00900002-01_UM_ASM-ProcessLens_EN.pdf - 第40页
2 Safety 2.7 Lock out and tag out procedure 40 Instruction Guide ASM ProcessLens 02/2017 2.7.2 Description Whenever it becomes necessary to isolate, control and release energy, the following procedure is to be followed: …
2 Safety
2.7 Lock out and tag out procedure
Instruction Guide ASM ProcessLens 02/2017 39
2.6.2 Energy state of the machine after switching off the main power switch
WARNING
Some parts of the system carry potentially lethal voltages
The machine is supplied with 1/N/PE ~ 240, 50/60 Hz mains voltage. This means that some
parts of the system carry potentially lethal voltages - even when switched off at the main
power switch. Incorrect handling of the machine can therefore result in death or severe in-
jury or considerable damage to equipment.
► Always follow the applicable accident prevention and safety regulations (particularly
DIN EN 60204, part 1 or IEC 60204, part 1) and the safety regulations in your own
country.
The following components still carry potentially lethal voltages even if the main power switch is
switched off:
●
Mains connection terminals of the main power switch.
NOTICE
ASM ProcessLens electrical diagrams
For details, please refer to the ASM ProcessLens electrical diagrams.
To avoid losing data, assess the following criteria before switching off your machine (apart from in
emergencies):
●
Has the machine finished transmitting machine and recipe data?
●
Has the machine finished processing the PCB?
●
Has the machine software completed the shot-down phase?
2.6.2.1 Machine switched off at the main power switch and disconnected
The machine is unpowered, apart from slight residual voltages in the power supply unit.
2.7 Lock out and tag out procedure
2.7.1 Purpose and scope
Before performing any preventive maintenance work or service work, a procedure of locking and
tagging must be followed. The procedure, when followed, correctly eliminates the possibility of an
employee being injured.
NOTICE
Additional safety measures
These procedures represent the minimum lock out/tag out requirements for the machine
during preventive maintenance work and service work. Any additional safeguards needed
to complete work safely can be specified by facilities supervision, the safety officer, the
safety committee and the health department.
2 Safety
2.7 Lock out and tag out procedure
40 Instruction Guide ASM ProcessLens 02/2017
2.7.2 Description
Whenever it becomes necessary to isolate, control and release energy, the following procedure is
to be followed:
► Notify affected employees.
► Shut down the equipment. Carry out all normal stopping procedures:
– Press the Stop button,
(see fig. "Position of buttons and switches" [}34]).
– Switch off the ASM ProcessLens inspection software.
– Shut down the control computer.
– Switch the machine off at the main power switch (see fig. "Position of buttons and
switches" [}34]).
► Isolate the machine from all its energy sources:
– Disconnect the main power connection.
► Lock out the machine:
– Attach a lock whenever possible (e.g. to the main power switch).
NOTICE
Alternatively: Tag out procedure
If a machine can be locked out, it must be. However, there are situations where energy isol-
ating devices cannot accommodate locks. In these cases, the energy isolating devices
must be tagged to warn employees that the machine is de-energized for servicing. The tag
must be securely fastened, it must be placed in a position visible to all and it may only be
removed by the person who attached it.
► Release stored energy:
Stored energy in the electrical energy in electrolytic capacitors must be released by appro-
priate means.
– After switching off the machine, wait the specified discharge time (see sections 2.6 "Resid-
ual voltages and discharge times in the machine" [}38] and 2.7 "Lock out and tag out pro-
cedure" [}39]), before the machine can be operated again without risk.
► Verify the lock out:
Testing the lock out can be done simply by pressing the start button.
► The following steps must be taken to restore the machine to operation:
– Check the area. Authorized employees should remove all of their tools and reinstall all
guards.
– Notify all affected employees.
– Before removing even one lock or tag, inform all workers in the area that the machine is
going to be restarted.
– Remove locks/tags
– Each authorized employee must remove his or her own lock. Each authorized employee
will have his or her own lock.
– Turn the machine on. Authorized workers should observe the equipment in operation to
ensure repairs were done correctly.
See also
2 2.5.2.1 "Position of switches and buttons on the machine" [}34]
2.7.3 Testing
Service personnel may test the circuits by activating them briefly without canceling the locking
method. This may be done only when no other work is being performed by any other person on the
equipment being tested.
It is extremely important that all remote start switches be tagged with the Do Not Operate tag to
prevent inadvertent operation of the equipment during these periods.
2 Safety
2.7 Lock out and tag out procedure
Instruction Guide ASM ProcessLens 02/2017 41
2.7.4 Responsibility and obligations
●
It shall be the responsibility of the maintenance and service personnel to make sure this pro-
cedure is adhered to.
●
It shall be the responsibility of the maintenance and service personnel’s immediate supervisor
to instruct his personnel on this procedure.
●
It shall be the responsibility of the Safety Officer with assistance from the Safety Committee,
Health Service Department, and the various managers and Vice-presidents to administer the
lock out/tag out procedure.
2.7.5 Training
●
Staff training:
– The safety regulations require training for every individual. Of course, not every employee
is exposed to the same degree of danger or is involved with lock out/tag out as others are.
So extensive training is not necessary for everyone.
– To determine how much training to provide for each worker, the employees are divided into
three groups. Each group has its own level of training.
●
Authorized employees:
– These workers actually install the locks and tags and do the preventive maintenance or
service work. So they must know the most about controlled energy. First, they must be
able to recognize all energy sources and measure the amount of energy. Authorized em-
ployees must look for energy sources out of the realm of the obvious. These energy
sources include electrical, mechanical, hydraulic, pneumatic, chemical, thermal and gravit-
ational. Once these workers can recognize all energy sources they must be taught how to
isolate, control, and release the energy without any risk.
●
Affected employees
– These are workers who operate the machinery or equipment that may be de-energized.
Other employees who may be affected include those who work in an area that contain
equipment that may be locked/tagged out. These employees have to be instructed about
the nature of the energy control program. They must know why lock out/tag out is import-
ant, what tags and locks look like and why they must not remove tags or locks.
●
All others
– As the name implies, any employee who is not affected or authorized fits into this category.
These employees include office personal, managers, and upper management. Although
they do not have a direct relationship to the machinery being locked or tagged, they have
to receive some training.
– To evaluate the lock out/tag out procedure, the safety department will conduct periodic in-
spections. As part of the inspection the safety department will document that all facets of
the procedure are followed. The safety department will follow up with formal classroom re-
view or retraining of the lock out/tag out procedure.
2.7.6 Review
This procedure will be reviewed and amended as required, and at least once a year.