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Se rv ice M a nu al HS-6 0 2 Ope rati on al saf et y 03/ 200 3 U S Iss ue 2.8 L ock out and t ag ou t pro cedur e 63 2 Fig. 2.8 - 1 Loc king th e moto r con tacto r – Th e tag out alternative If a m achine c an be locked…

2 Operational safety Service Manual HS-60

2.8 Lock out and tag out procedure 03/2003 US Issue

2.8 Lock out and tag out procedure

2.8.1 Purpose and scope

Before performing any maintenance work or service work, a procedure of locking and tagging

must be followed. The procedure, when followed correctly eliminates the possibility of an em-

ployee being injured. 2

PLEASE NOTE These procedures represent the minimum lock/tag out requirements. Any addi-

tional safeguards needed to complete work safely can be specified by facilities supervision, the

safety officer, the safety committee and the health department. 2

2.8.2 Description

Whenever it becomes necessary to isolate, control and release energy, the following procedure is

to be followed 2

(1) Notify affected employees.

(2) Shut down the equipment. Carry out all normal stopping procedures, such as

– depressing the stop button

– shutting down the station computer or

– switching off the placement system at the main switch and

(3) Isolate the equipment from all its energy sources such as

– compressed air supply and

– power supply.

(4) Lock out the equipment.

– Apply a lock and lock out whenever possible, e.g. at the motor contactor.

Service Manual HS-60 2 Operational safety

03/2003 US Issue 2.8 Lock out and tag out procedure

Fig. 2.8 - 1 Locking the motor contactor

– The tag out alternative

If a machine can be locked out, it must be. However, there are situations where energy iso-

lating 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. 2

1. Turn the operating lever (1) counter-clockwise.

2. Use the screwdriver to push the locking lug (2) out of the operating lever (1).

3. Secure the operating lever with a padlock (3).

2 Operational safety Service Manual HS-60

2.8 Lock out and tag out procedure 03/2003 US Issue

(5) Relieve stored energy

Stored energy in the compressed air supply or electrical energy in electrolytic capacitors must

be released by appropriate means. 2

– After switching off the placement machine wait until the voltages and the compressed air

have discharged (see Sections 2.5

and 2.6), to be able work without any risk.

(6) Verify the lock out.

Testing the lock out can be done simply by pressing the start button. 2

(7) The following steps must be taken to restore the machine to operation.

(8) Check the area. Authorized employees should remove all of their tools and reinstall all guards.

(9) 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. 2

(10)Remove locks/tags

Each authorized employee must remove his or her own lock. Each authorized employee will

have his or her own lock. 2

(11)Turn the machine on. Authorized workers should observe the equipment in operation to insure

repairs were done correctly.

2.8.3 Testing

The maintenance or electrical person may test the circuits by energizing the circuit for a short pe-

riod of time without voiding the lock out procedure provided. This may be done only when no other

work is being performed by any other person on the equipment being tested. 2

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

2.8.4 Responsibilities

(1) It shall be the responsibility of the maintenance and electrical personnel to make sure this pro-

cedure is adhered to.

(2) It shall be the responsibility of the maintenance and electrical personnel’s immediate supervi-

sor to instruct his personnel on this procedure.

(3) 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.