
time recorded on the information label or plate: (d)
test that it is not possible for a person to stand between the AOPD and
the danger zone: (e)
test the AOPD detection capability according to the suppliers
recommendations: (f)
inspect the machine controls and connections to the ESPE to ensure that
the machine and ESPE designers requirements are met: (g)
inspect the stopping performance monitor (if fitted) to ensure that it is
correctly positioned and fitted, test that the monitor is working satisfactorily
to the suppliers recommendations, and ensure that the means by which the overall
system stopping performance can be assessed by the operator is indicating
correctly: (h)
test the muting arrangements and inspect the brakes or clutches (if
fitted) to the supplier’s recommendations. 124
The user should ensure that only competent persons
carry out the periodic inspections and tests. Such persons could be independent
inspecting engineering surveyors, machinery suppliers, ESPE suppliers, or from
within the user’s organisation. The recommended maximum period between each
periodic inspection and test is 6 months for type 4 ESPE and 12 months for type
2 ESPE, but this will depend on the equipment it is fitted to and the risk as a
whole. 125 The results of the inspection and test should be recorded and a copy of this record kept by the user. 126
The person carrying out the inspection and test should ensure that the same
general standards of performance are achieved as in paragraph 122 and should: (a)
carry out the inspection and test set out in paragraph 123, except for
paragraph 123(f). In the case of paragraph 123(c) alternative, equally effective
means of determining that the overall response time, recorded on the information
plate, has not been exceeded are permissible: (b)
inspect and test the machine primary control elements to ensure that they
are functioning correctly and are not in need of maintenance and/or replacement: (c)
inspect the machine to ensure that there are no other mechanical or
structural aspects that would prevent the machine from stopping or assuming an
otherwise safe condition when called upon by the ESPE to do so (d)
inspect the machine controls and connections to the ESPE to ensure that
no modifications have been made which adversely affect the system. AOPD - Active Opto-electric Protective Device ESPD - Electro-Sensitive Protective Equipment PERMITTED USES. Visitors to this Web Site are granted permission to access this Crown copyright material and download it onto electronic, magnetic, optical or similar storage media provided such activities are for the private research, study or in-house use only. RESTRICTED USES. Visitors to this Web Site must not copy, distribute, publish or sell any of the Crown copyright material taken from this Web Site. Any other use of Crown copyright material requires the formal permission of the Controller of Her Majesty's Stationery Office.
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